feat(gpu): #1978 AI数字人口型同步接入MuseTalk GPU Worker

业务侧（LipsyncService）集成 GpuLipsyncService：
- 新增开关 USE_GPU_LIPSYNC（env，默认false；staging默认true方便联调，生产默认false待稳定后开）
- _submit_audio_direct 在签名提交 MediaKit 前判断：
  * 开关关闭 → 直接走现有 MediaKit 云端 lipsync
  * 开关开但无可用 Worker（last_heartbeat_at 超5分钟窗口） → 回退 MediaKit
  * 开关开+Worker可用 → 创建GPU任务→同步轮询等待结果
- GPU路径成功：直接标记 job.status=completed、output_video_url=签名后的结果URL
- GPU超时（默认1200s）/终态failed/异常 → 全部回退 MediaKit，对用户透明
- 轮询间隔默认5s，可配 GPU_LIPSYNC_POLL_INTERVAL
- Worker心跳新鲜度窗口可配 GPU_WORKER_STALE_SECONDS（默认300s）

GpuLipsyncService新增方法：
- has_available_worker()：判断5分钟内有心跳的Worker存在
- wait_for_result(task_id, timeout, poll_interval)：同步轮询DB等待终态，
  期间顺手 _recover_timed_out_tasks；超时返回None让调用方兜底

env/CI配置：
- .env.example 新增4个配置项注释
- deploy/configs/.env.staging USE_GPU_LIPSYNC=true（联调）
- deploy/configs/.env.production USE_GPU_LIPSYNC=false（暂不开）

单元测试：tests/unit/test_lipsync_gpu_integration.py 9个用例覆盖：
- 开关关不调用GPU、无Worker回退、GPU成功completed、超时回退、
  failed回退、异常回退、has_available_worker三种场景
- 全部 30个GPU相关测试全绿（含此前11+10个）

.env.example

@@ -213,3 +213,20 @@ TIKHUB_API_KEY=
 # apizero.cn API Key (https://v1.apizero.cn) — 国内抖音解析服务
 APIZERO_API_KEY=
 
+# ==================== GPU MuseTalk Worker（反向轮询口型同步）====================
+# GPU Worker 长期鉴权 Token，Worker 端 .env 的 GPU_WORKER_TOKEN 必须与此一致
+# 留空时 development 环境允许匿名访问（仅本地调试），staging/production 必须配置
+GPU_WORKER_TOKEN=
+# 单任务超时（秒），processing 超过此时长无任务心跳才回退 pending 或标记 failed
+# #1970：RTX2060 6G 推理 720p 长视频需 5 分钟以上，默认 900
+GPU_TASK_TIMEOUT_SECONDS=900
+# 是否启用 GPU 口型同步（开关）。开启后需同时有 Worker 在心跳窗口内（5分钟）才会走 GPU 路径；
+# 开关关闭 / 无可用 Worker / GPU 任务失败或超时 → 自动回退现有 MediaKit 云端 lipsync
+USE_GPU_LIPSYNC=false
+# 业务侧轮询 GPU 任务结果的间隔（秒）
+GPU_LIPSYNC_POLL_INTERVAL=5
+# 业务侧等待 GPU 任务总超时（秒）；超时回退 MediaKit
+GPU_LIPSYNC_WAIT_TIMEOUT=1200
+# Worker 心跳新鲜度窗口（秒），last_heartbeat_at 在此窗口内视为在线
+GPU_WORKER_STALE_SECONDS=300
+

.gitea/workflows/ci-pipeline.yml

@@ -1186,10 +1186,12 @@ jobs:
         DOUBAO_API_KEY: "${{ secrets.DOUBAO_API_KEY }}"
         DOUBAO_MODEL: "${{ secrets.DOUBAO_MODEL }}"
         DOUBAO_BASE_URL: "${{ secrets.DOUBAO_BASE_URL }}"
+        DOUBAO_VISION_MODEL: "${{ secrets.DOUBAO_VISION_MODEL }}"
         WECHAT_APP_ID: "${{ secrets.WECHAT_APP_ID }}"
         WECHAT_APP_SECRET: "${{ secrets.WECHAT_APP_SECRET }}"
         TIKHUB_API_KEY: "${{ secrets.TIKHUB_API_KEY }}"
         APIZERO_API_KEY: "${{ secrets.APIZERO_API_KEY }}"
+        GPU_WORKER_TOKEN: "${{ secrets.GPU_WORKER_TOKEN }}"
       run: |
         set -eu
         echo "Rendering .env from template + secrets..."
@@ -1640,10 +1642,12 @@ jobs:
         DOUBAO_API_KEY: "${{ secrets.DOUBAO_API_KEY }}"
         DOUBAO_MODEL: "${{ secrets.DOUBAO_MODEL }}"
         DOUBAO_BASE_URL: "${{ secrets.DOUBAO_BASE_URL }}"
+        DOUBAO_VISION_MODEL: "${{ secrets.DOUBAO_VISION_MODEL }}"
         WECHAT_APP_ID: "${{ secrets.WECHAT_APP_ID }}"
         WECHAT_APP_SECRET: "${{ secrets.WECHAT_APP_SECRET }}"
         TIKHUB_API_KEY: "${{ secrets.TIKHUB_API_KEY }}"
         APIZERO_API_KEY: "${{ secrets.APIZERO_API_KEY }}"
+        GPU_WORKER_TOKEN: "${{ secrets.GPU_WORKER_TOKEN }}"
       run: |
         set -eu
         echo "Rendering .env from template + secrets..."

alembic/versions/079_asset_atom_clips.py

@@ -0,0 +1,58 @@
+"""add asset_atom_clips table
+
+Revision ID: 079_asset_atom_clips
+Revises: 078_drop_script_title_fields
+Create Date: 2026-09-17
+"""
+
+import sqlalchemy as sa
+
+from alembic import op
+
+revision = "079_asset_atom_clips"
+down_revision = "078_drop_script_title_fields"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "asset_atom_clips",
+        sa.Column("id", sa.String(36), primary_key=True),
+        sa.Column(
+            "asset_id",
+            sa.String(36),
+            sa.ForeignKey("assets.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        sa.Column("start_time", sa.Float(), nullable=False),
+        sa.Column("end_time", sa.Float(), nullable=False),
+        sa.Column("duration", sa.Float(), nullable=False),
+        sa.Column("clip_index", sa.Integer(), nullable=False),
+        sa.Column("tags", sa.JSON(), nullable=False, server_default=sa.text("'[]'")),
+        sa.Column("scene_change_at", sa.Float(), nullable=True),
+        sa.Column(
+            "is_fallback",
+            sa.Boolean(),
+            nullable=False,
+            server_default=sa.text("false"),
+        ),
+        sa.Column(
+            "created_at",
+            sa.DateTime(timezone=True),
+            nullable=False,
+            server_default=sa.text("NOW()"),
+        ),
+    )
+    # 按素材查片段并按索引排序（复合索引前缀可独立用于 asset_id 过滤）
+    op.create_index(
+        "ix_asset_atom_clips_asset_index",
+        "asset_atom_clips",
+        ["asset_id", "clip_index"],
+        unique=True,
+    )
+
+
+def downgrade() -> None:
+    op.drop_index("ix_asset_atom_clips_asset_index", table_name="asset_atom_clips")
+    op.drop_table("asset_atom_clips")

alembic/versions/080_edit_plan_clips_atom_clip_id.py

@@ -0,0 +1,37 @@
+"""add edit_plan_clips.atom_clip_id for #1970
+
+Revision ID: 080_edit_plan_clips_atom_clip_id
+Revises: 079_asset_atom_clips
+Create Date: 2026-09-17
+"""
+
+import sqlalchemy as sa
+
+from alembic import op
+
+revision = "080_edit_plan_clips_atom_clip_id"
+down_revision = "079_asset_atom_clips"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "edit_plan_clips",
+        sa.Column(
+            "atom_clip_id",
+            sa.String(36),
+            nullable=False,
+            server_default=sa.text("''"),
+        ),
+    )
+    op.create_index(
+        "ix_edit_plan_clips_atom_clip_id",
+        "edit_plan_clips",
+        ["atom_clip_id"],
+    )
+
+
+def downgrade() -> None:
+    op.drop_index("ix_edit_plan_clips_atom_clip_id", table_name="edit_plan_clips")
+    op.drop_column("edit_plan_clips", "atom_clip_id")

alembic/versions/081_add_gpu_lipsync_tasks.py

@@ -0,0 +1,58 @@
+"""add gpu_lipsync_tasks and gpu_workers tables for MuseTalk reverse-poll worker
+
+Revision ID: 081_add_gpu_lipsync
+Revises: 080_edit_plan_clips_atom_clip_id
+Create Date: 2026-09-18
+"""
+
+import sqlalchemy as sa
+
+from alembic import op
+
+revision = "081_add_gpu_lipsync"
+down_revision = "080_edit_plan_clips_atom_clip_id"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # GPU Worker 注册表
+    op.create_table(
+        "gpu_workers",
+        sa.Column("worker_id", sa.String(100), primary_key=True),
+        sa.Column("hostname", sa.String(200), nullable=False, server_default=""),
+        sa.Column("gpu_name", sa.String(200), nullable=False, server_default=""),
+        sa.Column("free_vram_mb", sa.Integer(), nullable=False, server_default=sa.text("0")),
+        sa.Column("capabilities", sa.String(500), nullable=False, server_default=""),
+        sa.Column("last_heartbeat_at", sa.DateTime(), nullable=True, index=True),
+        sa.Column("created_at", sa.DateTime(), nullable=False, server_default=sa.func.now()),
+    )
+
+    # GPU 口型同步任务表
+    op.create_table(
+        "gpu_lipsync_tasks",
+        sa.Column("id", sa.String(36), primary_key=True),
+        sa.Column("lipsync_job_id", sa.String(36), nullable=False, server_default="", index=True),
+        sa.Column("user_id", sa.String(36), nullable=False, server_default="", index=True),
+        sa.Column("project_id", sa.String(36), nullable=False, server_default="", index=True),
+        sa.Column("video_url", sa.Text(), nullable=False),
+        sa.Column("audio_url", sa.Text(), nullable=False),
+        sa.Column("result_url", sa.Text(), nullable=False, server_default=""),
+        sa.Column("result_duration", sa.Float(), nullable=False, server_default=sa.text("0.0")),
+        sa.Column("status", sa.String(20), nullable=False, server_default="pending", index=True),
+        sa.Column("worker_id", sa.String(100), nullable=False, server_default="", index=True),
+        sa.Column("attempt", sa.Integer(), nullable=False, server_default=sa.text("0")),
+        sa.Column("error_msg", sa.Text(), nullable=False, server_default=""),
+        sa.Column("created_at", sa.DateTime(), nullable=False, server_default=sa.func.now()),
+        sa.Column("started_at", sa.DateTime(), nullable=True),
+        sa.Column("finished_at", sa.DateTime(), nullable=True),
+        sa.Column("updated_at", sa.DateTime(), nullable=False, server_default=sa.func.now()),
+        sa.Column("last_heartbeat_at", sa.DateTime(), nullable=True),
+    )
+    op.create_index("ix_gpu_lipsync_status_created", "gpu_lipsync_tasks", ["status", "created_at"])
+
+
+def downgrade() -> None:
+    op.drop_index("ix_gpu_lipsync_status_created", table_name="gpu_lipsync_tasks")
+    op.drop_table("gpu_lipsync_tasks")
+    op.drop_table("gpu_workers")

alembic/versions/082_atom_clip_ai_tags.py

@@ -0,0 +1,26 @@
+"""add ai_tags to asset_atom_clips for #1970 fragment-level AI tagging
+
+Revision ID: 082_atom_clip_ai_tags
+Revises: 081_add_gpu_lipsync
+Create Date: 2026-09-18
+"""
+
+import sqlalchemy as sa
+
+from alembic import op
+
+revision = "082_atom_clip_ai_tags"
+down_revision = "081_add_gpu_lipsync"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "asset_atom_clips",
+        sa.Column("ai_tags", sa.JSON(), nullable=True),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column("asset_atom_clips", "ai_tags")

apps/api/app/api/router.py

@@ -14,6 +14,7 @@ from app.api.routes.generation_cover import router as generation_cover_router
 from app.api.routes.generation_preview import router as generation_preview_router
 from app.api.routes.generation_tasks import router as generation_tasks_router
 from app.api.routes.generation_variant_plans import router as generation_variant_plans_router
+from app.api.routes.gpu_lipsync import router as gpu_lipsync_router
 from app.api.routes.health import router as health_check_router
 from app.api.routes.ingest_jobs import router as ingest_jobs_router
 from app.api.routes.internal_render import router as internal_render_router
@@ -211,3 +212,8 @@ api_router.include_router(
     prefix="/usage",
     tags=["Usage"],
 )
+api_router.include_router(
+    gpu_lipsync_router,
+    prefix="/gpu",
+    tags=["GPU Worker"],
+)

apps/api/app/api/routes/generation_tasks.py

@@ -16,10 +16,12 @@ from app.core.task_enqueue import (
 from app.dependencies import (
     get_asset_library_repository,
     get_asset_repository,
+    get_cosyvoice_service,
     get_db_session,
     get_generated_video_repository,
     get_generation_task_repository,
     get_project_repository,
+    get_voice_clone_profile_repository,
 )
 from app.schemas.generated_video import (
     GeneratedVideoResponse,
@@ -132,6 +134,8 @@ def _select_assets_from_library(
     mode: str,
     count: int,
     rng=None,
+    script_tags: list | None = None,
+    tag_names_by_id: dict | None = None,
 ) -> list[str]:
     """根据选取模式从素材库中选取 ready 状态的视频素材 ID。
 
@@ -141,6 +145,8 @@ def _select_assets_from_library(
         count: 选取数量，0 表示全部（仅 smart 模式有效）
         rng: 可选随机源（smart 模式排序噪声用），生产环境不传则内部随机；
             测试可注入固定种子或零噪声随机源获得确定性结果。
+        script_tags: #1970 叙事模式文案标签；非空时标签命中素材优先，不足再用其余素材兜底。
+        tag_names_by_id: asset_id → 素材标签名列表（素材只存 tag_ids 时由调用方查名称注入）。
 
     Returns:
         选中的素材 ID 列表
@@ -150,6 +156,20 @@ def _select_assets_from_library(
     if not ready_video_assets:
         return []
 
+    # 叙事模式（#1970 PR3）：文案标签命中池优先；无任何命中时完全降级为现有随机逻辑。
+    if script_tags:
+        from packages.domain.narrative_match import pick_narrative_assets
+
+        limit = count if count > 0 else None
+        picked = pick_narrative_assets(
+            ready_video_assets,
+            script_tags=script_tags,
+            tag_names_by_id=tag_names_by_id,
+            limit=limit,
+            rng=rng,
+        )
+        return [a.id for a in picked]
+
     if mode == "smart":
         # 智能匹配：统一使用 packages/domain/smart_match.py 的多维评分+多样性选取
         # 评分维度：质量分(40%) + 时长适配(30%) + 新鲜度(20%) + 未使用加分(10%)
@@ -162,16 +182,78 @@ def _select_assets_from_library(
     return [a.id for a in ready_video_assets]
 
 
+# #1970 PR3：video_ratio → 默认输出分辨率（显式 output_width/output_height 优先）
+_VIDEO_RATIO_DIMENSIONS = {
+    "9:16": (1080, 1920),
+    "16:9": (1920, 1080),
+    "1:1": (1080, 1080),
+    "3:4": (1080, 1440),
+    "4:3": (1440, 1080),
+}
+
+
+def _resolve_output_dimensions(request: CreateGenerationTaskRequest) -> tuple[int, int]:
+    """解析输出分辨率：显式 output_width/output_height 非旧默认值时优先，否则按 video_ratio。
+
+    前端 #1973 总是同时传 video_ratio 与具体分辨率，两者一致；此函数主要服务
+    只传比例的调用方，并保证旧调用（不传比例）维持 1280x720 行为。
+    """
+    width, height = request.output_width, request.output_height
+    ratio = (request.video_ratio or "").strip()
+    if ratio in _VIDEO_RATIO_DIMENSIONS and (width, height) == (1280, 720):
+        return _VIDEO_RATIO_DIMENSIONS[ratio]
+    return width, height
+
+
+def _load_asset_tag_names(db: Session, assets: list, user_id: str) -> dict[str, list[str]]:
+    """叙事模式：查 TagModel 名称，构造 asset_id → 标签名列表（失败返回空 dict 降级随机）。"""
+    try:
+        from packages.adapters.sqlalchemy_impl.models import AssetTagModel, TagModel
+
+        tag_ids = {tid for a in assets for tid in (getattr(a, "tag_ids", None) or [])}
+        if not tag_ids:
+            return {}
+        name_rows = (
+            db.query(TagModel.id, TagModel.name).filter(TagModel.id.in_(tag_ids), TagModel.user_id == user_id).all()
+        )
+        name_by_id = {row.id: row.name for row in name_rows}
+        links = db.query(AssetTagModel.asset_id, AssetTagModel.tag_id).filter(AssetTagModel.tag_id.in_(tag_ids)).all()
+        index: dict[str, list[str]] = {}
+        for asset_id, tag_id in links:
+            name = name_by_id.get(tag_id)
+            if name:
+                index.setdefault(asset_id, []).append(name)
+        return index
+    except Exception:  # noqa: BLE001 - 标签匹配是加分项，查询失败不阻断生成
+        logger.warning("[叙事模式] 素材标签查询失败，降级随机选片", exc_info=True)
+        return {}
+
+
 def _writeback_edit_plan_config(
     plan_id: str,
     task_id: str,
     title_config: dict | None,
     db: Session,
+    dedup_enabled: bool | None = None,
+    video_index: int | None = None,
+    assembly_mode: str | None = None,
+    script_id: str | None = None,
+    video_ratio: str | None = None,
 ) -> None:
     """[已下沉] 路由层兼容别名 → app.services.generation_common.writeback_edit_plan_config。"""
     from app.services.generation_common import writeback_edit_plan_config
 
-    return writeback_edit_plan_config(plan_id, task_id, title_config, db)
+    return writeback_edit_plan_config(
+        plan_id,
+        task_id,
+        title_config,
+        db,
+        dedup_enabled=dedup_enabled,
+        video_index=video_index,
+        assembly_mode=assembly_mode,
+        script_id=script_id,
+        video_ratio=video_ratio,
+    )
 
 
 def _resolve_project_and_library(
@@ -221,16 +303,63 @@ def create_generation_task(
     asset_library_repository: Any = Depends(get_asset_library_repository),
     asset_repository: Any = Depends(get_asset_repository),
     db: Session = Depends(get_db_session),
+    cosyvoice_service: Any = Depends(get_cosyvoice_service),
+    voice_clone_repository: Any = Depends(get_voice_clone_profile_repository),
 ) -> BatchGenerationTaskResponse:
     logger.info(
-        "[生成任务] 接收请求: user_id=%s, template_id=%s, asset_count=%d, mode=%s, count=%d",
+        "[生成任务] 接收请求: user_id=%s, template_id=%s, asset_count=%d, mode=%s, assembly=%s, count=%d",
         authenticated_user.user.id,
         request.template_id,
         len(request.asset_ids),
         request.asset_select_mode,
+        request.assembly_mode,
         request.count,
     )
 
+    # video_ratio → 默认分辨率（显式分辨率优先）
+    request.output_width, request.output_height = _resolve_output_dimensions(request)
+
+    # ── #1970 PR3 叙事模式：入队前同步合成配音并落为 audio asset ──
+    # 合成结果覆盖 voice_library_id（下游按 audio asset id 消费），失败直接 4xx 不入队。
+    narrative_script_tags: list = []
+    if request.assembly_mode == "narrative":
+        from app.config import settings as _settings
+        from app.services.narrative_service import NarrativeError, prepare_narrative_voice
+
+        from packages.adapters.sqlalchemy_impl.tts_job_repository import SQLAlchemyTTSJobRepository
+
+        try:
+            narrative_ctx = prepare_narrative_voice(
+                db=db,
+                user_id=authenticated_user.user.id,
+                script_id=request.script_id,
+                tts_voice_id=request.tts_voice_id,
+                tts_voice_source=request.tts_voice_source,
+                tts_repository=SQLAlchemyTTSJobRepository(db),
+                cosyvoice_service=cosyvoice_service,
+                voice_clone_repository=voice_clone_repository,
+                asset_repository=asset_repository,
+                asset_library_repository=asset_library_repository,
+                project_repository=project_repository,
+                storage_service=get_storage_service(),
+                points_enabled=bool(getattr(_settings, "points_enabled", False)),
+                is_member=bool(getattr(authenticated_user.user, "is_member", False)),
+                member_type=getattr(authenticated_user.user, "member_type", None),
+            )
+        except NarrativeError as e:
+            logger.warning("[叙事模式] 配音前置处理失败: %s", e.message)
+            raise HTTPException(status_code=e.status_code, detail=e.message) from e
+
+        request.voice_library_id = narrative_ctx.voice_asset_id
+        narrative_script_tags = list(getattr(narrative_ctx.script, "tags", None) or [])
+        logger.info(
+            "[叙事模式] 配音已就绪: script_id=%s, tts_job=%s, voice_asset=%s, duration=%.2f",
+            request.script_id,
+            narrative_ctx.tts_job_id,
+            narrative_ctx.voice_asset_id,
+            narrative_ctx.audio_duration,
+        )
+
     try:
         project_id, asset_library_id = _resolve_project_and_library(
             request, project_repository, asset_library_repository, asset_repository, authenticated_user
@@ -256,19 +385,29 @@ def create_generation_task(
 
         # 素材库自动匹配：当未显式指定 asset_ids 时，按模式自动选取
         if not resolved_asset_ids:
+            _tag_index = (
+                _load_asset_tag_names(db, assets, authenticated_user.user.id) if narrative_script_tags else None
+            )
             resolved_asset_ids = _select_assets_from_library(
                 assets,
                 mode=request.asset_select_mode,
                 count=request.asset_select_count,
+                script_tags=narrative_script_tags or None,
+                tag_names_by_id=_tag_index,
             )
-    elif project_id and not resolved_asset_ids and request.asset_select_mode in ("smart",):
-        # 项目级模式：未指定 asset_ids 且选择了 smart 模式时，也自动选取
+    elif project_id and not resolved_asset_ids and (request.asset_select_mode in ("smart",) or narrative_script_tags):
+        # 项目级模式：未指定 asset_ids 且选择了 smart 模式（或叙事模式按标签匹配）时自动选取
         assets = asset_repository.find_by_project(project_id)
         if assets:
+            _tag_index = (
+                _load_asset_tag_names(db, assets, authenticated_user.user.id) if narrative_script_tags else None
+            )
             resolved_asset_ids = _select_assets_from_library(
                 assets,
                 mode=request.asset_select_mode,
                 count=request.asset_select_count,
+                script_tags=narrative_script_tags or None,
+                tag_names_by_id=_tag_index,
             )
             if not resolved_asset_ids:
                 raise HTTPException(
@@ -332,6 +471,10 @@ def create_generation_task(
                             task_id=preview_task.id,
                             title_config=fallback_title_config,
                             db=db,
+                            dedup_enabled=request.dedup_enabled,
+                            assembly_mode=request.assembly_mode,
+                            script_id=request.script_id or None,
+                            video_ratio=request.video_ratio or None,
                         )
 
                     logger.info(
@@ -476,9 +619,12 @@ def create_generation_task(
             variant_plan_ids.append(_plan0.id)
 
             # #1855 P0：批次区间避让表，从变体0实际clips构建初始值（公共函数）
+            from app.services.generation_common import collect_plan_atom_clip_ids as _collect_atom_ids
             from app.services.generation_common import collect_plan_segments as _collect_segments
 
             _batch_segments = _collect_segments(_plan0.id, _plan_svc._clip_repo)
+            # #1970：批次内原子片段硬避让集合
+            _batch_atom_ids: list[str] = _collect_atom_ids(_plan0.id, _plan_svc._clip_repo)
 
             # 变体 1..N-1 独立选片（传入累积batch_segments做素材区间避让）
             for task_index in range(1, count):
@@ -493,6 +639,7 @@ def create_generation_task(
                             name_suffix=f"批量{task_index + 1}",
                             voice_duration=voice_durations[task_index] if task_index < len(voice_durations) else 0.0,
                             batch_segments=_batch_segments,
+                            batch_used_atom_ids=_batch_atom_ids,
                         )
                         break
                     except ValueError as ve:
@@ -529,6 +676,8 @@ def create_generation_task(
                     _new_segs = _collect_segments(variant.id, _plan_svc._clip_repo)
                     for _aid, _ivs in _new_segs.items():
                         _batch_segments.setdefault(_aid, []).extend(_ivs)
+                    # #1970：同步累积原子片段ID
+                    _batch_atom_ids.extend(_collect_atom_ids(variant.id, _plan_svc._clip_repo))
                 except Exception:
                     logger.exception("[生成任务] 变体%d 区间收集失败（不阻断）", task_index)
 
@@ -672,6 +821,11 @@ def create_generation_task(
                         task_id=task.id,
                         title_config=variant_title_config,
                         db=db,
+                        dedup_enabled=request.dedup_enabled,
+                        video_index=task_index,
+                        assembly_mode=request.assembly_mode,
+                        script_id=request.script_id or None,
+                        video_ratio=request.video_ratio or None,
                     )
 
                 if safe_enqueue_generation_task(
@@ -762,6 +916,7 @@ def confirm_generation(
             generation_task_repository.update(source_task)
 
             # 同步标题到 EditPlan.config
+            # #1970：确认生成复用预览计划，dedup_enabled 沿用计划已有值，不在此覆盖
             if confirmed_title_config and source_task.source_edit_plan_id:
                 _writeback_edit_plan_config(
                     plan_id=source_task.source_edit_plan_id,

apps/api/app/api/routes/gpu_lipsync.py

@@ -0,0 +1,231 @@
+"""GPU MuseTalk Worker 反向轮询路由 — /api/v1/gpu/lipsync/*.
+
+仅面向部署在用户 RTX2060 本地的 GPU Worker 脚本，不面向前端用户。
+鉴权方式：长期 API Token（`Authorization: Bearer <GPU_WORKER_TOKEN>`），不走用户 JWT。
+
+接口：
+  POST  /api/v1/gpu/register              Worker 注册/心跳
+  GET   /api/v1/gpu/lipsync/poll          Worker 轮询拉任务（无任务返回 204）
+  POST  /api/v1/gpu/lipsync/result        Worker multipart 上传结果视频/上报失败
+  GET   /api/v1/gpu/lipsync/status/{id}   业务侧查询任务状态（内部接口，暂开放给登录用户）
+"""
+
+from __future__ import annotations
+
+import logging
+import tempfile
+from datetime import UTC, datetime
+from pathlib import Path
+from typing import Optional
+
+import requests
+from app.core.storage import get_storage_service
+from app.dependencies import get_db_session
+from app.schemas.gpu_lipsync import (
+    GpuLipsyncPollResponse,
+    GpuLipsyncResultResponse,
+    GpuLipsyncStatusResponse,
+    GpuLipsyncTaskPayload,
+    GpuWorkerRegisterRequest,
+    GpuWorkerRegisterResponse,
+)
+from app.services.gpu_lipsync_service import GpuLipsyncService
+from fastapi import (
+    APIRouter,
+    Depends,
+    File,
+    Form,
+    HTTPException,
+    Query,
+    Request,
+    UploadFile,
+    status,
+)
+from fastapi.responses import Response
+from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
+
+from packages.config import get_api_settings
+
+logger = logging.getLogger(__name__)
+
+router = APIRouter()
+
+# 复用 bearer scheme 抽 Token，但不校验用户 JWT
+_gpu_bearer = HTTPBearer(auto_error=False)
+
+
+def _verify_gpu_token(
+    credentials: Optional[HTTPAuthorizationCredentials] = Depends(_gpu_bearer),
+) -> str:
+    """校验 GPU Worker Token，返回 worker 提供的 token 串（仅用于日志，不做身份识别）.
+
+    - development 且未配置 token → 直接放行（方便本地调试）。
+    - production/staging 未配置 token → 拒绝（避免裸奔）。
+    - token 不匹配 → 401。
+    """
+    settings = get_api_settings()
+    expected = (settings.gpu_worker_token or "").strip()
+    is_dev = settings.environment == "development"
+    if not expected:
+        if is_dev:
+            return credentials.credentials if credentials else ""
+        raise HTTPException(
+            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
+            detail="GPU_WORKER_TOKEN not configured on server",
+        )
+    if credentials is None or credentials.scheme.lower() != "bearer":
+        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Missing bearer token")
+    if credentials.credentials != expected:
+        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid GPU worker token")
+    return credentials.credentials
+
+
+def _get_svc(db=Depends(get_db_session)) -> GpuLipsyncService:
+    return GpuLipsyncService(db)
+
+
+# ── POST /register — Worker 注册/心跳 ──────────────────────────────
+
+
+@router.post("/register", response_model=GpuWorkerRegisterResponse)
+def register_worker(
+    body: GpuWorkerRegisterRequest,
+    svc: GpuLipsyncService = Depends(_get_svc),
+    _token: str = Depends(_verify_gpu_token),
+):
+    svc.register_worker(
+        worker_id=body.worker_id,
+        hostname=body.hostname,
+        gpu_name=body.gpu_name,
+        free_vram_mb=body.free_vram_mb,
+        capabilities=body.capabilities,
+        task_id=body.task_id,
+    )
+    return GpuWorkerRegisterResponse(ok=True, server_time=datetime.now(UTC), message="ok")
+
+
+# ── GET /lipsync/poll — Worker 轮询拉任务 ─────────────────────────
+
+
+@router.get("/lipsync/poll")
+def poll_task(
+    worker_id: str = Query(..., min_length=1, max_length=100, description="Worker 唯一 ID"),
+    svc: GpuLipsyncService = Depends(_get_svc),
+    _token: str = Depends(_verify_gpu_token),
+):
+    task = svc.poll_task(worker_id=worker_id)
+    if task is None:
+        return Response(status_code=status.HTTP_204_NO_CONTENT)
+    payload = GpuLipsyncTaskPayload(
+        task_id=task.id,
+        video_url=getattr(task, "_signed_video_url", task.video_url),
+        audio_url=getattr(task, "_signed_audio_url", task.audio_url),
+        lipsync_job_id=task.lipsync_job_id or "",
+        user_id=task.user_id or "",
+        project_id=task.project_id or "",
+        created_at=task.created_at,
+        upload_url=getattr(task, "_signed_upload_url", ""),
+        upload_method="PUT",
+        expires_at=getattr(task, "_upload_expires_at", datetime.now(UTC)),
+    )
+    return GpuLipsyncPollResponse(task=payload)
+
+
+# ── POST /lipsync/result — Worker 上报结果（multipart） ─────────────
+
+
+@router.post("/lipsync/result", response_model=GpuLipsyncResultResponse)
+async def report_result(
+    request: Request,
+    task_id: str = Form(...),
+    worker_id: str = Form(...),
+    success: bool = Form(True),
+    duration_seconds: float = Form(0.0),
+    error_msg: str = Form(""),
+    result: Optional[UploadFile] = File(None),
+    svc: GpuLipsyncService = Depends(_get_svc),
+    _token: str = Depends(_verify_gpu_token),
+):
+    # 参数校验：
+    # - success=true + result 文件 → API 代为上传到 OSS（方便 Worker 端实现）
+    # - success=true + 无文件 → Worker 已经自己 PUT 到预签名 upload_url，直接确认
+    # - success=false → 不上传文件，错误信息通过 error_msg 传递
+    if success and result is not None:
+        # 把文件落盘到临时目录，然后 PUT 到预签名 URL
+        storage = get_storage_service()
+        result_key = svc._result_key(task_id)
+        upload_url = storage.get_upload_url(result_key, expires_seconds=3600, content_type="video/mp4")
+        try:
+            with tempfile.TemporaryDirectory(prefix="gpu_result_") as tmpdir:
+                tmp_path = Path(tmpdir) / "result.mp4"
+                content = await result.read()
+                if not content:
+                    raise HTTPException(status_code=400, detail="上传的 result 文件为空")
+                tmp_path.write_bytes(content)
+                headers = {"Content-Type": "video/mp4"}
+                with open(tmp_path, "rb") as f:
+                    resp = requests.put(upload_url, data=f, headers=headers, timeout=300)
+                if resp.status_code >= 400:
+                    logger.error(
+                        "上传 GPU 结果到 OSS 失败: status=%d body=%s",
+                        resp.status_code,
+                        resp.text[:500],
+                    )
+                    raise HTTPException(
+                        status_code=502,
+                        detail=f"上传结果视频到 OSS 失败 (HTTP {resp.status_code})",
+                    )
+        except HTTPException:
+            raise
+        except Exception as exc:
+            logger.exception("上传 GPU 结果视频异常: %s", exc)
+            raise HTTPException(status_code=500, detail=f"上传结果视频异常: {exc}") from exc
+    elif not success:
+        # 失败时忽略 result 文件（即便传了也没用）
+        pass
+    # 其他情况：success=true 且无文件 → Worker 已自行 PUT 到预签名 URL，直接标记完成
+
+    try:
+        task = svc.report_result(
+            task_id=task_id,
+            worker_id=worker_id,
+            success=success,
+            duration_seconds=duration_seconds,
+            error_msg=error_msg,
+        )
+    except KeyError as exc:
+        raise HTTPException(status_code=404, detail=str(exc)) from exc
+    return GpuLipsyncResultResponse(
+        ok=True,
+        task_id=task.id,
+        status=task.status,
+        message="ok",
+    )
+
+
+# ── GET /lipsync/status/{task_id} — 业务侧查询状态 ─────────────────
+# 说明：此接口会被 lipsync_service 内部在业务流程里直接读 DB，不通过 HTTP。
+# 但仍暴露一个简单查询接口，方便调试和前端轮询（如后续需要）。暂不做用户权限校验，
+# task_id 本身是 UUID，不可枚举。
+
+
+@router.get("/lipsync/status/{task_id}", response_model=GpuLipsyncStatusResponse)
+def get_task_status(
+    task_id: str,
+    svc: GpuLipsyncService = Depends(_get_svc),
+):
+    task = svc.get_task(task_id)
+    if task is None:
+        raise HTTPException(status_code=404, detail="task not found")
+    return GpuLipsyncStatusResponse(
+        task_id=task.id,
+        status=task.status,
+        result_url=task.result_url,
+        result_duration=task.result_duration,
+        error_msg=task.error_msg,
+        worker_id=task.worker_id,
+        attempt=task.attempt,
+        created_at=task.created_at,
+        started_at=task.started_at,
+        finished_at=task.finished_at,
+    )

apps/api/app/api/routes/scripts_ai.py

@@ -55,7 +55,9 @@ _DOUYIN_DEBUG_ERRORS = os.environ.get("DOUYIN_DEBUG_ERRORS", "").lower() in (
     "1",
     "true",
     "yes",
-) or os.environ.get("APP_ENV", "").lower() in ("staging", "dev", "development", "test")
+) or os.environ.get(
+    "APP_ENV", ""
+).lower() in ("staging", "dev", "development", "test")
 
 _TAIL_PUNCT = ".,;:!?，。；：！？)）]》" + chr(34) + chr(39) + "<>"
 _URL_EXTRACT_RE = re.compile(r"https?://\S+", re.IGNORECASE)
@@ -140,6 +142,7 @@ def _extract_and_validate_douyin_url(raw_input):
 
 def _mk_post_json(self, path, payload):
     import httpx
+
     if not self.is_available:
         raise MediaKitError("MediaKit API Key 未配置", code="NotConfigured")
     url = self._base_url + path
@@ -168,6 +171,7 @@ def _mk_post_json(self, path, payload):
 
 def _mk_get_json(self, path):
     import httpx
+
     if not self.is_available:
         raise MediaKitError("MediaKit API Key 未配置", code="NotConfigured")
     url = self._base_url + path
@@ -283,7 +287,7 @@ def _direct_url_download_and_local_asr(direct_url, page_url, temp_dir):
         raise
     except httpx.TimeoutException:
         logger.warning("直链下载超时: %s", page_url)
-        raise HTTPException(status_code=status.HTTP_504_GATEWAY_TIMEOUT, detail="视频下载超时，请稍后重试")
+        raise HTTPException(status_code=status.HTTP_504_GATEWAY_TIMEOUT, detail="视频下载超时，请稍后重试") from None
     except Exception as exc:  # noqa: BLE001
         logger.exception("直链下载失败: url=%s err=%s", page_url, exc)
         raise HTTPException(status_code=status.HTTP_502_BAD_GATEWAY, detail="视频下载失败: " + str(exc)[:200]) from exc
@@ -420,7 +424,10 @@ def extract_from_douyin(
             if text:
                 logger.info(
                     "抖音 MediaKit ASR 成功: source=%s text_len=%d duration=%.1f total_time=%.1fs",
-                    result.source, len(text), duration, time.time() - t0,
+                    result.source,
+                    len(text),
+                    duration,
+                    time.time() - t0,
                 )
             else:
                 logger.info("抖音 MediaKit ASR 返回空文本（无旁白/BGM视频）")
@@ -440,13 +447,25 @@ def extract_from_douyin(
                 if text:
                     logger.info(
                         "抖音本地 ASR 成功: source=%s text_len=%d total_time=%.1fs",
-                        result.source, len(text), time.time() - t0,
+                        result.source,
+                        len(text),
+                        time.time() - t0,
                     )
                     last_err_stage = "asr"
-        except HTTPException:
-            raise
+        except HTTPException as exc:
+            # 下载超时（504）是明确的网络错误，直接抛出
+            if exc.status_code == status.HTTP_504_GATEWAY_TIMEOUT:
+                raise
+            # 本地 ASR 不可用/失败（502/503）时记录后继续走 desc 兜底，
+            # 不直接抛 502，避免 API 镜像缺 worker 模块时整条链路挂掉
+            logger.warning("本地 ASR 链路失败(status=%d): %s", exc.status_code, exc.detail)
+            text = ""
+            # 如果是下载失败（非ASR错误），保持stage为download
+            if "语音识别" in str(exc.detail) or "ASR" in str(exc.detail):
+                last_err_stage = "asr"
         except Exception as exc:  # noqa: BLE001
             logger.warning("本地 ASR 链路异常: %s", exc)
+            text = ""
 
     # ── Phase C：结果判定 & 兜底 ──
 
@@ -529,6 +548,7 @@ def ai_generate_titles(
         raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="文案内容不能为空")
     count = max(1, min(5, request.count))
     from app.services.ai_service import generate_smart_titles
+
     result = generate_smart_titles(description=content, style="viral", count=count)
     titles = result.get("titles", [])[:count]
     return AiGenerateTitlesResponse(titles=titles)

apps/api/app/schemas/generation_task.py

@@ -98,6 +98,24 @@ class CreateGenerationTaskRequest(BaseModel):
         description="各变体独立标题文字数组：长度1=共用，长度=count=独立。为空时使用 title_config.text",
     )
 
+    # ── 智能降重开关（#1970）──
+    # True（默认）：edge_crop + 片段级微变换（hflip/变速/亮度/对比度/饱和度/BGM偏移）全部生效；
+    # False：跳过 edge_crop、不注入微变换，渲染确定性（固定种子）。
+    dedup_enabled: bool = Field(default=True, description="智能降重开关，默认开启；关闭后跳过边缘裁切与微变换")
+
+    # ── 剪辑组装模式（#1970 PR3）──
+    # random（默认，完全兼容现有随机混剪）/ narrative（叙事剪辑：文案→TTS 配音→标签匹配画面）
+    assembly_mode: str = Field(default="random", description="组装模式：random=随机混剪（默认），narrative=叙事剪辑")
+    # 叙事模式必填：文案库 scripts.id（后端据此读取 content 合成 TTS）
+    script_id: str = Field(default="", description="叙事模式必填：文案库 ID")
+    # 叙事模式必填：TTS 音色 ID（preset 为 CosyVoice 音色 id；clone 为克隆档案 id）
+    tts_voice_id: str = Field(default="", description="叙事模式必填：TTS 音色 ID（系统音色或克隆档案 ID）")
+    tts_voice_source: str = Field(default="preset", description="TTS 音色来源：preset=系统预设（默认），clone=克隆音色")
+    # 视频比例：当前前端 9:16/16:9；与 output_width/output_height 并存，传了具体分辨率时以分辨率为准
+    video_ratio: str = Field(
+        default="", description="视频比例，如 9:16（默认竖屏）/16:9；与显式分辨率冲突时以分辨率为准"
+    )
+
     @model_validator(mode="after")
     def _check_variant_arrays(self) -> "CreateGenerationTaskRequest":
         """变体数组字段长度校验 + #1749 配音严格守卫。
@@ -127,6 +145,26 @@ class CreateGenerationTaskRequest(BaseModel):
             raise ValueError(f"variant_plan_ids 长度({len(self.variant_plan_ids)})必须与 count({self.count})一致")
         return self
 
+    @model_validator(mode="after")
+    def _check_assembly_mode(self) -> "CreateGenerationTaskRequest":
+        """#1970 组装模式与叙事模式入参校验。"""
+        if self.assembly_mode not in ("random", "narrative"):
+            raise ValueError("assembly_mode 仅支持 'random'（默认）或 'narrative'")
+        if self.tts_voice_source not in ("preset", "clone"):
+            raise ValueError("tts_voice_source 仅支持 'preset' 或 'clone'")
+        if self.video_ratio:
+            parts = self.video_ratio.split(":")
+            if len(parts) != 2 or not all(p.isdigit() and int(p) > 0 for p in parts):
+                raise ValueError("video_ratio 格式必须为 '宽:高'，如 9:16 或 16:9")
+            if self.video_ratio not in ("9:16", "16:9", "1:1", "3:4", "4:3"):
+                raise ValueError("video_ratio 仅支持 9:16 / 16:9 / 1:1 / 3:4 / 4:3")
+        if self.assembly_mode == "narrative":
+            if not self.script_id.strip():
+                raise ValueError("叙事模式（narrative）必须提供 script_id（文案库 ID）")
+            if not self.tts_voice_id.strip():
+                raise ValueError("叙事模式（narrative）必须提供 tts_voice_id（TTS 音色 ID）")
+        return self
+
     @model_validator(mode="after")
     def _check_at_least_one_mode(self) -> "CreateGenerationTaskRequest":
         has_project = bool(self.project_id.strip())

apps/api/app/schemas/gpu_lipsync.py

@@ -0,0 +1,111 @@
+"""GPU MuseTalk 反向轮询 API Schema 定义.
+
+面向部署在用户 RTX2060 本地的 GPU Worker 脚本，不面向前端用户。
+Worker 用长期 GPU_WORKER_TOKEN 鉴权（不是用户 JWT）。
+"""
+
+from __future__ import annotations
+
+from datetime import datetime
+from typing import Optional
+
+from pydantic import BaseModel, Field
+
+# ── Worker 注册/心跳 ──────────────────────────────────────────────
+
+
+class GpuWorkerRegisterRequest(BaseModel):
+    """Worker 启动/心跳时上报自身信息."""
+
+    worker_id: str = Field(..., min_length=1, max_length=100, description="Worker 唯一 ID（机器名+UUID 等）")
+    hostname: str = Field("", max_length=200, description="主机名，用于运维排查")
+    gpu_name: str = Field("", max_length=200, description="GPU 型号，如 'NVIDIA GeForce RTX 2060'")
+    free_vram_mb: int = Field(0, ge=0, description="当前空闲显存（MB）")
+    capabilities: str = Field("musetalk", max_length=500, description="能力列表，逗号分隔，如 'musetalk'")
+    task_id: Optional[str] = Field(
+        None,
+        max_length=64,
+        description=(
+            "当前正在处理的任务 ID。Worker 推理期间定期心跳时携带，"
+            "服务端同步刷新该任务 last_heartbeat_at，防止长推理被误判超时；空闲时不传"
+        ),
+    )
+
+
+class GpuWorkerRegisterResponse(BaseModel):
+    ok: bool = True
+    server_time: datetime
+    message: str = "ok"
+
+
+# ── 轮询任务 ────────────────────────────────────────────────────
+
+
+class GpuLipsyncTaskPayload(BaseModel):
+    """下发给 Worker 的任务载荷（含预签名下载 URL）."""
+
+    task_id: str
+    video_url: str = Field(..., description="人物视频预签名下载 URL（GET）")
+    audio_url: str = Field(..., description="驱动音频预签名下载 URL（GET）")
+    lipsync_job_id: str = ""
+    user_id: str = ""
+    project_id: str = ""
+    created_at: datetime
+    upload_url: str = Field(..., description="结果视频预签名上传 URL（PUT, video/mp4）")
+    upload_method: str = Field("PUT", description="上传方式，目前只支持 PUT")
+    expires_at: datetime
+
+
+class GpuLipsyncPollResponse(BaseModel):
+    """Worker poll 的返回：200 带任务，204 无任务."""
+
+    task: Optional[GpuLipsyncTaskPayload] = None
+
+
+# ── Worker 上报结果 ──────────────────────────────────────────────
+
+
+class GpuLipsyncResultRequest(BaseModel):
+    """Worker 通过 multipart 上传结果时携带的字段（非文件字段）."""
+
+    task_id: str = Field(..., min_length=1, max_length=64)
+    worker_id: str = Field(..., min_length=1, max_length=100)
+    success: bool = Field(True, description="true=成功（此时必须上传 result 视频文件）；false=失败")
+    duration_seconds: float = Field(0.0, ge=0, description="合成后视频时长（秒），成功时应填入")
+    error_msg: str = Field("", max_length=2000, description="失败原因，success=false 时必填")
+
+
+class GpuLipsyncResultResponse(BaseModel):
+    ok: bool = True
+    task_id: str
+    status: str  # done / failed
+    message: str = "ok"
+
+
+# ── 业务侧查询任务状态 ────────────────────────────────────────────
+
+
+class GpuLipsyncStatusResponse(BaseModel):
+    task_id: str
+    status: str
+    result_url: str = ""
+    result_duration: float = 0.0
+    error_msg: str = ""
+    worker_id: str = ""
+    attempt: int = 0
+    created_at: datetime
+    started_at: Optional[datetime] = None
+    finished_at: Optional[datetime] = None
+
+
+# ── 创建任务（内部服务调用） ──────────────────────────────────────
+
+
+class GpuLipsyncCreateRequest(BaseModel):
+    """服务层内部创建 GPU 任务用（不通过 HTTP 暴露给 Worker/前端）."""
+
+    video_url: str  # 已可访问的 OSS key 或公网 URL（API 侧会转预签名）
+    audio_url: str
+    lipsync_job_id: str = ""
+    user_id: str = ""
+    project_id: str = ""

apps/api/app/services/douyin_resolver.py

@@ -52,7 +52,7 @@ def _extract_url_from_text(text: str) -> str:
     if not text:
         return ""
     m = re.search(r"https?://\S+", text)
-    return m.group(0).rstrip("。，！？!?,，；;\"'）)】") if m else ""
+    return m.group(0).rstrip("。，！？!?,，；;\"'）)】") if m else ""  # noqa: B005
 
 
 def _canonicalize_url(url: str, timeout: int = 8) -> str:

apps/api/app/services/edit_plan_service.py

@@ -423,6 +423,7 @@ class EditPlanService:
                     clip_type=clip.clip_type,
                     order=clip.order,
                     asset_id=clip.asset_id,
+                    atom_clip_id=clip_item.get("atom_clip_id", ""),
                     text_content=clip.text_content,
                     start_time=clip.start_time,
                     duration=clip.duration,
@@ -474,6 +475,7 @@ class EditPlanService:
         voice_duration: float = 0.0,
         rng=None,
         batch_segments: dict[str, list[tuple[float, float]]] | None = None,
+        batch_used_atom_ids: set[str] | list[str] | None = None,
     ) -> EditPlan:
         """为批量变体生成独立 plan：完整重跑单视频选片流程（#1743）。
 
@@ -608,18 +610,69 @@ class EditPlanService:
                     st = float(c.start_time or 0.0)
                     batch_segments_resolved.setdefault(c.asset_id, []).append((st, st + float(c.duration)))
 
-        clips_data = reselect_clips_for_variant(
-            source_clips_data,
-            pool_ids,
-            asset_durations=durations,
-            asset_scene_points=scene_points,
-            historical_used_segments=historical,
-            batch_segments=batch_segments_resolved,
-            target_durations=target_durations,
-            rng=rng,
-        )
+        clips_data = None
+        # #1970 原子片段级变体重选：候选素材已切片时优先按原子片段选片
+        try:
+            from packages.adapters.sqlalchemy_impl.asset_atom_clip_repository import (
+                SQLAlchemyAssetAtomClipRepository,
+            )
+            from packages.domain.atom_clip_resolver import flatten_candidates, load_atom_clips_for_assets
+            from packages.domain.atom_clip_selector import reselect_clips_from_atoms
 
-        # 片段区间写回素材 metadata（与落库同事务；replace_all_clips_transactional 内 commit）
+            atom_repo = SQLAlchemyAssetAtomClipRepository(db)
+
+            # 兜底切片只需要时长；本方法已查出 durations，封装一个只读假素材仓储
+            class _DurationOnlyAssetRepo:
+                def __init__(self, durations_map: dict[str, float]) -> None:
+                    self._durations = durations_map
+
+                def get(self, asset_id: str):
+                    if asset_id not in self._durations:
+                        return None
+
+                    class _A:
+                        pass
+
+                    a = _A()
+                    a.duration = self._durations[asset_id]
+                    return a
+
+            clips_by_asset = load_atom_clips_for_assets(
+                pool_ids,
+                atom_clip_repo=atom_repo,
+                asset_repo=_DurationOnlyAssetRepo(durations),
+            )
+            atom_candidates = flatten_candidates(clips_by_asset)
+            if atom_candidates:
+                # 历史成片已用原子片段（降权）；批次内前序变体已用（硬避让）
+                historical_atom_ids = set(
+                    self._clip_repo.list_recent_atom_clip_ids_by_user(
+                        created_by_user_id or source.created_by_user_id or "",
+                        limit=200,
+                    )
+                )
+                clips_data = reselect_clips_from_atoms(
+                    source_clips_data,
+                    atom_candidates,
+                    historical_atom_ids=historical_atom_ids,
+                    batch_used_atom_ids=(set(batch_used_atom_ids) if batch_used_atom_ids else None),
+                    rng=rng,
+                )
+        except Exception:
+            logger.warning("原子片段变体重选失败，回退整条素材选片", exc_info=True)
+            clips_data = None
+
+        if clips_data is None:
+            clips_data = reselect_clips_for_variant(
+                source_clips_data,
+                pool_ids,
+                asset_durations=durations,
+                asset_scene_points=scene_points,
+                historical_used_segments=historical,
+                batch_segments=batch_segments_resolved,
+                target_durations=target_durations,
+                rng=rng,
+            )  # 片段区间写回素材 metadata（与落库同事务；replace_all_clips_transactional 内 commit）
         for item in clips_data:
             aid = item.get("asset_id", "")
             if aid:

apps/api/app/services/generation_common.py

@@ -61,10 +61,17 @@ def writeback_edit_plan_config(
     task_id: str,
     title_config: dict | None,
     db: Session,
+    dedup_enabled: bool | None = None,
+    video_index: int | None = None,
+    assembly_mode: str | None = None,
+    script_id: str | None = None,
+    video_ratio: str | None = None,
 ) -> None:
     """任务入队成功后，回写 EditPlan.config：generation_task_id + title_config。
 
     用 merge 方式更新，不整体覆盖 config，避免丢失其他字段。
+    #1970：dedup_enabled 非 None 时一并写入，worker 据此决定 edge_crop/微变换；
+    PR3 叙事模式再写 assembly_mode/script_id/video_ratio（可追溯，不影响渲染）。
     失败只记日志，不影响任务创建。
     """
     if not plan_id:
@@ -80,6 +87,16 @@ def writeback_edit_plan_config(
         current_config = plan_model.config if isinstance(plan_model.config, dict) else {}
         merged = dict(current_config)
         merged["generation_task_id"] = task_id
+        if dedup_enabled is not None:
+            merged["dedup_enabled"] = bool(dedup_enabled)
+        if video_index is not None:
+            merged["video_index"] = int(video_index)
+        if assembly_mode:
+            merged["assembly_mode"] = assembly_mode
+        if script_id:
+            merged["script_id"] = script_id
+        if video_ratio:
+            merged["video_ratio"] = video_ratio
 
         if title_config:
             # #1901 统一字段名为 "title"（worker sync_configs_to_plan 写的是 "title"）
@@ -157,6 +174,33 @@ def collect_plan_segments(
     return segs
 
 
+def collect_plan_atom_clip_ids(
+    plan_id: str,
+    clip_repo: Any,
+    *,
+    page_size: int = 500,
+) -> list[str]:
+    """分页读取 plan 所有 clips，收集已选用的原子片段 ID（#1970）。
+
+    用于批量变体间原子片段级硬避让：同一原子片段在同批次内只用一次。
+    旧路径 clips 的 atom_clip_id 为空串，自动忽略。
+    """
+    ids: list[str] = []
+    sk, pg = 0, page_size
+    while True:
+        batch = clip_repo.list_by_plan(plan_id, skip=sk, limit=pg)
+        if not batch:
+            break
+        for c in batch:
+            acid = getattr(c, "atom_clip_id", "") or ""
+            if acid:
+                ids.append(acid)
+        if len(batch) < pg:
+            break
+        sk += pg
+    return ids
+
+
 def resolve_latest_plan_by_template(
     db: Session,
     *,

apps/api/app/services/gpu_lipsync_service.py

@@ -0,0 +1,382 @@
+"""GPU MuseTalk 口型同步服务 — 反向轮询模式.
+
+职责：
+1. 创建任务（由 lipsync 业务流程调用），为输入/输出生成预签名 URL，任务入队；
+2. Worker 心跳注册（register）：登记/刷新 worker 状态；
+3. Worker 轮询拉任务（poll）：原子地 CLAIM 一条 pending 任务，返回预签名 URL；
+4. Worker 上报结果（report_result）：标记 done/failed，失败可重试；
+5. 业务侧查询状态（get_status）。
+"""
+
+from __future__ import annotations
+
+import logging
+import uuid
+from datetime import UTC, datetime, timedelta
+from typing import Optional
+
+from app.core.storage import get_storage_service
+from sqlalchemy.orm import Session
+
+from packages.adapters.sqlalchemy_impl.models import GpuLipsyncTaskModel, GpuWorkerModel
+from packages.config import get_api_settings
+
+logger = logging.getLogger(__name__)
+
+# 任务在 processing 超过此时长仍未完成 → 超时回退 pending 或置 failed
+MAX_ATTEMPTS = 3
+
+
+class GpuLipsyncService:
+    """GPU 口型同步服务（无状态方法，每次调用从 DI 拿 db/storage）."""
+
+    RESULT_PREFIX = "gpu-lipsync/results/"
+    INPUT_SIGN_EXPIRES_PAD = 600  # 输入预签名 URL 在任务超时基础上再加 10min 余量
+
+    # ── 公共入口 ────────────────────────────────────────────────────
+
+    def __init__(self, db: Session):
+        self.db = db
+        self.settings = get_api_settings()
+        self.storage = get_storage_service()
+
+    # ── Worker 注册/心跳 ────────────────────────────────────────────
+
+    def register_worker(
+        self,
+        worker_id: str,
+        hostname: str = "",
+        gpu_name: str = "",
+        free_vram_mb: int = 0,
+        capabilities: str = "musetalk",
+        task_id: Optional[str] = None,
+    ) -> GpuWorkerModel:
+        """Worker 注册/心跳。
+
+        task_id 非空时（Worker 推理期间的任务级心跳），同步把对应 processing
+        任务的 last_heartbeat_at 续到当前时间，使长推理不会被
+        ``_recover_timed_out_tasks`` 误回退。任务已结束 / 不属于该 worker
+        （如已被超时回收重新派发）时忽略，不报错。
+        """
+        now = datetime.now(UTC)
+        worker = self.db.query(GpuWorkerModel).filter(GpuWorkerModel.worker_id == worker_id).one_or_none()
+        if worker is None:
+            worker = GpuWorkerModel(
+                worker_id=worker_id,
+                hostname=hostname,
+                gpu_name=gpu_name,
+                free_vram_mb=free_vram_mb,
+                capabilities=capabilities,
+                last_heartbeat_at=now,
+                created_at=now,
+            )
+            self.db.add(worker)
+        else:
+            worker.hostname = hostname or worker.hostname
+            worker.gpu_name = gpu_name or worker.gpu_name
+            worker.free_vram_mb = free_vram_mb
+            worker.capabilities = capabilities or worker.capabilities
+            worker.last_heartbeat_at = now
+        if task_id:
+            self._touch_task_heartbeat(task_id, worker_id, now)
+        self.db.commit()
+        return worker
+
+    # ── 轮询拉任务（Worker 调用） ──────────────────────────────────
+
+    def poll_task(self, worker_id: str) -> Optional[GpuLipsyncTaskModel]:
+        """原子地认领一条最早的 pending 任务，返回给 worker；无任务返回 None.
+
+        同时会：
+        - 把 processing 状态且真正超时（任务心跳停滞超过
+          gpu_task_timeout_seconds；Worker 推理期会通过 register(task_id=...)
+          续心跳，长推理不会误判）的任务回退为 pending（attempt++，超过
+          MAX_ATTEMPTS 置 failed），让其它 worker 认领。
+        - 刷新 worker 心跳。
+        """
+        now = datetime.now(UTC)
+        self._recover_timed_out_tasks(now)
+        # 更新 worker 心跳
+        self._touch_worker(worker_id, now)
+
+        # 选一条最早 pending 任务（FOR UPDATE SKIP LOCKED 语义：简单起见先查再锁状态）
+        task = (
+            self.db.query(GpuLipsyncTaskModel)
+            .filter(GpuLipsyncTaskModel.status == "pending")
+            .order_by(GpuLipsyncTaskModel.created_at.asc())
+            .first()
+        )
+        if task is None:
+            self.db.commit()
+            return None
+
+        # 原子 claim：用 UPDATE WHERE status=pending 避免并发
+        upd_rows = (
+            self.db.query(GpuLipsyncTaskModel)
+            .filter(
+                GpuLipsyncTaskModel.id == task.id,
+                GpuLipsyncTaskModel.status == "pending",
+            )
+            .update(
+                {
+                    GpuLipsyncTaskModel.status: "processing",
+                    GpuLipsyncTaskModel.worker_id: worker_id,
+                    GpuLipsyncTaskModel.started_at: now,
+                    GpuLipsyncTaskModel.last_heartbeat_at: now,
+                    GpuLipsyncTaskModel.attempt: GpuLipsyncTaskModel.attempt + 1,
+                    GpuLipsyncTaskModel.updated_at: now,
+                },
+                synchronize_session=False,
+            )
+        )
+        self.db.commit()
+        if upd_rows == 0:
+            # 被其它 worker 抢先了
+            return None
+        self.db.refresh(task)
+        # 生成预签名输入/输出 URL（在 claim 时动态生成，避免长时间过期）
+        expires = self.settings.gpu_task_timeout_seconds + self.INPUT_SIGN_EXPIRES_PAD
+        task._signed_video_url = self.storage.get_download_url(task.video_url, expires_seconds=expires)
+        task._signed_audio_url = self.storage.get_download_url(task.audio_url, expires_seconds=expires)
+        task._signed_upload_url = self.storage.get_upload_url(
+            self._result_key(task.id),
+            expires_seconds=expires,
+            content_type="video/mp4",
+        )
+        task._upload_expires_at = now + timedelta(seconds=expires)
+        return task
+
+    # ── 上报结果 ──────────────────────────────────────────────────
+
+    def report_result(
+        self,
+        task_id: str,
+        worker_id: str,
+        success: bool,
+        duration_seconds: float = 0.0,
+        error_msg: str = "",
+    ) -> GpuLipsyncTaskModel:
+        task = self.db.get(GpuLipsyncTaskModel, task_id)
+        if task is None:
+            raise KeyError(f"task {task_id} not found")
+        now = datetime.now(UTC)
+        if success:
+            task.status = "done"
+            task.result_url = self._result_key(task_id)
+            task.result_duration = duration_seconds or 0.0
+            task.error_msg = ""
+            task.finished_at = now
+        else:
+            # 失败：若仍可重试（已尝试次数 < MAX_ATTEMPTS）→ 回退 pending；否则 → failed
+            if task.attempt < MAX_ATTEMPTS:
+                task.status = "pending"
+                task.worker_id = ""
+                task.started_at = None
+                task.error_msg = error_msg[:2000]
+                logger.warning(
+                    "GPU 任务 %s 在 worker %s 上失败，回退 pending 等待重试（attempt=%d）: %s",
+                    task_id,
+                    worker_id,
+                    task.attempt,
+                    error_msg[:200],
+                )
+            else:
+                task.status = "failed"
+                task.error_msg = error_msg[:2000]
+                task.finished_at = now
+                logger.error(
+                    "GPU 任务 %s 失败达到最大重试次数 %d，置为 failed: %s",
+                    task_id,
+                    MAX_ATTEMPTS,
+                    error_msg[:200],
+                )
+        task.updated_at = now
+        task.last_heartbeat_at = now
+        self._touch_worker(worker_id, now)
+        self.db.commit()
+        self.db.refresh(task)
+        return task
+
+    # ── 业务侧查询 ────────────────────────────────────────────────
+
+    def get_task(self, task_id: str) -> Optional[GpuLipsyncTaskModel]:
+        return self.db.get(GpuLipsyncTaskModel, task_id)
+
+    def get_by_lipsync_job(self, lipsync_job_id: str) -> Optional[GpuLipsyncTaskModel]:
+        return (
+            self.db.query(GpuLipsyncTaskModel)
+            .filter(GpuLipsyncTaskModel.lipsync_job_id == lipsync_job_id)
+            .order_by(GpuLipsyncTaskModel.created_at.desc())
+            .first()
+        )
+
+    # ── 创建任务（业务侧调用） ────────────────────────────────────
+
+    def create_task(
+        self,
+        video_url: str,
+        audio_url: str,
+        lipsync_job_id: str = "",
+        user_id: str = "",
+        project_id: str = "",
+    ) -> GpuLipsyncTaskModel:
+        task_id = str(uuid.uuid4())
+        now = datetime.now(UTC)
+        task = GpuLipsyncTaskModel(
+            id=task_id,
+            lipsync_job_id=lipsync_job_id,
+            user_id=user_id,
+            project_id=project_id,
+            video_url=video_url,
+            audio_url=audio_url,
+            status="pending",
+            attempt=0,
+            created_at=now,
+            updated_at=now,
+        )
+        self.db.add(task)
+        self.db.commit()
+        self.db.refresh(task)
+        logger.info(
+            "创建 GPU 口型任务 %s (lipsync_job=%s, user=%s)",
+            task_id,
+            lipsync_job_id,
+            user_id,
+        )
+        return task
+
+    # ── 内部辅助 ──────────────────────────────────────────────────
+
+    def _result_key(self, task_id: str) -> str:
+        return f"{self.RESULT_PREFIX}{task_id}.mp4"
+
+    def _touch_task_heartbeat(self, task_id: str, worker_id: str, now: datetime) -> None:
+        """Worker 推理期间的任务级心跳：只刷新属于该 worker 且仍在 processing 的任务。
+
+        任务不存在 / 已被超时回收重新派发 / 已完成 → 静默忽略（此时旧 worker 的
+        结果上报会被结果接口按最终态处理）。
+        """
+        task = self.db.get(GpuLipsyncTaskModel, task_id)
+        if task is None:
+            return
+        if task.status != "processing" or task.worker_id != worker_id:
+            logger.info(
+                "忽略过期任务心跳 task=%s worker=%s（status=%s owner=%s）",
+                task_id,
+                worker_id,
+                task.status,
+                task.worker_id,
+            )
+            return
+        task.last_heartbeat_at = now
+        task.updated_at = now
+        self.db.flush()
+
+    def _touch_worker(self, worker_id: str, now: datetime) -> None:
+        if not worker_id:
+            return
+        worker = self.db.query(GpuWorkerModel).filter(GpuWorkerModel.worker_id == worker_id).one_or_none()
+        if worker is not None:
+            worker.last_heartbeat_at = now
+            self.db.flush()
+        else:
+            # 自注册（poll 时允许自动建一个空 worker 记录，运维可见）
+            worker = GpuWorkerModel(
+                worker_id=worker_id,
+                hostname="",
+                gpu_name="",
+                free_vram_mb=0,
+                capabilities="musetalk",
+                last_heartbeat_at=now,
+                created_at=now,
+            )
+            self.db.add(worker)
+            self.db.flush()
+
+    def _recover_timed_out_tasks(self, now: datetime) -> None:
+        """扫描 processing 状态且真正超时的任务，回退 pending 或失败。
+
+        判定只看任务自身 last_heartbeat_at：claim 时写入，Worker 推理期间通过
+        /gpu/register(task_id=...) 每 30s 续期。因此仅在 Worker 崩溃/断网
+        （任务心跳停滞超过 gpu_task_timeout_seconds）时才回收，
+        不会因 Worker 主循环忙于推理而误回退。
+        """
+        timeout = self.settings.gpu_task_timeout_seconds
+        cutoff = now - timedelta(seconds=timeout)
+        stuck_tasks = (
+            self.db.query(GpuLipsyncTaskModel)
+            .filter(
+                GpuLipsyncTaskModel.status == "processing",
+                GpuLipsyncTaskModel.last_heartbeat_at < cutoff,
+            )
+            .all()
+        )
+        for t in stuck_tasks:
+            if t.attempt >= MAX_ATTEMPTS:
+                t.status = "failed"
+                t.error_msg = f"worker 心跳超时（{timeout}s），重试次数已耗尽"
+                t.finished_at = now
+            else:
+                t.status = "pending"
+                t.worker_id = ""
+                t.started_at = None
+                t.error_msg = f"worker 心跳超时（{timeout}s），等待重试"
+                logger.warning("GPU 任务 %s 心跳超时，回退 pending（attempt=%d）", t.id, t.attempt)
+            t.updated_at = now
+        if stuck_tasks:
+            self.db.flush()
+
+    # ── 业务侧辅助 ──────────────────────────────────────────────────
+
+    def has_available_worker(self) -> bool:
+        """判断是否有 Worker 在心跳新鲜窗口内可用."""
+        stale_cutoff = datetime.now(UTC) - timedelta(seconds=self.settings.gpu_worker_stale_seconds)
+        return (
+            self.db.query(GpuWorkerModel).filter(GpuWorkerModel.last_heartbeat_at >= stale_cutoff).first() is not None
+        )
+
+    def wait_for_result(
+        self,
+        task_id: str,
+        timeout_seconds: Optional[int] = None,
+        poll_interval: Optional[float] = None,
+    ) -> Optional[GpuLipsyncTaskModel]:
+        """同步轮询等待 GPU 任务完成。
+
+        Args:
+            task_id: 任务 ID（由 create_task 返回）
+            timeout_seconds: 总超时，默认取 settings.gpu_lipsync_wait_timeout
+            poll_interval: 轮询间隔秒，默认取 settings.gpu_lipsync_poll_interval
+
+        Returns:
+            终态 task（status=done/failed）；超时返回 None（此时调用方应回退 MediaKit）。
+            等待期间会自动调用 _recover_timed_out_tasks 做超时回收。
+        """
+        import time
+
+        timeout = timeout_seconds if timeout_seconds is not None else self.settings.gpu_lipsync_wait_timeout
+        interval = poll_interval if poll_interval is not None else self.settings.gpu_lipsync_poll_interval
+        deadline = time.monotonic() + timeout
+
+        while True:
+            now = datetime.now(UTC)
+            # 顺手回收超时任务
+            try:
+                self._recover_timed_out_tasks(now)
+                self.db.commit()
+            except Exception as exc:  # noqa: BLE001 - 回收失败不阻塞主流程
+                logger.warning("wait_for_result 回收超时任务异常: %s", exc)
+                self.db.rollback()
+
+            task = self.db.get(GpuLipsyncTaskModel, task_id)
+            if task is None:
+                return None
+            if task.status == "done":
+                return task
+            if task.status == "failed":
+                return task
+            # pending/processing 继续等
+            if time.monotonic() >= deadline:
+                logger.warning("GPU 任务 %s 等待超时（%ds），回退 MediaKit", task_id, timeout)
+                return None
+            time.sleep(interval)

apps/api/app/services/lipsync_service.py

@@ -36,6 +36,7 @@ from sqlalchemy.orm import Session
 
 from packages.adapters.sqlalchemy_impl.models import LipsyncJobModel
 from packages.application.cosyvoice_service import CosyVoiceError
+from packages.config import get_api_settings
 from packages.domain.sentence_timings import (
     compute_sentence_timings,
     probe_audio_duration,
@@ -63,6 +64,7 @@ class LipsyncService:
         self.client = client or get_mediakit_client()
         self._cosyvoice = cosyvoice_service
         self._voice_clone_repo = voice_clone_repo
+        self.settings = get_api_settings()
 
     def _get_cosyvoice(self):
         """延迟获取 CosyVoiceService（与 tts 路由一致，含 OSS 预签名配置）."""
@@ -215,7 +217,52 @@ class LipsyncService:
         if timings:
             job.sentence_timings = timings
 
-        # 4. 签名 URL 并提交 MediaKit
+        # 4. 检查是否走 GPU 路径：开关打开 + 有可用 Worker
+        use_gpu = False
+        if self.settings.use_gpu_lipsync:
+            try:
+                from app.services.gpu_lipsync_service import GpuLipsyncService
+
+                gpu_svc = GpuLipsyncService(self.db)
+                if gpu_svc.has_available_worker():
+                    use_gpu = True
+                    logger.info("[lipsync] 检测到可用 GPU Worker，优先走 MuseTalk 本地推理: job_id=%s", job.id)
+                else:
+                    logger.info("[lipsync] GPU 开关已开但无可用 Worker（心跳过期），回退 MediaKit: job_id=%s", job.id)
+            except Exception as exc:
+                logger.warning("[lipsync] GPU 服务初始化失败，回退 MediaKit: job_id=%s err=%s", job.id, exc)
+
+        if use_gpu:
+            try:
+                gpu_task = self._submit_to_gpu(job=job, gpu_svc=gpu_svc)
+                if gpu_task is not None:
+                    # GPU 任务完成：直接把结果写入 job，标为 completed
+                    job.mediakit_task_id = ""  # GPU 路径不走 MediaKit
+                    job.status = STATUS_COMPLETED
+                    job.output_video_url = gpu_task.result_url
+                    job.output_duration = gpu_task.result_duration or 0.0
+                    job.completed_at = datetime.now(UTC)
+                    job.updated_at = datetime.now(UTC)
+                    self.db.commit()
+                    logger.info(
+                        "[lipsync] GPU MuseTalk 推理完成: job_id=%s gpu_task=%s duration=%.2f",
+                        job.id,
+                        gpu_task.id,
+                        job.output_duration,
+                    )
+                    # 转存到持久 OSS 路径（GPU 结果已在 gpu-lipsync/results/ 下，直接签短链）
+                    return
+                # wait_for_result 返回 None 表示超时/最终失败 → 继续走 MediaKit 兜底
+                logger.warning("[lipsync] GPU 任务等待超时或失败，回退 MediaKit: job_id=%s", job.id)
+                self.db.rollback()  # 回滚可能的中间状态
+            except Exception as exc:
+                logger.exception("[lipsync] GPU 路径异常，回退 MediaKit: job_id=%s err=%s", job.id, exc)
+                try:
+                    self.db.rollback()
+                except Exception:
+                    pass
+
+        # 5. 签名 URL 并提交 MediaKit（兜底路径）
         video_url = self._sign_media_url(job.video_url)
         signed_audio_url = self._sign_media_url(job.audio_url)
         job.audio_url = signed_audio_url
@@ -244,6 +291,51 @@ class LipsyncService:
             self.db.commit()
             raise
 
+    # ── GPU MuseTalk 路径 ────────────────────────────────────────────────
+
+    def _submit_to_gpu(self, *, job, gpu_svc) -> Optional[object]:
+        """创建 GPU 任务并同步等待结果。
+
+        成功返回终态 task 对象（status=done）；超时或 GPU 最终失败返回 None，
+        调用方回退 MediaKit。
+
+        注意：job.video_url / job.audio_url 可能是：
+        - 自家 OSS 存储 key（storage.is_own_url 判断，gpu_svc.create_task 内部
+          get_download_url 会自动签预签名 URL 给 Worker）
+        - 外部公网 URL（CosyVoice 临时链接等）：poll 返回时原样透传给 Worker，
+          Worker 可直接 GET 下载。
+        """
+        # 创建 GPU 任务
+        gpu_task = gpu_svc.create_task(
+            video_url=job.video_url,
+            audio_url=job.audio_url,
+            lipsync_job_id=job.id,
+            user_id=job.user_id,
+            project_id=job.project_id,
+        )
+        logger.info(
+            "[lipsync] 已创建 GPU 任务: job_id=%s gpu_task=%s",
+            job.id,
+            gpu_task.id,
+        )
+        # 同步等待 Worker 处理完成（轮询 DB）
+        final_task = gpu_svc.wait_for_result(gpu_task.id)
+        if final_task is None:
+            logger.warning("[lipsync] GPU 任务等待超时，回退 MediaKit: gpu_task=%s", gpu_task.id)
+            return None
+        if final_task.status != "done":
+            logger.warning(
+                "[lipsync] GPU 任务失败: gpu_task=%s status=%s err=%s",
+                gpu_task.id,
+                final_task.status,
+                final_task.error_msg,
+            )
+            return None
+        # result_url 是 OSS 存储 key；签一个长有效期 URL 写回 job.output_video_url
+        result_signed = self._sign_media_url(final_task.result_url)
+        final_task.result_url = result_signed or final_task.result_url
+        return final_task
+
     # ── 创建任务 ──────────────────────────────────────────────────────────
 
     def create_job(

apps/api/app/services/narrative_service.py

@@ -0,0 +1,344 @@
+"""叙事剪辑前置服务 — #1970 PR3.
+
+叙事模式（assembly_mode='narrative'）在生成任务入队前同步完成：
+
+1. 按 script_id 读取文案（归属校验）；
+2. 按 tts_voice_source 解析音色（preset=CosyVoice 音色 id；clone=克隆档案 id，
+   解析档案归属并取其 CosyVoice voice_id）；
+3. 同步 TTS 合成（复用 tts_job 现有 workflow：提交即同步返回，未完成则轮询兜底），
+   失败直接抛 NarrativeError（HTTP 层转 4xx，任务不入队）；
+4. 把合成音频转存为配音库 audio asset（与 /tts/jobs/{id}/save-to-library 同一套
+   存储路径与元信息约定），返回 asset_id —— 下游仍以 voice_library_id（实为
+   audio asset id）消费，渲染链路零改动。
+
+积分扣点与 /tts 合成端点保持一致（ai_voice 场景），失败退费。
+"""
+
+from __future__ import annotations
+
+import json
+import logging
+import math
+import subprocess
+import tempfile
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Any
+
+from sqlalchemy.orm import Session
+
+from packages.adapters.sqlalchemy_impl.models import ScriptModel
+from packages.application.cosyvoice_service import CosyVoiceService
+from packages.application.tts_job.use_cases import CreateTTSJobUseCase
+from packages.application.tts_job.workflow import TTSWorkflowService
+from packages.domain import Asset, AssetLibrary, AssetLibraryKind, AssetStatus, ClassificationStatus
+from packages.domain.points_rules import calculate_points_cost
+from packages.domain.points_service import PointsService
+from packages.shared.storage import SharedStorageService
+
+logger = logging.getLogger(__name__)
+
+_POINTS_SCENE = "ai_voice"
+_SYNTH_TIMEOUT = 180.0  # 叙事配音在 HTTP 请求内同步等待，长文案分段合成时留出余量
+_CONTENT_TYPE_MAP = {"mp3": "audio/mpeg", "wav": "audio/wav", "pcm": "audio/pcm", "opus": "audio/opus"}
+
+
+class NarrativeError(Exception):
+    """叙事模式前置处理失败（文案/音色/TTS/落库）。"""
+
+    def __init__(self, message: str, *, status_code: int = 400) -> None:
+        super().__init__(message)
+        self.message = message
+        self.status_code = status_code
+
+
+@dataclass(slots=True)
+class NarrativeContext:
+    """叙事模式前置处理结果。"""
+
+    script: ScriptModel
+    voice_asset_id: str
+    tts_job_id: str
+    audio_duration: float
+
+
+def _find_or_create_voice_library(
+    *,
+    user_id: str,
+    project_repository: Any,
+    asset_library_repository: Any,
+) -> AssetLibrary:
+    """找到（或自动创建）用户 voice 素材库；与 tts.py 保存配音库逻辑一致。"""
+    projects = project_repository.find_accessible_projects(user_id)
+    if not projects:
+        raise NarrativeError("没有可用的项目，无法保存叙事配音", status_code=400)
+
+    for project in projects:
+        for lib in asset_library_repository.find_by_project(project.id):
+            kind = lib.kind.value if hasattr(lib.kind, "value") else lib.kind
+            if kind == AssetLibraryKind.VOICE.value:
+                return lib
+
+    project = projects[0]
+    library = AssetLibrary.create(project_id=project.id, name="配音素材库", kind=AssetLibraryKind.VOICE)
+    from sqlalchemy.exc import IntegrityError
+
+    try:
+        return asset_library_repository.create(library)
+    except IntegrityError:
+        session = getattr(asset_library_repository, "session", None)
+        if session is not None:
+            try:
+                session.rollback()
+            except Exception:  # noqa: BLE001 - 回滚失败不影响重查
+                logger.warning("IntegrityError 后回滚 session 失败", exc_info=True)
+        for lib in asset_library_repository.find_by_project(project.id):
+            kind = lib.kind.value if hasattr(lib.kind, "value") else lib.kind
+            if kind == AssetLibraryKind.VOICE.value:
+                return lib
+        raise NarrativeError("配音素材库创建失败，请重试", status_code=500) from None
+
+
+def _resolve_voice(
+    *,
+    user_id: str,
+    tts_voice_id: str,
+    tts_voice_source: str,
+    voice_clone_repository: Any,
+) -> tuple[str, str]:
+    """解析音色 → (CosyVoice voice_id, voice_clone_profile_id)。"""
+    if tts_voice_source == "clone":
+        profile = voice_clone_repository.get(tts_voice_id)
+        if profile is None:
+            raise NarrativeError("克隆音色不存在", status_code=404)
+        if profile.user_id != user_id:
+            raise NarrativeError("无权使用该克隆音色", status_code=403)
+        if not profile.voice_id:
+            raise NarrativeError("音色克隆尚未完成，请稍后再试", status_code=400)
+        return profile.voice_id, profile.id
+    # preset：tts_voice_id 即 CosyVoice 音色 id；与 /tts 端点一致，
+    # 若前端误传克隆档案 UUID，同样兼容解析。
+    profile = voice_clone_repository.get(tts_voice_id)
+    if profile is not None:
+        if profile.user_id != user_id:
+            raise NarrativeError("无权使用该音色", status_code=403)
+        if not profile.voice_id:
+            raise NarrativeError("音色克隆尚未完成，请稍后再试", status_code=400)
+        return profile.voice_id, profile.id
+    return tts_voice_id, ""
+
+
+def _save_tts_job_as_voice_asset(
+    *,
+    job: Any,
+    user_id: str,
+    name: str,
+    project_repository: Any,
+    asset_library_repository: Any,
+    asset_repository: Any,
+    storage_service: SharedStorageService,
+) -> Asset:
+    """把已完成 TTS job 的音频转存为配音库 audio asset（同 save-to-library 约定）。"""
+    if not job.output_audio_url and not job.output_audio_key:
+        raise NarrativeError("TTS 合成缺少输出音频", status_code=502)
+
+    library = _find_or_create_voice_library(
+        user_id=user_id,
+        project_repository=project_repository,
+        asset_library_repository=asset_library_repository,
+    )
+
+    audio_format = (job.format or "mp3").strip() or "mp3"
+    content_type = _CONTENT_TYPE_MAP.get(audio_format, "audio/mpeg")
+    storage_key = f"uploads/voice/tts/{job.id}.{audio_format}"
+
+    tmp_path: Path | None = None
+    audio_duration: float | None = None
+    file_size = 0
+    try:
+        with tempfile.NamedTemporaryFile(suffix=f".{audio_format}", delete=False) as tmp:
+            tmp_path = Path(tmp.name)
+        download_source = job.output_audio_key or job.output_audio_url
+        downloaded = storage_service.download_asset(download_source, tmp_path)
+        if not downloaded or not tmp_path.exists() or tmp_path.stat().st_size == 0:
+            raise NarrativeError("叙事配音音频转存失败", status_code=502)
+        file_size = tmp_path.stat().st_size
+        storage_service.upload_file(tmp_path, storage_key, content_type=content_type)
+
+        try:
+            proc = subprocess.run(
+                [
+                    "ffprobe",
+                    "-v",
+                    "quiet",
+                    "-print_format",
+                    "json",
+                    "-show_format",
+                    str(tmp_path),
+                ],
+                capture_output=True,
+                text=True,
+                timeout=10,
+            )
+            if proc.returncode == 0:
+                dur = float(json.loads(proc.stdout).get("format", {}).get("duration", 0))
+                if dur > 0:
+                    audio_duration = dur
+        except Exception:  # noqa: BLE001 - ffprobe 仅用于时长兜底
+            logger.warning("叙事配音 ffprobe 时长提取失败: job_id=%s", job.id, exc_info=True)
+    except NarrativeError:
+        raise
+    except Exception as e:  # noqa: BLE001
+        logger.error("叙事配音转存失败: job_id=%s, error=%s", job.id, e, exc_info=True)
+        raise NarrativeError("叙事配音音频转存失败", status_code=502) from e
+    finally:
+        if tmp_path and tmp_path.exists():
+            try:
+                tmp_path.unlink()
+            except OSError:
+                pass
+
+    metadata_: dict[str, object] = {
+        "source": "tts_job",
+        "tts_job_id": job.id,
+        "narrative": True,
+        "format": job.format,
+        "sample_rate": job.sample_rate,
+        "voice_id": job.voice_id,
+        "voice_name": job.voice_model or "",
+    }
+    if job.metadata:
+        for key in ("speed", "language"):
+            if key in job.metadata:
+                metadata_[key] = job.metadata[key]
+
+    asset = Asset.create(
+        project_id=library.project_id,
+        library_id=library.id,
+        name=name or f"叙事配音-{job.id[:8]}",
+        storage_key=storage_key,
+        mime_type=content_type,
+        metadata=metadata_,
+        file_size=file_size,
+        duration=job.duration or audio_duration or None,
+        status=AssetStatus.READY,
+        classification_status=ClassificationStatus.PENDING,
+        uploaded_by_user_id=user_id,
+    )
+    try:
+        return asset_repository.create(asset)
+    except Exception as e:  # noqa: BLE001
+        logger.error("叙事配音 asset 落库失败，清理 OSS: %s, error=%s", storage_key, e, exc_info=True)
+        try:
+            storage_service.delete_file(storage_key)
+        except Exception:  # noqa: BLE001
+            logger.warning("清理孤儿 OSS 文件失败: %s", storage_key, exc_info=True)
+        raise NarrativeError("叙事配音保存失败，请重试", status_code=502) from e
+
+
+def prepare_narrative_voice(
+    *,
+    db: Session,
+    user_id: str,
+    script_id: str,
+    tts_voice_id: str,
+    tts_voice_source: str,
+    tts_repository: Any,
+    cosyvoice_service: CosyVoiceService,
+    voice_clone_repository: Any,
+    asset_repository: Any,
+    asset_library_repository: Any,
+    project_repository: Any,
+    storage_service: SharedStorageService,
+    points_enabled: bool = False,
+    is_member: bool = False,
+    member_type: str | None = None,
+) -> NarrativeContext:
+    """叙事模式入队前同步合成配音并落为 audio asset。
+
+    Raises:
+        NarrativeError: 文案缺失/归属不符、音色不可用、TTS 失败、转存失败。
+    """
+    script = db.query(ScriptModel).filter(ScriptModel.id == script_id, ScriptModel.user_id == user_id).first()
+    if script is None:
+        raise NarrativeError("文案不存在或无权使用", status_code=404)
+    content = (script.content or "").strip()
+    if not content:
+        raise NarrativeError("文案内容为空，无法合成配音", status_code=400)
+
+    actual_voice_id, clone_profile_id = _resolve_voice(
+        user_id=user_id,
+        tts_voice_id=tts_voice_id,
+        tts_voice_source=tts_voice_source,
+        voice_clone_repository=voice_clone_repository,
+    )
+
+    # 积分扣点（与 /tts 合成端点同口径），失败时在合成失败分支退费
+    points_svc = PointsService() if points_enabled else None
+    points_deducted = 0
+    if points_svc is not None:
+        est_minutes = max(1.0, math.ceil(len(content) / 240))
+        points_deducted = calculate_points_cost(
+            _POINTS_SCENE,
+            is_member=is_member,
+            duration_minutes=est_minutes,
+            member_type=member_type,
+        )
+        deduct_res = points_svc.deduct_points(user_id, points_deducted, _POINTS_SCENE, db)
+        if not deduct_res["success"]:
+            raise NarrativeError(
+                f"积分不足，需要 {points_deducted} 积分，当前余额 {deduct_res['balance']}",
+                status_code=402,
+            )
+
+    use_case = CreateTTSJobUseCase(tts_repository)
+    job = use_case.execute(
+        user_id=user_id,
+        input_text=content,
+        voice_id=actual_voice_id,
+        voice_clone_profile_id=clone_profile_id,
+        metadata={"speed": 1.0, "emotion": "", "language": "zh-CN", "narrative": True, "script_id": script_id},
+    )
+
+    workflow = TTSWorkflowService(repository=tts_repository, cosyvoice_service=cosyvoice_service)
+    try:
+        job = workflow.start_synthesis(job.id)
+        if not job.is_completed:
+            job = workflow.poll_and_process_synthesis(job.id, timeout=_SYNTH_TIMEOUT)
+    except Exception as e:  # noqa: BLE001 - 同步合成异常统一转 NarrativeError
+        logger.error("叙事配音 TTS 合成失败: job_id=%s, error=%s", job.id, e, exc_info=True)
+        try:
+            workflow.process_synthesis_failure(job.id, str(e))
+        except Exception:  # noqa: BLE001
+            logger.warning("标记叙事 TTS job 失败出错: job_id=%s", job.id, exc_info=True)
+        if points_deducted and points_svc is not None:
+            try:
+                points_svc.refund_points(user_id, points_deducted, _POINTS_SCENE, db, ref_id=job.id)
+            except Exception:  # noqa: BLE001
+                logger.warning("叙事 TTS 失败退积分异常: job_id=%s", job.id, exc_info=True)
+        raise NarrativeError(f"配音合成失败：{e}", status_code=502) from e
+
+    if not job.is_completed:
+        if points_deducted and points_svc is not None:
+            try:
+                points_svc.refund_points(user_id, points_deducted, _POINTS_SCENE, db, ref_id=job.id)
+            except Exception:  # noqa: BLE001
+                logger.warning("叙事 TTS 未完成退积分异常: job_id=%s", job.id, exc_info=True)
+        raise NarrativeError("配音合成未完成，请稍后重试", status_code=504)
+
+    asset = _save_tts_job_as_voice_asset(
+        job=job,
+        user_id=user_id,
+        name=(script.title or "叙事配音")[:60],
+        project_repository=project_repository,
+        asset_library_repository=asset_library_repository,
+        asset_repository=asset_repository,
+        storage_service=storage_service,
+    )
+
+    return NarrativeContext(
+        script=script,
+        voice_asset_id=asset.id,
+        tts_job_id=job.id,
+        audio_duration=float(job.duration or asset.duration or 0.0),
+    )

apps/api/app/services/plan_generator_service.py

@@ -22,6 +22,11 @@ from packages.adapters.sqlalchemy_impl import (
     SQLAlchemyEditPlanClipRepository,
     SQLAlchemyEditPlanRepository,
 )
+from packages.domain.atom_clip_resolver import load_atom_clips_for_assets
+from packages.domain.atom_clip_selector import (
+    estimate_required_clip_count,
+    select_atom_clips,
+)
 from packages.domain.config_schemas import normalize_plan_config
 from packages.domain.edit_plan import EditPlan
 from packages.domain.edit_plan_clip import EditPlanClip
@@ -52,10 +57,12 @@ class PlanGeneratorService:
     基于模板 + 素材，自动生成 EditPlan 及 EditPlanClip 列表。
     """
 
-    def __init__(self, db: Session, asset_repo=None) -> None:
+    def __init__(self, db: Session, asset_repo=None, atom_clip_repo=None) -> None:
         self._plan_repo = SQLAlchemyEditPlanRepository(db)
         self._clip_repo = SQLAlchemyEditPlanClipRepository(db)
         self._asset_repo = asset_repo
+        # #1970 原子化切片：可选注入；未注入时走旧的整条素材选片路径（向后兼容）
+        self._atom_clip_repo = atom_clip_repo
 
     # ── 公开接口 ─────────────────────────────────────────────────────────────
 
@@ -121,18 +128,34 @@ class PlanGeneratorService:
 
         # 4. 按 editing_mode 分配素材
         if asset_ids:
-            # 获取素材时长信息，用于随机起始时间
-            asset_durations = None
-            if self._asset_repo:
-                asset_durations = self._fetch_asset_durations(asset_ids)
-            self._distribute_assets(
-                clips,
-                asset_ids,
-                editing_mode,
-                random_selection=random_preview,
-                asset_durations=asset_durations,
-                user_id=created_by_user_id,
-            )
+            # #1970 原子化切片：素材 clip 从 atom_clips 表选取（未就绪自动内存兜底）。
+            # 预览随机模式保持旧路径（整条素材 + 随机起点），与现有预览契约一致。
+            atom_applied = False
+            if not random_preview and self._atom_clip_repo is not None:
+                try:
+                    atom_applied = self._distribute_atom_clips(
+                        clips,
+                        asset_ids,
+                        editing_mode,
+                        user_id=created_by_user_id,
+                    )
+                except Exception:
+                    logger.warning("原子片段选片失败，回退整条素材选片", exc_info=True)
+                    atom_applied = False
+
+            if not atom_applied:
+                # 获取素材时长信息，用于随机起始时间
+                asset_durations = None
+                if self._asset_repo:
+                    asset_durations = self._fetch_asset_durations(asset_ids)
+                self._distribute_assets(
+                    clips,
+                    asset_ids,
+                    editing_mode,
+                    random_selection=random_preview,
+                    asset_durations=asset_durations,
+                    user_id=created_by_user_id,
+                )
 
         # 5. 持久化所有 clips 并计算总时长
         created_clips: list[EditPlanClip] = []
@@ -259,6 +282,103 @@ class PlanGeneratorService:
             external_used_segments=external_used_segments,
         )
 
+    def _distribute_atom_clips(
+        self,
+        clips: list[EditPlanClip],
+        asset_ids: list[str],
+        editing_mode: str,
+        *,
+        user_id: str = "",
+    ) -> bool:
+        """#1970 原子化切片选片（就地修改 clips，未持久化）.
+
+        从 ``asset_atom_clips`` 表按原子片段选取；老素材/切片未就绪的素材
+        内存兜底切片。同一原子片段在一次方案中只用一次；跨视频避让走
+        edit_plan_clips.atom_clip_id 最近使用记录。
+
+        Returns:
+            True 表示原子片段选片成功；False 表示无可用片段，调用方应回退
+            到旧的整条素材 distribute_assets。
+        """
+        # 1. 加载候选原子片段（DB + 兜底）
+        clips_by_asset = load_atom_clips_for_assets(
+            asset_ids,
+            atom_clip_repo=self._atom_clip_repo,
+            asset_repo=self._asset_repo,
+        )
+        if not clips_by_asset:
+            return False
+
+        # 2. 最近使用片段（跨视频原子片段级避让）
+        recently_used: set[str] = set()
+        if user_id and hasattr(self._clip_repo, "list_recent_atom_clip_ids_by_user"):
+            try:
+                recently_used = set(self._clip_repo.list_recent_atom_clip_ids_by_user(user_id, limit=200))
+            except Exception:
+                logger.warning("跨视频原子片段避让查询失败", exc_info=True)
+
+        # 3. 片段需求估算：无配音时按 clips 数量；voice_over 的配音总时长存于
+        #    clip.config["voice_duration"]，按 平均片段时长≈需要片段数 估算
+        voice_total = 0.0
+        for c in clips:
+            cfg_vd = c.config.get("voice_duration") if c.config else None
+            if cfg_vd:
+                voice_total += float(cfg_vd)
+        avg_clip_target = sum(float(c.duration or 0.0) for c in clips) / max(len(clips), 1)
+        required_count = estimate_required_clip_count(
+            voice_total or sum(float(c.duration or 0.0) for c in clips),
+            avg_clip_target or 3.5,
+        )
+        required_count = max(required_count, len(clips))
+
+        rng = random.Random()
+
+        # 4. 正式生成：先按素材 smart_score 对素材池排序，再展开为片段池
+        #    （同素材的片段保持连续，高分素材的片段排在前面优先入选）
+        if self._asset_repo:
+            asset_order = self._sort_assets_by_smart_score(list(clips_by_asset.keys()))
+            ordered: dict[str, list] = {}
+            for aid in asset_order:
+                if aid in clips_by_asset:
+                    ordered[aid] = clips_by_asset[aid]
+            clips_by_asset = ordered
+
+        candidates: list = []
+        for asset_clips in clips_by_asset.values():
+            candidates.extend(asset_clips)
+
+        # 5. 逐虚拟片段选片：评分排序，同片段不重复使用
+        used_atom_ids: set[str] = set()
+        asset_usage: dict[str, int] = {}
+        assigned = 0
+        for clip in clips:
+            # 对每个虚拟片段重新评分（usage_count 随选择动态变化）
+            scored = select_atom_clips(
+                candidates,
+                target_duration=float(clip.duration or 0.0),
+                used_atom_clip_ids=used_atom_ids,
+                asset_usage_counts=asset_usage,
+                recently_used_atom_ids=recently_used,
+                required_count=required_count,
+                limit=1,
+                rng=rng,
+            )
+            if not scored:
+                # 候选耗尽（同片段不可重复），交由调用方回退或留白
+                continue
+            picked = scored[0]
+            clip.asset_id = picked.asset_id
+            clip.atom_clip_id = picked.atom_clip_id
+            clip.start_time = round(picked.start_time, 3)
+            clip.duration = round(picked.duration, 3)
+            used_atom_ids.add(picked.atom_clip_id)
+            asset_usage[picked.asset_id] = asset_usage.get(picked.asset_id, 0) + 1
+            assigned += 1
+
+        if assigned == 0:
+            return False
+        return True
+
     def _fetch_asset_scene_points(self, asset_ids: list[str]) -> dict[str, list[float]]:
         """从素材 metadata 读取场景切换点缓存（无缓存的素材不包含在结果中）。"""
         points_map: dict[str, list[float]] = {}

apps/api/app/services/script_asr_service.py

@@ -38,7 +38,12 @@ def transcribe_to_text(media_path: str | Path) -> str:
         ASRTranscriptionError: ASR 调用失败
     """
     # 延迟导入，避免循环依赖和启动时副作用
-    from apps.worker.services.asr_service_factory import get_asr_service
+    try:
+        from apps.worker.services.asr_service_factory import get_asr_service
+    except ImportError as exc:
+        # API 镜像未打包 worker 代码（本地 ASR 依赖 worker 的 asr_service_factory）
+        logger.warning("本地 ASR 不可用（apps.worker 未安装）: %s", exc)
+        raise ASRNotConfiguredError("本地 ASR 服务不可用（worker 模块未安装）") from exc
 
     asr = get_asr_service()
     if asr is None:

apps/web/e2e/core-douyin-extract.spec.ts

@@ -0,0 +1,117 @@
+import { expect, test, type APIRequestContext, type Page } from "@playwright/test"
+
+const PASSWORD = "SmokePass123!"
+const apiBase = process.env.E2E_API_BASE || "/api/v1"
+const apiOrigin = apiBase.endsWith("/api/v1") ? apiBase.slice(0, -"/api/v1".length) : ""
+
+async function routeBrowserApiToTestApi(page: Page) {
+  if (!apiOrigin) return
+  await page.route("**/api/v1/**", async (route) => {
+    const sourceUrl = new URL(route.request().url())
+    const response = await route.fetch({
+      url: `${apiOrigin}${sourceUrl.pathname}${sourceUrl.search}`,
+    })
+    await route.fulfill({ response })
+  })
+}
+
+async function loginWithRetry(request: APIRequestContext, email: string, password: string) {
+  for (let i = 0; i <= 2; i++) {
+    const r = await request.post(`${apiBase}/auth/login`, { data: { email, password } })
+    if (r.status() !== 429) {
+      expect(r.ok(), `login: ${await r.text()}`).toBeTruthy()
+      return (await r.json()).access_token as string
+    }
+    console.log(`[douyin] 429 retry ${i + 1}/2`)
+    await new Promise((res) => setTimeout(res, 65000))
+  }
+  throw new Error("Login retries exhausted")
+}
+
+/**
+ * #1972 抖音文案提取冒烟
+ *
+ * 路径：文案库页面 → 点「🎬 从抖音提取」→ 粘贴分享文案 → 点「开始提取」
+ * → mock /api/v1/scripts/extract-from-douyin 返回稳定文案 → 断言「新建文案」弹窗中预填了非空文案
+ */
+test.describe("Douyin Script Extraction (#1972)", () => {
+  test("extract flow: open modal, paste link, text prefilled in create modal", async ({
+    page,
+    request,
+  }) => {
+    test.setTimeout(180_000)
+    await page.setViewportSize({ width: 1440, height: 900 })
+
+    const suffix = Math.random().toString(36).slice(2, 8)
+    const email = `e2e-douyin-${suffix}@example.com`
+    await request.post(`${apiBase}/auth/register`, {
+      data: { email, password: PASSWORD, username: `e2e_dy_${suffix}` },
+    })
+    const token = await loginWithRetry(request, email, PASSWORD)
+    const authHeader = { Authorization: `Bearer ${token}` }
+
+    const proj = await request.post(`${apiBase}/projects`, {
+      headers: authHeader,
+      data: { name: `Smoke Douyin ${suffix}` },
+    })
+    const projectId = (await proj.json()).id ?? (await proj.json()).project_id
+    await request.post(`${apiBase}/asset-libraries`, {
+      headers: authHeader,
+      data: { project_id: projectId, name: "Smoke", kind: "video" },
+    })
+
+    await page.addInitScript((t: string) => {
+      window.localStorage.setItem("access_token", t)
+      window.localStorage.setItem(
+        "auth-storage",
+        JSON.stringify({ state: { token: t, user: null } }),
+      )
+    }, token)
+    await routeBrowserApiToTestApi(page)
+
+    // Mock 抖音提取接口返回稳定文案
+    const extractedText = "大家好，今天给大家推荐一款超好用的产品，性价比非常高，快来看看吧！"
+    await page.route("**/api/v1/scripts/extract-from-douyin", (route) =>
+      route.fulfill({
+        status: 200,
+        contentType: "application/json",
+        body: JSON.stringify({ text: extractedText, duration_seconds: 15 }),
+      }),
+    )
+    // 文案列表空态
+    await page.route(
+      (url) => url.pathname.endsWith("/scripts") && !url.pathname.includes("extract-from-douyin"),
+      (route) =>
+        route.fulfill({
+          status: 200,
+          contentType: "application/json",
+          body: JSON.stringify({ items: [], total: 0, page: 1, page_size: 20 }),
+        }),
+    )
+
+    await page.goto("/app/scripts")
+    // 文案库页面加载
+    await expect(page.getByText(/文案库|文案/).first()).toBeVisible({ timeout: 30000 })
+
+    // 点「🎬 从抖音提取」按钮
+    await page.getByRole("button", { name: /从抖音提取/ }).click()
+    await expect(page.getByText("从抖音视频提取文案")).toBeVisible({ timeout: 5000 })
+
+    // 在 TextArea 粘贴"抖音分享文案"
+    const textarea = page.locator(".ant-modal textarea").first()
+    await expect(textarea).toBeVisible()
+    await textarea.fill("8.88 复制打开抖音，看看【推荐视频】https://v.douyin.com/abcDEF/")
+
+    // 点「开始提取」
+    await page.getByRole("button", { name: "开始提取" }).click()
+    await expect(page.getByText(/提取中/)).toBeVisible({ timeout: 3000 })
+
+    // 等待抖音弹窗关闭，「新建文案」弹窗打开并预填提取文案
+    await expect(page.getByText("从抖音视频提取文案")).not.toBeVisible({ timeout: 15000 })
+    await expect(page.getByText("新建文案")).toBeVisible({ timeout: 5000 })
+    const createTextarea = page.locator(".ant-modal textarea").first()
+    await expect(createTextarea).toBeVisible()
+    await expect(createTextarea).toHaveValue(new RegExp(extractedText.slice(0, 10)))
+    console.log("[douyin] Extraction flow completed ✓, text length:", extractedText.length)
+  })
+})

apps/web/e2e/core-generation.spec.ts

@@ -1,4 +1,4 @@
-import { expect, test, type APIRequestContext } from "@playwright/test"
+import { expect, test, type APIRequestContext, type Page } from "@playwright/test"
 import * as fs from "node:fs"
 import * as path from "node:path"
 import { fileURLToPath } from "node:url"
@@ -8,7 +8,8 @@ const PASSWORD = "SmokePass123!"
 const apiBase = process.env.E2E_API_BASE || "/api/v1"
 const apiOrigin = apiBase.endsWith("/api/v1") ? apiBase.slice(0, -"/api/v1".length) : ""
 
-const routeBrowserApiToTestApi = async (page: import("@playwright/test").Page) => {
+/** 将浏览器侧 /api/v1 请求路由到 Playwright request 源（支持跨域） */
+async function routeBrowserApiToTestApi(page: Page) {
   if (!apiOrigin) return
   await page.route("**/api/v1/**", async (route) => {
     const sourceUrl = new URL(route.request().url())
@@ -24,276 +25,358 @@ async function loginWithRetry(
   email: string,
   password: string,
   maxRetries = 2,
-) {
+): Promise<string> {
   for (let i = 0; i <= maxRetries; i++) {
-    const response = await request.post(`${apiBase}/auth/login`, {
-      data: { email, password },
-    })
-    if (response.status() !== 429) return response
-    console.log(`[login] 触发限流，等待 65s 后重试 (${i + 1}/${maxRetries})`)
+    const resp = await request.post(`${apiBase}/auth/login`, { data: { email, password } })
+    if (resp.status() !== 429) {
+      expect(resp.ok(), `Login should succeed: ${await resp.text()}`).toBeTruthy()
+      const data = await resp.json()
+      return data.access_token
+    }
+    console.log(`[login] 429 rate limited, retry ${i + 1}/${maxRetries} after 65s`)
     await new Promise((r) => setTimeout(r, 65000))
   }
-  return request.post(`${apiBase}/auth/login`, {
-    data: { email, password },
+  throw new Error("Login failed after retries")
+}
+
+/**
+ * 注册新用户 + 建项目/视频库/上传 sample.mp4，等素材 ready。返回 { token, projectId, libraryId, assetId }。
+ */
+async function setupFreshUser(
+  request: APIRequestContext,
+  label: string,
+): Promise<{ token: string; libraryId: string; assetId: string; suffix: string }> {
+  const suffix = Math.random().toString(36).slice(2, 8)
+  const email = `e2e-${label}-${suffix}@example.com`
+  await request.post(`${apiBase}/auth/register`, {
+    data: { email, password: PASSWORD, username: `e2e_${label}_${suffix}` },
   })
-}
+  const token = await loginWithRetry(request, email, PASSWORD)
+  const auth = { Authorization: `Bearer ${token}` }
 
-type ProjectResponse = { id: string }
-type LibraryResponse = { id: string }
-type AssetListResponse = {
-  items: Array<{
-    id: string
-    name: string
-    status: string
-  }>
-}
+  const proj = await request.post(`${apiBase}/projects`, {
+    headers: auth,
+    data: { name: `Smoke ${label} ${suffix}` },
+  })
+  expect(proj.ok(), `create project: ${await proj.text()}`).toBeTruthy()
+  const projectId = (await proj.json()).id ?? (await proj.json()).project_id
 
-test.describe("Core generation flow", () => {
-  test.describe.configure({ timeout: 360_000 })
+  const lib = await request.post(`${apiBase}/asset-libraries`, {
+    headers: auth,
+    data: { project_id: projectId, name: "Smoke", kind: "video" },
+  })
+  expect(lib.ok(), `create library: ${await lib.text()}`).toBeTruthy()
+  const libraryId = (await lib.json()).id
 
-  test("walks through wizard with count modal and starts generation", async ({ page, request }) => {
-    test.setTimeout(360_000)
-
-    await routeBrowserApiToTestApi(page)
-    const suffix = Date.now().toString(36)
-    const email = `e2e-gen-${suffix}@example.com`
-    const username = `e2e_gen_${suffix}`
-    const libraryName = `E2E Gen Lib ${suffix}`
-
-    // Register
-    const register = await request.post(`${apiBase}/auth/register`, {
-      data: { email, username, password: PASSWORD, display_name: username },
-    })
-    expect(register.status()).toBe(201)
-    const registerData = (await register.json()) as { user_id: string }
-
-    // Login
-    const login = await loginWithRetry(request, email, PASSWORD)
-    expect(login.status()).toBe(200)
-    const loginData = (await login.json()) as { access_token: string }
-    const headers = { Authorization: `Bearer ${loginData.access_token}` }
-
-    // Create project
-    const project = await request.post(`${apiBase}/projects`, {
-      headers,
-      data: { name: `E2E Gen Proj ${suffix}` },
-    })
-    expect(project.status()).toBe(200)
-    const projectData = (await project.json()) as ProjectResponse
-
-    // Create asset library
-    const library = await request.post(`${apiBase}/asset-libraries`, {
-      headers,
-      data: { project_id: projectData.id, name: libraryName, kind: "video" },
-    })
-    expect(library.status()).toBe(200)
-    const libraryData = (await library.json()) as LibraryResponse
-
-    // Upload source video
-    const sourceFileName = "e2e-gen-source.mp4"
-    const sampleVideoPath = path.join(__dirname, "fixtures", "sample.mp4")
-    const sampleVideoBuffer = fs.readFileSync(sampleVideoPath)
-    const upload = await request.post(`${apiBase}/upload`, {
-      headers,
-      multipart: {
-        project_id: projectData.id,
-        library_id: libraryData.id,
-        file: {
-          name: sourceFileName,
-          mimeType: "video/mp4",
-          buffer: sampleVideoBuffer,
-        },
+  const samplePath = path.join(__dirname, "fixtures", "sample.mp4")
+  const sampleBuf = fs.readFileSync(samplePath)
+  const up = await request.post(`${apiBase}/upload`, {
+    headers: auth,
+    multipart: {
+      project_id: projectId,
+      library_id: libraryId,
+      file: {
+        name: "sample.mp4",
+        mimeType: "video/mp4",
+        buffer: sampleBuf,
       },
-    })
-    expect(upload.status()).toBe(200)
+    },
+  })
+  expect(up.ok(), `upload sample: ${await up.text()}`).toBeTruthy()
+  const assetId = (await up.json()).asset_id
+  await expect
+    .poll(
+      async () => {
+        const r = await request.get(`${apiBase}/assets/${assetId}`, { headers: auth })
+        return r.ok() ? (await r.json()).status : "pending"
+      },
+      { timeout: 90_000, intervals: [3000, 3000, 5000] },
+    )
+    .toBe("ready")
+  return { token, libraryId, assetId, suffix }
+}
 
-    // Wait for asset to be ready
-    await expect
-      .poll(
-        async () => {
-          const assets = await request.get(`${apiBase}/assets`, {
-            headers,
-            params: { library_id: libraryData.id },
-          })
-          if (!assets.ok()) return `http_${assets.status()}`
-          const data = (await assets.json()) as AssetListResponse
-          const asset = data.items.find((a) => a.name === sourceFileName)
-          if (!asset) return "missing"
-          return asset.status
-        },
-        { timeout: 30_000, intervals: [1_000, 2_000, 3_000] },
+/**
+ * #1970 智能剪辑核心冒烟（新 5 步向导）
+ *
+ * 新流程：选择模式 → 选择素材 → 选择标题 → 确认生成 → 选择封面
+ *
+ * 两条路径：
+ *   1) 随机混剪（默认）→ Step1 下一步 → 配音选择弹窗 → Step2 选素材 → 数量弹窗
+ *      → Step3 标题 → Step4 确认生成 → 断言任务创建
+ *   2) 叙事剪辑 → Step1 切模式 → 下一步 → 文案选择弹窗 → TTS 弹窗选音色（mock 合成）
+ *      → Step2 AI 提示卡可见 + 选素材 → 数量弹窗 → Step3 标题 → Step4 确认生成
+ *      → 断言任务创建
+ */
+test.describe("Core Smart-Edit Flow (#1970)", () => {
+  test("random mode: 5-step wizard creates generation task", async ({ page, request }) => {
+    test.setTimeout(600_000)
+    await page.setViewportSize({ width: 1440, height: 1000 })
+    const { token, suffix } = await setupFreshUser(request, "random")
+    const authHeader = { Authorization: `Bearer ${token}` }
+
+    // 确保默认模板存在（智能剪辑页依赖模板）
+    const tmpls = await request.get(`${apiBase}/templates`, { headers: authHeader })
+    const tmplsJson = await tmpls.json()
+    const templates = Array.isArray(tmplsJson)
+      ? tmplsJson
+      : Array.isArray(tmplsJson.items)
+        ? tmplsJson.items
+        : []
+    expect(templates.length).toBeGreaterThan(0)
+
+    // 注入登录态 + 路由 API
+    await page.addInitScript((t: string) => {
+      window.localStorage.setItem("access_token", t)
+      window.localStorage.setItem(
+        "auth-storage",
+        JSON.stringify({ state: { token: t, user: null } }),
       )
-      .toBe("ready")
+    }, token)
+    await routeBrowserApiToTestApi(page)
 
-    // GET /templates auto-creates a default template for new users
-    const templatesResp = await request.get(`${apiBase}/templates`, { headers })
-    expect(templatesResp.status(), await templatesResp.text()).toBe(200)
-    const templatesData = (await templatesResp.json()) as {
-      items: Array<{ id: string }>
-    }
-    expect(Array.isArray(templatesData.items)).toBe(true)
-    expect(templatesData.items.length).toBeGreaterThan(0)
-    const templateId = templatesData.items[0].id
-    expect(templateId).toBeTruthy()
-
-    // Set auth in localStorage
-    await page.addInitScript(
-      ({ token, user }) => {
-        localStorage.setItem("access_token", token)
-        localStorage.setItem(
-          "auth-storage",
-          JSON.stringify({
-            state: { user, isAuthenticated: true },
-            version: 0,
+    // ── 提前 mock 配音列表（VoiceSelectModal 查询 /assets?kind=voice） ──
+    await page.route(
+      (url) => url.pathname.endsWith("/assets") && url.searchParams.get("kind") === "voice",
+      (route) =>
+        route.fulfill({
+          status: 200,
+          contentType: "application/json",
+          body: JSON.stringify({
+            items: [
+              {
+                id: `asset-voice-${suffix}`,
+                name: "测试配音.mp3",
+                file_url: "data:audio/mpeg;base64,",
+                duration: 10,
+                file_size: 1024,
+                kind: "voice",
+                status: "ready",
+              },
+            ],
+            total: 1,
           }),
-        )
-      },
-      {
-        token: loginData.access_token,
-        user: {
-          id: registerData.user_id,
-          user_id: registerData.user_id,
-          email,
-          username,
-          display_name: username,
-          is_email_verified: true,
-          email_verified: true,
-        },
-      },
+        }),
     )
 
-    // Navigate to generate page
     await page.goto("/app/generate")
     await expect(page.getByRole("heading", { name: "智能剪辑" })).toBeVisible({
-      timeout: 20_000,
+      timeout: 30000,
     })
 
-    // 5步向导：素材(1)→配音(2)→标题(3)→确认生成(4)→封面(5)
+    // ── Step 1：默认随机混剪选中，点下一步 ──────────────────────────
+    await expect(page.getByText("选择模式", { exact: true })).toBeVisible()
+    await expect(page.getByText("随机混剪")).toBeVisible()
+    await page.getByRole("button", { name: /下一步/ }).click()
 
-    // ── Step 1: 素材选择 ──
-    await expect(page.getByRole("heading", { name: /选择素材/ })).toBeVisible()
-    const librarySelect = page.locator("select").first()
-    await librarySelect.selectOption({ label: libraryName })
-    const materialCard = page.getByTestId("material-card").filter({ hasText: sourceFileName })
-    await expect(materialCard).toBeVisible({ timeout: 10_000 })
-    await materialCard.click({ position: { x: 15, y: 15 } })
-    await expect(materialCard.getByTestId("material-card-check")).toBeVisible({ timeout: 5_000 })
-    await page.getByRole("button", { name: "下一步" }).click()
+    // ── 配音选择弹窗：选第一个配音 → 确认 ─────────────────────────
+    await expect(page.getByText("🎙️ 选择配音")).toBeVisible({ timeout: 5000 })
+    await page.getByText("测试配音.mp3").first().click()
+    await page.getByRole("button", { name: "确认选择" }).click()
+    await expect(page.getByText("🎙️ 选择配音")).not.toBeVisible()
 
-    // ── 数量弹窗（PreviewCountModal） ──
-    await expect(page.getByRole("heading", { name: "要生成几个视频？" })).toBeVisible({
-      timeout: 5_000,
-    })
+    // ── Step 2：选择素材 ──────────────────────────────────────────
+    await expect(page.getByText("选择素材", { exact: true })).toBeVisible({ timeout: 10000 })
+    await page.getByTestId("material-card").first().click()
+    await page.getByRole("button", { name: /下一步/ }).click()
+
+    // ── 数量弹窗：默认 1 个 → 确认 ───────────────────────────────
+    await expect(page.getByText("要生成几个视频？")).toBeVisible({ timeout: 5000 })
     await page.getByRole("button", { name: "生成 1 个视频" }).click()
 
-    // ── Step 2: 配音（新注册用户无配音素材，跳过） ──
-    await expect(page.getByRole("heading", { name: /选择配音/ })).toBeVisible({ timeout: 15000 })
-    await page.getByRole("button", { name: "下一步" }).click()
-
-    // ── Step 3: 标题设置 ──
-    await expect(page.getByRole("heading", { name: /选择标题/ })).toBeVisible({ timeout: 15000 })
-    await page.waitForTimeout(2000)
-
-    const titleInput = page.locator(".ant-select-auto-complete input")
+    // ── Step 3：填写标题 ──────────────────────────────────────────
+    await expect(page.getByText("选择标题", { exact: true })).toBeVisible({ timeout: 10000 })
+    const titleInput = page.getByPlaceholder("输入或从标题库选择")
     await expect(titleInput).toBeVisible({ timeout: 5000 })
-    await titleInput.fill(`E2E Test ${suffix}`)
+    await titleInput.fill(`测试随机剪辑 ${suffix}`)
+    await page.getByRole("button", { name: /下一步/ }).click()
 
-    // Step 3 底部是「下一步 →」，点击进入 Step 4（确认生成）
-    await page.getByRole("button", { name: "下一步" }).click()
+    // ── Step 4：确认生成 ──────────────────────────────────────────
+    await expect(page.getByText("📋 生成配置")).toBeVisible({ timeout: 10000 })
+    await expect(page.getByText("随机混剪")).toBeVisible()
+    const confirmBtn = page.getByRole("button", { name: /确认生成视频/ })
+    await expect(confirmBtn).toBeEnabled({ timeout: 5000 })
 
-    // ── Step 4: 确认生成 ──
-    // 等待实时预览就绪（占位消失）
-    await page
-      .getByText("准备预览素材")
-      .waitFor({ state: "detached", timeout: 30_000 })
-      .catch(() => {})
+    const createTask = page.waitForResponse(
+      (r) => r.url().includes("/generation/tasks") && r.request().method() === "POST",
+      { timeout: 30000 },
+    )
+    await confirmBtn.click()
+    const taskResp = await createTask
+    expect(taskResp.ok(), `Create task: ${await taskResp.text()}`).toBeTruthy()
+    const taskId = (await taskResp.json()).id ?? (await taskResp.json()).task_id
+    console.log("[random] Generation task created:", taskId)
+    await expect(page.getByText(/正在生成|提交/)).toBeVisible({ timeout: 15000 })
+    console.log("[random] Wizard flow completed ✓")
+  })
 
-    // Step 4 底部是「✨ 确认生成视频」
-    const confirmBtn = page.locator(".xx-step-actions .xx-btn-primary").first()
-    await expect(confirmBtn).toBeVisible({ timeout: 15_000 })
+  test("narrative mode: select script + mock TTS, create generation task", async ({
+    page,
+    request,
+  }) => {
+    test.setTimeout(600_000)
+    await page.setViewportSize({ width: 1440, height: 1000 })
+    const { token, suffix } = await setupFreshUser(request, "narrative")
 
-    // 先挂 API 监听再点击
-    const generatePromise = page.waitForResponse(
-      (response) => {
-        const url = response.url()
-        const path = new URL(url).pathname
-        return response.request().method() === "POST" && path.endsWith("/generation/tasks")
-      },
-      { timeout: 30_000 },
+    await page.addInitScript((t: string) => {
+      window.localStorage.setItem("access_token", t)
+      window.localStorage.setItem(
+        "auth-storage",
+        JSON.stringify({ state: { token: t, user: null } }),
+      )
+    }, token)
+    await routeBrowserApiToTestApi(page)
+
+    // ── Mock 文案列表、音色、TTS 合成（避免真实合成） ──────────────
+    const mockScriptId = `script-mock-${suffix}`
+    const mockVoiceId = `preset-voice-${suffix}`
+    const mockJobId = `tts-job-${suffix}`
+
+    // 文案列表（ScriptSelectModal 查询 /scripts）
+    await page.route("**/api/v1/scripts**", (route) => {
+      const url = new URL(route.request().url())
+      if (url.pathname.includes("/extract-from-douyin")) {
+        route.continue()
+        return
+      }
+      route.fulfill({
+        status: 200,
+        contentType: "application/json",
+        body: JSON.stringify({
+          items: [
+            {
+              id: mockScriptId,
+              title: "测试带货文案",
+              content: "这是一段测试用的带货文案内容，用于 E2E 冒烟测试。",
+              tags: ["带货"],
+              title_category: "daihuo",
+              created_at: new Date().toISOString(),
+              updated_at: new Date().toISOString(),
+            },
+          ],
+          total: 1,
+          page: 1,
+          page_size: 200,
+        }),
+      })
+    })
+
+    // 预设音色（TtsVoiceModal 查询 GET /voices/presets）
+    await page.route("**/api/v1/voices/presets**", (route) =>
+      route.fulfill({
+        status: 200,
+        contentType: "application/json",
+        body: JSON.stringify({
+          items: [
+            {
+              voice_id: mockVoiceId,
+              name: "晓晓（女声）",
+              description: "温柔女声",
+              gender: "female",
+              language: "zh-CN",
+              preview_url: null,
+              tags: ["温柔"],
+            },
+          ],
+          total: 1,
+        }),
+      }),
     )
 
-    await confirmBtn.click()
+    // 克隆音色：空列表
+    await page.route(
+      (url) => url.pathname.endsWith("/voice-clones"),
+      (route) =>
+        route.fulfill({
+          status: 200,
+          contentType: "application/json",
+          body: JSON.stringify({ items: [] }),
+        }),
+    )
 
-    // 验证生成 API 被调用
-    const genResp = await generatePromise.catch(() => null)
-    if (!genResp) {
-      // staging 预览未就绪导致按钮校验拦截，未触发 API — 向导导航仍通过
-      console.log(
-        "[E2E] Generation API not triggered (preview not ready) — wizard navigation verified",
-      )
-    } else if (genResp.ok()) {
-      const genData = (await genResp.json()) as {
-        items: Array<{ id: string; status: string }>
-        total: number
-      }
-      expect(genData.items.length).toBeGreaterThan(0)
+    // TTS 合成：直接返回 completed 任务
+    await page.route("**/api/v1/tts/synthesize", (route) =>
+      route.fulfill({
+        status: 200,
+        contentType: "application/json",
+        body: JSON.stringify({ job_id: mockJobId, status: "queued" }),
+      }),
+    )
+    await page.route(`**/api/v1/tts/jobs/${mockJobId}/status`, (route) =>
+      route.fulfill({
+        status: 200,
+        contentType: "application/json",
+        body: JSON.stringify({
+          job_id: mockJobId,
+          status: "completed",
+          progress: 100,
+          audio_url: "data:audio/mpeg;base64,",
+          duration: 5,
+        }),
+      }),
+    )
+    await page.route(`**/api/v1/tts/jobs/${mockJobId}/save-to-library`, (route) =>
+      route.fulfill({
+        status: 200,
+        contentType: "application/json",
+        body: JSON.stringify({ id: `tts-asset-${suffix}`, name: "AI合成配音" }),
+      }),
+    )
 
-      // race：渲染完成 vs 生成失败/超时
-      const downloadReady = page
-        .getByText("视频生成完成")
-        .isVisible({ timeout: 180_000 })
-        .then((v) => (v ? "completed" : null))
-      const generationFailed = page
-        .getByText(/生成失败|重新生成/)
-        .isVisible({ timeout: 180_000 })
-        .then((v) => (v ? "failed" : null))
-
-      const outcome = await Promise.any([downloadReady, generationFailed]).catch(() => "timeout")
-
-      if (outcome === "completed") {
-        await page.getByRole("button", { name: /下一步：选择封面/ }).click()
-        await expect(page.getByRole("heading", { name: /选择封面/ })).toBeVisible({
-          timeout: 30_000,
-        })
-      } else {
-        console.log(`[E2E] Video rendering ${outcome} on staging — wizard flow verified`)
-      }
-    } else {
-      console.log(`[E2E] Generate API returned ${genResp.status()}, wizard flow test still passes`)
-    }
-
-    // 验证成品库页面加载
-    await page.goto("/app/products")
-    await expect(page).toHaveURL(/\/app\/products/)
-    await expect(page.locator(".xx-products-page")).toBeVisible({ timeout: 15_000 })
-
-    await page.unrouteAll({ behavior: "ignoreErrors" })
-  })
-
-  test("generation task API creates and lists tasks", async ({ request }) => {
-    const suffix = Date.now().toString(36)
-    const email = `e2e-gen-api-${suffix}@example.com`
-    const username = `e2e_gen_api_${suffix}`
-
-    const register = await request.post(`${apiBase}/auth/register`, {
-      data: { email, username, password: PASSWORD, display_name: username },
+    await page.goto("/app/generate")
+    await expect(page.getByRole("heading", { name: "智能剪辑" })).toBeVisible({
+      timeout: 30000,
     })
-    expect(register.status()).toBe(201)
 
-    const login = await loginWithRetry(request, email, PASSWORD)
-    expect(login.status()).toBe(200)
-    const loginData = (await login.json()) as { access_token: string }
-    const headers = { Authorization: `Bearer ${loginData.access_token}` }
+    // ── Step 1：切到叙事剪辑 → 下一步 ────────────────────────────
+    await expect(page.getByText("选择模式", { exact: true })).toBeVisible()
+    await page.getByText("叙事剪辑").click()
+    await page.getByRole("button", { name: /下一步/ }).click()
 
-    const project = await request.post(`${apiBase}/projects`, {
-      headers,
-      data: { name: `E2E API Proj ${suffix}` },
-    })
-    expect(project.status()).toBe(200)
+    // ── 文案选择弹窗：选第一条 → 确认 ─────────────────────────────
+    await expect(page.getByText("📝 选择文案")).toBeVisible({ timeout: 5000 })
+    await page.getByText("测试带货文案").first().click()
+    await page.getByRole("button", { name: "确认选择" }).click()
+    await expect(page.getByText("📝 选择文案")).not.toBeVisible()
 
-    const tasks = await request.get(`${apiBase}/tasks`, { headers })
-    expect(tasks.status()).toBe(200)
-    const tasksData = await tasks.json()
-    expect(Array.isArray(tasksData.items)).toBe(true)
+    // ── TTS 音色弹窗：选系统音色 → 合成 ─────────────────────────
+    await expect(page.getByText("🎙️ 合成配音")).toBeVisible({ timeout: 5000 })
+    await page.getByText("晓晓（女声）").first().click()
+    await page.getByRole("button", { name: "🎧 合成配音" }).click()
+    await expect(page.getByText("🎙️ 合成配音")).not.toBeVisible({ timeout: 30000 })
+
+    // ── Step 2：AI 匹配提示卡可见 + 选素材 ────────────────────────
+    await expect(page.getByText("选择素材", { exact: true })).toBeVisible({ timeout: 10000 })
+    await expect(page.getByText(/AI智能匹配/)).toBeVisible()
+    await page.getByTestId("material-card").first().click()
+    await page.getByRole("button", { name: /下一步/ }).click()
+
+    // ── 数量弹窗 ─────────────────────────────────────────────────
+    await expect(page.getByText("要生成几个视频？")).toBeVisible({ timeout: 5000 })
+    await page.getByRole("button", { name: "生成 1 个视频" }).click()
+
+    // ── Step 3：填写标题（handleScriptModalConfirm 已预填 script.title，但我们再覆盖一次） ─
+    await expect(page.getByText("选择标题", { exact: true })).toBeVisible({ timeout: 10000 })
+    const titleInput2 = page.getByPlaceholder("输入或从标题库选择")
+    await expect(titleInput2).toBeVisible({ timeout: 5000 })
+    await titleInput2.fill(`测试叙事剪辑 ${suffix}`)
+    await page.getByRole("button", { name: /下一步/ }).click()
+
+    // ── Step 4：确认生成 ──────────────────────────────────────────
+    await expect(page.getByText("📋 生成配置")).toBeVisible({ timeout: 10000 })
+    await expect(page.getByText("叙事剪辑")).toBeVisible()
+    const confirmBtn2 = page.getByRole("button", { name: /确认生成视频/ })
+    await expect(confirmBtn2).toBeEnabled({ timeout: 5000 })
+
+    const createTask2 = page.waitForResponse(
+      (r) => r.url().includes("/generation/tasks") && r.request().method() === "POST",
+      { timeout: 30000 },
+    )
+    await confirmBtn2.click()
+    const taskResp2 = await createTask2
+    expect(taskResp2.ok(), `Create task: ${await taskResp2.text()}`).toBeTruthy()
+    console.log("[narrative] Generation task created:", (await taskResp2.json()).id)
+    await expect(page.getByText(/正在生成|提交/)).toBeVisible({ timeout: 15000 })
+    console.log("[narrative] Wizard flow completed ✓")
   })
 })

apps/web/e2e/core-navigation.spec.ts

@@ -0,0 +1,105 @@
+import { expect, test, type APIRequestContext, type Page } from "@playwright/test"
+
+const PASSWORD = "SmokePass123!"
+const apiBase = process.env.E2E_API_BASE || "/api/v1"
+const apiOrigin = apiBase.endsWith("/api/v1") ? apiBase.slice(0, -"/api/v1".length) : ""
+
+async function routeBrowserApiToTestApi(page: Page) {
+  if (!apiOrigin) return
+  await page.route("**/api/v1/**", async (route) => {
+    const sourceUrl = new URL(route.request().url())
+    const response = await route.fetch({
+      url: `${apiOrigin}${sourceUrl.pathname}${sourceUrl.search}`,
+    })
+    await route.fulfill({ response })
+  })
+}
+
+async function loginWithRetry(request: APIRequestContext, email: string, password: string) {
+  for (let i = 0; i <= 2; i++) {
+    const r = await request.post(`${apiBase}/auth/login`, { data: { email, password } })
+    if (r.status() !== 429) {
+      expect(r.ok(), `login: ${await r.text()}`).toBeTruthy()
+      return (await r.json()).access_token as string
+    }
+    console.log(`[nav] 429 retry ${i + 1}/2`)
+    await new Promise((res) => setTimeout(res, 65000))
+  }
+  throw new Error("Login retries exhausted")
+}
+
+/**
+ * 核心页面导航冒烟：侧边栏主要入口能访问、文案库/配音库页面能正常加载（不出白屏/无致命 js error）
+ */
+test.describe("Core Navigation", () => {
+  let authToken: string
+
+  test.beforeAll(async ({ request }) => {
+    const suffix = Math.random().toString(36).slice(2, 8)
+    const email = `e2e-nav-${suffix}@example.com`
+    await request.post(`${apiBase}/auth/register`, {
+      data: { email, password: PASSWORD, username: `e2e_nav_${suffix}` },
+    })
+    authToken = await loginWithRetry(request, email, PASSWORD)
+    const authHeader = { Authorization: `Bearer ${authToken}` }
+    const proj = await request.post(`${apiBase}/projects`, {
+      headers: authHeader,
+      data: { name: `Smoke Nav ${suffix}` },
+    })
+    if (proj.ok()) {
+      const projectId = (await proj.json()).id ?? (await proj.json()).project_id
+      await request.post(`${apiBase}/asset-libraries`, {
+        headers: authHeader,
+        data: { project_id: projectId, name: "Nav Lib", kind: "video" },
+      })
+    }
+  })
+
+  test.beforeEach(async ({ page }) => {
+    await page.setViewportSize({ width: 1440, height: 900 })
+    await page.addInitScript((t: string) => {
+      window.localStorage.setItem("access_token", t)
+      window.localStorage.setItem(
+        "auth-storage",
+        JSON.stringify({ state: { token: t, user: null } }),
+      )
+    }, authToken)
+    await routeBrowserApiToTestApi(page)
+  })
+
+  const navCases = [
+    { path: "/app/dashboard", marker: /概览|工作台|最近/i, name: "概览" },
+    { path: "/app/generate", marker: /智能剪辑|剪辑/, name: "智能剪辑" },
+    { path: "/app/assets", marker: /视频库|素材/, name: "视频库" },
+    { path: "/app/scripts", marker: /文案/, name: "文案库" },
+    { path: "/app/voices", marker: /配音|我的音色|配音库/, name: "配音库" },
+    { path: "/app/products", marker: /成品|作品/, name: "成品库" },
+    { path: "/app/history", marker: /历史|任务/, name: "任务历史" },
+    { path: "/app/tasks", marker: /任务中心|任务列表/, name: "任务中心" },
+    { path: "/app/points", marker: /积分|我的积分/, name: "积分中心" },
+  ]
+
+  for (const c of navCases) {
+    test(`visit ${c.name} (${c.path}) loads without fatal pageerror`, async ({ page }) => {
+      const errors: Error[] = []
+      page.on("pageerror", (e) => errors.push(e))
+      await page.goto(c.path)
+      await expect(page.locator("body")).not.toBeEmpty({ timeout: 20000 })
+      // 过滤掉常见第三方/非致命错误
+      const fatal = errors.filter(
+        (e) =>
+          !/ResizeObserver|Loading chunk|network error|Failed to fetch|chunkLoadError/i.test(
+            e.message,
+          ),
+      )
+      expect(fatal, `${c.name} pageerrors: ${fatal.map((e) => e.message).join("; ")}`).toHaveLength(
+        0,
+      )
+      await expect(
+        page.getByText(c.marker).first(),
+        `${c.name} should show relevant text`,
+      ).toBeVisible({ timeout: 15000 })
+      console.log(`[nav] ${c.name} loaded ✓`)
+    })
+  }
+})

apps/web/src/api/tasks/types.ts

@@ -71,6 +71,16 @@ export interface CreateGenerationTaskRequest {
   duration?: number
   /** 视频宽高比，如 "9:16" */
   video_ratio?: string
+  /** #1970：剪辑模式 random/narrative */
+  assembly_mode?: "random" | "narrative"
+  /** #1970：叙事模式下的文案 ID */
+  script_id?: string
+  /** #1970：TTS 音色 ID */
+  tts_voice_id?: string
+  /** #1970：TTS 音色来源 preset/clone */
+  tts_voice_source?: "preset" | "clone"
+  /** #1970：智能降重开关（默认 true） */
+  dedup_enabled?: boolean
   /** 标题烧录配置 */
   title_config?: {
     text?: string

apps/web/src/pages/generate/GeneratePage.tsx

@@ -11,6 +11,9 @@ import type { VoiceClone } from "@/api/voice-clone"
 import { useQuery } from "@tanstack/react-query"
 import { useCloneProgress } from "@/hooks/useCloneProgress"
 import CloneModal from "@/components/voice/CloneModal"
+import VoiceSelectModal from "./components/VoiceSelectModal"
+import ScriptSelectModal from "./components/ScriptSelectModal"
+import TtsVoiceModal from "./components/TtsVoiceModal"
 import GenerateHeader from "./components/GenerateHeader"
 import FrontendPreviewPlayer from "./components/FrontendPreviewPlayer"
 import CanvasPreviewGrid from "./components/CanvasPreviewGrid"
@@ -62,11 +65,26 @@ const GeneratePage: React.FC = () => {
     selectedVoice,
     setSelectedVoice,
     voiceMode,
+    setVoiceMode,
     selectedClonedVoice,
+    setSelectedClonedVoice,
+    editMode,
+    setEditMode,
+    selectedScript,
+    setSelectedScript,
+    ttsVoiceId,
+    setTtsVoiceId,
+    ttsVoiceSource,
+    setTtsVoiceSource,
+    ttsVoiceAssetId,
+    setTtsVoiceAssetId,
+    dedupEnabled,
+    setDedupEnabled,
 
     cloneModalOpen,
     setCloneModalOpen,
     videoRatio,
+    setVideoRatio,
     duration,
     style,
     autoSubtitles,
@@ -124,6 +142,11 @@ const GeneratePage: React.FC = () => {
   /* ── 数量选择弹窗 ── */
   const [countModalOpen, setCountModalOpen] = useState(false)
 
+  /* ── #1970 流程重构：分支弹窗 ── */
+  const [voiceModalOpen, setVoiceModalOpen] = useState(false)
+  const [scriptModalOpen, setScriptModalOpen] = useState(false)
+  const [ttsModalOpen, setTtsModalOpen] = useState(false)
+
   /* ── 标题样式回调 ── */
   const styleUpdaters = useTitleStyleUpdaters({
     titleSettings,
@@ -301,6 +324,12 @@ const GeneratePage: React.FC = () => {
     selectedClonedVoice,
     coverSettings,
     videoRatio,
+    editMode,
+    selectedScript,
+    ttsVoiceId,
+    ttsVoiceSource,
+    ttsVoiceAssetId,
+    dedupEnabled,
     style,
     duration,
     autoSubtitles,
@@ -340,7 +369,7 @@ const GeneratePage: React.FC = () => {
         return Array.from({ length: count }, (_, i) => list[i] ?? "")
       })
       setSelectedVariantIds(Array.from({ length: count }, (_, i) => i))
-      setCurrentStep(2)
+      setCurrentStep(3)
     },
     [
       setPreviewCount,
@@ -354,6 +383,58 @@ const GeneratePage: React.FC = () => {
     ],
   )
 
+  /* ── #1970：Step1 弹窗回调 ── */
+  const handleVoiceModalConfirm = useCallback(
+    (voiceAssetId: string) => {
+      setSelectedVoice(voiceAssetId)
+      setVoiceMode("custom")
+      setVoiceModalOpen(false)
+      setCurrentStep(2)
+    },
+    [setSelectedVoice, setVoiceMode, setCurrentStep],
+  )
+
+  const handleScriptModalConfirm = useCallback(
+    (script: import("@/api/scripts").ScriptItem) => {
+      setSelectedScript(script)
+      // 自动带入标题（若标题为空则预填）
+      if (!titleSettings.title?.trim() && script.title) {
+        setTitleSettings((prev) => ({ ...prev, title: script.title, aiAutoSelect: false }))
+      }
+      setScriptModalOpen(false)
+      // 自动打开 TTS 弹窗
+      setTtsModalOpen(true)
+    },
+    [setSelectedScript, setTitleSettings, titleSettings.title],
+  )
+
+  const handleTtsSynthesized = useCallback(
+    (payload: { voiceAssetId: string; ttsVoiceId: string; ttsVoiceSource: "preset" | "clone" }) => {
+      setTtsVoiceId(payload.ttsVoiceId)
+      setTtsVoiceSource(payload.ttsVoiceSource)
+      setTtsVoiceAssetId(payload.voiceAssetId)
+      if (payload.ttsVoiceSource === "clone") {
+        setSelectedClonedVoice(payload.ttsVoiceId)
+        setVoiceMode("clone")
+      } else {
+        setSelectedVoice(payload.ttsVoiceId)
+        setVoiceMode("preset")
+      }
+      setTtsModalOpen(false)
+      message.success("配音合成成功")
+      setCurrentStep(2)
+    },
+    [
+      setTtsVoiceId,
+      setTtsVoiceSource,
+      setTtsVoiceAssetId,
+      setSelectedVoice,
+      setSelectedClonedVoice,
+      setVoiceMode,
+      setCurrentStep,
+    ],
+  )
+
   /* ── 步骤3「确认生成视频」：校验通过 → 创建正式生成任务 → 跳步骤4看实时进展 ── */
   const handleConfirmGenerate = useCallback(async () => {
     // 积分预检查
@@ -412,12 +493,20 @@ const GeneratePage: React.FC = () => {
   const { goNext, goPrev } = useStepNavigation({
     currentStep,
     setCurrentStep,
+    editMode,
     materialMode,
     selectedMaterials,
     smartSelectedIds,
     titleSettings,
     generated,
     onOpenCountModal: () => setCountModalOpen(true),
+    onOpenStep1Modal: () => {
+      if (editMode === "random") {
+        setVoiceModalOpen(true)
+      } else {
+        setScriptModalOpen(true)
+      }
+    },
   })
 
   /* ── 最终成片 ── */
@@ -462,7 +551,7 @@ const GeneratePage: React.FC = () => {
             {!isBatch ? (
               <FrontendPreviewPlayer
                 assets={previewAssets}
-                videoRatio={videoRatio}
+                videoRatio={videoRatio as "9:16" | "16:9"}
                 ready={previewAssets.length > 0}
                 serverClips={serverClips}
                 voiceAudioUrl={previewVoiceAudioUrl || undefined}
@@ -497,7 +586,7 @@ const GeneratePage: React.FC = () => {
                 <CanvasPreviewGrid
                   count={previewCount}
                   assets={previewAssets}
-                  videoRatio={videoRatio}
+                  videoRatio={videoRatio as "9:16" | "16:9"}
                   titles={previewTitles}
                   titleSettings={titleSettings}
                   voiceAudioUrls={variantVoiceAudioUrls}
@@ -545,6 +634,16 @@ const GeneratePage: React.FC = () => {
             coverSettings={coverSettings}
             onCoverSettingsChange={setCoverSettings}
             selectedVoice={selectedVoice}
+            editMode={editMode}
+            onEditModeChange={setEditMode}
+            dedupEnabled={dedupEnabled}
+            onDedupEnabledChange={setDedupEnabled}
+            onPreviewCountChange={setPreviewCount}
+            videoRatio={videoRatio as "9:16" | "16:9"}
+            onVideoRatioChange={(r) => setVideoRatio(r)}
+            selectedScript={selectedScript}
+            ttsVoiceId={ttsVoiceId}
+            ttsVoiceSource={ttsVoiceSource}
             onSelectedVoiceChange={setSelectedVoice}
             onServerClipsChange={setServerClips}
             generating={generating}
@@ -671,6 +770,27 @@ const GeneratePage: React.FC = () => {
         onClose={() => setCloneModalOpen(false)}
         onSuccess={handleCloneSuccess}
       />
+
+      {/* #1970 流程弹窗 */}
+      <VoiceSelectModal
+        open={voiceModalOpen}
+        selectedVoice={selectedVoice}
+        onCancel={() => setVoiceModalOpen(false)}
+        onConfirm={handleVoiceModalConfirm}
+      />
+      <ScriptSelectModal
+        open={scriptModalOpen}
+        selectedScriptId={selectedScript?.id ?? null}
+        onCancel={() => setScriptModalOpen(false)}
+        onConfirm={handleScriptModalConfirm}
+      />
+      <TtsVoiceModal
+        open={ttsModalOpen}
+        scriptText={selectedScript?.content ?? ""}
+        scriptTitle={selectedScript?.title ?? ""}
+        onCancel={() => setTtsModalOpen(false)}
+        onSynthesized={handleTtsSynthesized}
+      />
     </div>
   )
 }

apps/web/src/pages/generate/components/GenerateStepContent.tsx

@@ -1,14 +1,16 @@
 /**
- * GeneratePage 步骤内容渲染（#1899 简化为 5 步，#1913 传递 selectedTemplate）
- * 步骤顺序：素材(1) → 配音(2) → 标题(3) → 确认生成(4) → 封面(5)
- * 步骤3预览（Canvas 网格）与步骤4进度（批量渲染网格）由 GeneratePage 直接渲染在左侧大区域。
+ * GeneratePage 步骤内容渲染（#1970 流程重构）
+ * 步骤顺序：选择模式(1) → 选择素材(2) → 选择标题(3) → 确认生成(4) → 选择封面(5)
+ * 原步骤"选择配音"已从主流程移除，改为 Step1 下一步分支弹窗（VoiceSelectModal / ScriptSelectModal → TtsVoiceModal）。
  */
 import React from "react"
 import type { EditPlanClip } from "@/api/template-editor"
 import type { CoverConfig } from "../types/cover"
 import type { TitleSettings } from "../types"
+import type { ScriptItem } from "@/api/scripts"
+import Step1EditMode from "./Step1EditMode"
+import type { EditMode } from "./Step1EditMode"
 import Step2MaterialSelect from "../components/Step2MaterialSelect"
-import Step3VoiceWithMode from "./Step3VoiceWithMode"
 import Step4TitleSettings from "../components/Step4TitleSettings"
 import Step6CoverSettings from "../components/Step6CoverSettings"
 import BatchGenerationGrid from "./BatchGenerationGrid"
@@ -17,19 +19,28 @@ import type { GeneratedVideo } from "@/api/template-editor"
 
 export interface GenerateStepContentProps {
   currentStep: number
-  /* 片段数量（#1899） */
+  /* Step1：剪辑模式 + 生成设置 */
+  editMode: EditMode
+  onEditModeChange: (m: EditMode) => void
+  dedupEnabled: boolean
+  onDedupEnabledChange: (v: boolean) => void
+  /* ── 片段数量（#1899） ── */
   clipCount: number
   onClipCountChange: (n: number) => void
-  /* 素材 */
+  /* ── 生成数量/比例（Step1 设置） ── */
+  previewCount: number
+  onPreviewCountChange: (n: number) => void
+  videoRatio: "9:16" | "16:9"
+  onVideoRatioChange: (r: "9:16" | "16:9") => void
+  /* ── 素材 ── */
   materialMode: "manual" | "auto"
   onMaterialModeChange: (mode: "manual" | "auto") => void
   selectedMaterials: string[]
   onSelectedMaterialsChange: (ids: string[]) => void
   smartSelectedIds: string[]
   onSmartSelectedIdsChange: (ids: string[]) => void
-  /* 当前选中的模板/草稿 ID；空串时由后端自动兜底（#1913） */
   selectedTemplate?: string
-  /* 标题 */
+  /* ── 标题 ── */
   titleSettings: TitleSettings
   onTitleSettingsChange: (settings: TitleSettings) => void
   onUpdatePosition: (position: string) => void
@@ -42,14 +53,14 @@ export interface GenerateStepContentProps {
   onApplyPreset: (presetKey: string) => void
   activePreset: string | null
   titlePresets: { key: string; label: string; previewStyle: React.CSSProperties }[]
-  /* 封面 */
+  /* ── 封面 ── */
   coverSettings: CoverConfig
   onCoverSettingsChange: (settings: CoverConfig) => void
-  /* 配音 */
+  /* ── 配音 ── */
   selectedVoice: string
   onSelectedVoiceChange: (id: string) => void
   onServerClipsChange: (clips: EditPlanClip[]) => void
-  /* 生成 */
+  /* ── 生成 ── */
   generating: boolean
   generated: boolean
   generateError: string | null
@@ -58,14 +69,10 @@ export interface GenerateStepContentProps {
   onRetry: () => void
   onRetryBatchTask: (taskId: string) => void
   onDismissError: () => void
-  /** 批量：每个正式生成任务的独立状态（步骤4进度网格） */
   batchTasks: BatchTaskState[]
-  /** BGM 开关 */
   bgm: boolean
-  /** BGM 配置 */
   bgmConfig?: { enabled: boolean; music_id?: string }
-  /* ── 批量生成（#1677）── */
-  previewCount: number
+  /* ── 批量生成 ── */
   previewTitles: string[]
   onPreviewTitlesChange: (titles: string[]) => void
   voiceModePerVideo: boolean
@@ -74,15 +81,27 @@ export interface GenerateStepContentProps {
   onVoiceLibraryIdsChange: (ids: string[]) => void
   previewCovers: string[]
   onPreviewCoversChange: (urls: string[]) => void
-  /** 批量模式勾选的变体索引 */
   selectedVariantIds?: number[]
+  /* ── 摘要信息（#1970 Step4 展示用） ── */
+  selectedScript: ScriptItem | null
+  ttsVoiceId: string
+  ttsVoiceSource: "preset" | "clone"
 }
 
 export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) => {
+  // Only destructure props actually referenced in JSX below
   const {
     currentStep,
+    editMode,
+    onEditModeChange,
+    dedupEnabled,
+    onDedupEnabledChange,
     clipCount,
     onClipCountChange,
+    previewCount,
+    onPreviewCountChange,
+    videoRatio,
+    onVideoRatioChange,
     materialMode,
     onMaterialModeChange,
     selectedMaterials,
@@ -104,31 +123,24 @@ export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) =
     titlePresets,
     coverSettings,
     onCoverSettingsChange,
-    selectedVoice,
-    onSelectedVoiceChange,
     onServerClipsChange,
     generating,
-    generated,
     generateError,
     progress,
     onRetry,
     generatedVideos,
     batchTasks,
     onRetryBatchTask,
-    previewCount,
     previewTitles,
     onPreviewTitlesChange,
-    voiceModePerVideo,
-    onVoiceModePerVideoChange,
-    voiceLibraryIds,
-    onVoiceLibraryIdsChange,
     previewCovers,
     onPreviewCoversChange,
     selectedVariantIds,
+    selectedScript,
+    ttsVoiceId,
+    ttsVoiceSource,
   } = props
 
-  // #1913：包装 onServerClipsChange，适配 hook 的 (clips, templateId?) 签名
-  // 如果 hook 传回了后端兜底创建的 templateId，同时通知外层更新 selectedTemplate
   const handleClipsChange = React.useCallback(
     (clips: EditPlanClip[], _templateId?: string) => {
       onServerClipsChange(clips)
@@ -138,8 +150,22 @@ export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) =
 
   switch (currentStep) {
     case 1:
+      return (
+        <Step1EditMode
+          editMode={editMode}
+          onEditModeChange={onEditModeChange}
+          previewCount={previewCount}
+          onPreviewCountChange={onPreviewCountChange}
+          videoRatio={videoRatio}
+          onVideoRatioChange={onVideoRatioChange}
+          dedupEnabled={dedupEnabled}
+          onDedupEnabledChange={onDedupEnabledChange}
+        />
+      )
+    case 2:
       return (
         <Step2MaterialSelect
+          editMode={editMode}
           materialMode={materialMode}
           onMaterialModeChange={onMaterialModeChange}
           selectedMaterials={selectedMaterials}
@@ -152,18 +178,6 @@ export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) =
           onServerClipsChange={handleClipsChange}
         />
       )
-    case 2:
-      return (
-        <Step3VoiceWithMode
-          previewCount={previewCount}
-          selectedVoice={selectedVoice}
-          onSelectedVoiceChange={onSelectedVoiceChange}
-          voiceModePerVideo={voiceModePerVideo}
-          onVoiceModePerVideoChange={onVoiceModePerVideoChange}
-          voiceLibraryIds={voiceLibraryIds}
-          onVoiceLibraryIdsChange={onVoiceLibraryIdsChange}
-        />
-      )
     case 3:
       return (
         <Step4TitleSettings
@@ -185,20 +199,49 @@ export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) =
         />
       )
     case 4:
-      /* 确认生成页：批量=逐任务进度网格；单视频=仅渲染进度/失败状态 */
-      if (previewCount > 1) {
-        return (
-          <BatchGenerationGrid
-            tasks={batchTasks}
-            titles={previewTitles}
-            onRetryTask={onRetryBatchTask}
-          />
-        )
-      }
-      if (generated && !generating && !generateError) return null
       return (
         <div className="xx-form-section">
-          {generating && (
+          {/* 配置摘要（#1970） */}
+          <div
+            style={{
+              padding: 14,
+              background: "#f9fafb",
+              borderRadius: 8,
+              marginBottom: 16,
+              fontSize: 13,
+              lineHeight: 1.8,
+              color: "#374151",
+            }}
+          >
+            <div style={{ fontWeight: 600, fontSize: 14, marginBottom: 6, color: "#111" }}>
+              📋 生成配置
+            </div>
+            <div>🎬 剪辑模式：{editMode === "random" ? "🎲 随机混剪" : "📖 叙事剪辑"}</div>
+            {editMode === "random" ? (
+              <div>🎙️ 配音来源：配音库音频</div>
+            ) : (
+              <>
+                <div>📝 文案：{selectedScript?.title ?? "未选择"}</div>
+                <div>
+                  🎙️ 合成配音音色：
+                  {ttsVoiceId
+                    ? `${ttsVoiceSource === "clone" ? "克隆音色" : "系统音色"}（${ttsVoiceId.slice(0, 8)}...）`
+                    : "未选择"}
+                </div>
+              </>
+            )}
+            <div>📱 视频比例：{videoRatio}</div>
+            <div>🎯 智能降重：{dedupEnabled ? "已开启" : "已关闭"}</div>
+            {previewCount > 1 && <div>📦 生成数量：{previewCount} 个</div>}
+          </div>
+
+          {previewCount > 1 ? (
+            <BatchGenerationGrid
+              tasks={batchTasks}
+              titles={previewTitles}
+              onRetryTask={onRetryBatchTask}
+            />
+          ) : generating ? (
             <div className="xx-gen-progress-card">
               <div className="xx-gen-progress-header">
                 <div className="xx-gen-progress-info">
@@ -217,8 +260,7 @@ export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) =
                 />
               </div>
             </div>
-          )}
-          {generateError && !generating && (
+          ) : generateError ? (
             <div className="xx-gen-error-card">
               <div className="xx-gen-error-info">
                 <div className="xx-gen-error-title">生成失败</div>
@@ -228,7 +270,7 @@ export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) =
                 🔄 重试
               </button>
             </div>
-          )}
+          ) : null}
         </div>
       )
     case 5:

apps/web/src/pages/generate/components/ScriptSelectModal.tsx

@@ -0,0 +1,243 @@
+/**
+ * 叙事剪辑 — 文案选择弹窗（#1970）
+ * - 搜索框：防抖 300ms，命中文字黄色高亮
+ * - 标签筛选行：全部/带货/工厂/测评/教程/口播/种草
+ * - 数量统计 + 卡片列表（可滚动，max-height 420px）
+ * - 调用 GET /api/v1/scripts?keyword=&tag=&page_size=200
+ */
+import React, { useState, useEffect, useMemo, useRef, useCallback } from "react"
+import { Modal, Input, Tag, Spin } from "antd"
+import { SearchOutlined, CheckCircleFilled } from "@ant-design/icons"
+import { useQuery } from "@tanstack/react-query"
+import { getScripts } from "@/api/scripts"
+import type { ScriptItem } from "@/api/scripts"
+
+interface ScriptSelectModalProps {
+  open: boolean
+  selectedScriptId: string | null
+  onCancel: () => void
+  onConfirm: (script: ScriptItem) => void
+}
+
+const SCRIPT_TABS = [
+  { key: "all", label: "全部" },
+  { key: "带货", label: "带货" },
+  { key: "工厂", label: "工厂" },
+  { key: "测评", label: "测评" },
+  { key: "教程", label: "教程" },
+  { key: "口播", label: "口播" },
+  { key: "种草", label: "种草" },
+]
+
+/** 在文本中用 <mark> 高亮关键词（黄色背景） */
+function highlight(text: string, keyword: string): React.ReactNode {
+  if (!keyword) return text
+  const idx = text.toLowerCase().indexOf(keyword.toLowerCase())
+  if (idx < 0) return text
+  return (
+    <>
+      {text.slice(0, idx)}
+      <mark style={{ background: "#fef08a", color: "#713f12", padding: "0 2px", borderRadius: 2 }}>
+        {text.slice(idx, idx + keyword.length)}
+      </mark>
+      {text.slice(idx + keyword.length)}
+    </>
+  )
+}
+
+const ScriptSelectModal: React.FC<ScriptSelectModalProps> = ({
+  open,
+  selectedScriptId,
+  onCancel,
+  onConfirm,
+}) => {
+  const [innerSelected, setInnerSelected] = useState<string | null>(selectedScriptId)
+  const [activeTag, setActiveTag] = useState<string>("all")
+  const [searchInput, setSearchInput] = useState("")
+  const [debouncedKw, setDebouncedKw] = useState("")
+  const debounceRef = useRef<ReturnType<typeof setTimeout> | null>(null)
+
+  useEffect(() => {
+    if (open) {
+      setInnerSelected(selectedScriptId)
+      setActiveTag("all")
+      setSearchInput("")
+      setDebouncedKw("")
+    }
+  }, [open, selectedScriptId])
+
+  // 300ms 防抖
+  useEffect(() => {
+    if (debounceRef.current) clearTimeout(debounceRef.current)
+    debounceRef.current = setTimeout(() => setDebouncedKw(searchInput.trim()), 300)
+    return () => {
+      if (debounceRef.current) clearTimeout(debounceRef.current)
+    }
+  }, [searchInput])
+
+  const { data, isLoading } = useQuery({
+    queryKey: ["scripts", "select-modal", debouncedKw, activeTag],
+    queryFn: () =>
+      getScripts({
+        page: 1,
+        page_size: 200,
+        keyword: debouncedKw || undefined,
+        tag: activeTag === "all" ? undefined : activeTag,
+      }),
+    enabled: open,
+  })
+
+  const scripts: ScriptItem[] = useMemo(() => data?.items ?? [], [data])
+  const selected = useMemo(
+    () => scripts.find((s) => s.id === innerSelected) ?? null,
+    [scripts, innerSelected],
+  )
+
+  const handleConfirm = useCallback(() => {
+    if (selected) onConfirm(selected)
+  }, [selected, onConfirm])
+
+  return (
+    <Modal
+      title="📝 选择文案"
+      open={open}
+      onCancel={onCancel}
+      onOk={handleConfirm}
+      okText="确认选择"
+      cancelText="取消"
+      okButtonProps={{ disabled: !selected, style: { background: "#7c3aed" } }}
+      width={680}
+      destroyOnClose
+    >
+      {/* 搜索 */}
+      <Input
+        allowClear
+        prefix={<SearchOutlined style={{ color: "#9ca3af" }} />}
+        placeholder="搜索标题、内容或标签"
+        value={searchInput}
+        onChange={(e) => setSearchInput(e.target.value)}
+        style={{ marginBottom: 12 }}
+      />
+
+      {/* 标签筛选 */}
+      <div style={{ display: "flex", flexWrap: "wrap", gap: 8, marginBottom: 12 }}>
+        {SCRIPT_TABS.map((t) => {
+          const active = activeTag === t.key
+          return (
+            <Tag
+              key={t.key}
+              onClick={() => setActiveTag(t.key)}
+              style={{
+                cursor: "pointer",
+                padding: "4px 14px",
+                borderRadius: 16,
+                border: active ? "1px solid #7c3aed" : "1px solid #e5e7eb",
+                background: active ? "#ede9fe" : "#fff",
+                color: active ? "#7c3aed" : "#4b5563",
+                margin: 0,
+                fontSize: 13,
+              }}
+            >
+              {t.label}
+            </Tag>
+          )
+        })}
+      </div>
+
+      {/* 数量统计 */}
+      <div style={{ fontSize: 12, color: "#6b7280", marginBottom: 8 }}>
+        共 {data?.total ?? scripts.length} 条文案
+      </div>
+
+      {/* 卡片列表 */}
+      <div style={{ maxHeight: 420, overflowY: "auto", paddingRight: 4 }}>
+        {isLoading ? (
+          <div style={{ textAlign: "center", padding: "40px 0" }}>
+            <Spin />
+          </div>
+        ) : scripts.length === 0 ? (
+          <div style={{ textAlign: "center", padding: "40px 0", color: "#9ca3af" }}>
+            暂无匹配文案
+          </div>
+        ) : (
+          <div style={{ display: "flex", flexDirection: "column", gap: 10 }}>
+            {scripts.map((s) => {
+              const isSel = innerSelected === s.id
+              const preview = (s.content || "").replace(/\s+/g, " ").slice(0, 80)
+              return (
+                <div
+                  key={s.id}
+                  onClick={() => setInnerSelected(s.id)}
+                  style={{
+                    padding: 14,
+                    borderRadius: 8,
+                    border: isSel ? "2px solid #7c3aed" : "1px solid #e5e7eb",
+                    background: isSel ? "#faf5ff" : "#fff",
+                    cursor: "pointer",
+                    transition: "all 0.2s",
+                    position: "relative",
+                  }}
+                >
+                  {isSel && (
+                    <CheckCircleFilled
+                      style={{
+                        position: "absolute",
+                        top: 12,
+                        right: 12,
+                        color: "#7c3aed",
+                        fontSize: 18,
+                      }}
+                    />
+                  )}
+                  <div
+                    style={{
+                      fontSize: 14,
+                      fontWeight: 600,
+                      color: isSel ? "#6d28d9" : "#111",
+                      marginBottom: 4,
+                      paddingRight: 24,
+                    }}
+                  >
+                    {highlight(s.title || "未命名", debouncedKw)}
+                  </div>
+                  <div
+                    style={{
+                      fontSize: 12,
+                      color: "#6b7280",
+                      lineHeight: 1.6,
+                      marginBottom: 8,
+                    }}
+                  >
+                    {highlight(preview + ((s.content || "").length > 80 ? "..." : ""), debouncedKw)}
+                  </div>
+                  {s.tags && s.tags.length > 0 && (
+                    <div style={{ display: "flex", gap: 4, flexWrap: "wrap" }}>
+                      {s.tags.slice(0, 5).map((tg) => (
+                        <Tag
+                          key={tg}
+                          style={{
+                            margin: 0,
+                            fontSize: 11,
+                            padding: "1px 8px",
+                            borderRadius: 10,
+                            background: "#f3f4f6",
+                            border: "none",
+                            color: "#6b7280",
+                          }}
+                        >
+                          {tg}
+                        </Tag>
+                      ))}
+                    </div>
+                  )}
+                </div>
+              )
+            })}
+          </div>
+        )}
+      </div>
+    </Modal>
+  )
+}
+
+export default ScriptSelectModal

apps/web/src/pages/generate/components/Step1EditMode.tsx

@@ -0,0 +1,264 @@
+/**
+ * Step 1 选择剪辑模式 + 生成设置（#1970 新流程第一步）
+ * - 剪辑模式：🎲随机混剪 / 📖叙事剪辑，二选一，选中紫底紫框
+ * - 生成设置：生成数量（-/+ 1-10 默认1）、视频比例（9:16/16:9 默认9:16）、智能降重开关（默认开）
+ */
+import React from "react"
+import { MinusOutlined, PlusOutlined } from "@ant-design/icons"
+
+export type EditMode = "random" | "narrative"
+
+interface Step1EditModeProps {
+  editMode: EditMode
+  onEditModeChange: (mode: EditMode) => void
+  /** 生成数量（1-10，默认1） */
+  previewCount: number
+  onPreviewCountChange: (n: number) => void
+  /** 视频比例 */
+  videoRatio: "9:16" | "16:9"
+  onVideoRatioChange: (ratio: "9:16" | "16:9") => void
+  /** 智能降重开关（默认 true） */
+  dedupEnabled: boolean
+  onDedupEnabledChange: (v: boolean) => void
+}
+
+const PURPLE = "#7c3aed"
+const PURPLE_BG = "linear-gradient(135deg, #ede9fe, #ddd6fe)"
+const PURPLE_BORDER = "2px solid #7c3aed"
+
+const MODE_CARDS: Array<{
+  key: EditMode
+  emoji: string
+  title: string
+  desc: string
+  features: string[]
+}> = [
+  {
+    key: "random",
+    emoji: "🎲",
+    title: "随机混剪",
+    desc: "根据配音时长随机抽取素材片段，灵活组合",
+    features: ["随机抽帧组合", "每次画面不同", "适合批量生成"],
+  },
+  {
+    key: "narrative",
+    emoji: "📖",
+    title: "叙事剪辑",
+    desc: "按文案内容匹配相关画面，有逻辑组织镜头",
+    features: ["画面匹配文案", "叙事感更强", "需要素材标签"],
+  },
+]
+
+const Step1EditMode: React.FC<Step1EditModeProps> = ({
+  editMode,
+  onEditModeChange,
+  previewCount,
+  onPreviewCountChange,
+  videoRatio,
+  onVideoRatioChange,
+  dedupEnabled,
+  onDedupEnabledChange,
+}) => {
+  return (
+    <div className="xx-form-section">
+      <h3>🎬 选择剪辑模式</h3>
+      <p style={{ color: "#666", fontSize: 14, marginBottom: 16 }}>
+        选择适合您的剪辑方式，后续流程会根据模式自动调整
+      </p>
+
+      <div
+        style={{
+          display: "grid",
+          gridTemplateColumns: "repeat(auto-fit, minmax(240px, 1fr))",
+          gap: 16,
+          marginBottom: 24,
+        }}
+      >
+        {MODE_CARDS.map((card) => {
+          const selected = editMode === card.key
+          return (
+            <div
+              key={card.key}
+              onClick={() => onEditModeChange(card.key)}
+              style={{
+                padding: 20,
+                borderRadius: 12,
+                border: selected ? PURPLE_BORDER : "1px solid #e5e7eb",
+                background: selected ? PURPLE_BG : "#fff",
+                cursor: "pointer",
+                transition: "all 0.2s",
+              }}
+            >
+              <div style={{ fontSize: 36, marginBottom: 8 }}>{card.emoji}</div>
+              <div
+                style={{
+                  fontSize: 18,
+                  fontWeight: 600,
+                  color: selected ? PURPLE : "#111",
+                  marginBottom: 6,
+                }}
+              >
+                {card.title}
+              </div>
+              <div style={{ fontSize: 13, color: "#666", marginBottom: 12 }}>{card.desc}</div>
+              <div style={{ display: "flex", flexDirection: "column", gap: 4 }}>
+                {card.features.map((f) => (
+                  <div key={f} style={{ fontSize: 12, color: selected ? "#6d28d9" : "#6b7280" }}>
+                    ✅ {f}
+                  </div>
+                ))}
+              </div>
+            </div>
+          )
+        })}
+      </div>
+
+      <h3 style={{ marginTop: 8 }}>⚙️ 生成设置</h3>
+
+      <div className="xx-form-field" style={{ marginTop: 12 }}>
+        <label>生成数量</label>
+        <div style={{ display: "flex", alignItems: "center", gap: 12 }}>
+          <div
+            style={{
+              display: "inline-flex",
+              alignItems: "center",
+              border: "1px solid #e5e7eb",
+              borderRadius: 8,
+              overflow: "hidden",
+              background: "#fff",
+            }}
+          >
+            <button
+              type="button"
+              onClick={() => onPreviewCountChange(Math.max(1, previewCount - 1))}
+              disabled={previewCount <= 1}
+              style={{
+                width: 36,
+                height: 36,
+                border: "none",
+                background: "transparent",
+                cursor: previewCount <= 1 ? "not-allowed" : "pointer",
+                color: previewCount <= 1 ? "#d1d5db" : "#374151",
+                fontSize: 16,
+              }}
+            >
+              <MinusOutlined />
+            </button>
+            <span
+              style={{
+                minWidth: 40,
+                textAlign: "center",
+                fontSize: 16,
+                fontWeight: 600,
+                color: "#111",
+              }}
+            >
+              {previewCount}
+            </span>
+            <button
+              type="button"
+              onClick={() => onPreviewCountChange(Math.min(10, previewCount + 1))}
+              disabled={previewCount >= 10}
+              style={{
+                width: 36,
+                height: 36,
+                border: "none",
+                background: "transparent",
+                cursor: previewCount >= 10 ? "not-allowed" : "pointer",
+                color: previewCount >= 10 ? "#d1d5db" : "#374151",
+                fontSize: 16,
+              }}
+            >
+              <PlusOutlined />
+            </button>
+          </div>
+          <span style={{ fontSize: 12, color: "#6b7280" }}>最多一次生成 10 个</span>
+        </div>
+      </div>
+
+      <div className="xx-form-field" style={{ marginTop: 16 }}>
+        <label>视频比例</label>
+        <div style={{ display: "flex", gap: 12, marginTop: 4 }}>
+          {[
+            { key: "9:16" as const, emoji: "📱", label: "竖屏 9:16" },
+            { key: "16:9" as const, emoji: "🖥️", label: "横屏 16:9" },
+          ].map((opt) => {
+            const selected = videoRatio === opt.key
+            return (
+              <button
+                key={opt.key}
+                type="button"
+                onClick={() => onVideoRatioChange(opt.key)}
+                style={{
+                  padding: "10px 20px",
+                  borderRadius: 8,
+                  border: selected ? PURPLE_BORDER : "1px solid #e5e7eb",
+                  background: selected ? PURPLE_BG : "#fff",
+                  color: selected ? PURPLE : "#374151",
+                  cursor: "pointer",
+                  fontSize: 14,
+                  fontWeight: selected ? 600 : 400,
+                  transition: "all 0.2s",
+                }}
+              >
+                {opt.emoji} {opt.label}
+              </button>
+            )
+          })}
+        </div>
+      </div>
+
+      <div
+        className="xx-form-field"
+        style={{
+          marginTop: 16,
+          padding: "12px 16px",
+          background: "#f9fafb",
+          borderRadius: 8,
+        }}
+      >
+        <div style={{ display: "flex", alignItems: "center", gap: 8 }}>
+          <span style={{ fontSize: 14, fontWeight: 500, color: "#111" }}>
+            🎯 智能降重 {dedupEnabled ? "已开启" : "已关闭"}
+          </span>
+          <button
+            type="button"
+            onClick={() => onDedupEnabledChange(!dedupEnabled)}
+            style={{
+              width: 44,
+              height: 24,
+              borderRadius: 12,
+              border: "none",
+              background: dedupEnabled ? PURPLE : "#d1d5db",
+              position: "relative",
+              cursor: "pointer",
+              transition: "background 0.2s",
+              padding: 0,
+              flexShrink: 0,
+            }}
+            aria-label="toggle dedup"
+          >
+            <span
+              style={{
+                position: "absolute",
+                top: 2,
+                left: dedupEnabled ? 22 : 2,
+                width: 20,
+                height: 20,
+                borderRadius: "50%",
+                background: "#fff",
+                transition: "left 0.2s",
+                boxShadow: "0 1px 3px rgba(0,0,0,0.2)",
+              }}
+            />
+          </button>
+        </div>
+        <div style={{ fontSize: 12, color: "#6b7280", marginTop: 4 }}>
+          自动对画面做微调，避免查重不过
+        </div>
+      </div>
+    </div>
+  )
+}
+
+export default Step1EditMode

apps/web/src/pages/generate/components/Step2MaterialSelect.tsx

@@ -11,6 +11,8 @@ import SmartMatchInput from "./material/SmartMatchInput"
 import SmartMatchResults from "./material/SmartMatchResults"
 
 interface Step2MaterialSelectProps {
+  /** 剪辑模式：random 随机混剪 / narrative 叙事剪辑（#1970） */
+  editMode?: "random" | "narrative"
   materialMode: "manual" | "auto"
   onMaterialModeChange: (mode: "manual" | "auto") => void
   selectedMaterials: string[]
@@ -43,6 +45,27 @@ const Step2MaterialSelect: React.FC<Step2MaterialSelectProps> = (props) => {
     <div className="xx-form-section">
       <h3>📦 选择素材</h3>
 
+      {/* 叙事剪辑：AI 智能匹配提示卡（#1970） */}
+      {props.editMode === "narrative" && (
+        <div
+          style={{
+            marginTop: 12,
+            padding: "12px 16px",
+            background: "linear-gradient(135deg,#ede9fe,#f5f3ff)",
+            border: "1px solid #c4b5fd",
+            borderRadius: 8,
+            fontSize: 13,
+            color: "#5b21b6",
+            display: "flex",
+            alignItems: "center",
+            gap: 8,
+          }}
+        >
+          <span style={{ fontSize: 18 }}>🤖</span>
+          <span>AI智能匹配：系统将根据您的文案内容，从素材库自动匹配合适的视频片段</span>
+        </div>
+      )}
+
       {/* 片段数量（#1899） */}
       <div className="xx-form-field" style={{ marginTop: 12 }}>
         <label>片段数量</label>

apps/web/src/pages/generate/components/TtsVoiceModal.tsx

@@ -0,0 +1,491 @@
+/**
+ * 叙事剪辑 — TTS 音色选择 + 合成配音弹窗（#1970）
+ * - Tabs：✨系统音色 / 🎙️我的克隆音色
+ * - 2列音色卡片（头像emoji+名称+描述+标签+▶试听+选中✓）
+ * - 底部：取消 / 🎧 合成配音（主按钮，必须选音色才能点）
+ * - 合成中：紫色 spinner + "正在合成配音..." + "请稍候，通常需要10-30秒"
+ * - 合成成功：保存到配音库并回调（voiceAssetId + ttsVoiceId + ttsVoiceSource）
+ *
+ * 复用现有 /api/tts 的 synthesizeSpeech + 轮询 getTTSJobStatus 逻辑；
+ * 不直接复用 TtsModal（它是页面配音弹窗，含文本输入/语速/情感等字段，叙事模式文本来自文案）。
+ */
+import React, { useState, useEffect, useMemo, useRef, useCallback } from "react"
+import { Modal, Tabs, Spin, message } from "antd"
+import { CheckCircleFilled, SoundOutlined } from "@ant-design/icons"
+import { useQuery } from "@tanstack/react-query"
+import { fetchPresetVoices } from "@/api/voices"
+import { getVoiceClones } from "@/api/voice-clone"
+import { synthesizeSpeech, getTTSJobStatus, saveTtsToLibrary } from "@/api/tts"
+import type { PresetVoiceItem } from "@/api/voices"
+import type { VoiceClone } from "@/api/voice-clone"
+import { VOICE_GENDER_ICON } from "../constants"
+
+interface TtsVoiceModalProps {
+  open: boolean
+  /** 需要合成的文本（来自选中的文案 content） */
+  scriptText: string
+  scriptTitle: string
+  onCancel: () => void
+  /** 合成成功回调：asset_id 为保存到配音库后的素材ID */
+  onSynthesized: (payload: {
+    voiceAssetId: string
+    ttsVoiceId: string
+    ttsVoiceSource: "preset" | "clone"
+  }) => void
+}
+
+type TtsSynthStatus = "idle" | "synthesizing" | "saving" | "done" | "error"
+
+const TtsVoiceModal: React.FC<TtsVoiceModalProps> = ({
+  open,
+  scriptText,
+  scriptTitle,
+  onCancel,
+  onSynthesized,
+}) => {
+  const [activeTab, setActiveTab] = useState<"preset" | "clone">("preset")
+  const [selectedVoiceId, setSelectedVoiceId] = useState<string>("")
+  const [status, setStatus] = useState<TtsSynthStatus>("idle")
+  const [error, setError] = useState<string | null>(null)
+  const [previewingId, setPreviewingId] = useState<string | null>(null)
+  const audioRef = useRef<HTMLAudioElement | null>(null)
+  const timerRef = useRef<ReturnType<typeof setInterval> | null>(null)
+
+  /* 系统音色 */
+  const { data: presetData } = useQuery({
+    queryKey: ["preset-voices", "modal"],
+    queryFn: fetchPresetVoices,
+    enabled: open,
+  })
+  const presetVoices: PresetVoiceItem[] = useMemo(() => presetData?.items ?? [], [presetData])
+
+  /* 克隆音色（仅 ready 状态可用） */
+  const { data: cloneListRaw = [] } = useQuery({
+    queryKey: ["voice-clones", "ready"],
+    queryFn: () => getVoiceClones({ status: "ready" }),
+    enabled: open,
+  })
+  const cloneVoices: VoiceClone[] = useMemo(
+    () => cloneListRaw.filter((v: VoiceClone) => v.status === "ready"),
+    [cloneListRaw],
+  )
+
+  /* 打开时重置状态 */
+  useEffect(() => {
+    if (open) {
+      setSelectedVoiceId("")
+      setStatus("idle")
+      setError(null)
+      setActiveTab("preset")
+    } else {
+      if (timerRef.current) {
+        clearInterval(timerRef.current)
+        timerRef.current = null
+      }
+      if (audioRef.current) {
+        audioRef.current.pause()
+        audioRef.current = null
+      }
+      setPreviewingId(null)
+    }
+    return () => {
+      if (timerRef.current) clearInterval(timerRef.current)
+    }
+  }, [open])
+
+  const handlePreview = useCallback(
+    (voiceId: string, previewUrl: string | null | undefined) => {
+      if (!previewUrl) {
+        message.info("该音色暂无试听音频")
+        return
+      }
+      if (previewingId === voiceId && audioRef.current) {
+        audioRef.current.pause()
+        setPreviewingId(null)
+        return
+      }
+      if (audioRef.current) audioRef.current.pause()
+      const a = new Audio(previewUrl)
+      audioRef.current = a
+      setPreviewingId(voiceId)
+      a.onended = () => {
+        setPreviewingId(null)
+        audioRef.current = null
+      }
+      a.play().catch(() => {
+        setPreviewingId(null)
+        audioRef.current = null
+      })
+    },
+    [previewingId],
+  )
+
+  const textToSynth = useMemo(() => {
+    // 文案内容取首段（过长会被 TTS 截断，保持和用户感知一致）
+    const t = (scriptText || "").trim()
+    return t.length > 500 ? t.slice(0, 500) : t
+  }, [scriptText])
+
+  const handleSynthesize = useCallback(async () => {
+    if (!selectedVoiceId) {
+      message.warning("请先选择一个音色")
+      return
+    }
+    if (!textToSynth) {
+      message.warning("文案内容为空，无法合成")
+      return
+    }
+    setStatus("synthesizing")
+    setError(null)
+    try {
+      const isClone = activeTab === "clone"
+      const payload: Record<string, unknown> = {
+        text: textToSynth,
+        speed: 1.0,
+        language: "zh-CN",
+      }
+      if (isClone) {
+        payload.voice_clone_profile_id = selectedVoiceId
+      } else {
+        payload.voice_id = selectedVoiceId
+      }
+      const resp = await synthesizeSpeech(
+        payload as unknown as Parameters<typeof synthesizeSpeech>[0],
+      )
+      const jobId = resp.job_id
+
+      await new Promise<void>((resolve, reject) => {
+        timerRef.current = setInterval(async () => {
+          try {
+            const job = await getTTSJobStatus(jobId)
+            if (job.status === "completed") {
+              if (timerRef.current) clearInterval(timerRef.current)
+              timerRef.current = null
+              resolve()
+            } else if (job.status === "failed") {
+              if (timerRef.current) clearInterval(timerRef.current)
+              timerRef.current = null
+              reject(new Error(job.error_message || "合成失败"))
+            }
+          } catch (e) {
+            if (timerRef.current) clearInterval(timerRef.current)
+            timerRef.current = null
+            reject(e)
+          }
+        }, 2000)
+      })
+
+      // 保存到配音库
+      setStatus("saving")
+      await saveTtsToLibrary(jobId, { name: scriptTitle?.slice(0, 30) || "AI合成配音" })
+      setStatus("done")
+
+      // 合成成功后回调；voiceAssetId 由后端在保存时产出，这里用 ttsVoiceId 占位，
+      // 父流程会在下一次 asset 列表刷新后重新选取；前端直接以 ttsVoiceId 为 key 传给后端
+      // （叙事模式后端通过 script_id + tts_voice_id 自行再合成，不依赖 asset_id）。
+      onSynthesized({
+        voiceAssetId: jobId,
+        ttsVoiceId: selectedVoiceId,
+        ttsVoiceSource: isClone ? "clone" : "preset",
+      })
+    } catch (err: unknown) {
+      setStatus("error")
+      const msg = err instanceof Error ? err.message : "合成失败，请稍后重试"
+      setError(msg)
+    }
+  }, [selectedVoiceId, textToSynth, activeTab, scriptTitle, onSynthesized])
+
+  const renderVoiceCard = (v: {
+    id: string
+    name: string
+    description?: string
+    gender?: string
+    tags?: string[]
+    preview_url?: string | null
+  }) => {
+    const isSel = selectedVoiceId === v.id
+    const isPlaying = previewingId === v.id
+    const emoji = v.gender ? (VOICE_GENDER_ICON[v.gender] ?? "🎤") : "🎤"
+    return (
+      <div
+        key={v.id}
+        onClick={() => setSelectedVoiceId(v.id)}
+        style={{
+          padding: 12,
+          borderRadius: 8,
+          border: isSel ? "2px solid #7c3aed" : "1px solid #e5e7eb",
+          background: isSel ? "#faf5ff" : "#fff",
+          cursor: "pointer",
+          transition: "all 0.2s",
+          position: "relative",
+        }}
+      >
+        {isSel && (
+          <CheckCircleFilled
+            style={{
+              position: "absolute",
+              top: 10,
+              right: 10,
+              color: "#7c3aed",
+            }}
+          />
+        )}
+        <div style={{ display: "flex", alignItems: "center", gap: 10, marginBottom: 8 }}>
+          <div
+            style={{
+              width: 36,
+              height: 36,
+              borderRadius: "50%",
+              background: isSel ? "linear-gradient(135deg,#7c3aed,#a78bfa)" : "#f3f4f6",
+              display: "flex",
+              alignItems: "center",
+              justifyContent: "center",
+              fontSize: 18,
+            }}
+          >
+            {emoji}
+          </div>
+          <div style={{ flex: 1, minWidth: 0 }}>
+            <div
+              style={{
+                fontSize: 14,
+                fontWeight: 600,
+                color: isSel ? "#6d28d9" : "#111",
+                overflow: "hidden",
+                textOverflow: "ellipsis",
+                whiteSpace: "nowrap",
+              }}
+            >
+              {v.name}
+            </div>
+            {v.description && (
+              <div
+                style={{
+                  fontSize: 11,
+                  color: "#6b7280",
+                  overflow: "hidden",
+                  textOverflow: "ellipsis",
+                  whiteSpace: "nowrap",
+                }}
+              >
+                {v.description}
+              </div>
+            )}
+          </div>
+          {v.preview_url && (
+            <button
+              type="button"
+              onClick={(e) => {
+                e.stopPropagation()
+                handlePreview(v.id, v.preview_url)
+              }}
+              style={{
+                width: 28,
+                height: 28,
+                borderRadius: "50%",
+                border: "none",
+                background: isPlaying ? "#ef4444" : "#7c3aed",
+                color: "#fff",
+                cursor: "pointer",
+                fontSize: 11,
+                display: "flex",
+                alignItems: "center",
+                justifyContent: "center",
+              }}
+            >
+              <SoundOutlined />
+            </button>
+          )}
+        </div>
+        {v.tags && v.tags.length > 0 && (
+          <div style={{ display: "flex", gap: 4, flexWrap: "wrap" }}>
+            {v.tags.slice(0, 3).map((tg) => (
+              <span
+                key={tg}
+                style={{
+                  fontSize: 10,
+                  padding: "1px 6px",
+                  borderRadius: 8,
+                  background: "#f3f4f6",
+                  color: "#6b7280",
+                }}
+              >
+                {tg}
+              </span>
+            ))}
+          </div>
+        )}
+      </div>
+    )
+  }
+
+  /* 合成中 loading 覆盖层 */
+  const renderSynthOverlay = () => {
+    if (status !== "synthesizing" && status !== "saving") return null
+    return (
+      <div
+        style={{
+          position: "absolute",
+          inset: 0,
+          background: "rgba(255,255,255,0.92)",
+          zIndex: 10,
+          display: "flex",
+          flexDirection: "column",
+          alignItems: "center",
+          justifyContent: "center",
+          gap: 12,
+          borderRadius: 8,
+        }}
+      >
+        <Spin size="large" style={{ color: "#7c3aed" }} />
+        <div style={{ fontSize: 16, fontWeight: 600, color: "#6d28d9" }}>
+          {status === "synthesizing" ? "正在合成配音..." : "正在保存到配音库..."}
+        </div>
+        <div style={{ fontSize: 12, color: "#6b7280" }}>请稍候，通常需要 10-30 秒</div>
+      </div>
+    )
+  }
+
+  return (
+    <Modal
+      title="🎙️ 合成配音"
+      open={open}
+      onCancel={status === "synthesizing" || status === "saving" ? undefined : onCancel}
+      cancelText="取消"
+      okText="🎧 合成配音"
+      okButtonProps={{
+        disabled: !selectedVoiceId || status === "synthesizing" || status === "saving",
+        style: { background: "#7c3aed" },
+      }}
+      onOk={handleSynthesize}
+      width={680}
+      destroyOnClose
+      confirmLoading={status === "synthesizing" || status === "saving"}
+    >
+      <div style={{ position: "relative" }}>
+        {error && (
+          <div
+            style={{
+              padding: "10px 12px",
+              background: "#fef2f2",
+              border: "1px solid #fecaca",
+              color: "#b91c1c",
+              borderRadius: 6,
+              fontSize: 13,
+              marginBottom: 12,
+            }}
+          >
+            {error}
+          </div>
+        )}
+
+        <div
+          style={{
+            fontSize: 12,
+            color: "#6b7280",
+            marginBottom: 12,
+            padding: "8px 12px",
+            background: "#f9fafb",
+            borderRadius: 6,
+          }}
+        >
+          将根据文案《{scriptTitle?.slice(0, 30) || "所选文案"}》合成配音，文本长度：
+          {textToSynth.length} 字
+        </div>
+
+        <Tabs
+          activeKey={activeTab}
+          onChange={(k) => {
+            setActiveTab(k as "preset" | "clone")
+            setSelectedVoiceId("")
+          }}
+          items={[
+            {
+              key: "preset",
+              label: "✨ 系统音色",
+              children: (
+                <div
+                  style={{
+                    display: "grid",
+                    gridTemplateColumns: "1fr 1fr",
+                    gap: 10,
+                    maxHeight: 420,
+                    overflowY: "auto",
+                    paddingRight: 4,
+                  }}
+                >
+                  {presetVoices.length === 0 ? (
+                    <div
+                      style={{
+                        gridColumn: "1/-1",
+                        textAlign: "center",
+                        padding: 30,
+                        color: "#9ca3af",
+                      }}
+                    >
+                      正在加载系统音色...
+                    </div>
+                  ) : (
+                    presetVoices.map((v) =>
+                      renderVoiceCard({
+                        id: v.voice_id,
+                        name: v.name,
+                        description: v.description,
+                        gender: v.gender,
+                        tags: v.tags,
+                        preview_url: v.preview_url,
+                      }),
+                    )
+                  )}
+                </div>
+              ),
+            },
+            {
+              key: "clone",
+              label: "🎙️ 我的克隆音色",
+              children: (
+                <div
+                  style={{
+                    display: "grid",
+                    gridTemplateColumns: "1fr 1fr",
+                    gap: 10,
+                    maxHeight: 420,
+                    overflowY: "auto",
+                    paddingRight: 4,
+                  }}
+                >
+                  {cloneVoices.length === 0 ? (
+                    <div
+                      style={{
+                        gridColumn: "1/-1",
+                        textAlign: "center",
+                        padding: 30,
+                        color: "#9ca3af",
+                      }}
+                    >
+                      暂无就绪的克隆音色，请先在配音库完成音色克隆
+                    </div>
+                  ) : (
+                    cloneVoices.map((v) =>
+                      renderVoiceCard({
+                        id: v.id,
+                        name: v.name,
+                        description: v.description,
+                        gender: "neutral",
+                        tags: ["克隆"],
+                        preview_url: v.sample_url || null,
+                      }),
+                    )
+                  )}
+                </div>
+              ),
+            },
+          ]}
+        />
+        {renderSynthOverlay()}
+      </div>
+    </Modal>
+  )
+}
+
+export default TtsVoiceModal

apps/web/src/pages/generate/components/VoiceSelectModal.tsx

@@ -0,0 +1,241 @@
+/**
+ * 随机混剪 — 配音选择弹窗（#1970）
+ * 内容复用 Step5VoiceSelect 的配音库音频卡片（图标+文件名+时长/大小+▶试听），
+ * 无 TTS / 克隆音色入口；确认后进入 Step2。
+ */
+import React from "react"
+import { Modal } from "antd"
+import { AudioOutlined } from "@ant-design/icons"
+import { useNavigate } from "react-router-dom"
+import { useQuery } from "@tanstack/react-query"
+import { useState, useRef, useCallback } from "react"
+import { getAssetsByKind } from "@/api/assets"
+import type { AssetItem } from "@/api/assets"
+
+interface VoiceSelectModalProps {
+  open: boolean
+  selectedVoice: string
+  onCancel: () => void
+  onConfirm: (voiceAssetId: string) => void
+}
+
+const getDuration = (item: AssetItem): number =>
+  item.duration ?? (item.metadata?.duration as number) ?? 0
+const getFileSize = (item: AssetItem): number =>
+  item.file_size ?? (item.metadata?.file_size as number) ?? 0
+const isAiVoice = (item: AssetItem): boolean => {
+  const d = getDuration(item)
+  const s = getFileSize(item)
+  return (!d || d <= 0) && (!s || s <= 0)
+}
+const fmtDur = (s?: number): string => {
+  if (!s || s <= 0) return "时长未知"
+  return `${s.toFixed(1)}秒`
+}
+const fmtSize = (b?: number): string => {
+  if (!b || b <= 0) return "未知"
+  if (b < 1024) return `${b} B`
+  if (b < 1024 * 1024) return `${(b / 1024).toFixed(1)} KB`
+  if (b < 1024 * 1024 * 1024) return `${(b / (1024 * 1024)).toFixed(1)} MB`
+  return `${(b / (1024 * 1024 * 1024)).toFixed(1)} GB`
+}
+
+const VoiceSelectModal: React.FC<VoiceSelectModalProps> = ({
+  open,
+  selectedVoice,
+  onCancel,
+  onConfirm,
+}) => {
+  const navigate = useNavigate()
+  const [innerSelected, setInnerSelected] = React.useState(selectedVoice)
+  const [playingId, setPlayingId] = useState<string | null>(null)
+  const audioRef = useRef<HTMLAudioElement | null>(null)
+
+  React.useEffect(() => {
+    if (open) setInnerSelected(selectedVoice)
+  }, [open, selectedVoice])
+
+  const { data: materials = [], isLoading } = useQuery({
+    queryKey: ["assets", "voice", "modal"],
+    queryFn: () => getAssetsByKind("voice", { limit: 50 }),
+    enabled: open,
+  })
+
+  const togglePlay = useCallback(
+    (item: AssetItem) => {
+      if (playingId === item.id && audioRef.current) {
+        audioRef.current.pause()
+        setPlayingId(null)
+        return
+      }
+      if (audioRef.current) audioRef.current.pause()
+      if (!item.file_url) return
+      const audio = new Audio(item.file_url)
+      audioRef.current = audio
+      setPlayingId(item.id)
+      audio.onended = () => {
+        setPlayingId(null)
+        audioRef.current = null
+      }
+      audio.play().catch(() => {
+        setPlayingId(null)
+        audioRef.current = null
+      })
+    },
+    [playingId],
+  )
+
+  const handleGoUpload = () => navigate("/app/voices?tab=material&upload=1")
+
+  const handleConfirm = () => {
+    if (!innerSelected) return
+    onConfirm(innerSelected)
+  }
+
+  return (
+    <Modal
+      title="🎙️ 选择配音"
+      open={open}
+      onCancel={onCancel}
+      onOk={handleConfirm}
+      okText="确认选择"
+      cancelText="取消"
+      okButtonProps={{ disabled: !innerSelected, style: { background: "#7c3aed" } }}
+      width={720}
+      destroyOnClose
+    >
+      <p style={{ color: "#666", fontSize: 13, marginBottom: 12 }}>
+        从配音库中选择已上传的音频素材，点击 ▶ 可试听
+      </p>
+      {isLoading ? (
+        <div style={{ textAlign: "center", padding: "40px 0", color: "#999" }}>加载中...</div>
+      ) : materials.length === 0 ? (
+        <div style={{ textAlign: "center", padding: "40px 0", color: "#999" }}>
+          <AudioOutlined style={{ fontSize: 48, color: "#d9d9d9", marginBottom: 12 }} />
+          <p style={{ marginBottom: 12 }}>暂无配音素材</p>
+          <button
+            type="button"
+            onClick={handleGoUpload}
+            style={{
+              padding: "8px 20px",
+              background: "#7c3aed",
+              color: "#fff",
+              border: "none",
+              borderRadius: 6,
+              cursor: "pointer",
+            }}
+          >
+            去配音库上传
+          </button>
+        </div>
+      ) : (
+        <div
+          style={{
+            display: "grid",
+            gridTemplateColumns: "repeat(auto-fill, minmax(200px, 1fr))",
+            gap: 12,
+            maxHeight: 460,
+            overflowY: "auto",
+            paddingRight: 4,
+          }}
+        >
+          {materials.map((item) => {
+            const isSel = innerSelected === item.id
+            const isPlaying = playingId === item.id
+            return (
+              <div
+                key={item.id}
+                onClick={() => setInnerSelected(item.id)}
+                style={{
+                  padding: 14,
+                  borderRadius: 8,
+                  border: isSel ? "2px solid #7c3aed" : "1px solid #e8e8e8",
+                  background: isSel ? "#ede9fe" : "#fff",
+                  cursor: "pointer",
+                  transition: "all 0.2s",
+                }}
+              >
+                <div
+                  style={{
+                    display: "flex",
+                    alignItems: "center",
+                    justifyContent: "space-between",
+                  }}
+                >
+                  <div
+                    style={{
+                      width: 36,
+                      height: 36,
+                      borderRadius: 8,
+                      background: isSel
+                        ? "linear-gradient(135deg,#7c3aed,#a78bfa)"
+                        : "linear-gradient(135deg,#f0f0f0,#e8e8e8)",
+                      display: "flex",
+                      alignItems: "center",
+                      justifyContent: "center",
+                    }}
+                  >
+                    <AudioOutlined style={{ color: isSel ? "#fff" : "#666" }} />
+                  </div>
+                  {item.file_url && (
+                    <button
+                      type="button"
+                      onClick={(e) => {
+                        e.stopPropagation()
+                        togglePlay(item)
+                      }}
+                      style={{
+                        width: 30,
+                        height: 30,
+                        borderRadius: "50%",
+                        border: "none",
+                        background: isPlaying ? "#ef4444" : "#7c3aed",
+                        color: "#fff",
+                        cursor: "pointer",
+                        fontSize: 12,
+                      }}
+                    >
+                      ▶
+                    </button>
+                  )}
+                </div>
+                <div
+                  style={{
+                    fontSize: 13,
+                    fontWeight: 500,
+                    marginTop: 8,
+                    overflow: "hidden",
+                    textOverflow: "ellipsis",
+                    whiteSpace: "nowrap",
+                    color: isSel ? "#6d28d9" : "#333",
+                  }}
+                  title={item.name}
+                >
+                  {item.name}
+                </div>
+                <div
+                  style={{
+                    display: "flex",
+                    justifyContent: "space-between",
+                    fontSize: 11,
+                    color: "#999",
+                    marginTop: 4,
+                  }}
+                >
+                  {isAiVoice(item) ? (
+                    <span style={{ color: "#7c3aed", fontWeight: 500 }}>AI 音色</span>
+                  ) : (
+                    <span>{fmtDur(getDuration(item))}</span>
+                  )}
+                  <span>{isAiVoice(item) ? "按文本合成" : fmtSize(getFileSize(item))}</span>
+                </div>
+              </div>
+            )
+          })}
+        </div>
+      )}
+    </Modal>
+  )
+}
+
+export default VoiceSelectModal

apps/web/src/pages/generate/constants.ts

@@ -27,10 +27,10 @@ export const VOICE_GENDER_ICON: Record<string, string> = {
   neutral: "✨",
 }
 
-/* ── 步骤定义（5步，#1899 简化：删除选模板步骤） ── */
+/* ── 步骤定义（5步，#1970 流程重构：选择模式 → 素材 → 标题 → 确认 → 封面） ── */
 export const STEPS = [
-  { key: 1, label: "选择素材" },
-  { key: 2, label: "选择配音" },
+  { key: 1, label: "选择模式" },
+  { key: 2, label: "选择素材" },
   { key: 3, label: "选择标题" },
   { key: 4, label: "确认生成" },
   { key: 5, label: "选择封面" },

apps/web/src/pages/generate/hooks/generate-video/buildPayload.ts

@@ -1,7 +1,9 @@
 import type { UseGenerateVideoProps } from "./types"
 
 /**
- * 生成前置校验
+ * 生成前置校验（#1970 适配新流程）
+ * - 随机混剪：需选配音（selectedVoice，配音库音频）
+ * - 叙事剪辑：需选文案 + TTS 音色
  * 返回错误信息，通过则返回 null
  */
 export const validateGenerateInputs = (props: UseGenerateVideoProps): string | null => {
@@ -12,19 +14,30 @@ export const validateGenerateInputs = (props: UseGenerateVideoProps): string | n
     smartSelectedIds,
     voiceMode,
     selectedClonedVoice,
+    editMode = "random",
+    selectedScript,
+    ttsVoiceId,
+    selectedVoice,
   } = props
 
-  // AI 自动选择模式下，标题可以为空（后端会自行生成）
   if (!titleSettings.aiAutoSelect && !titleSettings.title?.trim()) {
     return "请先选择或输入标题"
   }
-  // 无论手动还是自动模式，都必须有素材
   const materialIds = materialMode === "auto" ? smartSelectedIds || [] : selectedMaterials || []
   if (materialIds.length === 0) {
     return materialMode === "auto" ? "AI 未匹配到素材，请手动选择素材后重试" : "请至少选择一个素材"
   }
-  if (voiceMode === "clone" && !selectedClonedVoice) {
-    return "请先选择一个克隆音色"
+  if (editMode === "narrative") {
+    if (!selectedScript?.id) return "请先选择文案"
+    if (!ttsVoiceId) return "请先合成配音"
+  } else {
+    // 随机混剪：配音库音频
+    if (!selectedVoice && voiceMode !== "clone") {
+      return "请先选择配音"
+    }
+    if (voiceMode === "clone" && !selectedClonedVoice) {
+      return "请先选择一个克隆音色"
+    }
   }
   return null
 }

apps/web/src/pages/generate/hooks/generate-video/types.ts

@@ -13,7 +13,19 @@ export interface UseGenerateVideoProps {
   selectedVoice: string
   selectedClonedVoice: string
   coverSettings: CoverConfig
-  videoRatio: string
+  videoRatio: "9:16" | "16:9" | string
+  /** #1970 剪辑模式 */
+  editMode?: "random" | "narrative"
+  /** 叙事模式下选中的文案 */
+  selectedScript?: { id: string; title?: string; content?: string } | null
+  /** TTS 音色 ID（叙事模式） */
+  ttsVoiceId?: string
+  /** TTS 音色来源 */
+  ttsVoiceSource?: "preset" | "clone"
+  /** 合成后保存到配音库的 asset id / job id（叙事模式） */
+  ttsVoiceAssetId?: string
+  /** 智能降重开关（默认 true） */
+  dedupEnabled?: boolean
   style: string
   duration: number
   autoSubtitles: boolean

apps/web/src/pages/generate/hooks/useGenerateFormState/index.ts

@@ -12,6 +12,7 @@ import { getEditingTemplates } from "@/api/editing-planner"
 import type { EditPlanClip } from "@/api/template-editor"
 import type { CoverConfig } from "../../types/cover"
 import type { PresetVoiceItem } from "@/api/voices"
+import type { ScriptItem } from "@/api/scripts"
 import { DEFAULT_COVER_SETTINGS, DEFAULT_CLIP_COUNT } from "../../constants"
 import type { TitleSettings } from "../../types"
 import { usePlanConfigLoader } from "./usePlanConfigLoader"
@@ -82,8 +83,28 @@ export interface GenerateFormState {
   cloneModalOpen: boolean
   setCloneModalOpen: (open: boolean) => void
 
+  /* ── 剪辑模式（#1970 流程重构）── */
+  editMode: "random" | "narrative"
+  setEditMode: (mode: "random" | "narrative") => void
+  /** 叙事模式下选中的文案 */
+  selectedScript: ScriptItem | null
+  setSelectedScript: (s: ScriptItem | null) => void
+  /** TTS 音色 ID */
+  ttsVoiceId: string
+  setTtsVoiceId: (id: string) => void
+  /** TTS 音色来源：preset 系统 / clone 克隆 */
+  ttsVoiceSource: "preset" | "clone"
+  setTtsVoiceSource: (src: "preset" | "clone") => void
+  /** 合成后配音库 asset id（叙事模式保存到库后获得；随机模式 = selectedVoice） */
+  ttsVoiceAssetId: string
+  setTtsVoiceAssetId: (id: string) => void
+  /** 智能降重开关（默认 true） */
+  dedupEnabled: boolean
+  setDedupEnabled: (v: boolean) => void
+
   /* 高级设置 */
-  videoRatio: string
+  videoRatio: "9:16" | "16:9" | string
+  setVideoRatio: (r: "9:16" | "16:9") => void
   duration: number
   style: string
   autoSubtitles: boolean
@@ -201,13 +222,21 @@ export const useGenerateFormState = (): GenerateFormState => {
   /* ── 克隆声音弹窗 ── */
   const [cloneModalOpen, setCloneModalOpen] = useState(false)
 
-  /* ── 高级设置（隐藏但保留） ── */
-  const [videoRatio] = useState("9:16")
+  /* ── 高级设置 ── */
+  const [videoRatio, setVideoRatio] = useState<"9:16" | "16:9">("9:16")
   const [duration] = useState(30)
   const [style] = useState("business")
   const [autoSubtitles] = useState(true)
   const [bgm] = useState(true)
 
+  /* ── 剪辑模式状态（#1970） ── */
+  const [editMode, setEditMode] = useState<"random" | "narrative">("random")
+  const [selectedScript, setSelectedScript] = useState<ScriptItem | null>(null)
+  const [ttsVoiceId, setTtsVoiceId] = useState<string>("")
+  const [ttsVoiceSource, setTtsVoiceSource] = useState<"preset" | "clone">("preset")
+  const [ttsVoiceAssetId, setTtsVoiceAssetId] = useState<string>("")
+  const [dedupEnabled, setDedupEnabled] = useState<boolean>(true)
+
   /* ── 预览任务 ID ── */
   const previewStorageKey = editPlanId
     ? `preview_task_id_${editPlanId}`
@@ -274,9 +303,22 @@ export const useGenerateFormState = (): GenerateFormState => {
     selectedClonedVoice,
     setSelectedClonedVoice,
     presetVoices,
+    editMode,
+    setEditMode,
+    selectedScript,
+    setSelectedScript,
+    ttsVoiceId,
+    setTtsVoiceId,
+    ttsVoiceSource,
+    setTtsVoiceSource,
+    ttsVoiceAssetId,
+    setTtsVoiceAssetId,
+    dedupEnabled,
+    setDedupEnabled,
     cloneModalOpen,
     setCloneModalOpen,
     videoRatio,
+    setVideoRatio,
     duration,
     style,
     autoSubtitles,

apps/web/src/pages/generate/hooks/useGenerateVideo.ts

@@ -123,6 +123,8 @@ export function useGenerateVideo(props: UseGenerateVideoProps) {
       const { width: outputWidth, height: outputHeight } = calculateResolution(
         props.videoRatio || "9:16",
       )
+      const editMode = props.editMode ?? "random"
+      const dedupEnabled = props.dedupEnabled !== false
 
       const assetIds =
         props.materialMode === "auto" ? props.smartSelectedIds : props.selectedMaterials
@@ -151,10 +153,13 @@ export function useGenerateVideo(props: UseGenerateVideoProps) {
 
       const coverUrl = props.coverSettings?.thumbnail_url || props.coverSettings?.upload_url || ""
 
+      // #1970：叙事模式下 ttsVoiceId 作为配音 id；随机模式用 selectedVoice
       const voiceLibraryId =
-        props.voiceMode === "clone"
-          ? props.selectedClonedVoice || props.selectedVoice || ""
-          : props.selectedVoice || ""
+        editMode === "narrative"
+          ? props.ttsVoiceId || ""
+          : props.voiceMode === "clone"
+            ? props.selectedClonedVoice || props.selectedVoice || ""
+            : props.selectedVoice || ""
 
       /* ── 批量变体数组（长度1=共用，长度=count=独立，空=回退单值） ── */
       const indexes =
@@ -197,6 +202,15 @@ export function useGenerateVideo(props: UseGenerateVideoProps) {
           custom_title: props.titleSettings?.title || "",
           duration: props.duration || undefined,
           video_ratio: props.videoRatio,
+          assembly_mode: editMode,
+          ...(editMode === "narrative" && props.selectedScript?.id
+            ? {
+                script_id: props.selectedScript.id,
+                tts_voice_id: props.ttsVoiceId || undefined,
+                tts_voice_source: props.ttsVoiceSource || undefined,
+              }
+            : {}),
+          dedup_enabled: dedupEnabled,
           voice_library_id: voiceLibraryId,
           ...(props.selectedVoice && !voiceLibraryId ? { voice_ids: [props.selectedVoice] } : {}),
           bgm_config: {

apps/web/src/pages/generate/hooks/useStepNavigation.ts

@@ -1,17 +1,22 @@
 /**
- * GeneratePage 步骤导航（#1899 简化为 5 步，单视频与批量一致）
- * 步骤：素材(1) → 配音(2) → 标题(3) → 确认生成(4) → 封面(5)
+ * GeneratePage 步骤导航（#1970 流程重构）
+ * 步骤：选择模式(1) → 选择素材(2) → 选择标题(3) → 确认生成(4) → 选择封面(5)
  *
- * - 步骤3底部按钮是「确认生成视频」（由 GenerateStepActions 调 onConfirmGenerate），
- *   创建成功后跳转步骤4；本 hook 的 goNext 只负责 1→2→3 和 4→5 的「下一步」。
- * - 步骤4（确认生成进度页）：渲染全部完成（generated）后「下一步」解锁进封面。
+ * - 步骤1（选择模式）：下一步分支由外层弹窗处理（VoiceSelectModal / ScriptSelectModal），
+ *   本 hook 的 goNext 仅在未选模式时拦截；外层 Modal onConfirm 里主动 setCurrentStep(2)。
+ * - 步骤2（选择素材）：弹数量选择弹窗（PreviewCountModal），确认后跳步骤3。
+ * - 步骤3 底部按钮是「确认生成视频」（由 GenerateStepActions 调 onConfirmGenerate），
+ *   创建成功后跳步骤4；本 hook 的 goNext 只负责 2→3 和 4→5 的「下一步」。
+ * - 步骤4（确认生成进度页）：全部渲染完成后「下一步」解锁进封面。
  */
 import { message } from "antd"
 import type { TitleSettings } from "../types"
+import type { EditMode } from "../components/Step1EditMode"
 
 export interface UseStepNavigationOptions {
   currentStep: number
   setCurrentStep: (step: number | ((prev: number) => number)) => void
+  editMode: EditMode
   materialMode: "manual" | "auto"
   selectedMaterials: string[]
   smartSelectedIds: string[]
@@ -20,6 +25,8 @@ export interface UseStepNavigationOptions {
   generated: boolean
   /** 点素材下一步时弹出数量选择弹窗 */
   onOpenCountModal: () => void
+  /** 步骤1下一步：根据 editMode 打开对应弹窗（随机→配音 / 叙事→文案） */
+  onOpenStep1Modal: () => void
 }
 
 export interface UseStepNavigationReturn {
@@ -36,22 +43,29 @@ export const useStepNavigation = (options: UseStepNavigationOptions): UseStepNav
     smartSelectedIds,
     generated,
     onOpenCountModal,
+    onOpenStep1Modal,
   } = options
 
   const goNext = () => {
     if (currentStep === 1) {
-      // 选完素材弹数量选择弹窗
+      // 步骤1：先校验素材/配音等由弹窗负责，goNext 只负责触发弹窗
+      onOpenStep1Modal()
+      return
+    }
+    if (currentStep === 2) {
+      // 素材校验
+      if (materialMode === "manual" && selectedMaterials.length === 0) {
+        message.warning("请至少选择一个素材")
+        return
+      }
+      if (materialMode === "auto" && smartSelectedIds.length === 0) {
+        message.warning("请先进行智能匹配并选择素材")
+        return
+      }
+      // 弹数量选择弹窗
       onOpenCountModal()
       return
     }
-    if (currentStep === 1 && materialMode === "manual" && selectedMaterials.length === 0) {
-      message.warning("请至少选择一个素材")
-      return
-    }
-    if (currentStep === 1 && materialMode === "auto" && smartSelectedIds.length === 0) {
-      message.warning("请先进行智能匹配并选择素材")
-      return
-    }
     // 步骤4（确认生成）：全部渲染完成后才能下一步进封面
     if (currentStep === 4) {
       if (!generated) {

apps/worker/video_processing/micro_transform_pure.py

@@ -0,0 +1,176 @@
+"""智能降重微变换纯逻辑模块 — #1970 PR2.
+
+所有函数均为纯函数：不调用 FFmpeg、不读写文件，只负责按可复现种子
+生成每个片段 / 整片的微变换参数与 filter_complex 片段。
+
+6 个维度：
+1. hflip 水平翻转（每片段 50%，有字幕/文字的片段不翻转）
+2. 播放速度 0.97~1.03x（视频 setpts + 音频 atempo）
+3. 亮度 ±2%（eq=brightness）
+4. 对比度 ±2%（eq=contrast）
+5. 饱和度 ±2%（eq=saturation）
+6. BGM 起始偏移 2~8 秒（音频 atrim 起点）
+
+随机种子 = hash(task_id + video_index) % 10000，保证同一任务同一视频
+可复现；dedup_enabled=False 时不生成本模块任何输出。
+"""
+
+from __future__ import annotations
+
+import random
+from dataclasses import dataclass, field
+
+# ── 常量（与需求文档 §2 对齐）──────────────────────────────────────────────────
+
+SPEED_MIN = 0.97
+SPEED_MAX = 1.03
+COLOR_DELTA = 0.02
+HFLIP_PROBABILITY = 0.5
+BGM_OFFSET_MIN = 2.0
+BGM_OFFSET_MAX = 8.0
+SEED_MODULO = 10000
+
+
+def make_video_seed(task_id: str, video_index: int) -> int:
+    """生成视频级可复现种子：hash(task_id+video_index) % 10000。
+
+    用 sha256 而非内置 hash()：内置 hash 对字符串带进程级随机盐（PYTHONHASHSEED），
+    跨进程不可复现。结果映射到 0~9999。
+    """
+    import hashlib
+
+    raw = f"{task_id or ''}:{int(video_index)}"
+    digest = hashlib.sha256(raw.encode("utf-8")).hexdigest()
+    return int(digest[:8], 16) % SEED_MODULO
+
+
+@dataclass(slots=True)
+class ClipMicroTransform:
+    """单个片段的微变换参数。"""
+
+    clip_index: int
+    hflip: bool = False
+    speed: float = 1.0
+    brightness: float = 0.0
+    contrast: float = 1.0
+    saturation: float = 1.0
+    has_text: bool = False
+
+    def video_filter_suffix(self) -> str:
+        """返回追加在片段视频处理链上的 filter 后缀（无末尾标签）。
+
+        顺序：trim/setpts（已有）→ 调速 setpts → hflip → eq → format。
+        调速的 setpts 必须位于 trim 之后；hflip/eq 在缩放之后即可，
+        concat_engine 按「调速 → hflip → eq」顺序拼接到 scale/fps 之前的
+        trim 之后、scale 之后均可，这里只产出独立步骤、由引擎决定插入点。
+        """
+        parts: list[str] = []
+        # 速度：setpts=PTS/speed（speed>1 时画面加速，时间戳变小）
+        if abs(self.speed - 1.0) > 1e-4:
+            parts.append(f"setpts=PTS/{self.speed:.5f}")
+        # 水平翻转：有文字/字幕片段不翻转
+        if self.hflip and not self.has_text:
+            parts.append("hflip")
+        # 色彩微调：brightness 取值 -1~1（±0.02），contrast/saturation 围绕 1.0
+        if abs(self.brightness) > 1e-4 or abs(self.contrast - 1.0) > 1e-4 or abs(self.saturation - 1.0) > 1e-4:
+            parts.append(
+                f"eq=brightness={self.brightness:+.4f}:"
+                f"contrast={self.contrast:.4f}:saturation={self.saturation:.4f}"
+            )
+        return ",".join(parts)
+
+    def audio_filter_suffix(self) -> str:
+        """返回片段音频链上的调速 filter（atempo），无调速时返回空串。"""
+        if abs(self.speed - 1.0) <= 1e-4:
+            return ""
+        return f"atempo={self.speed:.5f}"
+
+
+@dataclass(slots=True)
+class VideoMicroTransformPlan:
+    """一个成片视频的全部微变换参数。"""
+
+    task_id: str
+    video_index: int
+    seed: int
+    clips: list[ClipMicroTransform] = field(default_factory=list)
+    bgm_start_offset: float = 0.0
+
+    def clip(self, index: int) -> ClipMicroTransform | None:
+        for c in self.clips:
+            if c.clip_index == index:
+                return c
+        return None
+
+
+def _draw_speed(rng: random.Random) -> float:
+    return round(rng.uniform(SPEED_MIN, SPEED_MAX), 5)
+
+
+def _draw_signed_delta(rng: random.Random) -> float:
+    return round(rng.uniform(-COLOR_DELTA, COLOR_DELTA), 4)
+
+
+def build_micro_transform_plan(
+    task_id: str,
+    video_index: int,
+    clip_count: int,
+    *,
+    clip_has_text: list[bool] | None = None,
+    enable_bgm_offset: bool = True,
+) -> VideoMicroTransformPlan:
+    """按可复现种子生成整片的微变换计划。
+
+    Args:
+        task_id: 生成任务 ID（种子输入）
+        video_index: 视频在批次中的序号（0 起）
+        clip_count: 片段数量
+        clip_has_text: 每个片段是否有字幕/文字轨道（True 的片段不翻转）；
+                       None 时按 P1 约定视为无可靠文字检测——保守起见 hflip 一律关闭
+        enable_bgm_offset: 是否生成 BGM 起始偏移（无 BGM 时调用方可忽略该值）
+
+    Returns:
+        VideoMicroTransformPlan
+    """
+    seed = make_video_seed(task_id, video_index)
+    rng = random.Random(seed)
+
+    # P1 字幕检测约定：无法判断片段是否有文字时，一律不翻转（宁可少一个维度也不误翻字幕）
+    safe_has_text = clip_has_text if clip_has_text is not None else [True] * max(clip_count, 0)
+
+    clips: list[ClipMicroTransform] = []
+    for i in range(max(clip_count, 0)):
+        has_text = bool(safe_has_text[i]) if i < len(safe_has_text) else True
+        do_hflip = (not has_text) and rng.random() < HFLIP_PROBABILITY
+        clips.append(
+            ClipMicroTransform(
+                clip_index=i,
+                hflip=do_hflip,
+                speed=_draw_speed(rng),
+                brightness=_draw_signed_delta(rng),
+                contrast=round(1.0 + _draw_signed_delta(rng), 4),
+                saturation=round(1.0 + _draw_signed_delta(rng), 4),
+                has_text=has_text,
+            )
+        )
+
+    bgm_offset = rng.uniform(BGM_OFFSET_MIN, BGM_OFFSET_MAX) if enable_bgm_offset else 0.0
+    return VideoMicroTransformPlan(
+        task_id=task_id,
+        video_index=video_index,
+        seed=seed,
+        clips=clips,
+        bgm_start_offset=round(bgm_offset, 3),
+    )
+
+
+def build_bgm_offset_trim(start_offset: float, bgm_duration: float) -> str:
+    """生成 BGM 起始偏移的 atrim 片段。
+
+    偏移超出 BGM 长度时回退为 0（从头播放），避免空输入。
+    返回的字符串形如 "atrim=start=3.200,"，可拼到 BGM filter chain 最前面；
+    无需偏移时返回空串。
+    """
+    if start_offset <= 0 or bgm_duration <= 0 or start_offset >= bgm_duration - 0.5:
+        return ""
+    return f"atrim=start={start_offset:.3f},"

apps/worker/video_processing/render_adapter.py

@@ -493,6 +493,41 @@ class RenderAdapter:
             logger.warning("ASR 服务初始化失败，自动字幕将不可用: %s", e)
             return None
 
+    def _resolve_clip_has_text(self, clips: list[Any]) -> list[bool] | None:
+        """#1970：按源视频片段顺序解析 atom_clip.ai_tags.has_text。
+
+        顺序与 UnifiedRenderService 的「非 audio 源片段」口径一致。
+        仅当 atom_clip 存在 ai_tags 字典且 has_text 显式为 False 时标记为
+        无文字（允许 hflip）；atom_clip_id 缺失、ai_tags 未生成、has_text 为
+        true/null/非布尔值时一律按有文字处理（保守不翻转）。
+        查询失败时返回 None，渲染层回退到全保守路径。
+        """
+        video_clips = [c for c in clips if getattr(c, "clip_type", "main") != "audio"]
+        atom_ids: list[str] = []
+        seen: set[str] = set()
+        for c in video_clips:
+            atom_id = getattr(c, "atom_clip_id", "") or ""
+            if atom_id and atom_id not in seen:
+                seen.add(atom_id)
+                atom_ids.append(atom_id)
+        if not atom_ids:
+            return None
+        try:
+            from packages.adapters.sqlalchemy_impl.asset_atom_clip_repository import (
+                SQLAlchemyAssetAtomClipRepository,
+            )
+
+            atom_clips = SQLAlchemyAssetAtomClipRepository(self._db).find_by_ids(atom_ids)
+        except Exception as exc:
+            logger.warning("[render-adapter] atom_clip ai_tags 查询失败，hflip 全量保守处理: %s", exc)
+            return None
+        has_text_map: dict[str, bool] = {}
+        for ac in atom_clips:
+            ai_tags = getattr(ac, "ai_tags", None)
+            no_text = isinstance(ai_tags, dict) and ai_tags.get("has_text") is False
+            has_text_map[ac.id] = not no_text
+        return [has_text_map.get((getattr(c, "atom_clip_id", "") or ""), True) for c in video_clips]
+
     def _do_render(
         self,
         plan: Any,
@@ -542,6 +577,7 @@ class RenderAdapter:
         )
 
         # 4. 执行统一渲染
+        clip_has_text = self._resolve_clip_has_text(clips)
         render_svc = UnifiedRenderService(
             plan=plan,
             clips=clips,
@@ -552,6 +588,7 @@ class RenderAdapter:
             bgm_path=bgm_path,
             asr_service=asr_service,
             voiceover_audio_path=voiceover_audio_path,
+            clip_has_text=clip_has_text,
         )
         result = render_svc.render()
 

apps/worker/video_processing/render_audio.py

@@ -98,6 +98,7 @@ def mix_audio(
     bgm_path: str | None = None,
     bgm_config: dict | None = None,
     audio_tracks_config: dict | None = None,
+    bgm_start_offset: float = 0.0,
 ) -> Path | None:
     """音频后处理混音.
 
@@ -157,7 +158,10 @@ def mix_audio(
         if bgm_path and bgm_config and isinstance(bgm_config, dict) and bgm_config.get("enabled", False):
             from video_processing.bgm_mixer import BGMConfig, build_bgm_only
 
-            bgm_cfg = BGMConfig.from_config_dict(bgm_path, bgm_config)
+            _bgm_cfg_dict = dict(bgm_config or {})
+            if bgm_start_offset and not _bgm_cfg_dict.get("audio_offset"):
+                _bgm_cfg_dict["audio_offset"] = round(float(bgm_start_offset), 3)
+            bgm_cfg = BGMConfig.from_config_dict(bgm_path, _bgm_cfg_dict)
             try:
                 return build_bgm_only(ctx, bgm_cfg, video_duration)
             except Exception:
@@ -187,7 +191,10 @@ def mix_audio(
     if bgm_path and bgm_config and isinstance(bgm_config, dict) and bgm_config.get("enabled", False):
         from video_processing.bgm_mixer import BGMConfig, mix_bgm_with_main
 
-        bgm_cfg = BGMConfig.from_config_dict(bgm_path, bgm_config)
+        _bgm_cfg_dict = dict(bgm_config or {})
+        if bgm_start_offset and not _bgm_cfg_dict.get("audio_offset"):
+            _bgm_cfg_dict["audio_offset"] = round(float(bgm_start_offset), 3)
+        bgm_cfg = BGMConfig.from_config_dict(bgm_path, _bgm_cfg_dict)
 
         try:
             # 这里 main_audio 就是 output_path，先有主音频再混 BGM

apps/worker/video_processing/unified_render_service.py

@@ -155,6 +155,7 @@ class UnifiedRenderService:
         asr_service: Any = None,  # ASRService 实例，用于自动生成字幕
         bgm_path: str | None = None,  # BGM 本地文件路径
         voiceover_audio_path: str | None = None,  # 配音素材库音频本地路径
+        clip_has_text: list[bool] | None = None,  # 源视频片段是否有文字（来自 atom_clip.ai_tags.has_text）
     ):
         self.plan = plan
         self.clips = clips
@@ -167,10 +168,98 @@ class UnifiedRenderService:
         self.asr_service = asr_service
         self.bgm_path = bgm_path
         self.voiceover_audio_path = voiceover_audio_path
+        # #1970：片段级文字检测（顺序与非 audio 的源视频片段一致）；None 表示无可靠检测，保守不翻转
+        self._clip_has_text = clip_has_text
         self._transition_engine = TransitionEngine(default_duration=transition_duration)
         self._speed_engine = SpeedEngine()
         self._asr_timeline_cache: Any = None  # ASR 字幕结果缓存，避免重复调用
         self._asr_timeline_cached = False
+        # #1970 PR2：片段级微变换计划缓存（懒构建，dedup_enabled=False 时为 None）
+        self._micro_plan_cache: Any = None
+        self._micro_plan_loaded = False
+
+    # ── #1970 PR2 智能降重：片段级微变换 ───────────────────────────────────
+    def _dedup_enabled(self) -> bool:
+        """读取 plan.config.dedup_enabled，缺省视为 True（向后兼容）。"""
+        cfg = self.plan.config or {}
+        return bool(cfg.get("dedup_enabled", True))
+
+    def _get_micro_transform_plan(self, clip_count: int) -> Any:
+        """按 task_id+视频序号构建可复现的片段级微变换计划。
+
+        种子 hash(generation_task_id + video_index)%10000，同一任务重渲结果一致。
+        dedup_enabled=False 时返回 None，调用方不注入任何微变换。
+        hflip 放开（#1970）：clip_has_text 来自 atom_clip.ai_tags.has_text，
+        仅 AI 明确判定无文字的片段可参与 50% 翻转；未打标签 / has_text 为
+        true/null 或缺位时一律视为有文字，保持保守不翻转。
+        """
+        if self._micro_plan_loaded:
+            return self._micro_plan_cache
+        self._micro_plan_loaded = True
+        if not self._dedup_enabled() or clip_count <= 0:
+            self._micro_plan_cache = None
+            return None
+        try:
+            from video_processing.micro_transform_pure import build_micro_transform_plan
+
+            cfg = self.plan.config or {}
+            task_id = str(cfg.get("generation_task_id", "") or "")
+            video_index = int(cfg.get("video_index", 0) or 0)
+            # self._clip_has_text 顺序与非 audio 源片段一致；
+            # None（未提供检测，如内存直渲/旧任务）→ 纯函数层按全有文字保守处理；
+            # 列表短于片段数时缺位片段同样按有文字处理
+            self._micro_plan_cache = build_micro_transform_plan(
+                task_id,
+                video_index,
+                clip_count,
+                clip_has_text=self._clip_has_text,
+                enable_bgm_offset=bool(cfg.get("bgm")),
+            )
+        except Exception as e:
+            logger.warning("[unified-render] 微变换计划构建失败，本次不注入: %s", e)
+            self._micro_plan_cache = None
+        return self._micro_plan_cache
+
+    @staticmethod
+    def _apply_micro_transform_video(filters: list[str], mt: Any) -> None:
+        """把片段视频微变换就地追加到 filter 链（post-scale 阶段调用）。
+
+        顺序：hflip 在 pre-scale 阶段由 _apply_micro_hflip 处理，这里只加
+        eq 亮度/对比度/饱和度。速度 setpts 与既有 clip speed 相乘（见调用点），
+        避免出现两条 setpts 互相覆盖。
+        """
+        if mt is None:
+            return
+        if abs(mt.brightness) > 1e-4 or abs(mt.contrast - 1.0) > 1e-4 or abs(mt.saturation - 1.0) > 1e-4:
+            filters.append(
+                f"eq=brightness={mt.brightness:+.4f}:" f"contrast={mt.contrast:.4f}:saturation={mt.saturation:.4f}"
+            )
+
+    @staticmethod
+    def _apply_micro_hflip(filters: list[str], mt: Any) -> None:
+        """片段级水平翻转（pre-scale 阶段）。P1 有文字/无法判定时 mt.hflip=False。"""
+        if mt is not None and mt.hflip and not mt.has_text:
+            filters.append("hflip")
+
+    @staticmethod
+    def _micro_speed_factor(mt: Any) -> float:
+        """片段微变换速度因子（0.97~1.03），无计划返回 1.0。"""
+        if mt is None:
+            return 1.0
+        return float(getattr(mt, "speed", 1.0) or 1.0)
+
+    def _get_micro_bgm_offset(self) -> float:
+        """#1970 PR2：读取本视频 BGM 起始偏移（秒），无 BGM/禁用时为 0。"""
+        if not self.plan.config:
+            return 0.0
+        try:
+            count = len([c for c in (self.plan.clips or []) if getattr(c, "clip_type", "main") != "audio"])
+            plan = self._get_micro_transform_plan(count)
+            if plan:
+                return round(float(plan.bgm_start_offset or 0.0), 3)
+        except Exception:
+            logger.debug("微变换 BGM 偏移读取失败，按 0 处理: plan_id=%s", getattr(self.plan, "id", "?"))
+        return 0.0
 
     def render(self) -> RenderResult:
         """执行渲染，返回 RenderResult.
@@ -316,6 +405,9 @@ class UnifiedRenderService:
                     ctx = RenderContext(work_dir=self.work_dir, plan_id=self.plan.id)
                     from video_processing.bgm_mixer import BGMConfig, mix_bgm_with_main
 
+                    _bgm_off = self._get_micro_bgm_offset()
+                    if _bgm_off and not (bgm_config or {}).get("audio_offset"):
+                        bgm_config = {**bgm_config, "audio_offset": _bgm_off}
                     bgm_cfg = BGMConfig.from_config_dict(self.bgm_path, bgm_config)
                     # 从直通输出中提取音频
                     main_audio_path = self.work_dir / f"pass_through_audio_{self.plan.id}.aac"
@@ -365,6 +457,7 @@ class UnifiedRenderService:
                 bgm_path=self.bgm_path,
                 bgm_config=bgm_config,
                 audio_tracks_config=audio_tracks_config,
+                bgm_start_offset=self._get_micro_bgm_offset(),
             )
             t_audio_end = time.time()
             audio_mix_ms = int((t_audio_end - t_audio_start) * 1000)
@@ -1112,6 +1205,28 @@ class UnifiedRenderService:
         if ass_path is not None:
             return False, "有字幕叠加"
 
+        # #1970 PR2：片段级微变换（变速/hflip/亮度/对比度/饱和度）需要重编码
+        try:
+            _video_sources = [c for c in (self.clips or []) if getattr(c, "clip_type", "main") != "audio"]
+            _ordinal = -1
+            for _i, _c in enumerate(_video_sources):
+                if getattr(_c, "id", None) == getattr(clip, "clip_id", None):
+                    _ordinal = _i
+                    break
+            _mt_plan = self._get_micro_transform_plan(len(_video_sources))
+            if _mt_plan and 0 <= _ordinal < len(_mt_plan.clips):
+                _mt = _mt_plan.clips[_ordinal]
+                if (
+                    abs(UnifiedRenderService._micro_speed_factor(_mt) - 1.0) >= 1e-6
+                    or (_mt.hflip and not _mt.has_text)
+                    or abs(_mt.brightness) > 1e-4
+                    or abs(_mt.contrast - 1.0) > 1e-4
+                    or abs(_mt.saturation - 1.0) > 1e-4
+                ):
+                    return False, "启用了片段级微变换"
+        except Exception:
+            logger.debug("stream copy 微变换门控检查异常，按可 copy 处理", exc_info=True)
+
         # 有调速 → 需要重编码 → 不能 copy
         speed = UnifiedRenderService._clip_speed(clip)
         if abs(speed - 1.0) >= 1e-6:
@@ -1318,11 +1433,16 @@ class UnifiedRenderService:
 
         # 视觉扰动（plan 级别，直通模式同样适用）
         vp = self._get_visual_perturbation()
+        # #1970 PR2：单片段直通；计划按源视频片段数构建，序号取 config._micro_index
+        _src_video_count = len([c for c in (self.clips or []) if getattr(c, "clip_type", "main") != "audio"])
+        mt_plan = self._get_micro_transform_plan(max(1, _src_video_count))
+        _mi = int(clip.config.get("_micro_index", 0)) if isinstance(clip.config, dict) else 0
+        mt = mt_plan.clips[_mi] if mt_plan and 0 <= _mi < len(mt_plan.clips) else None
 
-        # 调速 — 与 filter_complex 路径一致（叠加视觉扰动 speed_factor）
+        # 调速 — 与 filter_complex 路径一致（叠加视觉扰动 speed_factor 与 #1970 微变换速度）
         speed = UnifiedRenderService._clip_speed(clip)
         vp_speed = vp.get("speed_factor", 1.0) if vp else 1.0
-        effective_speed = speed * vp_speed
+        effective_speed = speed * vp_speed  # 微变换速度已烘焙进 playback_speed
         if abs(effective_speed - 1.0) >= 1e-6:
             filters.append(f"setpts=PTS/{effective_speed:.4f}")
 
@@ -1336,6 +1456,8 @@ class UnifiedRenderService:
         # 视觉扰动：hflip（在 scale 之前）
         if vp:
             self._apply_visual_perturbation_pre_scale(filters, vp)
+        # #1970 PR2：片段级 hflip（P1 保守：有文字/无法判定时不翻转）
+        UnifiedRenderService._apply_micro_hflip(filters, mt)
 
         # scale + pad（等比缩放+留黑边）
         if role in ("overlay", "corner_voice"):
@@ -1354,6 +1476,8 @@ class UnifiedRenderService:
         # 视觉扰动：zoom + brightness（在 scale+pad 之后、调色之前）
         if vp:
             self._apply_visual_perturbation_post_scale(filters, vp)
+        # #1970 PR2：片段级亮度/对比度/饱和度微调
+        UnifiedRenderService._apply_micro_transform_video(filters, mt)
 
         # 调色滤镜
         color_grade = ColorGradeConfig.from_dict(clip.config.get("color_grade"))
@@ -1450,7 +1574,8 @@ class UnifiedRenderService:
             # 音频调速（在降噪之后、音量之前，与 render_audio.py concat 路径保持一致）
             # SpeedEngine.build_audio_filter 内部已实现多级 atempo 串联，
             # 自动处理超出 [0.5, 2.0] 范围的速度（如 0.25x → atempo=0.5,atempo=0.5）。
-            speed = UnifiedRenderService._clip_speed(clip)
+            # #1970 PR2：叠加片段微变换速度因子，保持音画同步。
+            speed = UnifiedRenderService._clip_speed(clip)  # 微变换速度已烘焙进 playback_speed
             if abs(speed - 1.0) >= 1e-6:
                 try:
                     from video_processing.speed_engine import SpeedConfig, SpeedEngine
@@ -1522,11 +1647,20 @@ class UnifiedRenderService:
         支持多段裁剪：一个 clip 配置了 trim_segments 时会展开为多个 ResolvedClip。
         """
         resolved: list[ResolvedClip] = []
+        # #1970 PR2：预建片段级微变换计划，按源视频片段序号取速度因子，
+        # 烘焙进 playback_speed，保证视频 setpts 与音频 atempo 一致。
+        video_source_clips = [c for c in self.clips if getattr(c, "clip_type", "main") != "audio"]
+        mt_plan = self._get_micro_transform_plan(len(video_source_clips))
+        _video_ordinal = {id(c): i for i, c in enumerate(video_source_clips)}
+
         for clip in self.clips:
             asset_id = clip.asset_id
             if not asset_id:
                 logger.warning("片段无素材: clip_id=%s", clip.id)
                 continue
+            _mt_idx = _video_ordinal.get(id(clip), -1)
+            _mt = mt_plan.clips[_mt_idx] if mt_plan and 0 <= _mt_idx < len(mt_plan.clips) else None
+            _micro_speed = UnifiedRenderService._micro_speed_factor(_mt)
 
             local_path = self.asset_path_map.get(asset_id)
             if local_path is None or not local_path.exists():
@@ -1555,7 +1689,7 @@ class UnifiedRenderService:
                     seg_duration = seg.trim.duration
 
                     # 多段裁剪：如果段的时长超过素材实际时长，减速补偿
-                    seg_speed = configured_speed
+                    seg_speed = configured_speed * _micro_speed
                     if actual_duration > 0 and seg_duration > actual_duration + 0.05:
                         seg_speed = max(0.25, round(configured_speed * actual_duration / seg_duration, 4))
                         logger.info(
@@ -1578,7 +1712,7 @@ class UnifiedRenderService:
                         transition_effect=clip.transition_effect or "cut",
                         transition_duration=getattr(clip, "transition_duration", 0.0) or 0.0,
                         playback_speed=seg_speed,
-                        config={**clip_config, "_segment_id": seg.segment_id},
+                        config={**clip_config, "_segment_id": seg.segment_id, "_micro_index": _mt_idx},
                         actual_duration=actual_duration,
                         trim_config=seg.trim,
                     )
@@ -1633,12 +1767,13 @@ class UnifiedRenderService:
                     avail_in_asset,
                     freeze_seconds,
                 )
-            final_speed = configured_speed
+            final_speed = configured_speed * _micro_speed
 
             # freeze 标记写入 config，供视频 tpad / 音频 apad 读取
             resolved_config = dict(clip_config)
             if freeze_seconds > 0:
                 resolved_config["_freeze_seconds"] = freeze_seconds
+            resolved_config["_micro_index"] = _mt_idx
 
             rc = ResolvedClip(
                 clip_id=clip.id,
@@ -1754,9 +1889,15 @@ class UnifiedRenderService:
         preprocessed_labels: list[str] = []
         # 视觉扰动（plan 级别，所有 clip 共享同一套扰动参数）
         vp = self._get_visual_perturbation()
+        # #1970 PR2：片段级微变换（每片段独立参数，dedup_enabled=False 时为 None）
+        # 计划按源视频片段数构建，trim 多段展开时各段通过 config._micro_index 找参数
+        _src_video_count = len([c for c in (self.clips or []) if getattr(c, "clip_type", "main") != "audio"])
+        mt_plan = self._get_micro_transform_plan(_src_video_count)
         for i, clip in enumerate(all_clips):
             label = f"v{i}"
             role = _resolve_layer_role(clip.clip_type, clip.config)
+            _mi = int(clip.config.get("_micro_index", i)) if isinstance(clip.config, dict) else i
+            mt = mt_plan.clips[_mi] if mt_plan and 0 <= _mi < len(mt_plan.clips) else None
 
             filters: list[str] = []
 
@@ -1774,10 +1915,10 @@ class UnifiedRenderService:
                     filters.append(f"trim=duration={trim_dur:.3f}")
                 filters.append("setpts=PTS-STARTPTS")
 
-            # 调速 — 基于 setpts 改变播放速度（叠加视觉扰动 speed_factor）
+            # 调速 — 基于 setpts 改变播放速度（叠加视觉扰动 speed_factor 与 #1970 微变换速度）
             speed = UnifiedRenderService._clip_speed(clip)
             vp_speed = vp.get("speed_factor", 1.0) if vp else 1.0
-            effective_speed = speed * vp_speed
+            effective_speed = speed * vp_speed  # 微变换速度已烘焙进 playback_speed
             if abs(effective_speed - 1.0) >= 1e-6:
                 filters.append(f"setpts=PTS/{effective_speed:.4f}")
 
@@ -1791,6 +1932,8 @@ class UnifiedRenderService:
             # 视觉扰动：hflip（在 scale 之前，翻转原始画面）
             if vp:
                 self._apply_visual_perturbation_pre_scale(filters, vp)
+            # #1970 PR2：片段级 hflip（P1 保守：有文字/无法判定时不翻转）
+            UnifiedRenderService._apply_micro_hflip(filters, mt)
 
             # scale
             if role in ("overlay", "corner_voice"):
@@ -1809,6 +1952,8 @@ class UnifiedRenderService:
             # 视觉扰动：zoom + brightness（在 scale+pad 之后、调色之前）
             if vp:
                 self._apply_visual_perturbation_post_scale(filters, vp)
+            # #1970 PR2：片段级亮度/对比度/饱和度微调
+            UnifiedRenderService._apply_micro_transform_video(filters, mt)
 
             # 调色滤镜（每个 clip 独立的 color grade 配置）
             color_grade = ColorGradeConfig.from_dict(clip.config.get("color_grade"))

apps/worker/worker_app/celery_app.py

@@ -27,6 +27,11 @@ celery_app.conf.broker_transport_options = {"visibility_timeout": 4 * 60 * 60}
 celery_app.conf.imports = (
     "worker_app.tasks.health",
     "worker_app.tasks.ingest",
+    "worker_app.tasks.atom_clips",
+    # #1970 片段级 AI 标签：必须显式 import 注册，否则 worker 报
+    # "Received unregistered task of type 'worker.tag_atom_clip'"
+    "worker_app.tasks.atom_clip_tagging",
+    "worker_app.tasks.backfill_atom_clip_tags",
     "worker_app.tasks.classification",
     "worker_app.tasks.generation",
     "worker_app.tasks.voice_extraction",

apps/worker/worker_app/tasks/__init__.py

@@ -53,12 +53,25 @@ def __getattr__(name: str):
         from .batch_thumbnail import batch_generate_thumbnails
 
         return batch_generate_thumbnails
+    elif name == "generate_atom_clips":
+        from .atom_clips import generate_atom_clips
+
+        return generate_atom_clips
+    elif name == "tag_atom_clip_task":
+        from .atom_clip_tagging import tag_atom_clip_task
+
+        return tag_atom_clip_task
+    elif name == "backfill_atom_clip_tags":
+        from .backfill_atom_clip_tags import backfill_atom_clip_tags
+
+        return backfill_atom_clip_tags
     raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
 
 
 __all__ = [
     "batch_generate_thumbnails",
     "classify_asset",
+    "generate_atom_clips",
     "generate_video",
     "healthcheck",
     "ingest_asset",

apps/worker/worker_app/tasks/atom_clip_tagging.py

@@ -0,0 +1,98 @@
+"""片段级 AI 标签 Celery 任务 — #1970 智能剪辑流程重构 P2.
+
+为单个 atom_clip 调用视觉 AI 生成结构化标签，并更新到 ai_tags 字段。
+失败不阻断流程（降级为仅继承素材标签）。
+
+任务名：worker.tag_atom_clip
+"""
+
+from __future__ import annotations
+
+from celery.utils.log import get_task_logger
+from worker_app.celery_app import celery_app
+from worker_app.db import SessionLocal
+
+from packages.adapters.sqlalchemy_impl.asset_atom_clip_repository import (
+    SQLAlchemyAssetAtomClipRepository,
+)
+from packages.adapters.sqlalchemy_impl.asset_repository import SQLAlchemyAssetRepository
+from packages.domain.atom_clip_tagger import tag_atom_clip
+from packages.shared.ai_client import get_doubao_client
+from packages.shared.mediakit_client import get_mediakit_client
+from packages.shared.storage import get_shared_storage_service
+
+logger = get_task_logger(__name__)
+
+
+@celery_app.task(name="worker.tag_atom_clip", bind=True, max_retries=2, default_retry_delay=10)
+def tag_atom_clip_task(self, atom_clip_id: str, force: bool = False) -> dict:
+    """为单个原子片段生成 AI 标签.
+
+    Args:
+        atom_clip_id: 原子片段 ID。
+        force: True 时允许覆盖只有 inherited_tags 的降级记录
+            （视觉 API 曾失败写入的占位标签，#1970）。
+            已有完整标签（含 has_text）始终跳过，保证幂等。
+
+    Returns:
+        任务结果 dict：status / clip_id / ai_tags（部分字段）。
+    """
+    db = SessionLocal()
+    try:
+        atom_repo = SQLAlchemyAssetAtomClipRepository(db)
+        asset_repo = SQLAlchemyAssetRepository(db)
+
+        clip = atom_repo.find_by_id(atom_clip_id)
+        if clip is None:
+            return {"status": "skipped", "reason": "clip not found", "clip_id": atom_clip_id}
+
+        # 已有完整标签则跳过（幂等）；force 仅放行缺失 has_text 的降级记录
+        if clip.ai_tags is not None:
+            has_real_tags = isinstance(clip.ai_tags, dict) and "has_text" in clip.ai_tags
+            if has_real_tags or not force:
+                return {"status": "skipped", "reason": "already tagged", "clip_id": atom_clip_id}
+
+        # 获取素材信息
+        asset = asset_repo.find_by_id(clip.asset_id)
+        if asset is None:
+            return {"status": "skipped", "reason": "asset not found", "clip_id": atom_clip_id}
+
+        # 获取视频可访问 URL
+        storage = get_shared_storage_service()
+        video_url = storage.get_download_url(asset.storage_key, expires_seconds=3600)
+
+        # 初始化客户端
+        doubao_client = get_doubao_client()
+        mediakit_client = get_mediakit_client()
+
+        # 调用 tagger
+        ai_tags = tag_atom_clip(
+            clip=clip,
+            video_url=video_url,
+            doubao_client=doubao_client,
+            mediakit_client=mediakit_client,
+            storage=storage,
+        )
+
+        # 更新数据库
+        atom_repo.update_ai_tags(atom_clip_id, ai_tags)
+
+        logger.info(
+            "[atom_clip_tagging] clip_id=%s ai_tags=%s",
+            atom_clip_id,
+            {k: v for k, v in ai_tags.items() if k != "inherited_tags"},
+        )
+        return {
+            "status": "completed",
+            "clip_id": atom_clip_id,
+            "has_ai_tags": any(v for k, v in ai_tags.items() if k != "inherited_tags" and v),
+        }
+    except Exception as exc:
+        db.rollback()
+        logger.exception("[atom_clip_tagging] clip_id=%s 失败: %s", atom_clip_id, exc)
+        # 可重试异常
+        if self.request.retries < self.max_retries:
+            raise self.retry(exc=exc) from None
+        return {"status": "failed", "clip_id": atom_clip_id, "error": str(exc)}
+    finally:
+        db.close()

apps/worker/worker_app/tasks/atom_clips.py

@@ -0,0 +1,109 @@
+"""素材原子切片 Celery 任务 — #1970 智能剪辑流程重构 P1.
+
+素材入库预处理完成（ingest 置 READY）后异步触发：
+根据素材时长和已缓存的 scdet 切换点计算原子片段并落库。
+失败不阻断素材入库主流程（atom_clips 未就绪时选片有内存兜底）。
+
+P2 增强：切片完成后自动链式触发 AI 标签任务（每个 clip 一个 tag_atom_clip 任务）。
+"""
+
+from __future__ import annotations
+
+from celery.utils.log import get_task_logger
+from worker_app.celery_app import celery_app
+from worker_app.db import SessionLocal
+
+from packages.adapters.sqlalchemy_impl.asset_atom_clip_repository import (
+    SQLAlchemyAssetAtomClipRepository,
+)
+from packages.adapters.sqlalchemy_impl.asset_repository import SQLAlchemyAssetRepository
+from packages.domain.atom_clip_service import compute_atom_clips
+from packages.domain.plan_generator_utils import extract_scene_points_from_metadata
+
+logger = get_task_logger(__name__)
+
+
+@celery_app.task(name="worker.generate_atom_clips")
+def generate_atom_clips(asset_id: str) -> dict:
+    """为单条视频素材生成原子片段。
+
+    Returns:
+        任务结果 dict：status / asset_id / clips_count。
+    """
+    db = SessionLocal()
+    try:
+        asset_repo = SQLAlchemyAssetRepository(db)
+        atom_repo = SQLAlchemyAssetAtomClipRepository(db)
+
+        asset = asset_repo.find_by_id(asset_id)
+        if asset is None:
+            return {"status": "skipped", "reason": "asset not found", "asset_id": asset_id}
+
+        # 仅视频素材切片
+        if asset.mime_type and not asset.mime_type.startswith("video/"):
+            return {"status": "skipped", "reason": "not a video", "asset_id": asset_id}
+        if not asset.duration or asset.duration <= 0:
+            return {"status": "skipped", "reason": "invalid duration", "asset_id": asset_id}
+
+        # 已生成过则幂等跳过（重新切片需先显式删除）
+        existing = atom_repo.count_by_asset(asset_id)
+        if existing > 0:
+            return {
+                "status": "skipped",
+                "reason": "already generated",
+                "asset_id": asset_id,
+                "clips_count": existing,
+            }
+
+        scene_points = extract_scene_points_from_metadata(asset.metadata)
+        # P1 阶段继承素材的标签 ID；片段级语义标签是 P2 功能
+        tags = list(getattr(asset, "tag_ids", []) or [])
+
+        clips = compute_atom_clips(
+            asset_id=asset_id,
+            duration=float(asset.duration),
+            scene_change_points=scene_points,
+            tags=tags,
+        )
+        if not clips:
+            return {"status": "skipped", "reason": "no clips computed", "asset_id": asset_id}
+
+        atom_repo.batch_create(clips)
+        logger.info(
+            "[atom_clips] asset_id=%s 生成 %d 个原子片段",
+            asset_id,
+            len(clips),
+        )
+
+        # P2 增强：链式触发 AI 标签任务（每个 clip 一个异步任务）
+        _dispatch_tagging_tasks(clips)
+
+        return {"status": "completed", "asset_id": asset_id, "clips_count": len(clips)}
+    except Exception as exc:  # noqa: BLE001 - 后台任务兜底，失败不阻断主流程
+        db.rollback()
+        logger.exception("[atom_clips] asset_id=%s 生成失败: %s", asset_id, exc)
+        return {"status": "failed", "asset_id": asset_id, "error": str(exc)}
+    finally:
+        db.close()
+
+
+def _dispatch_tagging_tasks(clips: list) -> None:
+    """为每个新建片段发送 AI 标签异步任务.
+
+    失败不阻断（标签任务是锦上添花，不影响核心流程）。
+    """
+    try:
+        for clip in clips:
+            celery_app.send_task(
+                "worker.tag_atom_clip",
+                args=[clip.id],
+            )
+        logger.info(
+            "[atom_clips] 已发送 %d 个 AI 标签任务",
+            len(clips),
+        )
+    except Exception as e:
+        logger.warning(
+            "[atom_clips] 发送 AI 标签任务失败（不影响切片结果）: %s",
+            e,
+        )

apps/worker/worker_app/tasks/backfill_atom_clip_tags.py

@@ -0,0 +1,106 @@
+"""批量回填 AI 标签 Celery 任务 — #1970 智能剪辑流程重构 P2.
+
+查找所有 ai_tags IS NULL 的 atom_clips，分批触发 tag_atom_clip 任务。
+可通过 API 路由触发（管理员权限）。
+
+任务名：worker.backfill_atom_clip_tags
+"""
+
+from __future__ import annotations
+
+import time
+
+from celery.utils.log import get_task_logger
+from worker_app.celery_app import celery_app
+from worker_app.db import SessionLocal
+
+from packages.adapters.sqlalchemy_impl.asset_atom_clip_repository import (
+    SQLAlchemyAssetAtomClipRepository,
+)
+
+logger = get_task_logger(__name__)
+
+# 默认批量参数
+DEFAULT_BATCH_SIZE = 10
+DEFAULT_BATCH_INTERVAL = 5  # 秒
+
+
+@celery_app.task(name="worker.backfill_atom_clip_tags")
+def backfill_atom_clip_tags(
+    batch_size: int = DEFAULT_BATCH_SIZE,
+    batch_interval: int = DEFAULT_BATCH_INTERVAL,
+    max_clips: int = 0,
+    force: bool = False,
+) -> dict:
+    """批量回填未打标的 atom_clips.
+
+    Args:
+        batch_size: 每批处理数量，默认 10。
+        batch_interval: 每批间隔秒数，默认 5。
+        max_clips: 最大处理总数，0 表示不限。
+        force: True 时连同只有 inherited_tags 的降级记录一起强制重打
+            （视觉 API 曾失败、DOUBAO_VISION_MODEL 修复后重跑用，#1970）。
+
+    Returns:
+        任务结果 dict：total_submitted / batches。
+    """
+    db = SessionLocal()
+    try:
+        atom_repo = SQLAlchemyAssetAtomClipRepository(db)
+        total_submitted = 0
+        batches = 0
+
+        while True:
+            # 查找未打标的片段
+            remaining = max_clips - total_submitted if max_clips > 0 else batch_size
+            fetch_limit = min(batch_size, remaining) if max_clips > 0 else batch_size
+
+            untagged = atom_repo.find_untagged(limit=fetch_limit, include_downgraded=force)
+            if not untagged:
+                break
+
+            # 逐个发送 tag 任务
+            for clip in untagged:
+                try:
+                    celery_app.send_task(
+                        "worker.tag_atom_clip",
+                        args=[clip.id],
+                        kwargs={"force": force},
+                    )
+                    total_submitted += 1
+                except Exception as e:
+                    logger.warning(
+                        "[backfill] 提交任务失败 clip_id=%s: %s",
+                        clip.id,
+                        e,
+                    )
+
+            batches += 1
+            logger.info(
+                "[backfill] 第 %d 批完成，已提交 %d 个任务",
+                batches,
+                total_submitted,
+            )
+
+            # 检查是否达到上限
+            if max_clips > 0 and total_submitted >= max_clips:
+                break
+
+            # 批间间隔
+            time.sleep(batch_interval)
+
+        logger.info(
+            "[backfill] 回填完成: total_submitted=%d batches=%d",
+            total_submitted,
+            batches,
+        )
+        return {
+            "status": "completed",
+            "total_submitted": total_submitted,
+            "batches": batches,
+        }
+    except Exception as exc:
+        logger.exception("[backfill] 回填失败: %s", exc)
+        return {"status": "failed", "error": str(exc)}
+    finally:
+        db.close()

apps/worker/worker_app/tasks/generation.py

@@ -890,25 +890,51 @@ def generate_video(self, task_id: str) -> dict:
                         _flush_logs(task_id, gen_task)
                     _update_task_progress(task_id, 80, "渲染完成")
 
-                    # ── 3.5 随机边缘裁剪降重（#1664） ──────────────────────────
-                    from video_processing.ffmpeg_utils import random_edge_crop
-
+                    # ── 3.5 随机边缘裁剪降重（#1664；#1970 dedup_enabled=False 时跳过） ──
+                    _dedup_enabled = True
                     try:
-                        cropped_path = random_edge_crop(output_path)
-                        if cropped_path != output_path:
-                            output_path = cropped_path
-                        if gen_task and render_attempt == 0:
-                            gen_task.append_log("边缘裁剪", "已应用随机 2-5% 边缘裁剪降重")
-                            _flush_logs(task_id, gen_task)
-                        logger.info("[task_id=%s] 随机边缘裁剪完成: %s", task_id, output_path)
-                    except Exception as crop_err:
+                        from packages.adapters.sqlalchemy_impl.models import EditPlanModel
+
+                        with SessionLocal() as _dedup_db:
+                            _plan_row = (
+                                _dedup_db.query(EditPlanModel.config)
+                                .filter(EditPlanModel.id == current_plan_id)
+                                .first()
+                            )
+                        if _plan_row is not None:
+                            _cfg = _plan_row[0] if isinstance(_plan_row[0], dict) else {}
+                            _dedup_enabled = bool(_cfg.get("dedup_enabled", True))
+                    except Exception:
                         logger.warning(
-                            "[task_id=%s] 随机边缘裁剪失败，使用原始视频继续: %s",
+                            "[task_id=%s] 读取 plan dedup_enabled 失败，按开启处理",
                             task_id,
-                            crop_err,
                             exc_info=True,
                         )
 
+                    if not _dedup_enabled:
+                        logger.info("[task_id=%s] dedup_enabled=False，跳过边缘裁剪与微变换", task_id)
+                        if gen_task and render_attempt == 0:
+                            gen_task.append_log("降重", "已关闭边缘裁剪与微变换（确定性渲染）")
+                            _flush_logs(task_id, gen_task)
+                    else:
+                        from video_processing.ffmpeg_utils import random_edge_crop
+
+                        try:
+                            cropped_path = random_edge_crop(output_path)
+                            if cropped_path != output_path:
+                                output_path = cropped_path
+                            if gen_task and render_attempt == 0:
+                                gen_task.append_log("边缘裁剪", "已应用随机 2-5% 边缘裁剪降重")
+                                _flush_logs(task_id, gen_task)
+                            logger.info("[task_id=%s] 随机边缘裁剪完成: %s", task_id, output_path)
+                        except Exception as crop_err:
+                            logger.warning(
+                                "[task_id=%s] 随机边缘裁剪失败，使用原始视频继续: %s",
+                                task_id,
+                                crop_err,
+                                exc_info=True,
+                            )
+
                     # ── 4. 上传 OSS（不落库） ───────────────────────────────
                     _update_task_progress(task_id, 85, "开始上传")
                     file_url, _storage_key = _upload_rendered_video(

apps/worker/worker_app/tasks/ingest.py

@@ -808,6 +808,21 @@ def ingest_asset(job_id: str) -> dict:
 
         db.commit()
 
+        # ── #1970 素材原子切片：视频 READY 后异步触发，失败不阻断入库 ──
+        # atom_clips 未就绪时选片逻辑有内存兜底（compute_fallback_clips）。
+        try:
+            if media_type == "video" and float(asset.duration or 0) > 0:
+                celery_app.send_task(
+                    "worker.generate_atom_clips",
+                    args=[asset.id],
+                )
+        except Exception as atom_err:  # noqa: BLE001
+            logger.warning(
+                "触发原子切片任务失败（不影响入库）: asset_id=%s err=%s",
+                asset.id,
+                atom_err,
+            )
+
         return {
             "status": "completed",
             "job_id": job.id,

deploy/configs/.env.production

@@ -234,6 +234,9 @@ DOUBAO_TIMEOUT=60
 # 最大重试次数
 DOUBAO_MAX_RETRIES=2
 
+# 视觉模型 Endpoint ID（支持图片/视频理解的模型）
+DOUBAO_VISION_MODEL=${DOUBAO_VISION_MODEL}
+
 
 # ==================== 微信开放平台 OAuth（网页扫码登录）====================
 # 回调域名：xiaoxiajianji.com（微信开放平台已配置）
@@ -252,3 +255,11 @@ DOUYIN_DEBUG_ERRORS=false
 TIKHUB_API_KEY=${TIKHUB_API_KEY}
 # P2: apizero.cn（国内付费，https://apizero.cn）
 APIZERO_API_KEY=${APIZERO_API_KEY}
+
+# ==================== GPU MuseTalk Worker（反向轮询） ====================
+GPU_WORKER_TOKEN=${GPU_WORKER_TOKEN}
+GPU_TASK_TIMEOUT_SECONDS=900
+USE_GPU_LIPSYNC=false
+GPU_LIPSYNC_POLL_INTERVAL=5
+GPU_LIPSYNC_WAIT_TIMEOUT=1200
+GPU_WORKER_STALE_SECONDS=300

deploy/configs/.env.staging

@@ -251,6 +251,9 @@ DOUBAO_TIMEOUT=60
 # 最大重试次数
 DOUBAO_MAX_RETRIES=2
 
+# 视觉模型 Endpoint ID（支持图片/视频理解的模型）
+DOUBAO_VISION_MODEL=${DOUBAO_VISION_MODEL}
+
 
 # ==================== 微信开放平台 OAuth（网页扫码登录）====================
 # 回调域名：xiaoxiajianji.com（微信开放平台已配置）
@@ -269,3 +272,11 @@ DOUYIN_DEBUG_ERRORS=false
 TIKHUB_API_KEY=${TIKHUB_API_KEY}
 # P2: apizero.cn（国内付费，https://apizero.cn）
 APIZERO_API_KEY=${APIZERO_API_KEY}
+
+# ==================== GPU MuseTalk Worker（反向轮询） ====================
+GPU_WORKER_TOKEN=${GPU_WORKER_TOKEN}
+GPU_TASK_TIMEOUT_SECONDS=900
+USE_GPU_LIPSYNC=true
+GPU_LIPSYNC_POLL_INTERVAL=5
+GPU_LIPSYNC_WAIT_TIMEOUT=1200
+GPU_WORKER_STALE_SECONDS=300

deploy/gpu_worker/.env.example

@@ -0,0 +1,30 @@
+# ============================================================
+# MuseTalk GPU Worker 环境变量
+# 部署到 RTX2060 电脑后，复制为 .env 并修改值
+# ============================================================
+
+# SaaS API 基础 URL（staging / production）
+API_BASE_URL=https://staging-api.xiaoxiajianji.com
+# API_BASE_URL=https://api.xiaoxiajianji.com   # 生产
+
+# 长期 API Token，必须与服务端 GPU_WORKER_TOKEN 一致（找后端拿）
+GPU_WORKER_TOKEN=replace-with-real-token
+
+# 本机 Worker 唯一 ID（默认自动生成 hostname+MAC 后4位，可手动指定）
+# WORKER_ID=rtx2060-0193
+
+# 本地 MuseTalk 地址（默认 http://127.0.0.1:7861）
+MUSE_TALK_URL=http://127.0.0.1:7861
+
+# 轮询/心跳/超时（秒）
+POLL_INTERVAL=5
+HEARTBEAT_INTERVAL=15
+# 下载/推理/上传 HTTP 超时，需与服务端 GPU_TASK_TIMEOUT_SECONDS 对齐（默认 900）
+REQUEST_TIMEOUT=900
+
+# 单个任务本地最大重试次数（仅网络/MuseTalk 瞬时错误才重试，默认 1）
+TASK_MAX_RETRY=1
+# 推理期间任务心跳间隔（秒，独立线程，无需改动）
+TASK_HEARTBEAT_INTERVAL=30
+# 输入视频最短时长（秒），小于则直接上报失败，不调用 MuseTalk
+MIN_VIDEO_DURATION_SECONDS=3

deploy/gpu_worker/README.md

@@ -0,0 +1,100 @@
+# MuseTalk GPU Worker — 部署指南
+
+本目录包含 RTX2060 本地电脑上运行的 GPU Worker 脚本。
+Worker 采用 **反向轮询模式**：主动向 SaaS API 拉取待处理的口型同步任务 → 调用本地 MuseTalk 推理 → 把结果视频回传到 SaaS。不需要内网穿透。
+
+## 目录文件
+
+| 文件 | 作用 |
+|---|---|
+| `gpu_worker.py` | Worker 主程序（单文件，零项目代码依赖，仅依赖 `requests`） |
+| `requirements.txt` | Python 依赖（只有 `requests`） |
+| `xiaoxia-gpu-worker.service` | systemd 服务单元（开机自启、异常自动重启） |
+| `.env.example` | 环境变量样例，复制为 `.env` 后填入真实值 |
+
+## 一、环境准备
+
+1. **Python 3.10+**（Windows 建议从 python.org 安装；Linux 自带）
+2. **本地 MuseTalk 服务** 已启动在 `http://127.0.0.1:7861`，health 接口返回 `{"status":"ok","free_vram_mb":...}`
+3. **ffmpeg**（可选，用于读取输出视频时长；未装则 duration 报 0，不影响功能）
+4. 网络能访问 staging / 生产 API（`curl https://staging-api.xiaoxiajianji.com/health` 应返回 `{"status":"healthy"}`）
+
+## 二、部署步骤（Linux，推荐 systemd）
+
+```bash
+# 1. 创建部署目录
+sudo mkdir -p /opt/xiaoxia-gpu-worker
+sudo chown $USER:$USER /opt/xiaoxia-gpu-worker
+cd /opt/xiaoxia-gpu-worker
+
+# 2. 拷贝脚本和依赖
+cp /path/to/deploy/gpu_worker/{gpu_worker.py,requirements.txt,xiaoxia-gpu-worker.service,.env.example} .
+cp .env.example .env
+#    编辑 .env，填入 API_BASE_URL 和 GPU_WORKER_TOKEN
+
+# 3. 创建虚拟环境并安装依赖
+python3 -m venv venv
+./venv/bin/pip install -r requirements.txt
+
+# 4. 前台先跑一次，确认日志正常
+./venv/bin/python gpu_worker.py
+#    看到 "MuseTalk 健康检查通过" 和 "注册/心跳" 成功即可 Ctrl+C 退出
+
+# 5. 安装 systemd 服务
+sudo cp xiaoxia-gpu-worker.service /etc/systemd/system/
+sudo systemctl daemon-reload
+sudo systemctl enable --now xiaoxia-gpu-worker
+
+# 6. 查看日志
+sudo journalctl -u xiaoxia-gpu-worker -f
+```
+
+## 三、部署步骤（Windows，快速测试）
+
+```bat
+:: 创建虚拟环境
+python -m venv venv
+venv\Scripts\pip install -r requirements.txt
+
+:: 复制并编辑 .env
+copy .env.example .env
+notepad .env
+
+:: 运行
+venv\Scripts\python gpu_worker.py
+```
+
+可在任务计划程序中添加开机启动项：程序选 `venv\Scripts\python.exe`，参数填 `gpu_worker.py`，起始目录填脚本所在目录。
+
+## 四、SaaS 侧配套配置
+
+SaaS 后端部署完成后需配置：
+
+1. 服务端环境变量 `GPU_WORKER_TOKEN` 设为一个随机强 Token（和 Worker `.env` 中一致）
+2. 数据库已跑迁移 `081_add_gpu_lipsync_tasks`（自动随 API 启动的 alembic upgrade head 完成）
+3. OSS bucket 中 `gpu-lipsync/results/` 路径可写（默认 bucket 已配）
+
+## 五、验证联调
+
+1. Worker 启动后日志看到 `注册/心跳` 成功
+2. 后端调用 `GpuLipsyncService.create_task(video_url=..., audio_url=...)` 放入一条测试任务
+3. Worker 在 5 秒内拉到任务，下载 → 推理 → 上传 → 上报
+4. 后端 `GET /api/v1/gpu/lipsync/status/{task_id}` 返回 `status=done`，`result_url` 非空
+
+## 六、故障排查
+
+| 现象 | 可能原因 / 排查 |
+|---|---|
+| 日志 401 `Invalid GPU worker token` | `.env` 的 `GPU_WORKER_TOKEN` 与服务端不一致 |
+| 日志 `MuseTalk 健康检查未通过` | 本地 MuseTalk 没启动，或端口不是 7861；`curl http://127.0.0.1:7861/health` 验证 |
+| 任务长时间不被拉取 | Worker 和服务端连不上；检查 API_BASE_URL 是否可达、Token 是否正确 |
+| 推理后上传 OSS 失败 | 本地出口网络被防火墙拦截 OSS 域名（oss-cn-hangzhou.aliyuncs.com） |
+| 服务端看到任务回退到 pending 重试 | 任务心跳真正超时（默认 900s）：Worker 进程崩溃/断网，或推理彻底卡死；正常长推理期间心跳线程每 30s 续期，不会回退 |
+| 日志 `MuseTalk 推理超时或连接失败` | 视频太长或显存不足；可临时调大 REQUEST_TIMEOUT（服务端 GPU_TASK_TIMEOUT_SECONDS 需同步调大），或限制输入视频时长 |
+| 日志 `视频过短（x.xxs < 3s）` | 输入视频不足 3s，MuseTalk 对短视频会 division by zero，已在本地直接上报失败；可用 MIN_VIDEO_DURATION_SECONDS 调整阈值 |
+
+## 七、安全注意事项
+
+- `.env` 包含长期 Token，文件权限设为 600（`chmod 600 .env`）
+- Token 泄露要立即在服务端更换 `GPU_WORKER_TOKEN` 并重启 Worker
+- Worker 只需要出站访问 SaaS API 和 OSS，不需要开放任何入站端口

deploy/gpu_worker/gpu_worker.py

@@ -0,0 +1,471 @@
+"""MuseTalk GPU Worker — 反向轮询模式.
+
+部署在有 RTX2060 的本地电脑上（192.168.0.193），
+主动轮询 SaaS API 拉取口型任务、调用本地 MuseTalk 推理、上传结果回 SaaS。
+
+环境变量：
+  API_BASE_URL        SaaS API 基础 URL（不含 /api/v1），如 https://staging-api.xiaoxiajianji.com
+  GPU_WORKER_TOKEN    长期 API Token（服务端 GPU_WORKER_TOKEN 需一致）
+  WORKER_ID           本机唯一 ID（默认 hostname+网卡MAC 后4位）
+  MUSE_TALK_URL       本地 MuseTalk 地址，默认 http://127.0.0.1:7861
+  POLL_INTERVAL       轮询间隔秒，默认 5
+  HEARTBEAT_INTERVAL  空闲心跳间隔秒，默认 15
+  REQUEST_TIMEOUT     HTTP 请求超时秒（下载/推理/上传统一使用），默认 900
+                      需与服务端 GPU_TASK_TIMEOUT_SECONDS（默认 900）对齐
+  TASK_MAX_RETRY      单任务本地最大重试次数（仅对瞬时错误重试），默认 1
+  TASK_HEARTBEAT_INTERVAL  推理期间任务心跳间隔秒，默认 30
+  MIN_VIDEO_DURATION_SECONDS  最短输入视频时长秒，小于则直接上报失败，默认 3
+
+用法：
+  python gpu_worker.py
+"""
+
+from __future__ import annotations
+
+import logging
+import os
+import platform
+import socket
+import sys
+import tempfile
+import threading
+import time
+import uuid
+from pathlib import Path
+from typing import Optional
+
+import requests
+
+logging.basicConfig(
+    level=logging.INFO,
+    format="%(asctime)s [%(levelname)s] %(message)s",
+    datefmt="%Y-%m-%d %H:%M:%S",
+)
+logger = logging.getLogger("musetalk-worker")
+
+# ── 配置 ────────────────────────────────────────────────────────────
+
+
+def _env(name: str, default: str = "") -> str:
+    v = os.environ.get(name, default)
+    return v.strip() if isinstance(v, str) else default
+
+
+class Config:
+    api_base_url: str = _env("API_BASE_URL", "https://staging-api.xiaoxiajianji.com").rstrip("/")
+    gpu_worker_token: str = _env("GPU_WORKER_TOKEN")
+    muse_talk_url: str = _env("MUSE_TALK_URL", "http://127.0.0.1:7861").rstrip("/")
+    poll_interval: float = float(_env("POLL_INTERVAL", "5"))
+    heartbeat_interval: float = float(_env("HEARTBEAT_INTERVAL", "15"))
+    # #1970：RTX2060 6G 处理 720p 长视频可能 >5min；与服务端
+    # GPU_TASK_TIMEOUT_SECONDS 默认值对齐为 900，避免推理被本地/服务端先掐断。
+    request_timeout: float = float(_env("REQUEST_TIMEOUT", "900"))
+    # 本地只在网络/MuseTalk 瞬时错误时重试 1 次；服务端 MAX_ATTEMPTS=3
+    # 负责跨 worker/真正超时后的重派发，总尝试次数不再相乘放大。
+    task_max_retry: int = int(_env("TASK_MAX_RETRY", "1"))
+    # 推理期间任务心跳间隔（独立线程 POST /gpu/register 带 task_id）
+    task_heartbeat_interval: float = float(_env("TASK_HEARTBEAT_INTERVAL", "30"))
+    # 输入视频最短时长（秒）：过短（如 1s）MuseTalk 会 division by zero，
+    # 本地前置拦截，直接上报 failed，不浪费 GPU 时间
+    min_video_duration_seconds: float = float(_env("MIN_VIDEO_DURATION_SECONDS", "3"))
+    worker_id: str = _env("WORKER_ID", "")
+
+    @classmethod
+    def derived_worker_id(cls) -> str:
+        if cls.worker_id:
+            return cls.worker_id
+        # hostname + MAC 后4位 → 稳定唯一 ID
+        try:
+            mac = uuid.getnode()
+            mac_suffix = f"{mac:012x}"[-4:]
+        except Exception:
+            mac_suffix = "0000"
+        host = platform.node() or socket.gethostname() or "rtx2060"
+        return f"{host}-{mac_suffix}"
+
+
+# ── 辅助 ─────────────────────────────────────────────────────────────
+
+
+def _api_headers() -> dict[str, str]:
+    token = Config.gpu_worker_token
+    if not token:
+        logger.warning("GPU_WORKER_TOKEN 未配置，开发模式下会被服务端拒绝（生产环境必须配置）")
+    return {"Authorization": f"Bearer {token}"} if token else {}
+
+
+def _check_musetalk_health() -> tuple[bool, dict]:
+    """检查本地 MuseTalk 健康状态，返回 (ok, info)."""
+    try:
+        r = requests.get(f"{Config.muse_talk_url}/health", timeout=5)
+        if r.status_code == 200:
+            try:
+                return True, r.json()
+            except Exception:
+                return True, {}
+        return False, {"status_code": r.status_code, "body": r.text[:200]}
+    except Exception as exc:
+        return False, {"error": str(exc)}
+
+
+def _register(task_id: Optional[str] = None) -> bool:
+    """向服务端注册 / 心跳，附带 GPU 信息。
+
+    推理期间的心跳线程传 task_id：服务端会同步刷新该 processing 任务的
+    last_heartbeat_at，防止长推理被误判超时回收。
+    """
+    ok, info = _check_musetalk_health()
+    free_vram = int(info.get("free_vram_mb", 0) or 0) if isinstance(info, dict) else 0
+    gpu_name = info.get("gpu_name", "") if isinstance(info, dict) else ""
+    if not gpu_name:
+        # 尝试在 Windows 上读 nvidia-smi
+        gpu_name = _probe_gpu_name()
+    payload = {
+        "worker_id": Config.derived_worker_id(),
+        "hostname": platform.node(),
+        "gpu_name": gpu_name,
+        "free_vram_mb": free_vram,
+        "capabilities": "musetalk",
+    }
+    if task_id:
+        payload["task_id"] = task_id
+    try:
+        r = requests.post(
+            f"{Config.api_base_url}/api/v1/gpu/register",
+            json=payload,
+            headers=_api_headers(),
+            timeout=15,
+        )
+        if r.status_code == 200:
+            return True
+        logger.error("注册/心跳失败: HTTP %d body=%s", r.status_code, r.text[:300])
+        return False
+    except Exception as exc:
+        logger.error("注册/心跳异常: %s", exc)
+        return False
+
+
+def _probe_gpu_name() -> str:
+    """尽力探测 GPU 型号（不强制依赖 pynvml）."""
+    try:
+        import subprocess
+
+        out = subprocess.check_output(
+            ["nvidia-smi", "--query-gpu=name", "--format=csv,noheader"],
+            stderr=subprocess.DEVNULL,
+            timeout=5,
+        )
+        return out.decode("utf-8", errors="ignore").strip().splitlines()[0].strip()
+    except Exception:
+        return ""
+
+
+def _poll_task() -> Optional[dict]:
+    """轮询拉取一条待处理任务；无任务返回 None."""
+    try:
+        r = requests.get(
+            f"{Config.api_base_url}/api/v1/gpu/lipsync/poll",
+            params={"worker_id": Config.derived_worker_id()},
+            headers=_api_headers(),
+            timeout=30,
+        )
+        if r.status_code == 204:
+            return None
+        if r.status_code == 200:
+            data = r.json()
+            return data.get("task")
+        logger.error("poll 返回 %d: %s", r.status_code, r.text[:300])
+        return None
+    except Exception as exc:
+        logger.error("poll 异常: %s", exc)
+        return None
+
+
+def _download(url: str, path: Path) -> bool:
+    """下载文件到本地，支持预签名 URL."""
+    try:
+        with requests.get(url, stream=True, timeout=Config.request_timeout) as r:
+            if r.status_code >= 400:
+                logger.error("下载失败 HTTP %d: %s", r.status_code, url[:120])
+                return False
+            path.parent.mkdir(parents=True, exist_ok=True)
+            with open(path, "wb") as f:
+                for chunk in r.iter_content(chunk_size=1024 * 256):
+                    if chunk:
+                        f.write(chunk)
+        return path.stat().st_size > 0
+    except Exception as exc:
+        logger.error("下载异常 %s: %s", url[:120], exc)
+        return False
+
+
+def _call_musetalk(video_path: Path, audio_path: Path, out_path: Path) -> tuple[bool, float, str, bool]:
+    """调用本地 MuseTalk /inference.
+
+    返回 (success, duration_seconds, error_msg, retryable)。
+    duration 用 ffprobe 读结果视频，失败填 0。
+    retryable 仅对瞬时错误（连接失败/超时/5xx）为 True；HTTP 4xx、结果过小
+    等确定性失败不重试，直接上报服务端（服务端 MAX_ATTEMPTS 再决定是否重派发）。
+    """
+    try:
+        with open(video_path, "rb") as vf, open(audio_path, "rb") as af:
+            files = {
+                "video": (video_path.name, vf, "video/mp4"),
+                "audio": (audio_path.name, af, "application/octet-stream"),
+            }
+            r = requests.post(
+                f"{Config.muse_talk_url}/inference",
+                files=files,
+                timeout=Config.request_timeout,
+            )
+        if r.status_code != 200:
+            retryable = r.status_code >= 500
+            return False, 0.0, f"MuseTalk HTTP {r.status_code}: {r.text[:500]}", retryable
+        out_path.parent.mkdir(parents=True, exist_ok=True)
+        out_path.write_bytes(r.content)
+        if out_path.stat().st_size < 1024:
+            # 确定性失败（推理产物异常），本地重试大概率还是坏的，不重试
+            return False, 0.0, f"MuseTalk 返回结果过小 ({out_path.stat().st_size} bytes)", False
+        duration = _probe_duration(out_path)
+        return True, duration, "", False
+    except (requests.exceptions.Timeout, requests.exceptions.ConnectionError):
+        # 瞬时网络/超时错误，允许本地重试 1 次
+        return False, 0.0, f"MuseTalk 推理超时或连接失败（>{Config.request_timeout}s）", True
+    except Exception as exc:
+        return False, 0.0, f"MuseTalk 调用异常: {exc}", False
+
+
+def _probe_duration(path: Path) -> float:
+    """用 ffprobe 读视频时长（若系统装了 ffmpeg）；否则返回 0."""
+    try:
+        import subprocess
+
+        out = subprocess.check_output(
+            [
+                "ffprobe",
+                "-v",
+                "error",
+                "-show_entries",
+                "format=duration",
+                "-of",
+                "default=noprint_wrappers=1:nokey=1",
+                str(path),
+            ],
+            stderr=subprocess.DEVNULL,
+            timeout=10,
+        )
+        return float(out.decode().strip() or 0)
+    except Exception:
+        return 0.0
+
+
+def _upload_result(upload_url: str, file_path: Path) -> bool:
+    """PUT 上传结果视频到预签名 URL."""
+    try:
+        with open(file_path, "rb") as f:
+            r = requests.put(
+                upload_url,
+                data=f,
+                headers={"Content-Type": "video/mp4"},
+                timeout=Config.request_timeout,
+            )
+        if r.status_code >= 400:
+            logger.error("上传结果失败 HTTP %d: %s", r.status_code, r.text[:500])
+            return False
+        return True
+    except Exception as exc:
+        logger.error("上传结果异常: %s", exc)
+        return False
+
+
+def _report_result(task_id: str, success: bool, duration: float = 0.0, error_msg: str = "") -> bool:
+    """通知服务端结果。失败时也尝试上报错误（不含视频文件）."""
+    try:
+        data = {
+            "task_id": task_id,
+            "worker_id": Config.derived_worker_id(),
+            "success": "true" if success else "false",
+            "duration_seconds": str(duration),
+            "error_msg": error_msg,
+        }
+        r = requests.post(
+            f"{Config.api_base_url}/api/v1/gpu/lipsync/result",
+            data=data,
+            headers=_api_headers(),
+            timeout=30,
+        )
+        if r.status_code != 200:
+            logger.error("上报结果失败 HTTP %d: %s", r.status_code, r.text[:300])
+            return False
+        return True
+    except Exception as exc:
+        logger.error("上报结果异常: %s", exc)
+        return False
+
+
+class TaskHeartbeat(threading.Thread):
+    """推理期间的任务心跳线程。
+
+    主循环的空闲心跳在 ``_handle_task`` 同步阻塞（下载/推理/上传最长 900s）
+    期间无法发送，服务端会因任务 last_heartbeat_at 停滞而误判超时回退 pending。
+    本线程每 task_heartbeat_interval 秒（默认 30s）POST /gpu/register 并
+    携带当前 task_id，让服务端持续续期任务心跳；任务处理结束 stop()。
+    """
+
+    def __init__(self, task_id: str, interval: float):
+        super().__init__(daemon=True, name=f"hb-{task_id[:8]}")
+        self.task_id = task_id
+        self.interval = max(5.0, interval)
+        self._stop_event = threading.Event()
+
+    def run(self) -> None:
+        # 先立即发一次，再按间隔循环（首次心跳失败不影响主流程）
+        while not self._stop_event.is_set():
+            try:
+                if _register(self.task_id):
+                    logger.debug("任务 %s 心跳已发送", self.task_id)
+            except Exception as exc:  # noqa: BLE001
+                logger.warning("任务 %s 心跳异常（忽略）: %s", self.task_id, exc)
+            self._stop_event.wait(self.interval)
+
+    def stop(self) -> None:
+        self._stop_event.set()
+
+
+def _handle_task(task: dict) -> None:
+    """处理一条任务（整个串行流程：下载→时长校验→推理→上传→上报）。"""
+    task_id = task["task_id"]
+    logger.info("开始处理任务 %s", task_id)
+    # 领取任务后立即启动任务级心跳线程，覆盖下载/推理/上报全过程
+    hb = TaskHeartbeat(task_id, Config.task_heartbeat_interval)
+    hb.start()
+    try:
+        with tempfile.TemporaryDirectory(prefix="musetalk_") as tmpdir:
+            tmp = Path(tmpdir)
+            video_path = tmp / "input.mp4"
+            audio_path = tmp / "input_audio.bin"
+            out_path = tmp / "output.mp4"
+
+            # 1. 下载
+            if not _download(task["video_url"], video_path):
+                _report_result(task_id, False, 0.0, "下载人物视频失败")
+                return
+            if not _download(task["audio_url"], audio_path):
+                _report_result(task_id, False, 0.0, "下载驱动音频失败")
+                return
+
+            # 2. 输入时长前置校验：短视频 MuseTalk 会 division by zero，
+            #    直接上报 failed，不浪费 GPU 时间。ffprobe 不可用/读失败（0.0）
+            #    时不拦截，交给 MuseTalk 处理，避免误杀。
+            video_duration = _probe_duration(video_path)
+            if video_duration and video_duration < Config.min_video_duration_seconds:
+                msg = (
+                    f"视频过短（{video_duration:.2f}s < {Config.min_video_duration_seconds:.0f}s），"
+                    "MuseTalk 无法处理"
+                )
+                logger.error("任务 %s %s", task_id, msg)
+                _report_result(task_id, False, 0.0, msg)
+                return
+
+            # 3. 推理（本地仅对瞬时错误重试）
+            success = False
+            duration = 0.0
+            err = ""
+            retryable = False
+            for attempt in range(Config.task_max_retry + 1):
+                if attempt > 0:
+                    logger.info("任务 %s 第 %d 次重试（瞬时错误）...", task_id, attempt + 1)
+                    time.sleep(2)
+                success, duration, err, retryable = _call_musetalk(video_path, audio_path, out_path)
+                if success or not retryable:
+                    break
+            if not success:
+                logger.error("任务 %s 推理失败: %s", task_id, err)
+                _report_result(task_id, False, 0.0, err)
+                return
+
+            # 4. 上报结果（multipart 同时上传文件 → API 代为 PUT 到 OSS，逻辑最稳）
+            _report_success_with_file(task_id, duration, out_path)
+    finally:
+        hb.stop()
+
+
+def _report_success_with_file(task_id: str, duration: float, file_path: Path) -> None:
+    """上报成功并 multipart 附带结果视频."""
+    try:
+        data = {
+            "task_id": task_id,
+            "worker_id": Config.derived_worker_id(),
+            "success": "true",
+            "duration_seconds": str(duration),
+            "error_msg": "",
+        }
+        with open(file_path, "rb") as f:
+            files = {"result": (f"{task_id}.mp4", f, "video/mp4")}
+            r = requests.post(
+                f"{Config.api_base_url}/api/v1/gpu/lipsync/result",
+                data=data,
+                files=files,
+                headers=_api_headers(),
+                timeout=Config.request_timeout,
+            )
+        if r.status_code != 200:
+            logger.error("上报成功结果失败 HTTP %d: %s", r.status_code, r.text[:300])
+            return
+        logger.info("任务 %s 完成，duration=%.1fs", task_id, duration)
+    except Exception as exc:
+        logger.error("上报成功结果异常: %s", exc)
+
+
+# ── 主循环 ──────────────────────────────────────────────────────────
+
+
+def main() -> int:
+    logger.info("=" * 60)
+    logger.info("MuseTalk GPU Worker 启动")
+    logger.info("  worker_id   = %s", Config.derived_worker_id())
+    logger.info("  api_base    = %s", Config.api_base_url)
+    logger.info("  muse_talk   = %s", Config.muse_talk_url)
+    logger.info("  poll        = %.1fs / heartbeat = %.1fs", Config.poll_interval, Config.heartbeat_interval)
+    logger.info("=" * 60)
+
+    if not Config.gpu_worker_token:
+        logger.warning("GPU_WORKER_TOKEN 未配置（开发模式），生产环境必须设置")
+
+    # 先检查一次 MuseTalk
+    ok, info = _check_musetalk_health()
+    if ok:
+        logger.info("MuseTalk 健康检查通过: %s", info)
+    else:
+        logger.warning("MuseTalk 健康检查未通过: %s（继续运行，等待服务可用）", info)
+
+    # 启动时立即注册
+    _register()
+    last_heartbeat = time.time()
+
+    while True:
+        try:
+            # 心跳
+            now = time.time()
+            if now - last_heartbeat >= Config.heartbeat_interval:
+                if _register():
+                    last_heartbeat = now
+
+            # 轮询任务
+            task = _poll_task()
+            if task is not None:
+                _handle_task(task)
+                # 处理完立即再 poll（不 sleep），尽可能拉满 GPU
+                continue
+
+            time.sleep(Config.poll_interval)
+        except KeyboardInterrupt:
+            logger.info("收到中断信号，退出")
+            return 0
+        except Exception as exc:
+            logger.exception("主循环异常: %s", exc)
+            time.sleep(Config.poll_interval)
+
+
+if __name__ == "__main__":
+    sys.exit(main())

deploy/gpu_worker/requirements.txt

@@ -0,0 +1 @@
+requests>=2.31.0

deploy/gpu_worker/xiaoxia-gpu-worker.service

@@ -0,0 +1,21 @@
+[Unit]
+Description=MuseTalk GPU Worker (xiaoxia-saas 反向轮询)
+After=network.target musetalk.service
+# 本地 MuseTalk 服务启动后再启动本 Worker；若 MuseTalk 没有 systemd 服务则删除 musetalk.service
+
+[Service]
+Type=simple
+User=%i
+WorkingDirectory=/opt/xiaoxia-gpu-worker
+# 读取环境变量（API 地址、Token、轮询间隔等）
+EnvironmentFile=/opt/xiaoxia-gpu-worker/.env
+ExecStart=/opt/xiaoxia-gpu-worker/venv/bin/python /opt/xiaoxia-gpu-worker/gpu_worker.py
+Restart=always
+RestartSec=10
+# 日志走 journal，用 journalctl -u xiaoxia-gpu-worker -f 查看
+StandardOutput=journal
+StandardError=journal
+SyslogIdentifier=xiaoxia-gpu-worker
+
+[Install]
+WantedBy=multi-user.target

packages/adapters/sqlalchemy_impl/asset_atom_clip_repository.py

@@ -0,0 +1,138 @@
+"""素材原子片段仓储 SQLAlchemy 实现。"""
+
+from __future__ import annotations
+
+from datetime import UTC, datetime
+
+from sqlalchemy.orm import Session
+
+from packages.adapters.sqlalchemy_impl.models import AssetAtomClipModel
+from packages.domain.asset_atom_clip import AssetAtomClip
+
+
+class SQLAlchemyAssetAtomClipRepository:
+    def __init__(self, session: Session):
+        self.session = session
+
+    def create(self, clip: AssetAtomClip) -> AssetAtomClip:
+        model = self._to_model(clip)
+        self.session.add(model)
+        self.session.flush()
+        self.session.commit()
+        return clip
+
+    def batch_create(self, clips: list[AssetAtomClip]) -> list[AssetAtomClip]:
+        if not clips:
+            return []
+        models = [self._to_model(c) for c in clips]
+        self.session.add_all(models)
+        self.session.flush()
+        self.session.commit()
+        return clips
+
+    def find_by_asset(self, asset_id: str) -> list[AssetAtomClip]:
+        models = (
+            self.session.query(AssetAtomClipModel)
+            .filter(AssetAtomClipModel.asset_id == asset_id)
+            .order_by(AssetAtomClipModel.clip_index.asc())
+            .all()
+        )
+        return [self._to_domain(m) for m in models]
+
+    def find_by_id(self, clip_id: str) -> AssetAtomClip | None:
+        model = self.session.query(AssetAtomClipModel).filter(AssetAtomClipModel.id == clip_id).first()
+        if model is None:
+            return None
+        return self._to_domain(model)
+
+    def find_by_ids(self, clip_ids: list[str]) -> list[AssetAtomClip]:
+        if not clip_ids:
+            return []
+        models = self.session.query(AssetAtomClipModel).filter(AssetAtomClipModel.id.in_(clip_ids)).all()
+        return [self._to_domain(m) for m in models]
+
+    def delete_by_asset(self, asset_id: str) -> int:
+        count = (
+            self.session.query(AssetAtomClipModel)
+            .filter(AssetAtomClipModel.asset_id == asset_id)
+            .delete(synchronize_session=False)
+        )
+        self.session.commit()
+        return count
+
+    def count_by_asset(self, asset_id: str) -> int:
+        return self.session.query(AssetAtomClipModel).filter(AssetAtomClipModel.asset_id == asset_id).count()
+
+    def find_candidates_for_selection(
+        self,
+        asset_ids: list[str],
+        *,
+        min_duration: float | None = None,
+        max_duration: float | None = None,
+        limit: int = 100,
+    ) -> list[AssetAtomClip]:
+        """按筛选条件查找候选原子片段，按时长排序。用于选片逻辑。"""
+        query = self.session.query(AssetAtomClipModel).filter(AssetAtomClipModel.asset_id.in_(asset_ids))
+        if min_duration is not None:
+            query = query.filter(AssetAtomClipModel.duration >= min_duration)
+        if max_duration is not None:
+            query = query.filter(AssetAtomClipModel.duration <= max_duration)
+        query = query.order_by(AssetAtomClipModel.clip_index.asc())
+        if limit > 0:
+            query = query.limit(limit)
+        models = query.all()
+        return [self._to_domain(m) for m in models]
+
+    def update_ai_tags(self, clip_id: str, ai_tags: dict) -> bool:
+        """更新指定片段的 ai_tags 字段."""
+        count = (
+            self.session.query(AssetAtomClipModel).filter(AssetAtomClipModel.id == clip_id).update({"ai_tags": ai_tags})
+        )
+        self.session.commit()
+        return count > 0
+
+    def find_untagged(self, limit: int = 100, include_downgraded: bool = False) -> list[AssetAtomClip]:
+        """查找未完成 AI 打标的片段，用于回填.
+
+        默认仅匹配 ai_tags IS NULL；include_downgraded=True 时额外包含
+        只有 inherited_tags 的降级记录（视觉 API 失败时写入，无 has_text 字段），
+        供强制回填（#1970 force backfill）使用。
+        """
+        query = self.session.query(AssetAtomClipModel)
+        if include_downgraded:
+            # as_string() → JSON/JSONB ->> 取值；NULL 记录或缺 has_text 键
+            # （降级记录）均为 NULL，has_text 为 true/false 的完整记录被排除
+            query = query.filter(AssetAtomClipModel.ai_tags["has_text"].as_string().is_(None))
+        else:
+            query = query.filter(AssetAtomClipModel.ai_tags.is_(None))
+        models = query.order_by(AssetAtomClipModel.created_at.asc()).limit(limit).all()
+        return [self._to_domain(m) for m in models]
+
+    def _to_model(self, clip: AssetAtomClip) -> AssetAtomClipModel:
+        return AssetAtomClipModel(
+            id=clip.id,
+            asset_id=clip.asset_id,
+            start_time=clip.start_time,
+            end_time=clip.end_time,
+            duration=clip.duration,
+            clip_index=clip.clip_index,
+            tags=clip.tags,
+            ai_tags=clip.ai_tags,
+            scene_change_at=clip.scene_change_at,
+            is_fallback=clip.is_fallback,
+            created_at=clip.created_at or datetime.now(UTC),
+        )
+
+    def _to_domain(self, model: AssetAtomClipModel) -> AssetAtomClip:
+        return AssetAtomClip(
+            id=model.id,
+            asset_id=model.asset_id,
+            start_time=model.start_time,
+            end_time=model.end_time,
+            duration=model.duration,
+            clip_index=model.clip_index,
+            tags=model.tags or [],
+            scene_change_at=model.scene_change_at,
+            is_fallback=model.is_fallback,
+            created_at=model.created_at,
+        )

packages/adapters/sqlalchemy_impl/edit_plan_clip_repository.py

@@ -50,6 +50,7 @@ class SQLAlchemyEditPlanClipRepository:
             order=clip.order,
             template_clip_config_id=clip.template_clip_config_id,
             asset_id=clip.asset_id,
+            atom_clip_id=getattr(clip, "atom_clip_id", "") or "",
             text_content=clip.text_content,
             start_time=clip.start_time,
             duration=clip.duration,
@@ -74,6 +75,7 @@ class SQLAlchemyEditPlanClipRepository:
         model.order = clip.order
         model.template_clip_config_id = clip.template_clip_config_id
         model.asset_id = clip.asset_id
+        model.atom_clip_id = getattr(clip, "atom_clip_id", "") or ""
         model.text_content = clip.text_content
         model.start_time = clip.start_time
         model.duration = clip.duration
@@ -120,6 +122,7 @@ class SQLAlchemyEditPlanClipRepository:
             order=model.order,
             template_clip_config_id=model.template_clip_config_id or "",
             asset_id=model.asset_id or "",
+            atom_clip_id=getattr(model, "atom_clip_id", "") or "",
             text_content=model.text_content or "",
             start_time=model.start_time or 0.0,
             duration=model.duration or 0.0,
@@ -193,3 +196,53 @@ class SQLAlchemyEditPlanClipRepository:
             result[asset_id].append((start_time or 0.0, (start_time or 0.0) + (duration or 0.0)))
 
         return result
+
+    def list_recent_atom_clip_ids_by_user(
+        self,
+        user_id: str,
+        *,
+        limit: int = 200,
+    ) -> list[str]:
+        """#1970 跨视频原子片段级避让：查询用户最近成片用过的 atom_clip_id.
+
+        只统计已完成 plan 下已渲染且 atom_clip_id 非空的 clips，按 plan
+        创建时间倒序，返回去重后的 ID 列表。
+        """
+        from packages.adapters.sqlalchemy_impl.models import EditPlanModel
+
+        if not user_id:
+            return []
+
+        recent_plan_ids = [
+            row[0]
+            for row in self.session.query(EditPlanModel.id)
+            .filter(
+                EditPlanModel.created_by_user_id == user_id,
+                EditPlanModel.status == "completed",
+            )
+            .order_by(EditPlanModel.created_at.desc())
+            .limit(50)
+            .all()
+        ]
+        if not recent_plan_ids:
+            return []
+
+        rows = (
+            self.session.query(EditPlanClipModel.atom_clip_id)
+            .filter(
+                EditPlanClipModel.plan_id.in_(recent_plan_ids),
+                EditPlanClipModel.status == "rendered",
+                EditPlanClipModel.atom_clip_id.isnot(None),
+                EditPlanClipModel.atom_clip_id != "",
+            )
+            .all()
+        )
+        seen: set[str] = set()
+        ordered: list[str] = []
+        for (atom_clip_id,) in rows:
+            if atom_clip_id and atom_clip_id not in seen:
+                seen.add(atom_clip_id)
+                ordered.append(atom_clip_id)
+            if len(ordered) >= limit:
+                break
+        return ordered

packages/adapters/sqlalchemy_impl/models.py

@@ -1,7 +1,20 @@
 from datetime import UTC, datetime
 from typing import Any
 
-from sqlalchemy import JSON, Boolean, Column, DateTime, Float, Index, Integer, String, Text, UniqueConstraint, text
+from sqlalchemy import (
+    JSON,
+    Boolean,
+    Column,
+    DateTime,
+    Float,
+    ForeignKey,
+    Index,
+    Integer,
+    String,
+    Text,
+    UniqueConstraint,
+    text,
+)
 from sqlalchemy.orm import declarative_base
 
 Base: Any = declarative_base()
@@ -234,6 +247,8 @@ class EditPlanClipModel(Base):
     order = Column(Integer, nullable=False)
     template_clip_config_id = Column(String(36), nullable=False, default="", index=True)
     asset_id = Column(String(36), nullable=False, default="", index=True)
+    # #1970 原子化切片：片段选中的原子片段 ID（空串表示旧的整条素材选取路径）
+    atom_clip_id = Column(String(36), nullable=False, default="", index=True)
     text_content = Column(Text, nullable=False, default="")
     start_time = Column(Float, nullable=False, default=0.0)
     duration = Column(Float, nullable=False, default=0.0)
@@ -801,6 +816,33 @@ class PointsOrderModel(Base):
     created_at = Column(DateTime, nullable=False, default=lambda: datetime.now(UTC))
 
 
+class AssetAtomClipModel(Base):
+    """素材原子片段 ORM 模型 (#1970 智能剪辑流程重构)。
+
+    逻辑切分单元，不物理切割视频文件。
+    """
+
+    __tablename__ = "asset_atom_clips"
+    __table_args__ = (UniqueConstraint("asset_id", "clip_index", name="uq_asset_atom_clips_asset_index"),)
+
+    id = Column(String(36), primary_key=True)
+    asset_id = Column(
+        String(36),
+        ForeignKey("assets.id", ondelete="CASCADE"),
+        nullable=False,
+        index=True,
+    )
+    start_time = Column(Float, nullable=False)
+    end_time = Column(Float, nullable=False)
+    duration = Column(Float, nullable=False)
+    clip_index = Column(Integer, nullable=False)
+    tags = Column(JSON, nullable=False, default=list)
+    ai_tags = Column(JSON, nullable=True, default=None)
+    scene_change_at = Column(Float, nullable=True)
+    is_fallback = Column(Boolean, nullable=False, default=False)
+    created_at = Column(DateTime, nullable=False, default=lambda: datetime.now(UTC))
+
+
 class DailyUsageRecordModel(Base):
     """每日使用记录 ORM 模型 (#1895)"""
 
@@ -813,3 +855,61 @@ class DailyUsageRecordModel(Base):
     usage_type = Column(String(50), nullable=False, default="free_clip")
     count = Column(Integer, nullable=False, default=0)
     updated_at = Column(DateTime, nullable=False, default=lambda: datetime.now(UTC))
+
+
+class GpuLipsyncTaskModel(Base):
+    """GPU 口型同步任务 ORM 模型 — MuseTalk 反向轮询模式.
+
+    业务侧（AI 数字人生成/lipsync 流程）提交任务后，GPU Worker 主动 poll 拉取、
+    调用本地 MuseTalk 推理、再通过 result 接口回传结果视频。
+    """
+
+    __tablename__ = "gpu_lipsync_tasks"
+
+    id = Column(String(36), primary_key=True)
+    # 业务关联（原 lipsync_job_id，方便双向查询）
+    lipsync_job_id = Column(String(36), nullable=False, default="", index=True)
+    user_id = Column(String(36), nullable=False, default="", index=True)
+    project_id = Column(String(36), nullable=False, default="", index=True)
+
+    # 输入（预签名下载 URL，由 API 侧生成）
+    video_url = Column(Text, nullable=False)
+    audio_url = Column(Text, nullable=False)
+
+    # 结果
+    result_url = Column(Text, nullable=False, default="")
+    result_duration = Column(Float, nullable=False, default=0.0)
+
+    # 任务状态
+    status = Column(
+        String(20),
+        nullable=False,
+        default="pending",
+        index=True,
+    )  # pending → processing → done / failed / timeout
+    worker_id = Column(String(100), nullable=False, default="", index=True)
+    attempt = Column(Integer, nullable=False, default=0)
+    error_msg = Column(Text, nullable=False, default="")
+
+    # 时间戳
+    created_at = Column(DateTime, nullable=False, default=lambda: datetime.now(UTC))
+    started_at = Column(DateTime, nullable=True)
+    finished_at = Column(DateTime, nullable=True)
+    updated_at = Column(DateTime, nullable=False, default=lambda: datetime.now(UTC))
+
+    # 心跳：worker 最近一次 poll/result 的时间，用于判定 worker 失联
+    last_heartbeat_at = Column(DateTime, nullable=True)
+
+
+class GpuWorkerModel(Base):
+    """GPU Worker 注册表 — 反向轮询模式下用于心跳与监控."""
+
+    __tablename__ = "gpu_workers"
+
+    worker_id = Column(String(100), primary_key=True)
+    hostname = Column(String(200), nullable=False, default="")
+    gpu_name = Column(String(200), nullable=False, default="")
+    free_vram_mb = Column(Integer, nullable=False, default=0)
+    capabilities = Column(String(500), nullable=False, default="")  # 逗号分隔，如 "musetalk"
+    last_heartbeat_at = Column(DateTime, nullable=True, index=True)
+    created_at = Column(DateTime, nullable=False, default=lambda: datetime.now(UTC))

packages/config/base.py

@@ -68,6 +68,7 @@ class SharedSettings(BaseSettings):
     doubao_base_url: str = "https://ark.cn-beijing.volces.com/api/v3"
     doubao_timeout: int = 30
     doubao_max_retries: int = 2
+    doubao_vision_model: str = "doubao-1-5-vision-pro-250915"
 
     # ── MediaKit (火山引擎 AI 媒体工具) ──────────────────────────────────
     mediakit_api_key: str = ""
@@ -79,6 +80,29 @@ class SharedSettings(BaseSettings):
     # `if settings.points_enabled:` 包裹，防止未完善的扣点逻辑影响现有用户。
     points_enabled: bool = False
 
+    # ── GPU MuseTalk 反向轮询 Worker ────────────────────────────────────
+    # Worker 用这个长期 Token 鉴权（不是用户 JWT）。多 Worker 共用同一个 Token；
+    # worker_id 用于区分具体机器。生产必须配置；development 留空会跳过校验。
+    gpu_worker_token: str = ""
+    # GPU 任务超时（秒）：processing 状态超过此时长（以任务心跳为准）才回退
+    # pending / failed。#1970：RTX2060 6G 推理 720p 长视频需 5 分钟以上，300→900。
+    # Worker 推理期间每 30s 通过 /gpu/register(task_id=...) 续心跳，
+    # 只有真正超时或 Worker 明确上报 failed 才会回退。
+    gpu_task_timeout_seconds: int = 900
+    # 结果预签名 URL 有效期（秒）
+    gpu_result_url_expires: int = 3600
+    # 输入预签名 URL 有效期（秒，需留出 Worker 下载时间）
+    gpu_input_url_expires: int = 3600
+    # 业务侧是否启用 GPU 口型同步（开关）；关或无可用 Worker 时回退 MediaKit 云端
+    use_gpu_lipsync: bool = False
+    # 业务侧轮询 GPU 任务结果的间隔（秒）
+    gpu_lipsync_poll_interval: float = 5.0
+    # 业务侧等待 GPU 任务结果的总超时（秒）；超时后回退 MediaKit。
+    # 应小于等于 gpu_task_timeout_seconds（默认900s）+ 冗余，留足 Worker 下载/上传时间。
+    gpu_lipsync_wait_timeout: int = 1200
+    # 判断 Worker 可用的心跳新鲜度窗口（秒）—— last_heartbeat_at 在窗口内视为在线
+    gpu_worker_stale_seconds: int = 300
+
     @property
     def effective_database_url(self) -> str:
         """返回实际使用的数据库 URL。

packages/domain/__init__.py

@@ -1,5 +1,18 @@
 """Domain package for core business entities and rules."""
 
+from . import atom_clip_resolver
+from .asset_atom_clip import AssetAtomClip
+from .atom_clip_selector import (
+    ScoredAtomClip,
+    clips_to_segments,
+    estimate_required_clip_count,
+    score_atom_clip,
+    select_atom_clips,
+)
+from .atom_clip_service import (
+    compute_atom_clips,
+    compute_fallback_clips,
+)
 from .classification import (
     AssetClassification,
     ClassificationJob,
@@ -37,6 +50,15 @@ from .voice_library import VoiceLibraryItem
 
 __all__ = [
     "Asset",
+    "AssetAtomClip",
+    "ScoredAtomClip",
+    "clips_to_segments",
+    "compute_atom_clips",
+    "compute_fallback_clips",
+    "estimate_required_clip_count",
+    "score_atom_clip",
+    "select_atom_clips",
+    "atom_clip_resolver",
     "AssetClassification",
     "DailyUsageRecord",
     "PointsAccount",

packages/domain/asset_atom_clip.py

@@ -0,0 +1,82 @@
+"""素材原子片段（Atom Clip）领域实体 — #1970 智能剪辑流程重构。
+
+原子片段是素材的逻辑切分单元，不物理切割视频文件。
+每条记录指向某条素材的一段 [start_time, end_time] 区间。
+"""
+
+from __future__ import annotations
+
+import uuid
+from dataclasses import dataclass, field
+from datetime import UTC, datetime
+
+
+@dataclass
+class AssetAtomClip:
+    """素材原子片段。
+
+    Attributes:
+        id: 唯一标识。
+        asset_id: 所属素材 ID。
+        start_time: 片段起始时间（秒，浮点）。
+        end_time: 片段结束时间（秒，浮点）。
+        duration: 片段时长 = end_time - start_time（秒）。
+        clip_index: 在同一素材内的顺序编号（从 0 开始）。
+        tags: 继承自素材的标签，JSONB 存储，可为空列表。
+        scene_change_at: 片段尾部是否对齐了 scdet 镜头切换点（存储该切点的精确时间），
+                         未对齐时为 None。
+        is_fallback: 是否为兜底逻辑在内存中生成的临时片段（不入库）。
+        created_at: 创建时间。
+    """
+
+    id: str
+    asset_id: str
+    start_time: float
+    end_time: float
+    duration: float
+    clip_index: int
+    tags: list[str] = field(default_factory=list)
+    ai_tags: dict | None = None
+    scene_change_at: float | None = None
+    is_fallback: bool = False
+    created_at: datetime | None = None
+
+    def __post_init__(self):
+        if not self.id:
+            self.id = str(uuid.uuid4())
+        if self.duration <= 0:
+            self.duration = round(self.end_time - self.start_time, 3)
+        if self.duration < 0:
+            raise ValueError(f"duration must be >= 0, got start={self.start_time}, end={self.end_time}")
+        if self.start_time < 0:
+            raise ValueError(f"start_time must be >= 0, got {self.start_time}")
+        if self.end_time <= self.start_time:
+            raise ValueError(f"end_time must be > start_time, got start={self.start_time}, end={self.end_time}")
+        if self.clip_index < 0:
+            raise ValueError(f"clip_index must be >= 0, got {self.clip_index}")
+        if self.created_at is None:
+            self.created_at = datetime.now(UTC)
+
+    @classmethod
+    def create(
+        cls,
+        asset_id: str,
+        start_time: float,
+        end_time: float,
+        clip_index: int,
+        tags: list[str] | None = None,
+        scene_change_at: float | None = None,
+        is_fallback: bool = False,
+    ) -> AssetAtomClip:
+        """工厂方法：创建一个新的原子片段。"""
+        return cls(
+            id="",  # __post_init__ 会自动生成
+            asset_id=asset_id,
+            start_time=round(start_time, 3),
+            end_time=round(end_time, 3),
+            duration=round(end_time - start_time, 3),
+            clip_index=clip_index,
+            tags=tags or [],
+            scene_change_at=scene_change_at,
+            is_fallback=is_fallback,
+        )

packages/domain/atom_clip_resolver.py

@@ -0,0 +1,104 @@
+"""原子片段加载与兜底 — #1970 智能剪辑流程重构 P1.
+
+选片前从 ``asset_atom_clips`` 表加载素材池的原子片段；老素材/切片任务尚未
+完成/切片失败导致某些素材没有片段时，按需求兜底：内存中按 3-6 秒临时均匀
+切片（不存库，片段标记 is_fallback=True）。
+
+本模块对 repository 做鸭子类型约束（只需 find_by_asset / find_candidates_for_selection
+和 asset_repo.get），方便 API 侧（SQLAlchemy）与 worker 侧复用，也便于单测注入内存假实现。
+"""
+
+from __future__ import annotations
+
+import logging
+
+from packages.domain.asset_atom_clip import AssetAtomClip
+from packages.domain.atom_clip_service import compute_fallback_clips
+
+logger = logging.getLogger(__name__)
+
+# 兜底均匀切片步长（秒），落在 3~6s 区间中段
+FALLBACK_CLIP_SECONDS = 4.5
+
+
+def load_atom_clips_for_assets(
+    asset_ids: list[str],
+    *,
+    atom_clip_repo,
+    asset_repo=None,
+) -> dict[str, list[AssetAtomClip]]:
+    """加载素材池的原子片段（缺失素材走内存兜底）.
+
+    Args:
+        asset_ids: 候选素材 ID（去重保序）。
+        atom_clip_repo: AssetAtomClipRepository 实现（需有
+            ``find_candidates_for_selection`` 或 ``find_by_asset``）。
+        asset_repo: 可选，素材仓储（需有 ``get``），用于读取时长兜底切片。
+            为 None 时，没有原子片段的素材直接跳过（不兜底）。
+
+    Returns:
+        {asset_id: [AssetAtomClip, ...]}，仅包含至少有一个片段的素材，
+        片段按 clip_index 排序。
+    """
+    result: dict[str, list[AssetAtomClip]] = {}
+    unique_ids = list(dict.fromkeys(asset_ids))
+    if not unique_ids:
+        return result
+
+    # 1. 批量查询已生成的原子片段
+    persisted: dict[str, list[AssetAtomClip]] = {}
+    try:
+        if hasattr(atom_clip_repo, "find_candidates_for_selection"):
+            clips = atom_clip_repo.find_candidates_for_selection(unique_ids, limit=0)
+        else:
+            clips = []
+            for asset_id in unique_ids:
+                clips.extend(atom_clip_repo.find_by_asset(asset_id))
+        for clip in clips:
+            persisted.setdefault(clip.asset_id, []).append(clip)
+    except Exception:
+        logger.warning("加载 atom_clips 失败，全部走内存兜底", exc_info=True)
+        persisted = {}
+
+    for asset_id in unique_ids:
+        clips = persisted.get(asset_id)
+        if clips:
+            clips.sort(key=lambda c: c.clip_index)
+            result[asset_id] = clips
+            continue
+
+        # 2. 兜底：内存均匀切片（不存库）
+        if asset_repo is None:
+            continue
+        duration = _safe_asset_duration(asset_repo, asset_id)
+        if duration <= 0:
+            continue
+        result[asset_id] = compute_fallback_clips(
+            asset_id,
+            duration,
+            clip_seconds=FALLBACK_CLIP_SECONDS,
+        )
+
+    return result
+
+
+def flatten_candidates(
+    clips_by_asset: dict[str, list[AssetAtomClip]],
+) -> list[AssetAtomClip]:
+    """把 {asset_id: [clips]} 摊平为候选片段列表（素材顺序内片段有序）。"""
+    flat: list[AssetAtomClip] = []
+    for clips in clips_by_asset.values():
+        flat.extend(clips)
+    return flat
+
+
+def _safe_asset_duration(asset_repo, asset_id: str) -> float:
+    """安全读取素材时长，任何异常返回 0。"""
+    try:
+        asset = asset_repo.get(asset_id)
+        if asset is None:
+            return 0.0
+        return float(getattr(asset, "duration", 0.0) or 0.0)
+    except Exception:
+        logger.warning("读取素材时长失败: asset_id=%s", asset_id, exc_info=True)
+        return 0.0

packages/domain/atom_clip_selector.py

@@ -0,0 +1,264 @@
+"""原子片段级选片核心 — #1970 智能剪辑流程重构 P1.
+
+选片单元从"整条素材 + 随机起点"升级为"原子片段（atom clip）"：
+
+- 每个 EditPlanClip 指向一个 atom_clip_id（含 asset_id + start/end）；
+- 同一素材的不同原子片段可被同一视频多次选用；
+- 同一原子片段在一个视频内只用一次；
+- 跨变体/跨任务的避让升级为原子片段级（同 asset 的不同片段天然不重叠）；
+- atom_clips 未就绪（老素材/切片失败）时由调用方走内存兜底切片，
+  再不行回退到现有的整条素材随机起点逻辑。
+
+本模块是纯函数：原子片段数据由调用方从 repository 读取后注入，不直接碰 DB，
+便于单元测试。评分维度与 smart_match 保持一致（质量分、时长适配、新鲜度、
+未使用加分），只是评分对象从素材变为原子片段。
+"""
+
+from __future__ import annotations
+
+import random
+from dataclasses import dataclass
+from typing import Any
+
+from packages.domain.asset_atom_clip import AssetAtomClip
+
+
+@dataclass(slots=True)
+class ScoredAtomClip:
+    """带评分的候选原子片段。"""
+
+    clip: AssetAtomClip
+    score: float
+
+    @property
+    def atom_clip_id(self) -> str:
+        return self.clip.id
+
+    @property
+    def asset_id(self) -> str:
+        return self.clip.asset_id
+
+    @property
+    def start_time(self) -> float:
+        return self.clip.start_time
+
+    @property
+    def end_time(self) -> float:
+        return self.clip.end_time
+
+    @property
+    def duration(self) -> float:
+        return self.clip.duration
+
+
+# 评分权重（与 smart_match.score_asset 的维度对齐）
+W_QUALITY = 0.35
+W_DURATION_FIT = 0.30
+W_FRESHNESS = 0.15
+W_UNUSED_BONUS = 0.10
+W_ASSET_BALANCE = 0.10
+
+# 评分随机噪声上限（与 SCORE_RANDOM_NOISE_MAX 同量级，避免反复选同一组合）
+SCORE_NOISE_MAX = 0.05
+
+
+def score_atom_clip(
+    clip: AssetAtomClip,
+    *,
+    target_duration: float,
+    asset_quality: dict[str, float] | None = None,
+    asset_freshness: dict[str, float] | None = None,
+    used_in_video: set[str] | None = None,
+    asset_usage_counts: dict[str, int] | None = None,
+    recently_used: set[str] | None = None,
+    required_count: int = 1,
+    total_candidates: int = 1,
+) -> float:
+    """评估单个原子片段对某个目标槽位的适配分（越高越优先）.
+
+    评分维度：
+    - 质量分（继承素材质量，缺省中性 0.6）；
+    - 时长适配（片段时长越接近目标越好，覆盖不满显著扣分）；
+    - 新鲜度（缺省中性 0.5）；
+    - 未使用加分（本视频内未用过 +1，已用 0）；
+    - 素材均衡（同一素材在本视频用得越多，其剩余片段扣分越多，鼓励分散到多素材）；
+    - 跨视频/历史使用降权（recently_used 中的片段扣分，不硬禁）。
+    """
+    asset_quality = asset_quality or {}
+    asset_freshness = asset_freshness or {}
+    used_in_video = used_in_video or set()
+    asset_usage_counts = asset_usage_counts or {}
+    recently_used = recently_used or set()
+
+    quality = asset_quality.get(clip.asset_id, 0.6)
+
+    if target_duration > 0:
+        coverage = min(1.0, clip.duration / target_duration)
+        overshoot = max(0.0, (clip.duration - target_duration) / target_duration)
+        duration_fit = max(0.0, coverage - 0.15 * overshoot)
+    else:
+        duration_fit = 0.5
+
+    freshness = asset_freshness.get(clip.asset_id, 0.5)
+    unused_bonus = 0.0 if clip.id in used_in_video else 1.0
+
+    # 素材均衡：该素材已被本视频选用 k 次，其片段逐次扣分
+    times_used = asset_usage_counts.get(clip.asset_id, 0)
+    balance = 1.0 / (1.0 + times_used)
+
+    # 跨视频/历史使用降权（不硬禁）
+    history_penalty = 0.35 if clip.id in recently_used else 0.0
+
+    score = (
+        W_QUALITY * quality
+        + W_DURATION_FIT * duration_fit
+        + W_FRESHNESS * freshness
+        + W_UNUSED_BONUS * unused_bonus
+        + W_ASSET_BALANCE * balance
+        - history_penalty
+    )
+    return score
+
+
+def select_atom_clips(
+    candidates: list[AssetAtomClip],
+    *,
+    target_duration: float = 0.0,
+    used_atom_clip_ids: set[str] | None = None,
+    asset_usage_counts: dict[str, int] | None = None,
+    recently_used_atom_ids: set[str] | None = None,
+    required_count: int = 1,
+    limit: int = 0,
+    asset_quality: dict[str, float] | None = None,
+    asset_freshness: dict[str, float] | None = None,
+    rng: random.Random | None = None,
+) -> list[ScoredAtomClip]:
+    """为一个目标槽位从候选原子片段中评分选片（纯函数）.
+
+    Args:
+        candidates: 候选原子片段（可跨多素材）。
+        target_duration: 槽位目标时长（秒）。
+        used_atom_clip_ids: 本视频已用过的原子片段 ID（硬排除，同片段不重复）。
+        asset_usage_counts: 本视频各素材已选片段数（均衡评分用）。
+        recently_used_atom_ids: 跨视频/历史成片用过的片段 ID（降权，不硬禁）。
+        required_count: 整个视频需要的片段总数（预留，供覆盖策略判断）。
+        limit: 最多返回条数；<=0 表示返回全部排序结果。
+        asset_quality / asset_freshness: 评分注入。
+        rng: 可选随机源（测试注入）。
+
+    Returns:
+        评分降序的 ScoredAtomClip 列表（已排除本视频用过的片段）。
+    """
+    rng = rng or random.Random()
+    used = used_atom_clip_ids or set()
+    asset_usage_counts = asset_usage_counts or {}
+    recently_used = recently_used_atom_ids or set()
+
+    available = [c for c in candidates if c.id not in used]
+    scored: list[ScoredAtomClip] = []
+    for clip in available:
+        base = score_atom_clip(
+            clip,
+            target_duration=target_duration,
+            asset_quality=asset_quality,
+            asset_freshness=asset_freshness,
+            used_in_video=used,
+            asset_usage_counts=asset_usage_counts,
+            recently_used=recently_used,
+            required_count=required_count,
+            total_candidates=len(candidates),
+        )
+        noise = rng.uniform(0.0, SCORE_NOISE_MAX)
+        scored.append(ScoredAtomClip(clip=clip, score=base + noise))
+
+    scored.sort(key=lambda s: s.score, reverse=True)
+    if limit and limit > 0:
+        return scored[:limit]
+    return scored
+
+
+def clips_to_segments(clips: list[AssetAtomClip]) -> dict[str, list[tuple[float, float]]]:
+    """把选中的原子片段转换为旧的 {asset_id: [(start, end), ...]} 区间结构.
+
+    用于与现有跨变体区间避让（variant_plan_selector / metadata.used_segments）对接。
+    原子片段级天然不重叠，同素材多片段直接形成多段不重叠区间。
+    """
+    segments: dict[str, list[tuple[float, float]]] = {}
+    for clip in clips:
+        segments.setdefault(clip.asset_id, []).append((clip.start_time, clip.end_time))
+    for asset_id in segments:
+        segments[asset_id].sort()
+    return segments
+
+
+def estimate_required_clip_count(
+    voice_total_duration: float,
+    average_clip_duration: float = 4.5,
+) -> int:
+    """配音总时长 / 平均片段时长 ≈ 需要的片段数（至少 1）。"""
+    if voice_total_duration <= 0 or average_clip_duration <= 0:
+        return 1
+    return max(1, round(voice_total_duration / average_clip_duration))
+
+
+def reselect_clips_from_atoms(
+    source_clips: list[dict[str, Any]],
+    candidates: list[AssetAtomClip],
+    *,
+    historical_atom_ids: set[str] | None = None,
+    batch_used_atom_ids: set[str] | None = None,
+    rng: random.Random | None = None,
+) -> list[dict[str, Any]] | None:
+    """#1970 变体重选的原子片段级实现.
+
+    与 variant_plan_selector.reselect_clips_for_variant 对应：保留源 plan 的
+    片段骨架（order/clip_type/文案/转场），从候选原子片段中为每个 main 片段
+    选取一个原子片段；同变体/批次内同一片段不可重复，历史成片用过的片段降权。
+
+    Returns:
+        新 clips_data（dict 列表，含 asset_id/atom_clip_id/start_time/duration），
+        候选不足（main 片段多于去重后片段数）时返回 None，由调用方回退整条素材路径。
+        非 main 片段（intro/outro 等）原样保留不分配素材。
+    """
+    if not source_clips or not candidates:
+        return None
+
+    rng = rng or random.Random()
+    main_indexes = [i for i, c in enumerate(source_clips) if c.get("clip_type", "main") == "main"]
+    if len(main_indexes) > len({c.id for c in candidates}):
+        return None
+
+    used: set[str] = set(batch_used_atom_ids or ())
+    result: list[dict[str, Any]] = [dict(c) for c in source_clips]
+    asset_usage: dict[str, int] = {}
+
+    for idx in main_indexes:
+        skeleton = source_clips[idx]
+        target_duration = float(skeleton.get("duration") or 0.0)
+        ranked = select_atom_clips(
+            candidates,
+            target_duration=target_duration,
+            used_atom_clip_ids=used,
+            asset_usage_counts=asset_usage,
+            recently_used_atom_ids=historical_atom_ids or set(),
+            required_count=len(main_indexes),
+            limit=1,
+            rng=rng,
+        )
+        if not ranked:
+            return None
+        picked = ranked[0]
+        # 段长：片段短于槽位时取片段全长（渲染末帧冻结铺满），长于槽位时按槽位时长 trim
+        new_duration = picked.duration if target_duration <= 0 else min(target_duration, picked.duration)
+        result[idx].update(
+            {
+                "asset_id": picked.asset_id,
+                "atom_clip_id": picked.atom_clip_id,
+                "start_time": round(picked.start_time, 3),
+                "duration": round(new_duration, 3),
+            }
+        )
+        used.add(picked.atom_clip_id)
+        asset_usage[picked.asset_id] = asset_usage.get(picked.asset_id, 0) + 1
+
+    return result

packages/domain/atom_clip_service.py

@@ -0,0 +1,215 @@
+"""素材原子切片服务 — #1970 智能剪辑流程重构 P1.
+
+切片规则（见 docs/smart-edit-flow-redesign-20260916.md §1）：
+- 3~6 秒一个片段，具体时长在此范围内随机（避免固定节奏）
+- 切点附近 0.5 秒内有 scdet 镜头切换点时，切点偏移到切换处
+  （复用素材 metadata 中已缓存的 scene_change_points，不重新计算）
+- <6 秒素材整条作为一个片段，不切
+- 最后一个片段不足 3 秒的合并到前一个；超过 3 秒独立成段
+- 片段是逻辑索引，不物理切割视频文件
+
+片段在内存中计算；持久化由上层调用 repository 完成，保证本模块可单测、无 IO 依赖。
+"""
+
+from __future__ import annotations
+
+import random
+
+from packages.domain.asset_atom_clip import AssetAtomClip
+
+# 切片参数（集中常量，便于后续抽配置）
+MIN_CLIP_SECONDS = 3.0
+MAX_CLIP_SECONDS = 6.0
+# 切点与 scdet 切换点的对齐窗口
+SCENE_SNAP_WINDOW = 0.5
+# 末段最小独立时长：不足则并入前一段
+MIN_TAIL_SECONDS = 3.0
+# 浮点比较容差
+_EPS = 0.05
+
+
+def _round3(value: float) -> float:
+    return round(float(value), 3)
+
+
+def _snap_to_scene(
+    cut: float,
+    scene_points: list[float] | None,
+    lower: float,
+    upper: float,
+) -> tuple[float, float | None]:
+    """将切点 ``cut`` 对齐到窗口内最近的 scdet 切换点.
+
+    Args:
+        cut: 原始切点（秒）。
+        scene_points: 候选切换点（秒，已排序），可为空。
+        lower: 允许偏移的下界（不早于当前片段起点）。
+        upper: 允许偏移的上界（不晚于素材总时长）。
+
+    Returns:
+        (对齐后的切点, 命中的切换点)；未命中返回 (cut, None)。
+    """
+    if not scene_points:
+        return cut, None
+
+    best: float | None = None
+    best_dist = SCENE_SNAP_WINDOW
+    for point in scene_points:
+        # 切换点必须严格落在片段内部（不能与边界重合），且在窗口内
+        if point <= lower + _EPS or point >= upper - _EPS:
+            continue
+        dist = abs(point - cut)
+        if dist <= best_dist:
+            best_dist = dist
+            best = point
+    if best is None:
+        return cut, None
+    return _round3(best), _round3(best)
+
+
+def compute_atom_clips(
+    asset_id: str,
+    duration: float,
+    *,
+    scene_change_points: list[float] | None = None,
+    tags: list[str] | None = None,
+    rng: random.Random | None = None,
+) -> list[AssetAtomClip]:
+    """根据素材时长计算原子片段（纯函数，不落库）.
+
+    Args:
+        asset_id: 素材 ID。
+        duration: 素材总时长（秒）。
+        scene_change_points: metadata 中缓存的 scdet 切换点（秒）。
+        tags: 继承自素材的标签。
+        rng: 可选随机源（测试可注入固定种子）。
+
+    Returns:
+        有序的原子片段列表（clip_index 从 0 开始）。
+    """
+    if duration <= 0:
+        return []
+
+    r = rng or random.Random()
+    points = _normalize_scene_points(scene_change_points, duration)
+
+    # <6 秒素材整条作为一个片段，不切
+    if duration < MAX_CLIP_SECONDS:
+        return [
+            AssetAtomClip.create(
+                asset_id=asset_id,
+                start_time=0.0,
+                end_time=_round3(duration),
+                clip_index=0,
+                tags=list(tags or []),
+            )
+        ]
+
+    boundaries: list[float] = [0.0]
+    scene_hits: dict[int, float] = {}
+
+    cursor = 0.0
+    while duration - cursor > MAX_CLIP_SECONDS + _EPS:
+        # 在 [3, 6] 内随机决定本段目标时长
+        target_len = r.uniform(MIN_CLIP_SECONDS, MAX_CLIP_SECONDS)
+        raw_cut = cursor + target_len
+        if raw_cut >= duration - _EPS:
+            break
+        cut, hit = _snap_to_scene(raw_cut, points, lower=cursor, upper=duration)
+
+        # 对齐后若导致本段短于 3 秒（切换点太靠近段首），放弃对齐
+        if cut - cursor < MIN_CLIP_SECONDS - _EPS:
+            cut = _round3(raw_cut)
+            hit = None
+
+        boundaries.append(_round3(cut))
+        if hit is not None:
+            scene_hits[len(boundaries) - 1] = hit
+        cursor = cut
+
+    boundaries.append(_round3(duration))
+
+    # 末段处理：最后一个片段不足 3 秒则合并到前一个
+    if len(boundaries) >= 3:
+        tail_start = boundaries[-2]
+        tail_len = duration - tail_start
+        if tail_len < MIN_TAIL_SECONDS - _EPS:
+            boundaries.pop(-2)
+
+    clips: list[AssetAtomClip] = []
+    for index in range(len(boundaries) - 1):
+        start = boundaries[index]
+        end = boundaries[index + 1]
+        if end - start < _EPS:
+            continue
+        # 片段尾部对齐的切换点 = 该片段右边界（若它来自 snap）
+        scene_at = scene_hits.get(index + 1)
+        clips.append(
+            AssetAtomClip.create(
+                asset_id=asset_id,
+                start_time=start,
+                end_time=end,
+                clip_index=index,
+                tags=list(tags or []),
+                scene_change_at=scene_at,
+            )
+        )
+    return clips
+
+
+def compute_fallback_clips(
+    asset_id: str,
+    duration: float,
+    *,
+    tags: list[str] | None = None,
+    clip_seconds: float = 4.5,
+) -> list[AssetAtomClip]:
+    """兜底切片：atom_clips 未就绪时，内存中按固定步长临时均匀切片（不存库）.
+
+    与 :func:`compute_atom_clips` 的区别：不随机、不对齐切点，
+    产出的片段标记 ``is_fallback=True``。
+    """
+    if duration <= 0:
+        return []
+
+    step = min(max(clip_seconds, MIN_CLIP_SECONDS), MAX_CLIP_SECONDS)
+    clips: list[AssetAtomClip] = []
+    cursor = 0.0
+    index = 0
+    while cursor < duration - _EPS:
+        end = min(cursor + step, duration)
+        clips.append(
+            AssetAtomClip.create(
+                asset_id=asset_id,
+                start_time=_round3(cursor),
+                end_time=_round3(end),
+                clip_index=index,
+                tags=list(tags or []),
+                is_fallback=True,
+            )
+        )
+        cursor = end
+        index += 1
+
+    # 末段不足 3 秒合并
+    if len(clips) >= 2 and clips[-1].duration < MIN_TAIL_SECONDS - _EPS:
+        last = clips.pop()
+        prev = clips[-1]
+        merged = AssetAtomClip.create(
+            asset_id=asset_id,
+            start_time=prev.start_time,
+            end_time=last.end_time,
+            clip_index=prev.clip_index,
+            tags=list(tags or []),
+            is_fallback=True,
+        )
+        clips[-1] = merged
+    return clips
+
+
+def _normalize_scene_points(points: list[float] | None, duration: float) -> list[float]:
+    """清洗切换点：去重、排序、限定在 (0, duration) 内。"""
+    if not points:
+        return []
+    cleaned = sorted({round(float(p), 3) for p in points if 0 < float(p) < duration})
+    return cleaned

packages/domain/atom_clip_tagger.py

@@ -0,0 +1,292 @@
+"""片段级 AI 标签 — #1970 智能剪辑流程重构 P2.
+
+对每个 atom_clip 提取关键帧，调用豆包视觉理解 API 识别内容，
+生成结构化标签（场景、物体、动作、景别、是否有文字）。
+
+纯函数 + IO 分离设计：
+- build_vision_prompt() 返回结构化 prompt
+- parse_vision_response(text) 解析 AI 返回的 JSON 标签
+- tag_atom_clip(...) 主入口，组合帧提取 → 视觉 API → 解析标签
+
+降级策略：任何环节失败都返回 {"inherited_tags": clip.tags}，不阻断流程。
+"""
+
+from __future__ import annotations
+
+import json
+import logging
+import subprocess
+import tempfile
+from pathlib import Path
+from typing import Any, Optional
+
+logger = logging.getLogger(__name__)
+
+# AI 标签结构的键
+AI_TAG_KEYS = ("scene", "objects", "action", "shot", "has_text")
+
+
+def build_vision_prompt() -> str:
+    """返回结构化标签提取 prompt.
+
+    要求 AI 以 JSON 格式返回片段内容标签，包含：
+    - scene: 场景类型列表（如 "工厂", "办公室", "户外"）
+    - objects: 出现的物体列表（如 "产品", "手机", "电脑"）
+    - action: 动作类型列表（如 "演示", "说话", "操作"）
+    - shot: 景别（"特写" / "中景" / "远景" 之一）
+    - has_text: 画面中是否有显著文字（true/false）
+    """
+    return """请分析这段视频片段的关键帧，识别内容并返回 JSON 格式标签。
+
+要求返回以下 JSON 结构（严格 JSON，不要添加其他文字）：
+{
+  "scene": ["场景1", "场景2"],
+  "objects": ["物体1", "物体2"],
+  "action": ["动作1"],
+  "shot": "特写|中景|远景",
+  "has_text": true/false
+}
+
+规则：
+- scene: 场景类型，如"工厂"、"办公室"、"户外"、"商店"、"家庭"等，1-3个
+- objects: 画面中可见的主要物体，如"产品"、"手机"、"电脑"、"食品"等，1-5个
+- action: 人物或物体正在进行的动作，如"演示"、"说话"、"操作"、"展示"等，1-3个
+- shot: 景别判断，只能是"特写"、"中景"或"远景"之一
+- has_text: 画面中是否有显著可读文字（标题、字幕、标语等）
+
+请只返回 JSON，不要有其他说明文字。"""
+
+
+def parse_vision_response(text: str) -> dict:
+    """解析 AI 返回的 JSON 标签文本.
+
+    Args:
+        text: 视觉 API 返回的文本，期望是 JSON 格式。
+
+    Returns:
+        结构化标签 dict，格式如：
+        {"scene": [...], "objects": [...], "action": [...], "shot": "...", "has_text": bool}
+
+    解析失败时返回空 dict。
+    """
+    if not text or not text.strip():
+        return {}
+
+    # 尝试直接解析
+    cleaned = text.strip()
+
+    # 去除可能的 markdown 代码块包裹
+    if cleaned.startswith("```"):
+        lines = cleaned.split("\n")
+        # 去掉首尾的 ``` 行
+        start = 1
+        end = len(lines)
+        for i in range(len(lines) - 1, 0, -1):
+            if lines[i].strip().startswith("```"):
+                end = i
+                break
+        cleaned = "\n".join(lines[start:end]).strip()
+
+    try:
+        data = json.loads(cleaned)
+    except json.JSONDecodeError:
+        # 尝试从文本中提取 JSON 块
+        try:
+            start_idx = cleaned.index("{")
+            end_idx = cleaned.rindex("}") + 1
+            data = json.loads(cleaned[start_idx:end_idx])
+        except (ValueError, json.JSONDecodeError):
+            logger.warning("无法解析 AI 标签响应: %s", text[:200])
+            return {}
+
+    if not isinstance(data, dict):
+        return {}
+
+    # 验证和清洗各字段
+    result: dict[str, Any] = {}
+    for key in ("scene", "objects", "action"):
+        val = data.get(key)
+        if isinstance(val, list):
+            result[key] = [str(v).strip() for v in val if str(v).strip()]
+        elif isinstance(val, str) and val.strip():
+            result[key] = [val.strip()]
+        else:
+            result[key] = []
+
+    shot_val = data.get("shot", "")
+    if isinstance(shot_val, str) and shot_val.strip() in ("特写", "中景", "远景"):
+        result["shot"] = shot_val.strip()
+    else:
+        result["shot"] = ""
+
+    has_text_val = data.get("has_text")
+    if isinstance(has_text_val, bool):
+        result["has_text"] = has_text_val
+    elif isinstance(has_text_val, str):
+        result["has_text"] = has_text_val.lower() in ("true", "yes", "1")
+    else:
+        result["has_text"] = False
+
+    return result
+
+
+def _extract_frames_via_mediakit(
+    mediakit_client: Any,
+    video_url: str,
+    start_time: float,
+    end_time: float,
+) -> Optional[list[str]]:
+    """通过 MediaKit 提取 3 帧（首、中、尾）.
+
+    Returns:
+        图片 URL 列表（3 个），失败返回 None。
+    """
+    try:
+        frames = mediakit_client.extract_frames(
+            video_url=video_url,
+            strategy="SpecifiedTime",
+            max_frames=3,
+            poll_interval=2.0,
+            max_poll_attempts=30,
+        )
+        # MediaKit SpecifiedTime 策略可能不支持直接传时间点
+        # 如果返回结果不够 3 帧，降级到 ffmpeg
+        if frames and len(frames) >= 1:
+            urls = [f.get("image_url", "") for f in frames if f.get("image_url")]
+            if urls:
+                return urls
+    except Exception as e:
+        logger.warning("MediaKit 抽帧失败，将降级为 ffmpeg: %s", e)
+
+    return None
+
+
+def _extract_frames_via_ffmpeg(
+    video_url: str,
+    start_time: float,
+    end_time: float,
+) -> Optional[list[str]]:
+    """通过 ffmpeg 本地提取 3 帧并转为 base64.
+
+    Returns:
+        base64 data URI 列表（3 个），失败返回 None。
+    """
+    import base64
+
+    mid_time = round((start_time + end_time) / 2, 3)
+    timestamps = [round(start_time, 3), mid_time, round(end_time, 3)]
+
+    try:
+        frames_b64: list[str] = []
+        with tempfile.TemporaryDirectory() as tmpdir:
+            for i, ts in enumerate(timestamps):
+                out_path = Path(tmpdir) / f"frame_{i}.jpg"
+                cmd = [
+                    "ffmpeg",
+                    "-y",
+                    "-ss",
+                    str(ts),
+                    "-i",
+                    video_url,
+                    "-vframes",
+                    "1",
+                    "-q:v",
+                    "2",
+                    str(out_path),
+                ]
+                result = subprocess.run(
+                    cmd,
+                    capture_output=True,
+                    timeout=30,
+                )
+                if result.returncode != 0 or not out_path.exists():
+                    logger.warning("ffmpeg 抽帧失败 ts=%s: %s", ts, result.stderr[:200])
+                    continue
+
+                img_data = out_path.read_bytes()
+                b64 = base64.b64encode(img_data).decode("ascii")
+                frames_b64.append(f"data:image/jpeg;base64,{b64}")
+
+        if frames_b64:
+            return frames_b64
+    except Exception as e:
+        logger.warning("ffmpeg 抽帧异常: %s", e)
+
+    return None
+
+
+def tag_atom_clip(
+    clip: Any,
+    video_url: str,
+    doubao_client: Any,
+    mediakit_client: Any | None = None,
+    storage: Any | None = None,
+) -> dict:
+    """主入口：为单个 atom_clip 生成 AI 标签.
+
+    流程：提取帧 → 调视觉 API → 解析标签 → 返回结构化标签 dict。
+    任何环节失败返回 {"inherited_tags": clip.tags}，不阻断流程。
+
+    Args:
+        clip: AssetAtomClip 领域对象（需有 start_time, end_time, tags）。
+        video_url: 素材视频的公网可访问 URL。
+        doubao_client: DoubaoClient 实例。
+        mediakit_client: MediaKitClient 实例（可选，不可用时降级 ffmpeg）。
+        storage: SharedStorageService 实例（可选，用于获取签名 URL）。
+
+    Returns:
+        结构化标签 dict，格式如：
+        {"scene": [...], "objects": [...], "action": [...], "shot": "...",
+         "has_text": bool, "inherited_tags": [...]}
+    """
+    inherited = list(getattr(clip, "tags", []) or [])
+
+    # 检查 DoubaoClient 是否可用
+    if not getattr(doubao_client, "is_available", False):
+        logger.info("DoubaoClient 不可用，跳过 AI 标签: clip_id=%s", getattr(clip, "id", ""))
+        return {"inherited_tags": inherited}
+
+    # 提取帧图片
+    frame_urls: Optional[list[str]] = None
+    start_time = getattr(clip, "start_time", 0.0)
+    end_time = getattr(clip, "end_time", 0.0)
+
+    # 优先使用 MediaKit
+    if mediakit_client and getattr(mediakit_client, "is_available", False):
+        frame_urls = _extract_frames_via_mediakit(mediakit_client, video_url, start_time, end_time)
+
+    # MediaKit 不可用或失败 → 降级 ffmpeg
+    if not frame_urls:
+        frame_urls = _extract_frames_via_ffmpeg(video_url, start_time, end_time)
+
+    if not frame_urls:
+        logger.warning("帧提取失败，跳过 AI 标签: clip_id=%s", getattr(clip, "id", ""))
+        return {"inherited_tags": inherited}
+
+    # 调用视觉 API
+    prompt = build_vision_prompt()
+    messages = [{"role": "user", "content": prompt}]
+
+    try:
+        response_text = doubao_client.vision_completion(
+            messages=messages,
+            images=frame_urls,
+            timeout=60,
+        )
+    except Exception as e:
+        logger.warning("视觉 API 调用异常: clip_id=%s error=%s", getattr(clip, "id", ""), e)
+        return {"inherited_tags": inherited}
+
+    if not response_text:
+        logger.warning("视觉 API 返回空: clip_id=%s", getattr(clip, "id", ""))
+        return {"inherited_tags": inherited}
+
+    # 解析标签
+    ai_tags = parse_vision_response(response_text)
+    if not ai_tags:
+        logger.warning("标签解析失败: clip_id=%s response=%s", getattr(clip, "id", ""), response_text[:200])
+        return {"inherited_tags": inherited}
+
+    # 合并 inherited_tags
+    ai_tags["inherited_tags"] = inherited
+    return ai_tags

packages/domain/edit_plan_clip.py

@@ -65,6 +65,7 @@ class EditPlanClip:
     order: int
     template_clip_config_id: str = ""
     asset_id: str = ""
+    atom_clip_id: str = ""
     text_content: str = ""
     start_time: float = 0.0
     duration: float = 0.0
@@ -85,6 +86,7 @@ class EditPlanClip:
         *,
         template_clip_config_id: str = "",
         asset_id: str = "",
+        atom_clip_id: str = "",
         text_content: str = "",
         start_time: float = 0.0,
         duration: float = 0.0,
@@ -117,6 +119,7 @@ class EditPlanClip:
             order=order,
             template_clip_config_id=template_clip_config_id.strip() if template_clip_config_id else "",
             asset_id=asset_id.strip() if asset_id else "",
+            atom_clip_id=atom_clip_id.strip() if atom_clip_id else "",
             text_content=text_content.strip(),
             start_time=start_time,
             duration=duration,
@@ -127,16 +130,25 @@ class EditPlanClip:
             config=config or {},
         )
 
-    def assign_asset(self, asset_id: str, *, start_time: float | None = None) -> None:
+    def assign_asset(
+        self,
+        asset_id: str,
+        *,
+        start_time: float | None = None,
+        atom_clip_id: str | None = None,
+    ) -> None:
         """分配素材
 
         Args:
             asset_id: 素材 ID
             start_time: 可选，素材播放起始时间（秒）。如果提供且在有效范围内，则设置；否则保持默认 0.0
+            atom_clip_id: 可选，选中的原子片段 ID（#1970 原子化切片）。
         """
         if not asset_id.strip():
             raise ValueError("asset_id 不能为空")
         self.asset_id = asset_id.strip()
+        if atom_clip_id is not None:
+            self.atom_clip_id = atom_clip_id.strip() if atom_clip_id else ""
         if start_time is not None and start_time >= 0:
             self.start_time = start_time
         self.updated_at = datetime.now(UTC)

packages/domain/editing_mode.py

@@ -12,9 +12,21 @@ else:
 
 
 class EditingMode(StrEnum):
-    """剪辑模式枚举"""
+    """剪辑模式枚举。
 
-    ONE_TAKE = "one_take"  # 顺序拼接模式
-    PIP = "pip"  # 画中画模式
-    VOICE_OVER = "voice_over"  # 口播+B-roll模式
-    VOICE_PIP = "voice_pip"  # 口播+画中画组合模式
+    #1970 智能剪辑流程重构（2026-09）后，剪辑组装模式改由
+    ``CreateGenerationTaskRequest.assembly_mode``（'random'/'narrative'）表达。
+    本枚举仅保留模板体系仍在使用的模式；以下三个模式标记 deprecated，
+    不主动删除代码（pip/voice_pip 在路由入口已统一映射为 one_take），
+    待确认无存量引用后在技术债清理中移除：
+
+    - ONE_TAKE（deprecated）：顺序拼接，等同 assembly_mode='random'
+    - PIP（deprecated）：画中画已下线，入口映射 one_take
+    - VOICE_PIP（deprecated）：口播+画中画已下线，入口映射 one_take
+    - VOICE_OVER：保留，口播+B-roll 模板仍在使用
+    """
+
+    ONE_TAKE = "one_take"  # deprecated（#1970）：顺序拼接，等同 assembly_mode='random'
+    PIP = "pip"  # deprecated（#1970）：画中画已下线，入口映射 one_take
+    VOICE_OVER = "voice_over"  # 口播+B-roll模式（保留）
+    VOICE_PIP = "voice_pip"  # deprecated（#1970）：口播+画中画已下线，入口映射 one_take

packages/domain/narrative_match.py

@@ -0,0 +1,260 @@
+"""叙事剪辑素材标签匹配 — #1970 PR3 + P2 AI 标签加权.
+
+叙事模式下，选片在现有评分（smart_match / atom_clip_selector）之前先做一层
+文案标签匹配：
+
+- 文案 tags 与素材 tag 名归一化后求交集；
+- 命中任一标签的素材作为「优先候选池」，未命中的作为普通池；
+- 调用方对优先池跑现有 smart_select_assets，数量不足时用普通池补足
+  （无任何匹配 → 完全降级为现有随机逻辑，行为与改造前一致）。
+
+P2 AI 标签加权（#1970 fragment-level AI tagging）：
+- 片段级 AI 标签（scene/objects/action）与文案标签做交集时权重 2.0
+- 素材级标签（tag_ids 映射名）与文案标签交集时权重 1.0
+- 综合得分 = sum(命中权重) / max(可能权重)
+- 有 AI 标签的片段命中时优先于仅素材标签命中的片段
+
+纯函数模块：标签 id→名称映射由调用方查 TagModel 后注入，不直接碰 DB。
+"""
+
+from __future__ import annotations
+
+from typing import Any, Iterable
+
+# 标签归一化后仍短于此长度的标签不参与匹配（避免「的」「是」这类噪声短词）
+MIN_TAG_LEN = 2
+
+# 标签匹配权重
+AI_TAG_WEIGHT = 2.0  # AI 标签命中权重
+ASSET_TAG_WEIGHT = 1.0  # 素材标签命中权重
+
+
+def normalize_tag(tag: Any) -> str:
+    """标签归一化：去空白、小写。数字/英文统一小写，中文不受影响。"""
+    if tag is None:
+        return ""
+    return str(tag).strip().lower()
+
+
+def _normalize_tags(tags: Iterable[Any]) -> set[str]:
+    out: set[str] = set()
+    for t in tags or []:
+        norm = normalize_tag(t)
+        if len(norm) >= MIN_TAG_LEN:
+            out.add(norm)
+    return out
+
+
+def build_asset_tag_name_index(tag_names_by_id: dict[str, Any]) -> dict[str, set[str]]:
+    """构造 asset_id → 归一化标签名集合 的索引。
+
+    Args:
+        tag_names_by_id: {asset_id: [标签名或标签id, ...]}，允许混入 None/空值
+    """
+    index: dict[str, set[str]] = {}
+    for asset_id, names in (tag_names_by_id or {}).items():
+        index[asset_id] = _normalize_tags(names)
+    return index
+
+
+def _extract_ai_tag_names(ai_tags: dict) -> set[str]:
+    """从 AI 标签 dict 中提取所有标签名（scene + objects + action）.
+
+    Args:
+        ai_tags: 片段级 AI 标签 dict，如 {"scene": [...], "objects": [...], "action": [...], ...}
+
+    Returns:
+        归一化后的标签名集合。
+    """
+    names: set[str] = set()
+    for key in ("scene", "objects", "action"):
+        values = ai_tags.get(key)
+        if isinstance(values, list):
+            names |= _normalize_tags(values)
+    return names
+
+
+def _compute_ai_score(
+    asset_id: str,
+    wanted: set[str],
+    clip_ai_tags_by_asset: dict[str, list[dict]] | None,
+) -> float:
+    """计算单个素材的 AI 标签加权得分.
+
+    对该素材的所有片段 AI 标签，求各片段标签名与文案标签交集的加权总和。
+    每个片段的命中权重 = 命中数 × AI_TAG_WEIGHT。
+    最终取所有片段的最高得分（而非累加，避免片段数多的素材不公平占优）。
+
+    Args:
+        asset_id: 素材 ID。
+        wanted: 归一化后的文案标签集合。
+        clip_ai_tags_by_asset: {asset_id: [ai_tag_dict, ...]} 每个片段一个。
+
+    Returns:
+        AI 标签加权得分（≥0）。
+    """
+    if not clip_ai_tags_by_asset or not wanted:
+        return 0.0
+
+    clips = clip_ai_tags_by_asset.get(asset_id)
+    if not clips:
+        return 0.0
+
+    best_score = 0.0
+    for ai_tags in clips:
+        if not ai_tags or not isinstance(ai_tags, dict):
+            continue
+        ai_names = _extract_ai_tag_names(ai_tags)
+        hits = ai_names & wanted
+        score = len(hits) * AI_TAG_WEIGHT
+        if score > best_score:
+            best_score = score
+
+    return best_score
+
+
+def match_assets_by_script_tags(
+    assets: list[Any],
+    *,
+    script_tags: Iterable[Any],
+    tag_names_by_id: dict[str, Any] | None = None,
+    clip_ai_tags_by_asset: dict[str, list[dict]] | None = None,
+) -> tuple[list[Any], list[Any]]:
+    """按文案标签把素材拆成「命中池 / 未命中池」，保持输入相对顺序。
+
+    P2 加权逻辑：
+    - AI 标签命中（scene/objects/action ∩ 文案标签）权重 2.0
+    - 素材标签命中（tag_ids 映射名 ∩ 文案标签）权重 1.0
+    - 任一权重 > 0 → 命中池，否则 → 未命中池
+
+    Args:
+        assets: 候选素材（domain Asset，需有 id 与 tag_ids）。
+        script_tags: 文案 tags（字符串数组，名称语义）。
+        tag_names_by_id: asset_id → 素材标签名列表。
+        clip_ai_tags_by_asset: #1970 P2 — {asset_id: [ai_tag_dict, ...]}。
+
+    Returns:
+        (matched, unmatched)：命中任一文案标签的素材 / 其余素材。
+        文案无有效标签时 matched 为空（调用方直接走随机逻辑）。
+    """
+    wanted = _normalize_tags(script_tags)
+    if not wanted:
+        return [], list(assets)
+
+    name_index = build_asset_tag_name_index(tag_names_by_id or {})
+    matched: list[Any] = []
+    unmatched: list[Any] = []
+    for asset in assets:
+        asset_id = str(getattr(asset, "id", "") or "")
+
+        # P2: AI 标签加权得分
+        ai_score = _compute_ai_score(asset_id, wanted, clip_ai_tags_by_asset)
+
+        # 素材标签得分
+        names = set(name_index.get(asset_id, set()))
+        raw_tags = getattr(asset, "tags", None)
+        if raw_tags:
+            names |= _normalize_tags(raw_tags)
+        asset_score = len(names & wanted) * ASSET_TAG_WEIGHT
+
+        # 综合得分 > 0 → 命中池
+        if ai_score > 0 or asset_score > 0:
+            matched.append(asset)
+        else:
+            unmatched.append(asset)
+    return matched, unmatched
+
+
+def compute_tag_match_score(
+    asset_id: str,
+    *,
+    script_tags: Iterable[Any],
+    tag_names_by_id: dict[str, Any] | None = None,
+    clip_ai_tags_by_asset: dict[str, list[dict]] | None = None,
+) -> float:
+    """计算单个素材的标签匹配综合得分（0.0 ~ 1.0）.
+
+    综合得分 = sum(命中权重) / max(可能权重)
+    - AI 标签每命中一个 +2.0
+    - 素材标签每命中一个 +1.0
+    - max_possible = len(wanted) * (AI_TAG_WEIGHT + ASSET_TAG_WEIGHT)
+
+    Args:
+        asset_id: 素材 ID。
+        script_tags: 文案标签。
+        tag_names_by_id: 素材标签名索引。
+        clip_ai_tags_by_asset: AI 标签索引。
+
+    Returns:
+        归一化得分 0.0~1.0。
+    """
+    wanted = _normalize_tags(script_tags)
+    if not wanted:
+        return 0.0
+
+    # AI 得分
+    ai_score = _compute_ai_score(asset_id, wanted, clip_ai_tags_by_asset)
+
+    # 素材标签得分
+    name_index = build_asset_tag_name_index(tag_names_by_id or {})
+    names = name_index.get(asset_id, set())
+    asset_score = len(names & wanted) * ASSET_TAG_WEIGHT
+
+    # 归一化：最大可能得分 = 文案标签数 × (AI权重 + 素材权重)
+    max_possible = len(wanted) * (AI_TAG_WEIGHT + ASSET_TAG_WEIGHT)
+    if max_possible <= 0:
+        return 0.0
+
+    return min((ai_score + asset_score) / max_possible, 1.0)
+
+
+def pick_narrative_assets(
+    assets: list[Any],
+    *,
+    script_tags: Iterable[Any],
+    tag_names_by_id: dict[str, Any] | None = None,
+    clip_ai_tags_by_asset: dict[str, list[dict]] | None = None,
+    limit: int | None = None,
+    rng: Any = None,
+) -> list[Any]:
+    """叙事模式选片：标签命中池优先，不足部分从未命中池按现有评分补齐。
+
+    本函数只负责「标签优先 + 兜底降级」的顺序编排；评分仍复用
+    smart_match.smart_select_assets（质量/时长/新鲜度/未使用 + 随机噪声），
+    不重写评分维度。
+
+    P2 增强：有 AI 标签的片段命中时权重更高（2.0 vs 1.0），
+    命中池内部按综合标签得分排序（AI 标签命中多的排前面）。
+
+    Args:
+        assets: ready 视频素材候选（调用方负责状态/类型过滤）。
+        script_tags / tag_names_by_id: 见 match_assets_by_script_tags。
+        clip_ai_tags_by_asset: #1970 P2 — {asset_id: [ai_tag_dict, ...]}。
+        limit: 需要的素材数量；None 表示全部（命中池 + 全部未命中池）。
+        rng: 注入 smart_select_assets 的随机源（可复现）。
+
+    Returns:
+        选中的素材列表。无任何标签命中时等价于对全量跑 smart_select_assets。
+    """
+    from packages.domain.smart_match import smart_select_assets
+
+    matched, unmatched = match_assets_by_script_tags(
+        assets,
+        script_tags=script_tags,
+        tag_names_by_id=tag_names_by_id,
+        clip_ai_tags_by_asset=clip_ai_tags_by_asset,
+    )
+
+    need = limit if (limit is not None and limit > 0) else None
+
+    if not matched:
+        # 完全降级：与改造前随机混剪同一逻辑
+        return [r.asset for r in smart_select_assets(assets, kind="video", limit=need, rng=rng)]
+
+    picked = [r.asset for r in smart_select_assets(matched, kind="video", limit=need, rng=rng)]
+    if need is not None and len(picked) < need and unmatched:
+        rest_need = need - len(picked)
+        picked.extend(r.asset for r in smart_select_assets(unmatched, kind="video", limit=rest_need, rng=rng))
+    elif need is None:
+        picked.extend(r.asset for r in smart_select_assets(unmatched, kind="video", rng=rng))
+    return picked

packages/ports/asset_atom_clip_repository.py

@@ -0,0 +1,57 @@
+"""素材原子片段仓储接口定义。"""
+
+from abc import ABC, abstractmethod
+
+from packages.domain.asset_atom_clip import AssetAtomClip
+
+
+class AssetAtomClipRepository(ABC):
+    @abstractmethod
+    def create(self, clip: AssetAtomClip) -> AssetAtomClip:
+        """创建一条原子片段记录。"""
+        pass
+
+    @abstractmethod
+    def batch_create(self, clips: list[AssetAtomClip]) -> list[AssetAtomClip]:
+        """批量创建原子片段记录。"""
+        pass
+
+    @abstractmethod
+    def find_by_asset(self, asset_id: str) -> list[AssetAtomClip]:
+        """查找某个素材的所有原子片段，按 clip_index 排序。"""
+        pass
+
+    @abstractmethod
+    def find_by_id(self, clip_id: str) -> AssetAtomClip | None:
+        """按 ID 查找单个原子片段。"""
+        pass
+
+    @abstractmethod
+    def find_by_ids(self, clip_ids: list[str]) -> list[AssetAtomClip]:
+        """批量查找原子片段。"""
+        pass
+
+    @abstractmethod
+    def delete_by_asset(self, asset_id: str) -> int:
+        """删除某素材的所有原子片段（级联删除），返回删除数量。"""
+        pass
+
+    @abstractmethod
+    def count_by_asset(self, asset_id: str) -> int:
+        """统计某素材的原子片段数量。"""
+        pass
+
+    @abstractmethod
+    def find_candidates_for_selection(
+        self,
+        asset_ids: list[str],
+        *,
+        min_duration: float | None = None,
+        max_duration: float | None = None,
+        limit: int = 100,
+    ) -> list[AssetAtomClip]:
+        """按素材集合和时长条件查找候选原子片段，按 clip_index 排序。
+
+        选片逻辑一次拉取多条素材的候选片段时使用，避免 N+1 查询。
+        """
+        pass

packages/shared/ai_client.py

@@ -37,6 +37,7 @@ class DoubaoClient:
         self.base_url: str = settings.doubao_base_url.rstrip("/")
         self.timeout: int = settings.doubao_timeout
         self.max_retries: int = settings.doubao_max_retries
+        self.vision_model: str = settings.doubao_vision_model
 
     @property
     def is_available(self) -> bool:
@@ -103,6 +104,99 @@ class DoubaoClient:
         logger.error("豆包API调用最终失败: %s", last_error)
         return None
 
+    def vision_completion(
+        self,
+        messages: list[dict],
+        images: list[str] | None = None,
+        max_tokens: int = 2048,
+        temperature: float = 0.3,
+        timeout: int | None = None,
+    ) -> Optional[str]:
+        """调用豆包视觉理解 API（OpenAI 兼容多模态格式）.
+
+        将 images 附加到最后一条 user message 的 content 中，
+        使用 vision_model（默认 doubao-1-5-vision-pro-250915）。
+
+        Args:
+            messages: 对话消息列表。最后一条 user message 会被注入图片内容。
+            images: 图片列表，支持 base64 data URI 或 HTTP(S) URL。
+            max_tokens: 最大生成 token 数，默认 2048。
+            temperature: 采样温度，默认 0.3（视觉任务偏低更稳定）。
+            timeout: 单次请求超时秒数，不传则使用默认 self.timeout。
+
+        Returns:
+            模型返回的文本内容，失败返回 None。
+        """
+        if not self.is_available:
+            return None
+
+        # 构造多模态 content：先追加文本，再追加图片
+        vision_messages = []
+        for msg in messages:
+            vision_messages.append(dict(msg))
+
+        # 将图片注入最后一条 user message
+        if images and vision_messages:
+            # 找到最后一条 user message
+            for i in range(len(vision_messages) - 1, -1, -1):
+                if vision_messages[i].get("role") == "user":
+                    text_content = vision_messages[i].get("content", "")
+                    multi_content: list[dict[str, Any]] = []
+                    if text_content:
+                        multi_content.append({"type": "text", "text": text_content})
+                    for img in images:
+                        if img.startswith("data:") or img.startswith("http://") or img.startswith("https://"):
+                            multi_content.append({"type": "image_url", "image_url": {"url": img}})
+                        else:
+                            # 当作 base64 编码
+                            multi_content.append(
+                                {"type": "image_url", "image_url": {"url": f"data:image/jpeg;base64,{img}"}}
+                            )
+                    vision_messages[i]["content"] = multi_content
+                    break
+
+        url = f"{self.base_url}/chat/completions"
+        headers = {
+            "Authorization": f"Bearer {self.api_key}",
+            "Content-Type": "application/json",
+        }
+        payload: dict[str, Any] = {
+            "model": self.vision_model,
+            "messages": vision_messages,
+            "temperature": temperature,
+            "max_tokens": max_tokens,
+        }
+
+        req_timeout = timeout or self.timeout
+        last_error: Optional[Exception] = None
+        for attempt in range(self.max_retries + 1):
+            try:
+                response = httpx.post(
+                    url,
+                    headers=headers,
+                    json=payload,
+                    timeout=req_timeout,
+                )
+                response.raise_for_status()
+                data = response.json()
+                content = data["choices"][0]["message"]["content"]
+                return content.strip()
+            except Exception as e:
+                last_error = e
+                if attempt < self.max_retries:
+                    wait = 0.5 * (2**attempt)
+                    logger.warning(
+                        "豆包视觉API调用失败，%.1fs后重试 (第%d/%d次): %s",
+                        wait,
+                        attempt + 1,
+                        self.max_retries + 1,
+                        e,
+                    )
+                    time.sleep(wait)
+
+        logger.error("豆包视觉API调用最终失败: %s", last_error)
+        return None
+
 
 # ── 单例 ─────────────────────────────────────────────────────────────────────
 

packages/shared/storage.py

@@ -339,6 +339,44 @@ class SharedStorageService(StoragePort):
 
     # ── 浏览器直传 POST ────────────────────────────────────────────────
 
+    def get_upload_url(
+        self,
+        storage_key_or_url: str,
+        expires_seconds: int = 3600,
+        content_type: str = "video/mp4",
+    ) -> str:
+        """获取预签名 PUT 上传 URL（供外部 Worker 上传结果文件）。
+
+        bucket未配置时降级为 public_url（本地/开发环境）；
+        本地产物 key 原样返回。
+        """
+        if self.bucket is None:
+            if self._is_local_generated_url(storage_key_or_url):
+                return storage_key_or_url
+            logger.warning(
+                "get_upload_url: OSS bucket not configured, returning raw URL. key=%s",
+                storage_key_or_url[:200],
+            )
+            return self.get_url(self.normalize_storage_key(storage_key_or_url))
+
+        storage_key = self.normalize_storage_key(storage_key_or_url)
+        try:
+            # oss2 sign_url 支持 'PUT'，需指定 headers 才能限定 Content-Type
+            headers = {"Content-Type": content_type} if content_type else None
+            signed = self.bucket.sign_url("PUT", storage_key, expires_seconds, headers=headers)
+            logger.info(
+                "get_upload_url: signed PUT URL generated. key=%s url_prefix=%s",
+                storage_key[:80],
+                signed[:60],
+            )
+            return signed
+        except Exception:
+            logger.exception(
+                "get_upload_url: sign_url failed, falling back to raw URL. key=%s",
+                storage_key[:200],
+            )
+            return self.get_url(storage_key)
+
     def create_direct_upload_post(
         self,
         storage_key: str,

scripts/render_env.sh

@@ -57,7 +57,7 @@ if [ "$TARGET_ENV" = "staging" ]; then
 fi
 
 # 共用 secrets 直接导出（如果存在）
-SHARED_SECRETS="OSS_ACCESS_KEY_ID OSS_ACCESS_KEY_SECRET COSYVOICE_API_KEY DASHSCOPE_API_KEY MEDIAKIT_API_KEY DOUBAO_API_KEY DOUBAO_MODEL DOUBAO_BASE_URL WECHAT_APP_ID WECHAT_APP_SECRET TIKHUB_API_KEY APIZERO_API_KEY"
+SHARED_SECRETS="OSS_ACCESS_KEY_ID OSS_ACCESS_KEY_SECRET COSYVOICE_API_KEY DASHSCOPE_API_KEY MEDIAKIT_API_KEY DOUBAO_API_KEY DOUBAO_MODEL DOUBAO_BASE_URL DOUBAO_VISION_MODEL WECHAT_APP_ID WECHAT_APP_SECRET TIKHUB_API_KEY APIZERO_API_KEY GPU_WORKER_TOKEN"
 for var in $SHARED_SECRETS; do
   value="${!var:-}"
   # 已经在环境中了，无需额外操作

tests/unit/test_1970_assembly_schema.py

@@ -0,0 +1,218 @@
+"""#1970 PR3 schema 校验 + 路由辅助函数测试。"""
+
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from types import SimpleNamespace
+from unittest.mock import MagicMock
+
+import pytest
+from app.api.routes import generation_tasks as gt
+from app.schemas.generation_task import CreateGenerationTaskRequest
+from pydantic import ValidationError
+
+# ── schema ─────────────────────────────────────────────────────────────────
+
+
+def _base_payload(**overrides):
+    payload = dict(
+        template_id="tpl1",
+        asset_ids=["a1", "a2"],
+        duration=30,
+        title_text="t",
+        editing_mode="voice_over",
+    )
+    payload.update(overrides)
+    return payload
+
+
+class TestAssemblySchema:
+    def test_defaults(self):
+        req = CreateGenerationTaskRequest(**_base_payload())
+        assert req.assembly_mode == "random"
+        assert req.script_id == ""
+        assert req.tts_voice_id == ""
+        assert req.tts_voice_source == "preset"
+        assert req.video_ratio == ""  # 空串=沿用模板默认（前端新流程显式传 9:16）
+        assert req.dedup_enabled is True
+
+    def test_narrative_accepts_fields(self):
+        req = CreateGenerationTaskRequest(
+            **_base_payload(
+                assembly_mode="narrative",
+                script_id="s1",
+                tts_voice_id="longxiaochun",
+                tts_voice_source="clone",
+                video_ratio="16:9",
+            )
+        )
+        assert req.assembly_mode == "narrative"
+        assert req.script_id == "s1"
+
+    def test_bad_assembly_mode_rejected(self):
+        with pytest.raises(ValidationError):
+            CreateGenerationTaskRequest(**_base_payload(assembly_mode="movie"))
+
+    def test_bad_voice_source_rejected(self):
+        with pytest.raises(ValidationError):
+            CreateGenerationTaskRequest(**_base_payload(tts_voice_source="elevenlabs"))
+
+    def test_bad_video_ratio_rejected(self):
+        with pytest.raises(ValidationError):
+            CreateGenerationTaskRequest(**_base_payload(video_ratio="4:5"))
+
+    def test_narrative_without_script_rejected(self):
+        with pytest.raises(ValidationError) as ei:
+            CreateGenerationTaskRequest(**_base_payload(assembly_mode="narrative"))
+        assert "script_id" in str(ei.value)
+
+    def test_narrative_without_voice_rejected(self):
+        with pytest.raises(ValidationError) as ei:
+            CreateGenerationTaskRequest(**_base_payload(assembly_mode="narrative", script_id="s1"))
+        assert "tts_voice_id" in str(ei.value)
+
+    def test_random_mode_ignores_script_absence(self):
+        req = CreateGenerationTaskRequest(**_base_payload())
+        assert req.assembly_mode == "random"
+
+
+# ── _select_assets_from_library 的叙事分支 ─────────────────────────────────
+
+
+@dataclass
+class _Asset:
+    id: str
+    status: object = field(default_factory=lambda: SimpleNamespace(value="ready"))
+    mime_type: str = "video/mp4"
+    tags: list[str] = field(default_factory=list)
+    tag_ids: list[str] = field(default_factory=list)
+    file_type: str = "video"
+    quality_score: float | None = None
+    duration: float = 8.0
+    created_at: object = None
+    metadata: dict = field(default_factory=dict)
+
+
+class TestNarrativeSelectInRoute:
+    def test_narrative_tags_prioritize_matched(self):
+        assets = [
+            _Asset("a1", tags=["工厂"]),
+            _Asset("a2", tags=["旅游"]),
+            _Asset("a3", tags=["工厂"]),
+        ]
+        picked = gt._select_assets_from_library(assets, mode="all", count=2, script_tags=["工厂"])
+        assert set(picked) == {"a1", "a3"}
+
+    def test_narrative_no_match_falls_back_to_full_pool(self):
+        assets = [_Asset("a1", tags=["工厂"]), _Asset("a2", tags=["旅游"])]
+        picked = gt._select_assets_from_library(assets, mode="all", count=2, script_tags=["美食"])
+        assert set(picked) == {"a1", "a2"}
+
+    def test_tag_ids_via_index(self):
+        assets = [_Asset("a1", tag_ids=["t1"]), _Asset("a2", tag_ids=["t2"])]
+        picked = gt._select_assets_from_library(
+            assets,
+            mode="all",
+            count=1,
+            script_tags=["教程"],
+            tag_names_by_id={"a1": ["教程"], "a2": ["旅游"]},
+        )
+        assert picked == ["a1"]
+
+    def test_no_script_tags_smart_path_unchanged(self):
+        assets = [_Asset("a1"), _Asset("a2")]
+        picked = gt._select_assets_from_library(assets, mode="smart", count=1)
+        assert picked  # 非空即可，评分逻辑由 smart_match 自己的测试覆盖
+
+
+# ── _load_asset_tag_names（DB 替身） ────────────────────────────────────────
+
+
+class _FakeRow:
+    def __init__(self, **kw):
+        self.__dict__.update(kw)
+
+
+class _FakeQuery:
+    def __init__(self, rows):
+        self._rows = rows
+
+    def filter(self, *a, **k):
+        return self
+
+    def all(self):
+        return self._rows
+
+
+class _FakeDb:
+    def __init__(self, name_rows, link_rows):
+        self._maps = {
+            "names": name_rows,
+            "links": link_rows,
+        }
+
+    def query(self, *cols):
+        # _load_asset_tag_names 两次查询：第一次取 (id, name)，第二次取 (asset_id, tag_id)
+        keys = tuple(getattr(c, "key", None) for c in cols)
+        if keys and keys[0] == "id":
+            return _FakeQuery(self._maps["names"])
+        return _FakeQuery(self._maps["links"])
+
+
+@dataclass
+class _TagIdAsset:
+    id: str
+    tag_ids: list[str]
+
+
+class TestLoadAssetTagNames:
+    def test_builds_index(self):
+        assets = [_TagIdAsset("a1", ["t1", "t2"]), _TagIdAsset("a2", ["t2"])]
+        db = _FakeDb(
+            name_rows=[_FakeRow(id="t1", name="工厂"), _FakeRow(id="t2", name="带货")],
+            link_rows=[
+                ("a1", "t1"),
+                ("a1", "t2"),
+                ("a2", "t2"),
+            ],
+        )
+        idx = gt._load_asset_tag_names(db, assets, "u1")
+        assert idx == {"a1": ["工厂", "带货"], "a2": ["带货"]}
+
+    def test_no_tag_ids_returns_empty(self):
+        assert gt._load_asset_tag_names(_FakeDb([], []), [_TagIdAsset("a1", [])], "u1") == {}
+
+    def test_query_failure_degrades_empty(self):
+        class BoomQuery:
+            def filter(self, *a, **k):
+                raise RuntimeError("db down")
+
+        class BoomDb:
+            def query(self, *a):
+                return BoomQuery()
+
+        idx = gt._load_asset_tag_names(BoomDb(), [_TagIdAsset("a1", ["t1"])], "u1")
+        assert idx == {}
+
+
+# ── _resolve_output_dimensions ─────────────────────────────────────────────
+
+
+class TestResolveOutputDimensions:
+    def _req(self, ratio="", width=1280, height=720):
+        return CreateGenerationTaskRequest(**_base_payload(video_ratio=ratio, output_width=width, output_height=height))
+
+    def test_known_ratios(self):
+        assert gt._resolve_output_dimensions(self._req("9:16")) == (1080, 1920)
+        assert gt._resolve_output_dimensions(self._req("16:9")) == (1920, 1080)
+        assert gt._resolve_output_dimensions(self._req("1:1")) == (1080, 1080)
+        assert gt._resolve_output_dimensions(self._req("4:3")) == (1440, 1080)
+        assert gt._resolve_output_dimensions(self._req("3:4")) == (1080, 1440)
+
+    def test_old_call_default_kept_when_no_ratio(self):
+        assert gt._resolve_output_dimensions(self._req("")) == (1280, 720)
+
+    def test_explicit_dimensions_take_precedence(self):
+        # 非旧默认值（720p）的显式分辨率优先于 ratio 映射
+        req = self._req("9:16", width=1440, height=2560)
+        assert gt._resolve_output_dimensions(req) == (1440, 2560)

tests/unit/test_1970_atom_clip_resolver.py

@@ -0,0 +1,110 @@
+"""#1970 原子片段 resolver 单元测试：DB 加载 + 内存兜底."""
+
+from __future__ import annotations
+
+from packages.domain.asset_atom_clip import AssetAtomClip
+from packages.domain.atom_clip_resolver import (
+    flatten_candidates,
+    load_atom_clips_for_assets,
+)
+
+
+def _atom(asset_id: str, idx: int, start: float, end: float) -> AssetAtomClip:
+    return AssetAtomClip(
+        id=f"{asset_id}-clip-{idx}",
+        asset_id=asset_id,
+        start_time=start,
+        end_time=end,
+        duration=round(end - start, 3),
+        clip_index=idx,
+    )
+
+
+class FakeAtomRepo:
+    def __init__(self, by_asset):
+        self._by_asset = by_asset
+
+    def find_candidates_for_selection(self, asset_ids, *, limit=0):
+        out = []
+        for aid in asset_ids:
+            out.extend(self._by_asset.get(aid, []))
+        return out
+
+    def find_by_asset(self, asset_id):
+        return list(self._by_asset.get(asset_id, []))
+
+
+class _Asset:
+    def __init__(self, duration):
+        self.duration = duration
+
+
+class FakeAssetRepo:
+    def __init__(self, durations):
+        self._durations = durations
+
+    def get(self, asset_id):
+        d = self._durations.get(asset_id)
+        return _Asset(d) if d is not None else None
+
+
+class TestLoadAtomClips:
+    def test_persisted_clips_loaded_sorted(self):
+        clips = [_atom("a", 1, 4.5, 9.0), _atom("a", 0, 0.0, 4.5)]
+        repo = FakeAtomRepo({"a": clips})
+        result = load_atom_clips_for_assets(["a"], atom_clip_repo=repo)
+        assert [c.clip_index for c in result["a"]] == [0, 1]
+
+    def test_dedup_asset_ids_preserves_order(self):
+        repo = FakeAtomRepo({"a": [_atom("a", 0, 0, 4)], "b": [_atom("b", 0, 0, 4)]})
+        result = load_atom_clips_for_assets(["a", "b", "a"], atom_clip_repo=repo)
+        assert list(result.keys()) == ["a", "b"]
+
+    def test_fallback_when_no_persisted_clips(self):
+        """老素材没有 atom_clips 时，内存按 3-6 秒均匀切片，标记 is_fallback。"""
+        atom_repo = FakeAtomRepo({})
+        asset_repo = FakeAssetRepo({"old": 20.0})
+        result = load_atom_clips_for_assets(["old"], atom_clip_repo=atom_repo, asset_repo=asset_repo)
+        assert "old" in result
+        clips = result["old"]
+        assert clips
+        assert all(c.is_fallback for c in clips)
+        assert abs(clips[-1].end_time - 20.0) < 0.01
+
+    def test_missing_duration_skipped(self):
+        atom_repo = FakeAtomRepo({})
+        asset_repo = FakeAssetRepo({})
+        result = load_atom_clips_for_assets(["ghost"], atom_clip_repo=atom_repo, asset_repo=asset_repo)
+        assert result == {}
+
+    def test_no_asset_repo_skips_empty_assets(self):
+        atom_repo = FakeAtomRepo({})
+        result = load_atom_clips_for_assets(["a"], atom_clip_repo=atom_repo, asset_repo=None)
+        assert result == {}
+
+    def test_mixed_persisted_and_fallback(self):
+        atom_repo = FakeAtomRepo({"new": [_atom("new", 0, 0, 5)]})
+        asset_repo = FakeAssetRepo({"new": 5.0, "old": 10.0})
+        result = load_atom_clips_for_assets(["new", "old"], atom_clip_repo=atom_repo, asset_repo=asset_repo)
+        assert not result["new"][0].is_fallback
+        assert all(c.is_fallback for c in result["old"])
+
+    def test_repo_exception_falls_back(self):
+        class BrokenRepo(FakeAtomRepo):
+            def find_candidates_for_selection(self, asset_ids, *, limit=0):
+                raise RuntimeError("db down")
+
+        asset_repo = FakeAssetRepo({"a": 9.0})
+        result = load_atom_clips_for_assets(["a"], atom_clip_repo=BrokenRepo({}), asset_repo=asset_repo)
+        assert result["a"]
+        assert all(c.is_fallback for c in result["a"])
+
+    def test_empty_input(self):
+        assert load_atom_clips_for_assets([], atom_clip_repo=FakeAtomRepo({})) == {}
+
+
+class TestFlatten:
+    def test_flatten_order(self):
+        clips = flatten_candidates({"a": [_atom("a", 0, 0, 4)], "b": [_atom("b", 0, 0, 4), _atom("b", 1, 4, 8)]})
+        assert len(clips) == 3
+        assert clips[0].asset_id == "a"

tests/unit/test_1970_atom_clip_selector.py

@@ -0,0 +1,205 @@
+"""#1970 原子片段级选片核心单元测试（纯函数，不依赖 DB）."""
+
+from __future__ import annotations
+
+import random
+
+from packages.domain.asset_atom_clip import AssetAtomClip
+from packages.domain.atom_clip_selector import (
+    clips_to_segments,
+    estimate_required_clip_count,
+    reselect_clips_from_atoms,
+    score_atom_clip,
+    select_atom_clips,
+)
+from packages.domain.atom_clip_service import compute_atom_clips
+
+
+def _clip(asset_id: str, start: float, end: float, clip_id: str = "") -> AssetAtomClip:
+    return (
+        AssetAtomClip.create(
+            asset_id=asset_id,
+            start_time=start,
+            end_time=end,
+            clip_index=int(start),
+        )
+        if not clip_id
+        else AssetAtomClip(
+            id=clip_id,
+            asset_id=asset_id,
+            start_time=start,
+            end_time=end,
+            duration=round(end - start, 3),
+            clip_index=0,
+        )
+    )
+
+
+class TestEstimateCount:
+    def test_basic(self):
+        assert estimate_required_clip_count(30.0, 4.5) == 7
+        assert estimate_required_clip_count(18.0, 4.0) == round(18 / 4)
+
+    def test_invalid_inputs_returns_one(self):
+        assert estimate_required_clip_count(0) == 1
+        assert estimate_required_clip_count(10, 0) == 1
+        assert estimate_required_clip_count(-1) == 1
+
+
+class TestScore:
+    def test_unused_beats_used(self):
+        c = _clip("a1", 0, 4)
+        s_unused = score_atom_clip(c, target_duration=4.0, used_in_video=set())
+        s_used = score_atom_clip(c, target_duration=4.0, used_in_video={c.id})
+        assert s_unused > s_used
+
+    def test_duration_fit_better_when_closer(self):
+        target = 4.0
+        exact = score_atom_clip(_clip("a", 0, 4.0), target_duration=target)
+        short = score_atom_clip(_clip("b", 0, 1.5), target_duration=target)
+        assert exact > short
+
+    def test_history_penalty(self):
+        c = _clip("a1", 0, 4)
+        normal = score_atom_clip(c, target_duration=4.0)
+        penalized = score_atom_clip(c, target_duration=4.0, recently_used={c.id})
+        assert normal > penalized
+
+    def test_asset_balance_penalizes_repeated_asset(self):
+        c1 = _clip("a", 0, 4)
+        first = score_atom_clip(c1, target_duration=4.0, asset_usage_counts={})
+        third = score_atom_clip(c1, target_duration=4.0, asset_usage_counts={"a": 2})
+        assert first > third
+
+
+class TestSelect:
+    def test_no_duplicate_atom_within_video(self):
+        pool = compute_atom_clips("a", 30.0, rng=random.Random(1))
+        used: set[str] = set()
+        usage: dict[str, int] = {}
+        chosen = []
+        rng = random.Random(5)
+        for _ in range(4):
+            ranked = select_atom_clips(
+                pool,
+                target_duration=4.0,
+                used_atom_clip_ids=used,
+                asset_usage_counts=usage,
+                required_count=4,
+                limit=1,
+                rng=rng,
+            )
+            assert ranked
+            pick = ranked[0]
+            assert pick.atom_clip_id not in used
+            chosen.append(pick)
+            used.add(pick.atom_clip_id)
+            usage[pick.asset_id] = usage.get(pick.asset_id, 0) + 1
+        assert len(used) == 4
+
+    def test_same_asset_different_clips_allowed(self):
+        pool = compute_atom_clips("a", 30.0, rng=random.Random(2))
+        used: set[str] = set()
+        usage: dict[str, int] = {}
+        rng = random.Random(7)
+        picked_assets = set()
+        for _ in range(3):
+            pick = select_atom_clips(
+                pool,
+                target_duration=4.0,
+                used_atom_clip_ids=used,
+                asset_usage_counts=usage,
+                limit=1,
+                rng=rng,
+            )[0]
+            used.add(pick.atom_clip_id)
+            usage[pick.asset_id] = usage.get(pick.asset_id, 0) + 1
+            picked_assets.add(pick.asset_id)
+        # 单素材池允许同素材多片段
+        assert picked_assets == {"a"}
+        assert len(used) == 3
+
+    def test_exhausted_pool_returns_empty(self):
+        pool = [_clip("a", 0, 4)]
+        ranked = select_atom_clips(pool, used_atom_clip_ids={pool[0].id}, target_duration=4.0)
+        assert ranked == []
+
+    def test_recently_used_deprioritized_not_hard_blocked(self):
+        # 两个片段，recent 中包含更合适的那个；它应被降权但不会从候选中消失
+        fresh = _clip("a", 0, 2.0, clip_id="fresh")
+        recent = _clip("b", 0, 4.0, clip_id="recent")
+        ranked = select_atom_clips(
+            [fresh, recent],
+            target_duration=4.0,
+            recently_used_atom_ids={"recent"},
+            limit=2,
+            rng=random.Random(0),  # 噪声 0 不影响
+        )
+        ids = [r.atom_clip_id for r in ranked]
+        assert set(ids) == {"fresh", "recent"}
+        # 降权 + 噪声可能导致排序不稳定，只验证 recent 仍在候选中（不硬禁）
+
+    def test_limit(self):
+        pool = compute_atom_clips("a", 40.0, rng=random.Random(4))
+        ranked = select_atom_clips(pool, target_duration=4.0, limit=3)
+        assert len(ranked) == 3
+        scores = [r.score for r in ranked]
+        assert scores == sorted(scores, reverse=True)
+
+
+class TestClipsToSegments:
+    def test_grouped_by_asset_sorted(self):
+        clips = [
+            _clip("a", 10, 14),
+            _clip("a", 0, 4),
+            _clip("b", 2, 6),
+        ]
+        segs = clips_to_segments(clips)
+        assert segs["a"] == [(0, 4), (10, 14)]
+        assert segs["b"] == [(2, 6)]
+
+
+class TestReselectFromAtoms:
+    def _src(self, n):
+        return [{"order": i, "clip_type": "main", "duration": 4.0, "start_time": 0.0} for i in range(n)]
+
+    def test_skeleton_preserved_and_unique(self):
+        pool = compute_atom_clips("a", 30.0, rng=random.Random(11)) + compute_atom_clips(
+            "b", 30.0, rng=random.Random(12)
+        )
+        out = reselect_clips_from_atoms(self._src(5), pool, rng=random.Random(13))
+        assert out is not None
+        assert len(out) == 5
+        ids = [c["atom_clip_id"] for c in out]
+        assert len(set(ids)) == 5
+        for c in out:
+            assert c["asset_id"]
+            assert c["start_time"] >= 0
+            assert c["duration"] > 0
+
+    def test_insufficient_candidates_returns_none(self):
+        pool = compute_atom_clips("a", 10.0, rng=random.Random(1))
+        assert reselect_clips_from_atoms(self._src(20), pool) is None
+
+    def test_non_main_clips_left_untouched(self):
+        pool = compute_atom_clips("a", 30.0, rng=random.Random(8))
+        src = [
+            {"order": 0, "clip_type": "intro", "duration": 2.0, "asset_id": "fixed"},
+            {"order": 1, "clip_type": "main", "duration": 4.0},
+        ]
+        out = reselect_clips_from_atoms(src, pool, rng=random.Random(3))
+        assert out is not None
+        assert out[0]["asset_id"] == "fixed"
+        assert "atom_clip_id" not in out[0]
+        assert out[1].get("atom_clip_id")
+
+    def test_empty_inputs(self):
+        assert reselect_clips_from_atoms([], [_clip("a", 0, 4)]) is None
+        assert reselect_clips_from_atoms(self._src(2), []) is None
+
+    def test_batch_used_excluded(self):
+        pool = compute_atom_clips("a", 30.0, rng=random.Random(21))
+        batch_used = {pool[0].id}
+        out = reselect_clips_from_atoms(self._src(3), pool, batch_used_atom_ids=batch_used, rng=random.Random(22))
+        assert out is not None
+        assert pool[0].id not in {c["atom_clip_id"] for c in out}

tests/unit/test_1970_atom_clip_service.py

@@ -0,0 +1,151 @@
+"""#1970 素材原子化切片逻辑单元测试（纯函数，不依赖 DB）."""
+
+from __future__ import annotations
+
+import random
+
+import pytest
+
+from packages.domain.asset_atom_clip import AssetAtomClip
+from packages.domain.atom_clip_service import (
+    MAX_CLIP_SECONDS,
+    MIN_CLIP_SECONDS,
+    compute_atom_clips,
+    compute_fallback_clips,
+)
+
+
+class TestComputeAtomClips:
+    def test_short_asset_under_6s_single_clip(self):
+        """<6 秒素材整条作为一个片段，不切。"""
+        for dur in (0.1, 3.0, 5.99):
+            clips = compute_atom_clips("a1", dur, rng=random.Random(1))
+            assert len(clips) == 1
+            assert clips[0].start_time == 0.0
+            assert abs(clips[0].end_time - dur) < 0.01
+            assert clips[0].clip_index == 0
+
+    def test_exactly_6s_single_clip(self):
+        clips = compute_atom_clips("a1", 6.0, rng=random.Random(1))
+        assert len(clips) == 1
+        assert clips[0].start_time == 0.0
+
+    def test_zero_and_negative_duration_returns_empty(self):
+        assert compute_atom_clips("a1", 0) == []
+        assert compute_atom_clips("a1", -1.0) == []
+
+    @pytest.mark.parametrize("seed", range(30))
+    def test_clips_in_3_to_6_range(self, seed):
+        """除末段外，每段时长在 3~6 秒；末段 >=3 秒。"""
+        clips = compute_atom_clips("a1", 60.0, rng=random.Random(seed))
+        assert len(clips) >= 2
+        for clip in clips[:-1]:
+            assert MIN_CLIP_SECONDS - 0.06 <= clip.duration <= MAX_CLIP_SECONDS + 0.06
+        # 末段 >=3（不足 3 应已合并）
+        assert clips[-1].duration >= MIN_CLIP_SECONDS - 0.06
+
+    @pytest.mark.parametrize("dur", [6.01, 7.0, 9.0, 12.3, 30.0, 45.3, 100.0])
+    def test_full_coverage_no_gaps_no_overlap(self, dur):
+        clips = compute_atom_clips("a1", dur, rng=random.Random(int(dur * 100) % 10000))
+        assert abs(clips[0].start_time) < 0.001
+        assert abs(clips[-1].end_time - dur) < 0.01
+        for prev, nxt in zip(clips, clips[1:], strict=False):
+            assert abs(prev.end_time - nxt.start_time) < 0.001
+
+    def test_clip_index_sequential(self):
+        clips = compute_atom_clips("a1", 40.0, rng=random.Random(5))
+        assert [c.clip_index for c in clips] == list(range(len(clips)))
+
+    def test_tail_shorter_than_3s_merges_into_previous(self):
+        """末段不足 3 秒必须合并到前一段。"""
+        # 多跑种子，保证任何随机结果都不存在 <3s 的末段
+        for seed in range(100):
+            clips = compute_atom_clips("a1", 7.5, rng=random.Random(seed))
+            assert clips[-1].duration >= MIN_CLIP_SECONDS - 0.06
+            assert abs(clips[-1].end_time - 7.5) < 0.01
+
+    def test_tail_between_3_and_6_stands_alone(self):
+        """末段 >=3 秒独立成段。"""
+        found_standalone = False
+        for seed in range(100):
+            clips = compute_atom_clips("a1", 9.5, rng=random.Random(seed))
+            if len(clips) == 2:
+                found_standalone = True
+                assert clips[-1].duration >= MIN_CLIP_SECONDS - 0.06
+        assert found_standalone, "9.5s 至少在某些种子下应切为两段"
+
+    def test_scene_change_snap_within_window(self):
+        """切点 0.5s 窗口内有切换点时，切点对齐到切换处。"""
+        aligned = 0
+        for seed in range(500):
+            clips = compute_atom_clips("a1", 20.0, scene_change_points=[4.52], rng=random.Random(seed))
+            if any(c.scene_change_at == 4.52 for c in clips):
+                aligned += 1
+                hit = next(c for c in clips if c.scene_change_at == 4.52)
+                # 命中片段的右边界即切换点
+                assert abs(hit.end_time - 4.52) < 0.001
+        assert aligned > 0
+
+    def test_scene_change_outside_window_not_force_aligned(self):
+        """窗口外的切换点不应强行对齐。"""
+        clips = compute_atom_clips("a1", 30.0, scene_change_points=[15.0], rng=random.Random(1))
+        for c in clips:
+            if c.scene_change_at is not None:
+                assert abs(c.end_time - c.scene_change_at) < 0.001
+
+    def test_scene_snap_never_creates_sub_3s_clip(self):
+        """对齐不能导致片段短于 3 秒。"""
+        for seed in range(100):
+            clips = compute_atom_clips("a1", 40.0, scene_change_points=[3.2, 6.3, 9.4], rng=random.Random(seed))
+            for c in clips:
+                assert c.duration >= MIN_CLIP_SECONDS - 0.06
+
+    def test_scene_points_out_of_duration_ignored(self):
+        clips = compute_atom_clips("a1", 20.0, scene_change_points=[-1.0, 25.0, 4.0], rng=random.Random(3))
+        assert all(c.scene_change_at != -1.0 and c.scene_change_at != 25.0 for c in clips)
+
+    def test_tags_inherited(self):
+        clips = compute_atom_clips("a1", 30.0, tags=["t1", "t2"], rng=random.Random(2))
+        assert all(c.tags == ["t1", "t2"] for c in clips)
+
+    def test_random_not_fixed_rhythm(self):
+        """随机切片：不同种子产出的切点集合应不同（避免固定节奏）。"""
+        cuts1 = [c.end_time for c in compute_atom_clips("a1", 60.0, rng=random.Random(1))]
+        cuts2 = [c.end_time for c in compute_atom_clips("a1", 60.0, rng=random.Random(2))]
+        assert cuts1 != cuts2
+
+    def test_seed_reproducible(self):
+        """相同种子结果可复现。"""
+        a = [(c.start_time, c.end_time) for c in compute_atom_clips("a1", 60.0, rng=random.Random(42))]
+        b = [(c.start_time, c.end_time) for c in compute_atom_clips("a1", 60.0, rng=random.Random(42))]
+        assert a == b
+
+
+class TestComputeFallbackClips:
+    def test_fallback_marked_and_uniform(self):
+        clips = compute_fallback_clips("a1", 20.0, clip_seconds=4.5)
+        assert clips
+        assert all(c.is_fallback for c in clips)
+        for prev, nxt in zip(clips, clips[1:], strict=False):
+            assert abs(prev.end_time - nxt.start_time) < 0.001
+        assert abs(clips[-1].end_time - 20.0) < 0.01
+
+    def test_fallback_tail_merge(self):
+        """11.5s = 4.5+4.5+2.5 → 末段 2.5<3 合并 → 4.5+7.0。"""
+        clips = compute_fallback_clips("a1", 11.5, clip_seconds=4.5)
+        assert len(clips) == 2
+        assert abs(clips[-1].duration - 7.0) < 0.01
+
+    def test_fallback_short_asset(self):
+        clips = compute_fallback_clips("a1", 2.0)
+        assert len(clips) == 1
+        assert clips[0].is_fallback
+
+    def test_fallback_invalid_duration(self):
+        assert compute_fallback_clips("a1", 0) == []
+        assert compute_fallback_clips("a1", -5) == []
+
+    def test_fallback_clip_has_no_persisted_id(self):
+        clips = compute_fallback_clips("a1", 10.0)
+        # 兜底片段仍有运行时 id（dataclass 生成），但 is_fallback 是判别标记
+        assert all(isinstance(c, AssetAtomClip) for c in clips)

tests/unit/test_1970_atom_clip_tagger.py

@@ -0,0 +1,292 @@
+"""#1970 P2 片段级 AI 标签模块测试。
+
+测试范围：
+- build_vision_prompt: 返回有效 prompt
+- parse_vision_response: 正常/异常/空值
+- tag_atom_clip: 成功/MediaKit不可用/视觉API失败/超时降级
+"""
+
+from __future__ import annotations
+
+import json
+from dataclasses import dataclass, field
+from datetime import UTC, datetime
+
+import pytest
+
+from packages.domain.atom_clip_tagger import (
+    build_vision_prompt,
+    parse_vision_response,
+    tag_atom_clip,
+)
+
+# ── Fake 对象 ──────────────────────────────────────────────────────────────
+
+
+@dataclass
+class FakeClip:
+    id: str = "clip-001"
+    asset_id: str = "asset-001"
+    start_time: float = 0.0
+    end_time: float = 5.0
+    duration: float = 5.0
+    clip_index: int = 0
+    tags: list[str] = field(default_factory=lambda: ["tag1", "tag2"])
+    ai_tags: dict | None = None
+
+
+class FakeDoubaoClient:
+    """模拟豆包客户端."""
+
+    def __init__(self, available: bool = True, response: str | None = None, raise_error: bool = False):
+        self._available = available
+        self._response = response
+        self._raise_error = raise_error
+        self.vision_calls: list[dict] = []
+
+    @property
+    def is_available(self) -> bool:
+        return self._available
+
+    def vision_completion(self, messages, images=None, timeout=None, **kwargs):
+        self.vision_calls.append({"messages": messages, "images": images, "timeout": timeout})
+        if self._raise_error:
+            raise RuntimeError("API error")
+        return self._response
+
+
+class FakeMediaKitClient:
+    """模拟 MediaKit 客户端."""
+
+    def __init__(self, available: bool = True, frames: list[dict] | None = None):
+        self._available = available
+        self._frames = frames
+
+    @property
+    def is_available(self) -> bool:
+        return self._available
+
+    def extract_frames(self, video_url, strategy=None, max_frames=None, **kwargs):
+        return self._frames
+
+
+# ── build_vision_prompt ────────────────────────────────────────────────────
+
+
+class TestBuildVisionPrompt:
+    def test_returns_non_empty_string(self):
+        prompt = build_vision_prompt()
+        assert isinstance(prompt, str)
+        assert len(prompt) > 100
+
+    def test_contains_required_keys(self):
+        prompt = build_vision_prompt()
+        assert "scene" in prompt
+        assert "objects" in prompt
+        assert "action" in prompt
+        assert "shot" in prompt
+        assert "has_text" in prompt
+
+    def test_requests_json_format(self):
+        prompt = build_vision_prompt()
+        assert "JSON" in prompt or "json" in prompt
+
+
+# ── parse_vision_response ──────────────────────────────────────────────────
+
+
+class TestParseVisionResponse:
+    def test_valid_json(self):
+        response = json.dumps(
+            {
+                "scene": ["工厂", "车间"],
+                "objects": ["产品", "机器"],
+                "action": ["演示"],
+                "shot": "特写",
+                "has_text": True,
+            }
+        )
+        result = parse_vision_response(response)
+        assert result["scene"] == ["工厂", "车间"]
+        assert result["objects"] == ["产品", "机器"]
+        assert result["action"] == ["演示"]
+        assert result["shot"] == "特写"
+        assert result["has_text"] is True
+
+    def test_json_with_markdown_code_block(self):
+        response = '```json\n{"scene": ["办公室"], "objects": ["电脑"], "action": ["说话"], "shot": "中景", "has_text": false}\n```'
+        result = parse_vision_response(response)
+        assert result["scene"] == ["办公室"]
+        assert result["has_text"] is False
+
+    def test_json_embedded_in_text(self):
+        response = '这是一些说明文字\n{"scene": ["户外"], "objects": ["汽车"], "action": ["展示"], "shot": "远景", "has_text": false}\n结束'
+        result = parse_vision_response(response)
+        assert result["scene"] == ["户外"]
+
+    def test_empty_response(self):
+        assert parse_vision_response("") == {}
+        assert parse_vision_response(None) == {}
+        assert parse_vision_response("   ") == {}
+
+    def test_invalid_json(self):
+        assert parse_vision_response("这不是JSON") == {}
+
+    def test_partial_fields(self):
+        response = json.dumps({"scene": ["工厂"]})
+        result = parse_vision_response(response)
+        assert result["scene"] == ["工厂"]
+        assert result["objects"] == []
+        assert result["shot"] == ""
+        assert result["has_text"] is False
+
+    def test_invalid_shot_value(self):
+        response = json.dumps({"scene": [], "objects": [], "action": [], "shot": "全景", "has_text": False})
+        result = parse_vision_response(response)
+        # "全景" 不在有效值 ("特写", "中景", "远景") 中
+        assert result["shot"] == ""
+
+    def test_string_values_converted_to_list(self):
+        response = json.dumps(
+            {"scene": "工厂", "objects": "产品", "action": "演示", "shot": "特写", "has_text": "true"}
+        )
+        result = parse_vision_response(response)
+        assert result["scene"] == ["工厂"]
+        assert result["objects"] == ["产品"]
+        assert result["has_text"] is True
+
+    def test_non_dict_json(self):
+        assert parse_vision_response("[1, 2, 3]") == {}
+        assert parse_vision_response('"hello"') == {}
+
+
+# ── tag_atom_clip ──────────────────────────────────────────────────────────
+
+
+class TestTagAtomClip:
+    def test_success_with_mediakit(self):
+        """MediaKit 可用 + 视觉 API 成功 → 返回完整 AI 标签."""
+        clip = FakeClip()
+        fake_doubao = FakeDoubaoClient(
+            response=json.dumps(
+                {
+                    "scene": ["工厂"],
+                    "objects": ["产品"],
+                    "action": ["演示"],
+                    "shot": "特写",
+                    "has_text": False,
+                }
+            )
+        )
+        fake_mediakit = FakeMediaKitClient(
+            frames=[
+                {"image_url": "https://example.com/frame1.jpg", "timestamp": 0.0},
+                {"image_url": "https://example.com/frame2.jpg", "timestamp": 2.5},
+                {"image_url": "https://example.com/frame3.jpg", "timestamp": 5.0},
+            ]
+        )
+
+        result = tag_atom_clip(
+            clip=clip,
+            video_url="https://example.com/video.mp4",
+            doubao_client=fake_doubao,
+            mediakit_client=fake_mediakit,
+        )
+
+        assert result["scene"] == ["工厂"]
+        assert result["objects"] == ["产品"]
+        assert result["shot"] == "特写"
+        assert result["inherited_tags"] == ["tag1", "tag2"]
+        assert len(fake_doubao.vision_calls) == 1
+
+    def test_doubao_unavailable_returns_inherited(self):
+        """DoubaoClient 不可用 → 返回 inherited_tags."""
+        clip = FakeClip()
+        fake_doubao = FakeDoubaoClient(available=False)
+
+        result = tag_atom_clip(
+            clip=clip,
+            video_url="https://example.com/video.mp4",
+            doubao_client=fake_doubao,
+        )
+
+        assert result == {"inherited_tags": ["tag1", "tag2"]}
+        assert len(fake_doubao.vision_calls) == 0
+
+    def test_mediakit_unavailable_no_ffmpeg(self):
+        """MediaKit 不可用 + 无 ffmpeg → 降级 inherited_tags."""
+        clip = FakeClip()
+        fake_doubao = FakeDoubaoClient()
+        fake_mediakit = FakeMediaKitClient(available=False)
+
+        result = tag_atom_clip(
+            clip=clip,
+            video_url="https://example.com/video.mp4",
+            doubao_client=fake_doubao,
+            mediakit_client=fake_mediakit,
+        )
+
+        # 没有 ffmpeg 的情况下，帧提取失败
+        assert result == {"inherited_tags": ["tag1", "tag2"]}
+
+    def test_vision_api_error_returns_inherited(self):
+        """视觉 API 抛异常 → 降级 inherited_tags."""
+        clip = FakeClip()
+        fake_doubao = FakeDoubaoClient(raise_error=True)
+        fake_mediakit = FakeMediaKitClient(frames=[{"image_url": "https://example.com/frame.jpg", "timestamp": 0.0}])
+
+        result = tag_atom_clip(
+            clip=clip,
+            video_url="https://example.com/video.mp4",
+            doubao_client=fake_doubao,
+            mediakit_client=fake_mediakit,
+        )
+
+        assert result == {"inherited_tags": ["tag1", "tag2"]}
+
+    def test_vision_api_empty_response(self):
+        """视觉 API 返回空 → 降级 inherited_tags."""
+        clip = FakeClip()
+        fake_doubao = FakeDoubaoClient(response=None)
+        fake_mediakit = FakeMediaKitClient(frames=[{"image_url": "https://example.com/frame.jpg", "timestamp": 0.0}])
+
+        result = tag_atom_clip(
+            clip=clip,
+            video_url="https://example.com/video.mp4",
+            doubao_client=fake_doubao,
+            mediakit_client=fake_mediakit,
+        )
+
+        assert result == {"inherited_tags": ["tag1", "tag2"]}
+
+    def test_vision_api_invalid_json_response(self):
+        """视觉 API 返回无效 JSON → 降级 inherited_tags."""
+        clip = FakeClip()
+        fake_doubao = FakeDoubaoClient(response="这不是JSON格式")
+        fake_mediakit = FakeMediaKitClient(frames=[{"image_url": "https://example.com/frame.jpg", "timestamp": 0.0}])
+
+        result = tag_atom_clip(
+            clip=clip,
+            video_url="https://example.com/video.mp4",
+            doubao_client=fake_doubao,
+            mediakit_client=fake_mediakit,
+        )
+
+        assert result == {"inherited_tags": ["tag1", "tag2"]}
+
+    def test_clip_with_empty_tags(self):
+        """空素材标签 → inherited_tags 为空列表."""
+        clip = FakeClip(tags=[])
+        fake_doubao = FakeDoubaoClient(available=False)
+
+        result = tag_atom_clip(
+            clip=clip,
+            video_url="https://example.com/video.mp4",
+            doubao_client=fake_doubao,
+        )
+
+        assert result == {"inherited_tags": []}
+
+
+if __name__ == "__main__":
+    pytest.main([__file__, "-q"])

tests/unit/test_1970_atom_plan_generation.py

@@ -0,0 +1,181 @@
+"""#1970 PlanGeneratorService 原子片段选片端到端单元测试.
+
+用 SQLite 内存库 + 真实仓储验证：注入 atom_clip_repo 后，正式生成（非预览）
+从原子片段选片，EditPlanClip.atom_clip_id 落库；预览模式保持旧路径。
+"""
+
+from __future__ import annotations
+
+import os
+import sys
+from pathlib import Path
+
+os.environ.setdefault("JWT_SECRET_KEY", "unit-test-secret-key-for-testing")
+os.environ.setdefault("DATABASE_URL", "sqlite:///test.db")
+sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "apps" / "api"))
+
+import pytest
+from app.services.plan_generator_service import PlanGeneratorService
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+
+from packages.adapters.sqlalchemy_impl.asset_atom_clip_repository import (
+    SQLAlchemyAssetAtomClipRepository,
+)
+from packages.adapters.sqlalchemy_impl.models import Base
+from packages.domain.asset_atom_clip import AssetAtomClip
+from packages.domain.edit_template import EditTemplate, EditTemplateStatus
+from packages.domain.editing_mode import EditingMode
+from packages.domain.template_clip_config import ClipType, TemplateClipConfig
+
+
+class _FakeAsset:
+    def __init__(self, aid, duration):
+        self.id = aid
+        self.duration = duration
+        self.quality_score = 60.0
+        self.metadata = {}
+        self.created_at = None
+
+
+class FakeAssetRepo:
+    def __init__(self, durations):
+        self._durations = durations
+
+    def get(self, aid):
+        return _FakeAsset(aid, self._durations[aid]) if aid in self._durations else None
+
+
+@pytest.fixture()
+def db_session():
+    engine = create_engine("sqlite://")
+    # 只建相关表，避免全模型依赖
+    Base.metadata.create_all(
+        engine,
+        tables=[
+            Base.metadata.tables["edit_plans"],
+            Base.metadata.tables["edit_plan_clips"],
+            Base.metadata.tables["asset_atom_clips"],
+        ],
+    )
+    connection = engine.connect()
+    Session = sessionmaker(bind=connection)
+    session = Session()
+    yield session
+    session.close()
+    connection.close()
+
+
+def _template(mode=EditingMode.ONE_TAKE.value):
+    return EditTemplate(
+        id="tpl-1",
+        name="测试模板",
+        editing_mode=mode,
+        status=EditTemplateStatus.ACTIVE,
+    )
+
+
+def _clip_configs(n=3):
+    return [
+        TemplateClipConfig(
+            id=f"cfg-{i}",
+            template_id="tpl-1",
+            clip_type=ClipType.MAIN,
+            order=i,
+            min_duration=3.0,
+            max_duration=6.0,
+        )
+        for i in range(n)
+    ]
+
+
+class TestAtomClipPlanGeneration:
+    def test_generation_uses_atom_clips(self, db_session):
+        atom_repo = SQLAlchemyAssetAtomClipRepository(db_session)
+        # 两个素材各 30s，各切若干片段
+        clips_a = [AssetAtomClip.create("asset-a", i * 5.0, i * 5.0 + 5.0, i) for i in range(6)]
+        clips_b = [AssetAtomClip.create("asset-b", i * 5.0, i * 5.0 + 5.0, i) for i in range(6)]
+        atom_repo.batch_create(clips_a + clips_b)
+        db_session.commit()
+
+        svc = PlanGeneratorService(
+            db_session,
+            asset_repo=FakeAssetRepo({"asset-a": 30.0, "asset-b": 30.0}),
+            atom_clip_repo=atom_repo,
+        )
+        result = svc.generate_from_template(
+            template=_template(),
+            clip_configs=_clip_configs(3),
+            asset_ids=["asset-a", "asset-b"],
+            created_by_user_id="user-1",
+        )
+        clips = result["clips"]
+        assert len(clips) == 3
+        # 每个 clip 都绑定了原子片段
+        atom_ids = [c.atom_clip_id for c in clips]
+        assert all(atom_ids)
+        # 同一原子片段一个视频只用一次
+        assert len(set(atom_ids)) == 3
+        # start_time/duration 与选中片段一致
+        for c in clips:
+            assert c.start_time >= 0
+            assert 0 < c.duration <= 6.0 + 0.01
+        # asset_id 与 atom_clip 归属一致
+        for c in clips:
+            assert c.asset_id.startswith("asset-")
+
+    def test_fallback_when_atom_clips_not_ready(self, db_session):
+        """素材没有 atom_clips 时内存兜底切片，仍能选出片段。"""
+        atom_repo = SQLAlchemyAssetAtomClipRepository(db_session)
+        svc = PlanGeneratorService(
+            db_session,
+            asset_repo=FakeAssetRepo({"old-asset": 20.0}),
+            atom_clip_repo=atom_repo,
+        )
+        result = svc.generate_from_template(
+            template=_template(),
+            clip_configs=_clip_configs(3),
+            asset_ids=["old-asset"],
+            created_by_user_id="user-1",
+        )
+        clips = result["clips"]
+        # 兜底片段不落库、无持久 ID，clip 不绑定 atom_clip_id（回退旧路径）或绑定运行时 ID
+        # 关键：必须成功选出素材，不报错
+        assert all(c.asset_id == "old-asset" for c in clips)
+
+    def test_preview_mode_keeps_legacy_path(self, db_session):
+        """随机预览模式走旧路径，不要求 atom clips。"""
+        atom_repo = SQLAlchemyAssetAtomClipRepository(db_session)
+        svc = PlanGeneratorService(
+            db_session,
+            asset_repo=FakeAssetRepo({"asset-a": 30.0, "asset-b": 30.0, "asset-c": 30.0}),
+            atom_clip_repo=atom_repo,
+        )
+        result = svc.generate_from_template(
+            template=_template(),
+            clip_configs=_clip_configs(3),
+            asset_ids=["asset-a", "asset-b", "asset-c"],
+            created_by_user_id="user-1",
+            random_preview=True,
+        )
+        clips = result["clips"]
+        assert len(clips) == 3
+        assert {c.asset_id for c in clips} == {"asset-a", "asset-b", "asset-c"}
+        # 预览路径不绑定 atom_clip_id
+        assert all(not c.atom_clip_id for c in clips)
+
+    def test_no_atom_repo_uses_legacy_path(self, db_session):
+        """未注入 atom_clip_repo（旧调用方）时行为不变。"""
+        svc = PlanGeneratorService(
+            db_session,
+            asset_repo=FakeAssetRepo({"asset-a": 30.0, "asset-b": 30.0, "asset-c": 30.0}),
+        )
+        result = svc.generate_from_template(
+            template=_template(),
+            clip_configs=_clip_configs(3),
+            asset_ids=["asset-a", "asset-b", "asset-c"],
+            created_by_user_id="user-1",
+        )
+        clips = result["clips"]
+        assert len(clips) == 3
+        assert {c.asset_id for c in clips} == {"asset-a", "asset-b", "asset-c"}

tests/unit/test_1970_celery_ai_tag_registration.py

@@ -0,0 +1,82 @@
+"""#1970 AI 标签 Celery 任务注册回归测试。
+
+背景：staging 上 worker.generate_atom_clips 正常派发 tag_atom_clip，
+但消费端报 "Received unregistered task of type 'worker.tag_atom_clip'"，
+根因是 celery_app.conf.imports 漏列任务模块，worker 进程从未 import 之。
+
+注意：tests/unit 下大量旧测试在 import 期向 sys.modules 注入
+worker_app.celery_app 的 MagicMock 且不还原，全量收集时会污染本测试，
+因此这里用 AST 静态解析 + 隔离子进程验证，不依赖 sys.modules 状态。
+"""
+
+from __future__ import annotations
+
+import ast
+import os
+import subprocess
+import sys
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parents[2]
+CELERY_APP_PY = REPO_ROOT / "apps" / "worker" / "worker_app" / "celery_app.py"
+
+REQUIRED_MODULES = (
+    "worker_app.tasks.atom_clip_tagging",
+    "worker_app.tasks.backfill_atom_clip_tags",
+)
+
+
+def _conf_imports_values() -> set[str]:
+    """从 celery_app.py AST 中提取 celery_app.conf.imports 元组的字符串项。"""
+    tree = ast.parse(CELERY_APP_PY.read_text(encoding="utf-8"))
+    values: set[str] = set()
+    for node in ast.walk(tree):
+        if not (isinstance(node, ast.Assign) and len(node.targets) == 1):
+            continue
+        target = node.targets[0]
+        # celery_app.conf.imports = (...) 或 conf.imports = (...)
+        if not (isinstance(target, ast.Attribute) and target.attr == "imports"):
+            continue
+        if isinstance(node.value, (ast.Tuple, ast.List)):
+            for elt in node.value.elts:
+                if isinstance(elt, ast.Constant) and isinstance(elt.value, str):
+                    values.add(elt.value)
+    return values
+
+
+def test_ai_tag_modules_in_celery_imports():
+    imports = _conf_imports_values()
+    for module in REQUIRED_MODULES:
+        assert module in imports, f"{module} 未加入 celery_app.conf.imports"
+
+
+def test_ai_tag_tasks_registered_in_isolated_process():
+    """隔离子进程（无 conftest / 无 sys.modules mock）真实加载 Celery app。"""
+    # 模拟 worker 启动时按 conf.imports import 任务模块的行为；
+    # 只导入 AI 标签两个模块（其他模块依赖 cv2 等本地未安装的重依赖）。
+    code = (
+        "import importlib, sys; "
+        "from worker_app.celery_app import celery_app; "
+        "mods = [m for m in celery_app.conf.imports or () "
+        "if 'atom_clip_tagging' in m or 'backfill_atom_clip_tags' in m]; "
+        "[importlib.import_module(m) for m in mods]; "
+        "missing = [n for n in "
+        "['worker.tag_atom_clip', 'worker.backfill_atom_clip_tags'] "
+        "if n not in celery_app.tasks]; "
+        "sys.exit(1 if missing or len(mods) < 2 else 0)"
+    )
+    env = os.environ.copy()
+    paths = [
+        str(REPO_ROOT),
+        str(REPO_ROOT / "apps" / "worker"),
+        str(REPO_ROOT / "packages"),
+    ]
+    env["PYTHONPATH"] = os.pathsep.join(paths) + os.pathsep + env.get("PYTHONPATH", "")
+    result = subprocess.run(
+        [sys.executable, "-c", code],
+        capture_output=True,
+        text=True,
+        env=env,
+        timeout=60,
+    )
+    assert result.returncode == 0, "隔离子进程中任务未注册成功:\n" f"stdout={result.stdout}\nstderr={result.stderr}"

tests/unit/test_1970_force_backfill_tags.py

@@ -0,0 +1,347 @@
+"""#1970 force 回填降级 AI 标签记录的回归测试。
+
+背景：DOUBAO_VISION_MODEL 未配置时，tagger 降级写入
+{"inherited_tags": [...]}（非 NULL），默认 backfill 只捞 ai_tags IS NULL，
+这批记录永远不会重打。force=True 时应纳入降级记录，并在打标成功后覆盖。
+
+覆盖：
+- find_untagged(include_downgraded) 的 SQL 过滤（SQLite 验证跨库 JSON 取值）
+- tag_atom_clip_task 的 force 跳过/放行/覆盖逻辑
+- backfill_atom_clip_tags(force=True) 给 tag 任务传 kwargs={"force": True}
+"""
+
+from __future__ import annotations
+
+from datetime import UTC, datetime
+from types import SimpleNamespace
+
+import pytest
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+
+from packages.adapters.sqlalchemy_impl.asset_atom_clip_repository import (
+    SQLAlchemyAssetAtomClipRepository,
+)
+from packages.adapters.sqlalchemy_impl.models import AssetAtomClipModel
+
+# ── 仓储层：find_untagged 过滤 ─────────────────────────────────────────────
+
+
+@pytest.fixture
+def repo_session():
+    engine = create_engine("sqlite:///:memory:")
+    AssetAtomClipModel.__table__.create(engine)
+    SessionTest = sessionmaker(bind=engine)
+    session = SessionTest()
+    now = datetime.now(UTC)
+    session.add_all(
+        [
+            AssetAtomClipModel(
+                id="c-null",
+                asset_id="a1",
+                start_time=0,
+                end_time=1,
+                duration=1,
+                clip_index=0,
+                tags=[],
+                ai_tags=None,
+                created_at=now,
+            ),
+            AssetAtomClipModel(
+                id="c-downgraded-empty",
+                asset_id="a1",
+                start_time=1,
+                end_time=2,
+                duration=1,
+                clip_index=1,
+                tags=[],
+                ai_tags={"inherited_tags": []},
+                created_at=now,
+            ),
+            AssetAtomClipModel(
+                id="c-downgraded-tags",
+                asset_id="a1",
+                start_time=2,
+                end_time=3,
+                duration=1,
+                clip_index=2,
+                tags=[],
+                ai_tags={"inherited_tags": ["口播"]},
+                created_at=now,
+            ),
+            AssetAtomClipModel(
+                id="c-tagged-true",
+                asset_id="a1",
+                start_time=3,
+                end_time=4,
+                duration=1,
+                clip_index=3,
+                tags=[],
+                ai_tags={"has_text": True, "scene": ["室内"], "inherited_tags": []},
+                created_at=now,
+            ),
+            AssetAtomClipModel(
+                id="c-tagged-false",
+                asset_id="a1",
+                start_time=4,
+                end_time=5,
+                duration=1,
+                clip_index=4,
+                tags=[],
+                ai_tags={"has_text": False, "inherited_tags": ["风景"]},
+                created_at=now,
+            ),
+        ]
+    )
+    session.commit()
+    # SQLAlchemy JSON 在 SQLite 下把 None 序列化为 'null' 字符串，
+    # 而生产 PostgreSQL 存的是真 SQL NULL；用原生 SQL 对齐生产语义。
+    from sqlalchemy import text
+
+    session.execute(text("UPDATE asset_atom_clips SET ai_tags = NULL WHERE id = 'c-null'"))
+    session.commit()
+    yield session
+    session.close()
+
+
+def test_find_untagged_default_only_null(repo_session):
+    repo = SQLAlchemyAssetAtomClipRepository(repo_session)
+    ids = {c.id for c in repo.find_untagged(limit=100)}
+    assert ids == {"c-null"}
+
+
+def test_find_untagged_include_downgraded(repo_session):
+    repo = SQLAlchemyAssetAtomClipRepository(repo_session)
+    ids = {c.id for c in repo.find_untagged(limit=100, include_downgraded=True)}
+    # NULL + 两条降级记录；含 has_text=true/false 的完整记录都排除
+    assert ids == {"c-null", "c-downgraded-empty", "c-downgraded-tags"}
+
+
+# ── 任务层：tag_atom_clip_task 的 force 语义 ───────────────────────────────
+
+
+def _import_tag_task_module():
+    from worker_app.tasks import atom_clip_tagging as mod
+
+    return mod
+
+
+def _call_tag_task(mod, clip_id, force):
+    """直接调用任务，兼容两种环境。
+
+    全量收集时旧测试向 sys.modules 注入 celery_app MagicMock（其 task
+    装饰器原样返回裸函数），此时是普通函数需显式传 self=None；
+    正常 Celery 环境下属性是 Task 代理对象（非普通 function），
+    已绑定 self，按业务签名直接调用即可。
+    """
+    import inspect
+
+    obj = mod.tag_atom_clip_task
+    if inspect.isfunction(obj):
+        return obj(None, clip_id, force=force)
+    return obj(clip_id, force=force)
+
+
+def test_tag_task_skips_downgraded_without_force(monkeypatch):
+    mod = _import_tag_task_module()
+    monkeypatch.setattr(
+        mod,
+        "SessionLocal",
+        lambda: SimpleNamespace(
+            rollback=lambda: None,
+            close=lambda: None,
+        ),
+    )
+
+    class _Repo:
+        def __init__(self, db):
+            pass
+
+        def find_by_id(self, clip_id):
+            return SimpleNamespace(
+                id=clip_id,
+                ai_tags={"inherited_tags": []},
+            )
+
+    monkeypatch.setattr(mod, "SQLAlchemyAssetAtomClipRepository", _Repo)
+
+    result = _call_tag_task(mod, "clip-downgraded", force=False)
+    assert result["status"] == "skipped"
+    assert result["reason"] == "already tagged"
+
+
+def test_tag_task_force_retags_downgraded_and_overwrites(monkeypatch):
+    mod = _import_tag_task_module()
+    updated: dict[str, dict] = {}
+
+    class _FakeSession:
+        def rollback(self):
+            pass
+
+        def close(self):
+            pass
+
+    monkeypatch.setattr(mod, "SessionLocal", _FakeSession)
+
+    class _AtomRepo:
+        def __init__(self, db):
+            pass
+
+        def find_by_id(self, clip_id):
+            return SimpleNamespace(
+                id=clip_id,
+                asset_id="asset-1",
+                start_time=0.0,
+                end_time=2.0,
+                tags=["旧标签"],
+                ai_tags={"inherited_tags": []},
+            )
+
+        def update_ai_tags(self, clip_id, ai_tags):
+            updated[clip_id] = ai_tags
+
+    class _AssetRepo:
+        def __init__(self, db):
+            pass
+
+        def find_by_id(self, asset_id):
+            return SimpleNamespace(id=asset_id, storage_key="k/video.mp4")
+
+    monkeypatch.setattr(mod, "SQLAlchemyAssetAtomClipRepository", _AtomRepo)
+    monkeypatch.setattr(mod, "SQLAlchemyAssetRepository", _AssetRepo)
+
+    class _Storage:
+        def get_download_url(self, key, expires_seconds=3600):
+            return "https://example.com/signed.mp4"
+
+    monkeypatch.setattr(mod, "get_shared_storage_service", lambda: _Storage())
+    monkeypatch.setattr(mod, "get_doubao_client", lambda: object())
+    monkeypatch.setattr(mod, "get_mediakit_client", lambda: None)
+
+    new_tags = {
+        "scene": ["室内"],
+        "objects": ["人物"],
+        "action": ["说话"],
+        "shot": "中景",
+        "has_text": True,
+        "inherited_tags": ["旧标签"],
+    }
+    monkeypatch.setattr(mod, "tag_atom_clip", lambda **kw: new_tags)
+
+    result = _call_tag_task(mod, "clip-downgraded", force=True)
+    assert result["status"] == "completed"
+    assert result["has_ai_tags"] is True
+    assert updated["clip-downgraded"] == new_tags
+
+
+def test_tag_task_force_still_skips_complete_tags(monkeypatch):
+    mod = _import_tag_task_module()
+    monkeypatch.setattr(
+        mod,
+        "SessionLocal",
+        lambda: SimpleNamespace(rollback=lambda: None, close=lambda: None),
+    )
+
+    class _Repo:
+        def __init__(self, db):
+            pass
+
+        def find_by_id(self, clip_id):
+            return SimpleNamespace(
+                id=clip_id,
+                ai_tags={"has_text": False, "inherited_tags": []},
+            )
+
+    monkeypatch.setattr(mod, "SQLAlchemyAssetAtomClipRepository", _Repo)
+
+    result = _call_tag_task(mod, "clip-complete", force=True)
+    assert result["status"] == "skipped"
+    assert result["reason"] == "already tagged"
+
+
+# ── backfill 任务：force 透传到 send_task ──────────────────────────────────
+
+
+def test_backfill_force_passes_kwarg(monkeypatch):
+    from worker_app.tasks import backfill_atom_clip_tags as bmod
+
+    sent: list[tuple] = []
+
+    class _FakeSession:
+        def close(self):
+            pass
+
+    monkeypatch.setattr(bmod, "SessionLocal", _FakeSession)
+
+    class _AtomRepo:
+        def __init__(self, db):
+            self.calls: list[bool] = []
+
+        def find_untagged(self, limit, include_downgraded=False):
+            self.calls.append(include_downgraded)
+            # 第一批返回一条降级记录，第二批返回空结束循环
+            if len(self.calls) == 1:
+                return [SimpleNamespace(id="clip-1")]
+            return []
+
+    repo_holder = {}
+
+    def _repo_factory(db):
+        repo = _AtomRepo(db)
+        repo_holder["repo"] = repo
+        return repo
+
+    monkeypatch.setattr(bmod, "SQLAlchemyAssetAtomClipRepository", _repo_factory)
+
+    def _send_task(name, args=None, kwargs=None):
+        sent.append((name, args, kwargs))
+
+    monkeypatch.setattr(bmod.celery_app, "send_task", _send_task)
+
+    result = bmod.backfill_atom_clip_tags(batch_size=10, batch_interval=0, force=True)
+
+    assert result["status"] == "completed"
+    assert result["total_submitted"] == 1
+    assert repo_holder["repo"].calls == [True, True]
+    assert sent == [
+        ("worker.tag_atom_clip", ["clip-1"], {"force": True}),
+    ]
+
+
+def test_backfill_default_does_not_force(monkeypatch):
+    from worker_app.tasks import backfill_atom_clip_tags as bmod
+
+    sent_kwargs: list[dict | None] = []
+
+    class _FakeSession:
+        def close(self):
+            pass
+
+    monkeypatch.setattr(bmod, "SessionLocal", _FakeSession)
+
+    class _AtomRepo:
+        def __init__(self, db):
+            self.calls: list[bool] = []
+
+        def find_untagged(self, limit, include_downgraded=False):
+            self.calls.append(include_downgraded)
+            return [SimpleNamespace(id="clip-null")] if self.calls == [False] else []
+
+    holder = {}
+
+    def _repo_factory(db):
+        holder["repo"] = _AtomRepo(db)
+        return holder["repo"]
+
+    monkeypatch.setattr(bmod, "SQLAlchemyAssetAtomClipRepository", _repo_factory)
+    monkeypatch.setattr(
+        bmod.celery_app,
+        "send_task",
+        lambda name, args=None, kwargs=None: sent_kwargs.append(kwargs),
+    )
+
+    result = bmod.backfill_atom_clip_tags(batch_size=10, batch_interval=0)
+
+    assert result["total_submitted"] == 1
+    assert holder["repo"].calls == [False, False]
+    assert sent_kwargs == [{"force": False}]

tests/unit/test_1970_gpu_worker_heartbeat.py

@@ -0,0 +1,254 @@
+"""#1970 GPU Worker 修复单测.
+
+覆盖 deploy/gpu_worker/gpu_worker.py（独立部署脚本，不在 apps/packages 包内，
+按文件路径动态加载）：
+1. 默认配置：REQUEST_TIMEOUT=900 / TASK_MAX_RETRY=1 / 心跳 30s / 最短 3s；
+2. 推理期心跳线程 POST /gpu/register 带 task_id，任务结束能停；
+3. <3s 短视频直接上报失败，不调用 MuseTalk；
+4. _call_musetalk 仅对 5xx/网络瞬时错误标记 retryable，4xx 不重试；
+5. _handle_task 只对 retryable 错误本地重试 1 次。
+"""
+
+from __future__ import annotations
+
+import importlib.util
+import os
+import sys
+import time
+from pathlib import Path
+from unittest import mock
+
+import pytest
+
+ROOT = Path(__file__).resolve().parents[2]
+WORKER_PATH = ROOT / "deploy" / "gpu_worker" / "gpu_worker.py"
+
+
+def _load_worker_module():
+    spec = importlib.util.spec_from_file_location("gpu_worker_standalone_1970", WORKER_PATH)
+    mod = importlib.util.module_from_spec(spec)
+    sys.modules[spec.name] = mod
+    spec.loader.exec_module(mod)
+    return mod
+
+
+@pytest.fixture
+def worker():
+    return _load_worker_module()
+
+
+# ── 默认配置 ───────────────────────────────────────────────────────
+
+
+def test_config_defaults_900_and_retry_one(monkeypatch):
+    """CI/本机若显式导出过这些 env，说明是运维覆盖，不应拿默认值断言；
+    因此只在四个 env 全部缺失时校验脚本内置默认值（#1970：900/1/30/3）。"""
+    keys = (
+        "REQUEST_TIMEOUT",
+        "TASK_MAX_RETRY",
+        "TASK_HEARTBEAT_INTERVAL",
+        "MIN_VIDEO_DURATION_SECONDS",
+    )
+    if any(k in os.environ for k in keys):
+        pytest.skip("环境显式设置了 worker 超时/重试变量，跳过默认值断言")
+    for key in keys:
+        monkeypatch.delenv(key, raising=False)
+    mod = _load_worker_module()
+    assert mod.Config.request_timeout == 900.0
+    assert mod.Config.task_max_retry == 1
+    assert mod.Config.task_heartbeat_interval == 30.0
+    assert mod.Config.min_video_duration_seconds == 3.0
+
+
+# ── register 携带 task_id ──────────────────────────────────────────
+
+
+def test_register_payload_includes_task_id_only_when_provided(worker, monkeypatch):
+    captured = []
+
+    class _Resp:
+        status_code = 200
+        text = ""
+
+    def _fake_post(url, json=None, headers=None, timeout=None):
+        captured.append(json)
+        return _Resp()
+
+    monkeypatch.setattr(worker.requests, "post", _fake_post)
+    monkeypatch.setattr(worker, "_check_musetalk_health", lambda: (True, {}))
+
+    assert worker._register("task-abc") is True
+    assert captured[-1]["task_id"] == "task-abc"
+    assert captured[-1]["worker_id"]
+
+    worker._register()  # 空闲心跳不带 task_id
+    assert "task_id" not in captured[-1]
+
+
+# ── 推理期心跳线程 ─────────────────────────────────────────────────
+
+
+def test_task_heartbeat_thread_sends_and_stops(worker, monkeypatch):
+    calls = []
+
+    def _fake_register(task_id=None):
+        calls.append(task_id)
+        return True
+
+    monkeypatch.setattr(worker, "_register", _fake_register)
+    hb = worker.TaskHeartbeat("task-hb1", interval=5)
+    hb.start()
+    time.sleep(0.3)  # 启动后立即发一次
+    hb.stop()
+    hb.join(timeout=2)
+    assert not hb.is_alive()
+    assert calls and all(c == "task-hb1" for c in calls)
+
+
+# ── 短视频前置拦截 ─────────────────────────────────────────────────
+
+
+def test_handle_task_short_video_reports_failed_without_inference(worker, monkeypatch, tmp_path):
+    video = tmp_path / "input.mp4"
+    video.write_bytes(b"fake-mp4-bytes")
+    audio = tmp_path / "input_audio.bin"
+    audio.write_bytes(b"fake-audio")
+    reports = []
+
+    monkeypatch.setattr(worker, "_register", lambda *a, **k: True)
+    monkeypatch.setattr(worker, "_download", lambda url, path: True)
+    # ffprobe 读出 1.2s → 低于 3s 阈值
+    monkeypatch.setattr(worker, "_probe_duration", lambda path: 1.2)
+
+    def _boom(*a, **k):
+        raise AssertionError("短视频不应调用 MuseTalk 推理")
+
+    monkeypatch.setattr(worker, "_call_musetalk", _boom)
+    monkeypatch.setattr(
+        worker,
+        "_report_result",
+        lambda task_id, success, duration=0.0, error_msg="": reports.append((task_id, success, error_msg)) or True,
+    )
+
+    task = {
+        "task_id": "task-short",
+        "video_url": "https://example.com/v.mp4",
+        "audio_url": "https://example.com/a.bin",
+    }
+    worker._handle_task(task)
+
+    assert len(reports) == 1
+    tid, ok, err = reports[0]
+    assert tid == "task-short"
+    assert ok is False
+    assert "视频过短" in err
+    assert "3" in err
+
+
+def test_handle_task_probe_failure_does_not_block(worker, monkeypatch):
+    """ffprobe 不可用（duration=0.0）时不能误杀，应继续推理."""
+    reports = []
+    monkeypatch.setattr(worker, "_register", lambda *a, **k: True)
+    monkeypatch.setattr(worker, "_download", lambda url, path: True)
+    monkeypatch.setattr(worker, "_probe_duration", lambda path: 0.0)
+    monkeypatch.setattr(
+        worker,
+        "_call_musetalk",
+        lambda v, a, o: (True, 8.0, "", False),
+    )
+    uploaded = []
+    monkeypatch.setattr(
+        worker,
+        "_report_success_with_file",
+        lambda task_id, duration, path: uploaded.append((task_id, duration)),
+    )
+    monkeypatch.setattr(worker, "_report_result", lambda *a, **k: True)
+
+    worker._handle_task({"task_id": "task-probe0", "video_url": "u", "audio_url": "u"})
+    assert uploaded == [("task-probe0", 8.0)]
+    assert reports == []
+
+
+# ── 重试语义：仅瞬时错误重试 ───────────────────────────────────────
+
+
+def test_call_musetalk_4xx_not_retryable_5xx_retryable(worker, monkeypatch, tmp_path):
+    video = tmp_path / "v.mp4"
+    audio = tmp_path / "a.bin"
+    video.write_bytes(b"v")
+    audio.write_bytes(b"a")
+    out = tmp_path / "o.mp4"
+
+    class _Resp:
+        def __init__(self, code, body=b"x" * 2048):
+            self.status_code = code
+            self.content = body
+            self.text = "err"
+
+    # 4xx：确定性失败，不重试
+    monkeypatch.setattr(worker.requests, "post", lambda *a, **k: _Resp(400))
+    ok, _, _, retryable = worker._call_musetalk(video, audio, out)
+    assert ok is False and retryable is False
+
+    monkeypatch.setattr(worker.requests, "post", lambda *a, **k: _Resp(503))
+    ok, _, _, retryable = worker._call_musetalk(video, audio, out)
+    assert ok is False and retryable is True
+
+    # 连接异常：瞬时错误，可重试
+    import requests as _requests
+
+    def _conn_err(*a, **k):
+        raise _requests.exceptions.ConnectionError("reset")
+
+    monkeypatch.setattr(worker.requests, "post", _conn_err)
+    ok, _, _, retryable = worker._call_musetalk(video, audio, out)
+    assert ok is False and retryable is True
+
+
+def test_handle_task_retries_once_for_transient_then_succeeds(worker, monkeypatch):
+    calls = []
+
+    def _fake_call(v, a, o):
+        calls.append(1)
+        if len(calls) == 1:
+            return False, 0.0, "MuseTalk HTTP 503: busy", True
+        return True, 6.5, "", False
+
+    monkeypatch.setattr(worker, "_register", lambda *a, **k: True)
+    monkeypatch.setattr(worker, "_download", lambda url, path: True)
+    monkeypatch.setattr(worker, "_probe_duration", lambda path: 12.0)
+    monkeypatch.setattr(worker, "_call_musetalk", _fake_call)
+    monkeypatch.setattr(worker, "time", mock.MagicMock())  # 重试 sleep 立即返回
+    uploaded = []
+    monkeypatch.setattr(
+        worker,
+        "_report_success_with_file",
+        lambda task_id, duration, path: uploaded.append((task_id, duration)),
+    )
+
+    worker._handle_task({"task_id": "t-retry", "video_url": "u", "audio_url": "u"})
+    assert len(calls) == 2
+    assert uploaded == [("t-retry", 6.5)]
+
+
+def test_handle_task_no_retry_for_deterministic_failure(worker, monkeypatch):
+    calls = []
+
+    def _fake_call(v, a, o):
+        calls.append(1)
+        return False, 0.0, "MuseTalk HTTP 400: bad input", False
+
+    reports = []
+    monkeypatch.setattr(worker, "_register", lambda *a, **k: True)
+    monkeypatch.setattr(worker, "_download", lambda url, path: True)
+    monkeypatch.setattr(worker, "_probe_duration", lambda path: 12.0)
+    monkeypatch.setattr(worker, "_call_musetalk", _fake_call)
+    monkeypatch.setattr(
+        worker,
+        "_report_result",
+        lambda task_id, success, duration=0.0, error_msg="": reports.append(error_msg) or True,
+    )
+
+    worker._handle_task({"task_id": "t-4xx", "video_url": "u", "audio_url": "u"})
+    assert len(calls) == 1  # 4xx 本地不重试，直接交服务端决定
+    assert reports and "400" in reports[0]

tests/unit/test_1970_hflip_ai_tags.py

@@ -0,0 +1,185 @@
+"""#1970 hflip 放开（has_text 来自 atom_clip.ai_tags）端到端参数链路测试。
+
+覆盖：
+1. UnifiedRenderService 传入 clip_has_text 后微变换计划的翻转门控；
+2. RenderAdapter._resolve_clip_has_text 按 atom_clip.ai_tags.has_text
+   解析布尔列表（显式 False 才可翻转，其余保守），失败回退 None；
+3. 纯函数层在「混合有/无文字」列表下的行为（顺序对齐）。
+"""
+
+from __future__ import annotations
+
+from types import SimpleNamespace
+from unittest.mock import MagicMock, patch
+
+import pytest
+from video_processing.micro_transform_pure import build_micro_transform_plan
+
+
+def _make_service(plan_config: dict | None = None, clip_has_text=None):
+    from video_processing.unified_render_service import UnifiedRenderService
+
+    svc = object.__new__(UnifiedRenderService)
+    svc.plan = MagicMock()
+    svc.plan.config = plan_config or {}
+    svc.plan.id = "plan-1"
+    svc.plan.clips = []
+    svc._micro_plan_cache = None
+    svc._micro_plan_loaded = False
+    svc._clip_has_text = clip_has_text
+    return svc
+
+
+def _clip(clip_id: str, atom_clip_id: str = "", clip_type: str = "main"):
+    return SimpleNamespace(id=clip_id, atom_clip_id=atom_clip_id, clip_type=clip_type)
+
+
+def _atom(clip_id: str, ai_tags):
+    return SimpleNamespace(id=clip_id, ai_tags=ai_tags)
+
+
+class TestServiceClipHasText:
+    def test_none_stays_conservative(self):
+        # 未注入检测列表：所有片段一律不翻转
+        svc = _make_service({"generation_task_id": "t1"}, clip_has_text=None)
+        plan = svc._get_micro_transform_plan(30)
+        assert plan is not None
+        assert all(c.has_text for c in plan.clips)
+        assert all(not c.hflip for c in plan.clips)
+
+    def test_explicit_no_text_allows_hflip(self):
+        # AI 明确判定无文字：允许参与 50% 翻转（40 段应至少出现一些翻转）
+        svc = _make_service({"generation_task_id": "t-allow"}, clip_has_text=[False] * 40)
+        plan = svc._get_micro_transform_plan(40)
+        assert plan is not None
+        assert all(not c.has_text for c in plan.clips)
+        assert any(c.hflip for c in plan.clips)
+        assert all(not c.hflip or not c.has_text for c in plan.clips)
+
+    def test_all_text_never_flips(self):
+        svc = _make_service({"generation_task_id": "t-text"}, clip_has_text=[True] * 40)
+        plan = svc._get_micro_transform_plan(40)
+        assert all(c.has_text for c in plan.clips)
+        assert all(not c.hflip for c in plan.clips)
+
+    def test_mixed_order_alignment(self):
+        # 仅第 0、2 个片段无文字；has_text 标记必须与片段序号严格对齐
+        svc = _make_service({"generation_task_id": "t-mix"}, clip_has_text=[False, True, False, True])
+        plan = svc._get_micro_transform_plan(4)
+        assert [c.has_text for c in plan.clips] == [False, True, False, True]
+        assert all(not plan.clips[i].hflip for i in (1, 3))
+        for i in (0, 2):
+            # 无文字片段的翻转由 50% 种子决定，但允许翻转（不强制一定翻）
+            assert plan.clips[i].has_text is False
+
+    def test_list_shorter_than_clips_missing_are_conservative(self):
+        # 列表短于片段数：缺位片段按有文字处理
+        svc = _make_service({"generation_task_id": "t-short"}, clip_has_text=[False])
+        plan = svc._get_micro_transform_plan(3)
+        assert [c.has_text for c in plan.clips] == [False, True, True]
+        assert not plan.clips[1].hflip and not plan.clips[2].hflip
+
+    def test_plan_reproducible_with_real_list(self):
+        cfg = {"generation_task_id": "task-x", "video_index": 1}
+        flags = [False, True, False, False, True]
+        p1 = _make_service(cfg, clip_has_text=flags)._get_micro_transform_plan(5)
+        p2 = _make_service(dict(cfg), clip_has_text=list(flags))._get_micro_transform_plan(5)
+        assert [c.hflip for c in p1.clips] == [c.hflip for c in p2.clips]
+
+
+class TestPureMixedFlags:
+    def test_pure_function_mixed_flags(self):
+        plan = build_micro_transform_plan("seed-1", 0, 4, clip_has_text=[False, True, False, True])
+        assert [c.has_text for c in plan.clips] == [False, True, False, True]
+        # 有文字片段绝不翻转
+        assert not plan.clips[1].hflip and not plan.clips[3].hflip
+
+
+class TestResolveClipHasText:
+    def _adapter(self):
+        from video_processing.render_adapter import RenderAdapter
+
+        return RenderAdapter(MagicMock())
+
+    def test_no_atom_ids_returns_none(self):
+        adapter = self._adapter()
+        clips = [_clip("c1", ""), _clip("c2", "")]
+        assert adapter._resolve_clip_has_text(clips) is None
+
+    def test_explicit_false_only_maps_to_false(self):
+        adapter = self._adapter()
+        clips = [
+            _clip("c1", "a1"),
+            _clip("c2", "a2"),
+            _clip("c3", "a3"),
+            _clip("c4", "a4"),
+            _clip("c5", "a5"),
+        ]
+        atoms = [
+            _atom("a1", {"has_text": False}),  # 明确无文字 → False
+            _atom("a2", {"has_text": True}),  # 有文字
+            _atom("a3", None),  # 标签未生成
+            _atom("a4", {"scene": ["工厂"]}),  # has_text 缺失（null）
+            _atom("a5", {"has_text": "false"}),  # 非布尔 → 保守
+        ]
+        with patch(
+            "packages.adapters.sqlalchemy_impl.asset_atom_clip_repository."
+            "SQLAlchemyAssetAtomClipRepository.find_by_ids",
+            return_value=atoms,
+        ):
+            result = adapter._resolve_clip_has_text(clips)
+        assert result == [False, True, True, True, True]
+
+    def test_audio_clips_excluded_and_order_kept(self):
+        adapter = self._adapter()
+        clips = [
+            _clip("c1", "a1", clip_type="main"),
+            _clip("bgm", "", clip_type="audio"),
+            _clip("c2", "a2", clip_type="pip"),
+        ]
+        atoms = [
+            _atom("a1", {"has_text": False}),
+            _atom("a2", {"has_text": False}),
+        ]
+        with patch(
+            "packages.adapters.sqlalchemy_impl.asset_atom_clip_repository."
+            "SQLAlchemyAssetAtomClipRepository.find_by_ids",
+            return_value=atoms,
+        ) as mock_find:
+            result = adapter._resolve_clip_has_text(clips)
+        # 只查非 audio 片段的 atom id，且顺序为 main → pip
+        assert mock_find.call_args.args[0] == ["a1", "a2"]
+        assert result == [False, False]
+
+    def test_missing_atom_record_defaults_true(self):
+        adapter = self._adapter()
+        clips = [_clip("c1", "a1"), _clip("c2", "a2")]
+        with patch(
+            "packages.adapters.sqlalchemy_impl.asset_atom_clip_repository."
+            "SQLAlchemyAssetAtomClipRepository.find_by_ids",
+            return_value=[_atom("a1", {"has_text": False})],  # a2 查不到
+        ):
+            result = adapter._resolve_clip_has_text(clips)
+        assert result == [False, True]
+
+    def test_query_failure_returns_none(self):
+        adapter = self._adapter()
+        clips = [_clip("c1", "a1")]
+        with patch(
+            "packages.adapters.sqlalchemy_impl.asset_atom_clip_repository."
+            "SQLAlchemyAssetAtomClipRepository.find_by_ids",
+            side_effect=RuntimeError("db down"),
+        ):
+            assert adapter._resolve_clip_has_text(clips) is None
+
+    def test_duplicate_atom_ids_queried_once(self):
+        adapter = self._adapter()
+        clips = [_clip("c1", "a1"), _clip("c2", "a1")]
+        with patch(
+            "packages.adapters.sqlalchemy_impl.asset_atom_clip_repository."
+            "SQLAlchemyAssetAtomClipRepository.find_by_ids",
+            return_value=[_atom("a1", {"has_text": False})],
+        ) as mock_find:
+            result = adapter._resolve_clip_has_text(clips)
+        assert mock_find.call_args.args[0] == ["a1"]
+        assert result == [False, False]

tests/unit/test_1970_micro_transform_pure.py

@@ -0,0 +1,178 @@
+"""#1970 PR2 微变换纯逻辑单元测试。
+
+覆盖：
+- 种子可复现（同 task_id+video_index 跨调用一致；不同 video_index 不同）
+- 6 维参数取值范围（speed 0.97~1.03、色彩 ±0.02、hflip 概率与字幕门控）
+- BGM 偏移 2~8s 与 atrim 片段边界
+- filter 片段格式
+"""
+
+from __future__ import annotations
+
+import random
+
+import pytest
+from video_processing.micro_transform_pure import (
+    BGM_OFFSET_MAX,
+    BGM_OFFSET_MIN,
+    COLOR_DELTA,
+    HFLIP_PROBABILITY,
+    SPEED_MAX,
+    SPEED_MIN,
+    build_bgm_offset_trim,
+    build_micro_transform_plan,
+    make_video_seed,
+)
+
+
+class TestSeed:
+    def test_seed_in_range(self):
+        for i in range(50):
+            s = make_video_seed("task-xyz", i)
+            assert 0 <= s < 10000
+
+    def test_seed_deterministic_across_calls(self):
+        a = make_video_seed("task-1", 2)
+        b = make_video_seed("task-1", 2)
+        assert a == b
+
+    def test_seed_differs_by_task_or_index(self):
+        base = make_video_seed("task-1", 0)
+        assert make_video_seed("task-2", 0) != base or make_video_seed("task-1", 1) != base
+        # 至少 video_index 不同时种子不同（概率上必然，用多组确认）
+        seeds = {make_video_seed("task-fixed", i) for i in range(8)}
+        assert len(seeds) > 1
+
+    def test_empty_task_id_does_not_raise(self):
+        assert 0 <= make_video_seed("", 0) < 10000
+
+
+class TestBuildPlan:
+    def test_zero_clips_plan_has_bgm_offset(self):
+        plan = build_micro_transform_plan("t1", 0, 0)
+        assert plan.clips == []
+        assert BGM_OFFSET_MIN <= plan.bgm_start_offset <= BGM_OFFSET_MAX
+
+    def test_clip_param_ranges(self):
+        plan = build_micro_transform_plan("t-range", 0, 30)
+        assert len(plan.clips) == 30
+        for c in plan.clips:
+            assert SPEED_MIN <= c.speed <= SPEED_MAX
+            assert -COLOR_DELTA - 1e-9 <= c.brightness <= COLOR_DELTA + 1e-9
+            assert 1.0 - COLOR_DELTA - 1e-9 <= c.contrast <= 1.0 + COLOR_DELTA + 1e-9
+            assert 1.0 - COLOR_DELTA - 1e-9 <= c.saturation <= 1.0 + COLOR_DELTA + 1e-9
+
+    def test_plan_reproducible(self):
+        p1 = build_micro_transform_plan("repro", 1, 10)
+        p2 = build_micro_transform_plan("repro", 1, 10)
+        assert [c.speed for c in p1.clips] == [c.speed for c in p2.clips]
+        assert [c.brightness for c in p1.clips] == [c.brightness for c in p2.clips]
+        assert p1.bgm_start_offset == p2.bgm_start_offset
+
+    def test_hflip_disabled_when_no_text_info(self):
+        # clip_has_text=None（P1 保守）：全部按有文字处理，一律不翻转
+        plan = build_micro_transform_plan("t1", 0, 40, clip_has_text=None)
+        assert all(not c.hflip for c in plan.clips)
+        assert all(c.has_text for c in plan.clips)
+
+    def test_hflip_never_on_text_clips(self):
+        # 全部标记有文字：无论如何都不翻转
+        plan = build_micro_transform_plan("t-text", 0, 40, clip_has_text=[True] * 40)
+        assert all(not c.hflip for c in plan.clips)
+
+    def test_hflip_roughly_half_on_clean_clips(self):
+        # 全部无文字：翻转比例应接近 50%（给宽松区间防 flaky）
+        plan = build_micro_transform_plan("t-clean", 0, 2000, clip_has_text=[False] * 2000)
+        flipped = sum(1 for c in plan.clips if c.hflip)
+        ratio = flipped / 2000
+        assert HFLIP_PROBABILITY == 0.5
+        assert 0.40 < ratio < 0.60
+
+    def test_hflip_mixed_text_mask(self):
+        mask = [i % 2 == 0 for i in range(100)]  # 偶数位有文字
+        plan = build_micro_transform_plan("t-mask", 0, 100, clip_has_text=mask)
+        for c in plan.clips:
+            if mask[c.clip_index]:
+                assert not c.hflip
+
+    def test_bgm_offset_disabled(self):
+        plan = build_micro_transform_plan("t1", 0, 5, enable_bgm_offset=False)
+        assert plan.bgm_start_offset == 0.0
+
+    def test_clip_lookup(self):
+        plan = build_micro_transform_plan("t1", 0, 3)
+        assert plan.clip(0) is plan.clips[0]
+        assert plan.clip(2) is plan.clips[2]
+        assert plan.clip(99) is None
+
+
+class TestFilterSuffix:
+    def test_identity_transform_empty_suffix(self):
+        plan = build_micro_transform_plan("t", 0, 1, clip_has_text=[True])
+        c = plan.clips[0]
+        # 强制为恒等参数验证格式
+        object.__setattr__(c, "speed", 1.0)
+        object.__setattr__(c, "brightness", 0.0)
+        object.__setattr__(c, "contrast", 1.0)
+        object.__setattr__(c, "saturation", 1.0)
+        object.__setattr__(c, "hflip", False)
+        assert c.video_filter_suffix() == ""
+        assert c.audio_filter_suffix() == ""
+
+    def test_video_filter_order_speed_hflip_eq(self):
+        plan = build_micro_transform_plan("t", 0, 1, clip_has_text=[False])
+        c = plan.clips[0]
+        object.__setattr__(c, "speed", 1.02)
+        object.__setattr__(c, "hflip", True)
+        object.__setattr__(c, "has_text", False)
+        object.__setattr__(c, "brightness", 0.01)
+        suffix = c.video_filter_suffix()
+        steps = suffix.split(",")
+        assert steps[0].startswith("setpts=")
+        assert steps[1] == "hflip"
+        assert steps[2].startswith("eq=brightness=")
+
+    def test_hflip_blocked_by_text_in_suffix(self):
+        plan = build_micro_transform_plan("t", 0, 1)
+        c = plan.clips[0]
+        object.__setattr__(c, "hflip", True)
+        object.__setattr__(c, "has_text", True)
+        assert "hflip" not in c.video_filter_suffix()
+
+    def test_audio_suffix_only_for_speed(self):
+        plan = build_micro_transform_plan("t", 0, 1)
+        c = plan.clips[0]
+        object.__setattr__(c, "speed", 0.98)
+        assert c.audio_filter_suffix() == "atempo=0.98000"
+        object.__setattr__(c, "speed", 1.0)
+        assert c.audio_filter_suffix() == ""
+
+
+class TestBgmTrim:
+    def test_normal_offset(self):
+        assert build_bgm_offset_trim(3.0, 30.0) == "atrim=start=3.000,"
+
+    def test_zero_or_negative(self):
+        assert build_bgm_offset_trim(0.0, 30.0) == ""
+        assert build_bgm_offset_trim(-1.0, 30.0) == ""
+
+    def test_offset_near_end_falls_back(self):
+        # 距尾部不足 0.5s → 空串
+        assert build_bgm_offset_trim(29.7, 30.0) == ""
+
+    def test_invalid_duration(self):
+        assert build_bgm_offset_trim(3.0, 0.0) == ""
+
+
+class TestDistributionSanity:
+    def test_speed_distribution_spans_range(self):
+        # 多片段采样确认速度在全区间有分布（非常量）
+        plan = build_micro_transform_plan("t-dist", 0, 500)
+        speeds = [c.speed for c in plan.clips]
+        assert min(speeds) < 0.99
+        assert max(speeds) > 1.01
+
+    def test_bgm_offset_range_many_seeds(self):
+        for i in range(100):
+            plan = build_micro_transform_plan("t", i, 1)
+            assert BGM_OFFSET_MIN <= plan.bgm_start_offset <= BGM_OFFSET_MAX

tests/unit/test_1970_micro_transform_render.py

@@ -0,0 +1,198 @@
+"""#1970 PR2 渲染服务微变换注入测试。
+
+不做真实渲染，只验证 UnifiedRenderService 上微变换计划的开关、缓存、
+滤镜注入与速度因子；纯参数生成在 test_1970_micro_transform_pure 覆盖。
+"""
+
+from __future__ import annotations
+
+from pathlib import Path
+from unittest.mock import MagicMock
+
+import pytest
+
+
+def _make_service(plan_config: dict | None = None, clips=None):
+    from video_processing.unified_render_service import UnifiedRenderService
+
+    svc = object.__new__(UnifiedRenderService)
+    svc.plan = MagicMock()
+    svc.plan.config = plan_config or {}
+    svc.plan.id = "plan-1"
+    svc.plan.clips = clips or []
+    svc._micro_plan_cache = None
+    svc._micro_plan_loaded = False
+    svc._clip_has_text = None
+    return svc
+
+
+class TestDedupGate:
+    def test_default_enabled_when_config_missing(self):
+        svc = _make_service({})
+        assert svc._dedup_enabled() is True
+
+    def test_explicit_true(self):
+        svc = _make_service({"dedup_enabled": True})
+        assert svc._dedup_enabled() is True
+
+    def test_explicit_false(self):
+        svc = _make_service({"dedup_enabled": False})
+        assert svc._dedup_enabled() is False
+
+    def test_plan_none_config_treated_enabled(self):
+        svc = _make_service(None)
+        svc.plan.config = None
+        assert svc._dedup_enabled() is True
+
+
+class TestPlanBuild:
+    def test_disabled_returns_none_and_cached(self):
+        svc = _make_service({"dedup_enabled": False, "generation_task_id": "t1"})
+        assert svc._get_micro_transform_plan(5) is None
+        # 第二次走缓存
+        svc._dedup_enabled = MagicMock(side_effect=AssertionError("不应再次计算"))
+        assert svc._get_micro_transform_plan(5) is None
+
+    def test_zero_clips_returns_none(self):
+        svc = _make_service({"generation_task_id": "t1"})
+        assert svc._get_micro_transform_plan(0) is None
+
+    def test_enabled_builds_reproducible_plan(self):
+        cfg = {"generation_task_id": "task-abc", "video_index": 2, "bgm": {"enabled": True}}
+        svc1 = _make_service(cfg)
+        svc2 = _make_service(dict(cfg))
+        p1 = svc1._get_micro_transform_plan(6)
+        p2 = svc2._get_micro_transform_plan(6)
+        assert p1 is not None and p2 is not None
+        assert [c.speed for c in p1.clips] == [c.speed for c in p2.clips]
+        assert p1.seed == p2.seed
+        assert len(p1.clips) == 6
+
+    def test_p1_conservative_no_hflip(self):
+        svc = _make_service({"generation_task_id": "t1"})
+        plan = svc._get_micro_transform_plan(30)
+        assert all(not c.hflip for c in plan.clips)
+
+    def test_no_bgm_config_zero_offset(self):
+        svc = _make_service({"generation_task_id": "t1"})
+        plan = svc._get_micro_transform_plan(3)
+        assert plan.bgm_start_offset == 0.0
+
+    def test_bgm_enabled_offset_in_range(self):
+        svc = _make_service({"generation_task_id": "t1", "bgm": {"enabled": True}})
+        plan = svc._get_micro_transform_plan(3)
+        assert 2.0 <= plan.bgm_start_offset <= 8.0
+
+
+class TestFilterInjection:
+    def test_none_mt_noop(self):
+        svc = _make_service({})
+        from video_processing.unified_render_service import UnifiedRenderService
+
+        filters = ["scale=100:100"]
+        UnifiedRenderService._apply_micro_transform_video(filters, None)
+        UnifiedRenderService._apply_micro_hflip(filters, None)
+        assert filters == ["scale=100:100"]
+
+    def test_eq_injection(self):
+        svc = _make_service({"generation_task_id": "t1"})
+        plan = svc._get_micro_transform_plan(1)
+        mt = plan.clips[0]
+        from video_processing.unified_render_service import UnifiedRenderService
+
+        filters: list[str] = []
+        UnifiedRenderService._apply_micro_transform_video(filters, mt)
+        assert filters and filters[0].startswith("eq=brightness=")
+        assert "contrast=" in filters[0] and "saturation=" in filters[0]
+
+    def test_hflip_skipped_p1(self):
+        svc = _make_service({"generation_task_id": "t1"})
+        plan = svc._get_micro_transform_plan(10)
+        from video_processing.unified_render_service import UnifiedRenderService
+
+        for mt in plan.clips:
+            filters: list[str] = []
+            UnifiedRenderService._apply_micro_hflip(filters, mt)
+            assert filters == []
+
+    def test_speed_factor(self):
+        from video_processing.micro_transform_pure import ClipMicroTransform
+        from video_processing.unified_render_service import UnifiedRenderService
+
+        assert UnifiedRenderService._micro_speed_factor(None) == 1.0
+        assert UnifiedRenderService._micro_speed_factor(ClipMicroTransform(0, speed=1.025)) == pytest.approx(1.025)
+        assert UnifiedRenderService._micro_speed_factor(MagicMock(speed=0.97)) == pytest.approx(0.97)
+
+    def test_bgm_offset_reader_respects_flag(self):
+        svc_off = _make_service({"dedup_enabled": False})
+        assert svc_off._get_micro_bgm_offset() == 0.0
+
+        svc_on = _make_service({"generation_task_id": "t1", "bgm": {"enabled": True}}, clips=[MagicMock()])
+        off = svc_on._get_micro_bgm_offset()
+        assert 2.0 <= off <= 8.0
+
+    def test_bgm_offset_zero_without_bgm(self):
+        svc = _make_service({"generation_task_id": "t1"}, clips=[MagicMock()])
+        assert svc._get_micro_bgm_offset() == 0.0
+
+
+class TestStreamCopyGate:
+    """dedup 开启时微变换需要重编码，stream copy 必须被拒绝。"""
+
+    def _build(self, config):
+        from types import SimpleNamespace
+        from unittest.mock import patch
+
+        from video_processing.unified_render_service import ResolvedClip, UnifiedRenderService
+
+        source = SimpleNamespace(
+            id="c1",
+            clip_type="main",
+        )
+        svc = object.__new__(UnifiedRenderService)
+        svc.output_width = 1280
+        svc.output_height = 720
+        svc.output_fps = 25
+        svc.plan = MagicMock()
+        svc.plan.id = "plan-1"
+        svc.plan.config = config
+        svc.plan.clips = [source]
+        svc.clips = [source]
+        svc._micro_plan_cache = None
+        svc._micro_plan_loaded = False
+        svc._clip_has_text = None
+        resolved = ResolvedClip(
+            clip_id="c1",
+            asset_id="a1",
+            local_path=Path("/tmp/a1.mp4"),
+            clip_type="main",
+            order=0,
+        )
+        info = {
+            "width": 1280,
+            "height": 720,
+            "fps": 25.0,
+            "video_codec": "h264",
+            "pix_fmt": "yuv420p",
+            "duration": 5.0,
+            "has_audio": True,
+            "audio_codec": "aac",
+        }
+        return svc, resolved, info
+
+    def test_dedup_enabled_blocks_stream_copy(self):
+        from unittest.mock import patch
+
+        svc, resolved, info = self._build({"dedup_enabled": True, "generation_task_id": "t1"})
+        with patch("video_processing.unified_render_service.probe_video_info", return_value=info):
+            can_copy, reason = svc._can_use_stream_copy(resolved)
+        assert can_copy is False
+        assert "微变换" in reason
+
+    def test_dedup_disabled_allows_stream_copy(self):
+        from unittest.mock import patch
+
+        svc, resolved, info = self._build({"dedup_enabled": False})
+        with patch("video_processing.unified_render_service.probe_video_info", return_value=info):
+            can_copy, _ = svc._can_use_stream_copy(resolved)
+        assert can_copy is True

tests/unit/test_1970_narrative_clip_weighted.py

@@ -0,0 +1,306 @@
+"""#1970 P2 叙事匹配 AI 标签加权测试。
+
+测试范围：
+- AI 标签命中时权重 2.0
+- 无 AI 标签时降级到素材标签权重 1.0
+- 混合场景（部分素材有 AI 标签，部分只有素材标签）
+- compute_tag_match_score 归一化得分
+"""
+
+from __future__ import annotations
+
+import datetime as dt
+import random
+from dataclasses import dataclass, field
+
+import pytest
+
+from packages.domain.narrative_match import (
+    AI_TAG_WEIGHT,
+    ASSET_TAG_WEIGHT,
+    _compute_ai_score,
+    _extract_ai_tag_names,
+    compute_tag_match_score,
+    match_assets_by_script_tags,
+    pick_narrative_assets,
+)
+
+
+@dataclass
+class FakeAsset:
+    id: str
+    tag_ids: list[str] = field(default_factory=list)
+    tags: list[str] = field(default_factory=list)
+    status: str = "ready"
+    file_type: str = "video"
+    duration: float = 10.0
+    quality_score: float | None = None
+    created_at: object = None
+    metadata: dict = field(default_factory=dict)
+
+
+def _make_old_dt():
+    return dt.datetime(2020, 1, 1, tzinfo=dt.UTC)
+
+
+# ── _extract_ai_tag_names ─────────────────────────────────────────────────
+
+
+class TestExtractAiTagNames:
+    def test_extracts_all_keys(self):
+        ai_tags = {
+            "scene": ["工厂", "车间"],
+            "objects": ["产品"],
+            "action": ["演示"],
+            "shot": "特写",  # shot 不参与标签匹配
+            "has_text": False,
+        }
+        names = _extract_ai_tag_names(ai_tags)
+        assert names == {"工厂", "车间", "产品", "演示"}
+
+    def test_empty_dict(self):
+        assert _extract_ai_tag_names({}) == set()
+
+    def test_none_values(self):
+        ai_tags = {"scene": None, "objects": None, "action": None}
+        assert _extract_ai_tag_names(ai_tags) == set()
+
+    def test_case_insensitive(self):
+        ai_tags = {"scene": ["Factory"], "objects": [], "action": []}
+        names = _extract_ai_tag_names(ai_tags)
+        assert "factory" in names
+
+
+# ── _compute_ai_score ─────────────────────────────────────────────────────
+
+
+class TestComputeAiScore:
+    def test_single_clip_hit(self):
+        wanted = {"工厂", "演示"}
+        clips = [{"scene": ["工厂"], "objects": [], "action": ["演示"]}]
+        score = _compute_ai_score("a1", wanted, {"a1": clips})
+        # 命中 2 个 × 2.0 = 4.0
+        assert score == 2 * AI_TAG_WEIGHT
+
+    def test_multiple_clips_takes_best(self):
+        wanted = {"工厂", "演示"}
+        clips = [
+            {"scene": ["工厂"], "objects": [], "action": []},  # 1 hit = 2.0
+            {"scene": ["工厂"], "objects": [], "action": ["演示"]},  # 2 hits = 4.0
+        ]
+        score = _compute_ai_score("a1", wanted, {"a1": clips})
+        assert score == 2 * AI_TAG_WEIGHT  # best = 2 hits
+
+    def test_no_match(self):
+        wanted = {"美食"}
+        clips = [{"scene": ["工厂"], "objects": [], "action": ["演示"]}]
+        score = _compute_ai_score("a1", wanted, {"a1": clips})
+        assert score == 0.0
+
+    def test_no_clips_for_asset(self):
+        wanted = {"工厂"}
+        assert _compute_ai_score("a1", wanted, {}) == 0.0
+        assert _compute_ai_score("a1", wanted, None) == 0.0
+
+    def test_empty_wanted(self):
+        clips = [{"scene": ["工厂"], "objects": [], "action": []}]
+        assert _compute_ai_score("a1", set(), {"a1": clips}) == 0.0
+
+
+# ── match_assets_by_script_tags with AI tags ──────────────────────────────
+
+
+class TestMatchWithAiTags:
+    def test_ai_tag_hit_puts_in_matched(self):
+        """有 AI 标签命中 → 进入命中池."""
+        assets = [FakeAsset("a1", created_at=_make_old_dt())]
+        clip_ai_tags = {"a1": [{"scene": ["工厂"], "objects": [], "action": []}]}
+
+        matched, unmatched = match_assets_by_script_tags(
+            assets,
+            script_tags=["工厂"],
+            clip_ai_tags_by_asset=clip_ai_tags,
+        )
+
+        assert [a.id for a in matched] == ["a1"]
+        assert unmatched == []
+
+    def test_ai_tag_no_match_puts_in_unmatched(self):
+        """AI 标签未命中 → 进入未命中池."""
+        assets = [FakeAsset("a1", created_at=_make_old_dt())]
+        clip_ai_tags = {"a1": [{"scene": ["办公室"], "objects": [], "action": []}]}
+
+        matched, unmatched = match_assets_by_script_tags(
+            assets,
+            script_tags=["工厂"],
+            clip_ai_tags_by_asset=clip_ai_tags,
+        )
+
+        assert matched == []
+        assert [a.id for a in unmatched] == ["a1"]
+
+    def test_asset_tag_still_works_without_ai_tags(self):
+        """无 AI 标签时，素材标签仍按权重 1.0 匹配."""
+        assets = [FakeAsset("a1", tags=["工厂"], created_at=_make_old_dt())]
+
+        matched, unmatched = match_assets_by_script_tags(
+            assets,
+            script_tags=["工厂"],
+        )
+
+        assert [a.id for a in matched] == ["a1"]
+
+    def test_mixed_ai_and_asset_tags(self):
+        """混合场景：一个素材有 AI 标签，另一个只有素材标签."""
+        assets = [
+            FakeAsset("a1", created_at=_make_old_dt()),  # AI 标签命中
+            FakeAsset("a2", tags=["工厂"], created_at=_make_old_dt()),  # 素材标签命中
+            FakeAsset("a3", tags=["美食"], created_at=_make_old_dt()),  # 无命中
+        ]
+        clip_ai_tags = {"a1": [{"scene": ["工厂"], "objects": [], "action": []}]}
+
+        matched, unmatched = match_assets_by_script_tags(
+            assets,
+            script_tags=["工厂"],
+            clip_ai_tags_by_asset=clip_ai_tags,
+        )
+
+        assert {a.id for a in matched} == {"a1", "a2"}
+        assert [a.id for a in unmatched] == ["a3"]
+
+    def test_ai_tag_and_asset_tag_both_hit(self):
+        """同一素材 AI 标签和素材标签都命中 → 仍在命中池."""
+        assets = [FakeAsset("a1", tags=["工厂"], created_at=_make_old_dt())]
+        clip_ai_tags = {"a1": [{"scene": ["工厂"], "objects": [], "action": []}]}
+
+        matched, unmatched = match_assets_by_script_tags(
+            assets,
+            script_tags=["工厂"],
+            tag_names_by_id={"a1": ["工厂"]},
+            clip_ai_tags_by_asset=clip_ai_tags,
+        )
+
+        assert [a.id for a in matched] == ["a1"]
+
+
+# ── compute_tag_match_score ───────────────────────────────────────────────
+
+
+class TestComputeTagMatchScore:
+    def test_ai_only_score(self):
+        """仅 AI 标签命中."""
+        clip_ai_tags = {"a1": [{"scene": ["工厂"], "objects": [], "action": ["演示"]}]}
+        score = compute_tag_match_score(
+            "a1",
+            script_tags=["工厂", "演示"],
+            clip_ai_tags_by_asset=clip_ai_tags,
+        )
+        # AI: 2 hits × 2.0 = 4.0; asset: 0; max = 2 × 3.0 = 6.0
+        assert abs(score - 4.0 / 6.0) < 0.01
+
+    def test_asset_only_score(self):
+        """仅素材标签命中."""
+        score = compute_tag_match_score(
+            "a1",
+            script_tags=["工厂", "演示"],
+            tag_names_by_id={"a1": ["工厂"]},
+        )
+        # AI: 0; asset: 1 hit × 1.0 = 1.0; max = 2 × 3.0 = 6.0
+        assert abs(score - 1.0 / 6.0) < 0.01
+
+    def test_both_ai_and_asset_score(self):
+        """AI 标签 + 素材标签同时命中."""
+        clip_ai_tags = {"a1": [{"scene": ["工厂"], "objects": [], "action": []}]}
+        score = compute_tag_match_score(
+            "a1",
+            script_tags=["工厂", "演示"],
+            tag_names_by_id={"a1": ["工厂"]},
+            clip_ai_tags_by_asset=clip_ai_tags,
+        )
+        # AI: 1 hit × 2.0 = 2.0; asset: 1 hit × 1.0 = 1.0; max = 2 × 3.0 = 6.0
+        assert abs(score - 3.0 / 6.0) < 0.01
+
+    def test_no_match_score_zero(self):
+        """无命中 → 得分 0."""
+        score = compute_tag_match_score(
+            "a1",
+            script_tags=["工厂"],
+            tag_names_by_id={"a1": ["美食"]},
+        )
+        assert score == 0.0
+
+    def test_full_match_score_one(self):
+        """全命中 → 得分接近 1.0."""
+        clip_ai_tags = {"a1": [{"scene": ["工厂"], "objects": ["产品"], "action": ["演示"]}]}
+        score = compute_tag_match_score(
+            "a1",
+            script_tags=["工厂", "产品", "演示"],
+            clip_ai_tags_by_asset=clip_ai_tags,
+        )
+        # AI: 3 hits × 2.0 = 6.0; max = 3 × 3.0 = 9.0 → 6/9 = 0.667
+        # 注意：仅 AI 标签命中不可能达到 1.0（因为 max 包含素材权重）
+        assert score > 0.5
+
+    def test_empty_script_tags(self):
+        """空文案标签 → 得分 0."""
+        assert compute_tag_match_score("a1", script_tags=[]) == 0.0
+
+
+# ── pick_narrative_assets with AI tags ────────────────────────────────────
+
+
+class TestPickNarrativeWithAiTags:
+    def _assets(self):
+        old = _make_old_dt()
+        return [
+            FakeAsset("ai_match", created_at=old),  # AI 标签命中
+            FakeAsset("asset_match", tags=["工厂"], created_at=old),  # 素材标签命中
+            FakeAsset("no_match", tags=["美食"], created_at=old),  # 无命中
+        ]
+
+    def test_ai_match_prioritized(self):
+        """AI 标签命中的素材进入命中池."""
+        clip_ai_tags = {"ai_match": [{"scene": ["工厂"], "objects": [], "action": []}]}
+
+        picked = pick_narrative_assets(
+            self._assets(),
+            script_tags=["工厂"],
+            clip_ai_tags_by_asset=clip_ai_tags,
+            limit=2,
+            rng=random.Random(0),
+        )
+
+        ids = {a.id for a in picked}
+        assert "ai_match" in ids
+        assert "asset_match" in ids
+
+    def test_fallback_when_no_ai_match(self):
+        """AI 标签和素材标签都未命中 → 降级."""
+        clip_ai_tags = {"ai_match": [{"scene": ["办公室"], "objects": [], "action": []}]}
+
+        picked = pick_narrative_assets(
+            self._assets(),
+            script_tags=["不存在"],
+            clip_ai_tags_by_asset=clip_ai_tags,
+            limit=2,
+            rng=random.Random(0),
+        )
+
+        assert len(picked) == 2  # 从全量中选取
+
+    def test_backward_compat_without_ai_tags(self):
+        """不传 clip_ai_tags_by_asset 时行为与之前完全一致."""
+        picked = pick_narrative_assets(
+            self._assets(),
+            script_tags=["工厂"],
+            limit=2,
+            rng=random.Random(0),
+        )
+
+        # 仅素材标签匹配
+        ids = {a.id for a in picked}
+        assert "asset_match" in ids
+
+
+if __name__ == "__main__":
+    pytest.main([__file__, "-q"])

tests/unit/test_1970_narrative_match.py

@@ -0,0 +1,167 @@
+"""#1970 PR3 叙事模式文案标签匹配纯函数测试。"""
+
+from __future__ import annotations
+
+import random
+from dataclasses import dataclass, field
+
+import pytest
+
+from packages.domain.narrative_match import (
+    build_asset_tag_name_index,
+    match_assets_by_script_tags,
+    normalize_tag,
+    pick_narrative_assets,
+)
+
+
+@dataclass
+class FakeAsset:
+    id: str
+    tag_ids: list[str] = field(default_factory=list)
+    tags: list[str] = field(default_factory=list)
+    status: str = "ready"
+    file_type: str = "video"
+    duration: float = 10.0
+    quality_score: float | None = None
+    created_at: object = None
+    metadata: dict = field(default_factory=dict)
+
+
+# ── normalize_tag ──────────────────────────────────────────────────────────
+
+
+class TestNormalizeTag:
+    def test_strip_and_lower(self):
+        assert normalize_tag("  带货 ") == "带货"
+        assert normalize_tag("Factory") == "factory"
+
+    def test_none_and_non_string(self):
+        assert normalize_tag(None) == ""
+        assert normalize_tag(123) == "123"
+
+    def test_short_tag_filtered_by_normalize_set(self):
+        # 单字噪声标签不参与匹配（_normalize_tags 层过滤）
+        from packages.domain.narrative_match import _normalize_tags
+
+        assert _normalize_tags(["的", " a ", "工厂"]) == {"工厂"}
+
+
+# ── match_assets_by_script_tags ────────────────────────────────────────────
+
+
+class TestMatchSplit:
+    def test_split_by_tag_names(self):
+        assets = [
+            FakeAsset("a1", tags=["工厂"]),
+            FakeAsset("a2", tags=["旅游"]),
+            FakeAsset("a3", tags=["工厂", "车间"]),
+        ]
+        matched, unmatched = match_assets_by_script_tags(assets, script_tags=["工厂"])
+        assert [a.id for a in matched] == ["a1", "a3"]
+        assert [a.id for a in unmatched] == ["a2"]
+
+    def test_case_insensitive(self):
+        assets = [FakeAsset("a1", tags=["Factory"])]
+        matched, unmatched = match_assets_by_script_tags(assets, script_tags=["FACTORY"])
+        assert [a.id for a in matched] == ["a1"]
+        assert unmatched == []
+
+    def test_tag_ids_via_name_index(self):
+        assets = [FakeAsset("a1", tag_ids=["t1"]), FakeAsset("a2", tag_ids=["t2"])]
+        index = {"a1": ["测评"], "a2": ["vlog"]}
+        matched, unmatched = match_assets_by_script_tags(assets, script_tags=["测评"], tag_names_by_id=index)
+        assert [a.id for a in matched] == ["a1"]
+        assert [a.id for a in unmatched] == ["a2"]
+
+    def test_empty_script_tags_degrades_all_unmatched(self):
+        assets = [FakeAsset("a1", tags=["工厂"])]
+        matched, unmatched = match_assets_by_script_tags(assets, script_tags=[])
+        assert matched == []
+        assert [a.id for a in unmatched] == ["a1"]
+
+    def test_no_match_degrades(self):
+        assets = [FakeAsset("a1", tags=["工厂"]), FakeAsset("a2", tags=["车间"])]
+        matched, unmatched = match_assets_by_script_tags(assets, script_tags=["美食"])
+        assert matched == []
+        assert {a.id for a in unmatched} == {"a1", "a2"}
+
+    def test_order_preserved(self):
+        assets = [FakeAsset(f"a{i}", tags=["x" if i % 2 else "工厂"]) for i in range(6)]
+        matched, _ = match_assets_by_script_tags(assets, script_tags=["工厂"])
+        assert [a.id for a in matched] == ["a0", "a2", "a4"]
+
+    def test_build_index_ignores_blank(self):
+        # 空白/None/单字符噪声标签均不参与匹配
+        idx = build_asset_tag_name_index({"a1": [" 工厂 ", "", None, "A"]})
+        assert idx == {"a1": {"工厂"}}
+
+
+# ── pick_narrative_assets ──────────────────────────────────────────────────
+
+
+class TestPickNarrativeAssets:
+    def _assets(self):
+        # smart_match 需要 created_at（None 走 recency 兜底）
+        import datetime as dt
+
+        old = dt.datetime(2020, 1, 1, tzinfo=dt.UTC)
+        return [
+            FakeAsset("match1", tags=["工厂"], created_at=old),
+            FakeAsset("nomatch1", tags=["旅游"], created_at=old),
+            FakeAsset("match2", tags=["工厂"], created_at=old),
+            FakeAsset("nomatch2", tags=["美食"], created_at=old),
+        ]
+
+    def test_matched_pool_prioritized(self):
+        picked = pick_narrative_assets(self._assets(), script_tags=["工厂"], limit=2, rng=random.Random(0))
+        assert {a.id for a in picked} <= {"match1", "match2"}
+        assert all(a.id.startswith("match") for a in picked)
+
+    def test_fallback_fills_from_unmatched(self):
+        picked = pick_narrative_assets(self._assets(), script_tags=["工厂"], limit=4, rng=random.Random(0))
+        ids = {a.id for a in picked}
+        assert ids == {"match1", "match2", "nomatch1", "nomatch2"}
+        # 命中池排在前面
+        assert picked[0].id.startswith("match")
+        assert picked[1].id.startswith("match")
+
+    def test_no_tag_match_equals_random_selection(self):
+        assets = self._assets()
+        picked = pick_narrative_assets(assets, script_tags=["不存在"], limit=3, rng=random.Random(42))
+        assert len(picked) == 3
+
+    def test_empty_tags_selects_all_pool(self):
+        assets = self._assets()
+        picked = pick_narrative_assets(assets, script_tags=[], limit=None, rng=random.Random(1))
+        assert len(picked) == 4
+
+    def test_limit_none_returns_all_with_matched_first(self):
+        picked = pick_narrative_assets(self._assets(), script_tags=["工厂"], limit=None, rng=random.Random(1))
+        assert len(picked) == 4
+        assert {a.id for a in picked[:2]} == {"match1", "match2"}
+
+    def test_tag_ids_index_path(self):
+        assets = [FakeAsset("a1", tag_ids=["t1"]), FakeAsset("a2", tag_ids=["t2"])]
+        # 补 created_at
+        import datetime as dt
+
+        for a in assets:
+            a.created_at = dt.datetime(2020, 1, 1, tzinfo=dt.UTC)
+        picked = pick_narrative_assets(
+            assets,
+            script_tags=["教程"],
+            tag_names_by_id={"a1": ["教程"], "a2": ["旅游"]},
+            limit=1,
+            rng=random.Random(0),
+        )
+        assert [a.id for a in picked] == ["a1"]
+
+    def test_deterministic_with_seed(self):
+        r1 = pick_narrative_assets(self._assets(), script_tags=["工厂"], limit=4, rng=random.Random(7))
+        r2 = pick_narrative_assets(self._assets(), script_tags=["工厂"], limit=4, rng=random.Random(7))
+        assert [a.id for a in r1] == [a.id for a in r2]
+
+
+if __name__ == "__main__":
+    pytest.main([__file__, "-q"])

tests/unit/test_1970_narrative_service.py

@@ -0,0 +1,454 @@
+"""#1970 PR3 叙事前置服务 narrative_service 单元测试（不依赖真实 PG/OSS/CosyVoice）。"""
+
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from types import SimpleNamespace
+from typing import Any
+
+import pytest
+
+from apps.api.app.services import narrative_service as ns
+from apps.api.app.services.narrative_service import (
+    NarrativeError,
+    _resolve_voice,
+    _save_tts_job_as_voice_asset,
+    prepare_narrative_voice,
+)
+from packages.adapters.sqlalchemy_impl.models import ScriptModel
+from packages.domain.tts_job import TTSJob, TTSJobStatus
+
+# ── fakes ──────────────────────────────────────────────────────────────────
+
+
+@dataclass
+class FakeProfile:
+    id: str = "prof-1"
+    user_id: str = "u1"
+    voice_id: str = "cv-voice-1"
+
+
+class FakeCloneRepo:
+    def __init__(self, profile: FakeProfile | None = None):
+        self._profile = profile
+
+    def get(self, pid: str) -> FakeProfile | None:
+        if self._profile and self._profile.id == pid:
+            return self._profile
+        return None
+
+
+class FakeQuery:
+    def __init__(self, script: ScriptModel | None):
+        self._script = script
+
+    def filter(self, *conditions):
+        # 服务端写 filter(...).filter(...) 链式调用；归属/ID 已在 FakeDb 构造时过滤
+        return self
+
+    def first(self):
+        return self._script
+
+
+class FakeDb:
+    def __init__(self, script: ScriptModel | None, *, current_user: str = "u1", query_script_id: str = "script-1"):
+        self._script = script
+        self._current_user = current_user
+        self._query_script_id = query_script_id
+
+    def query(self, model):
+        visible = self._script
+        if visible is not None and (visible.user_id != self._current_user or visible.id != self._query_script_id):
+            visible = None
+        return FakeQuery(visible)
+
+
+def _make_script(*, user_id: str = "u1", content: str = "这是一段口播文案", title: str = "测试文案", tags=None):
+    return ScriptModel(
+        id="script-1",
+        user_id=user_id,
+        title=title,
+        content=content,
+        segments=[],
+        tags=tags if tags is not None else ["带货"],
+    )
+
+
+@dataclass
+class FakeLibrary:
+    id: str = "lib-voice"
+    project_id: str = "p1"
+    kind: Any = field(default_factory=lambda: SimpleNamespace(value="voice"))
+
+
+@dataclass
+class FakeProject:
+    id: str = "p1"
+
+
+class FakeProjectRepo:
+    def __init__(self, projects=None):
+        self._projects = projects if projects is not None else [FakeProject()]
+
+    def find_accessible_projects(self, user_id):
+        return self._projects
+
+
+class FakeLibraryRepo:
+    def __init__(self, libs=None):
+        self._libs = libs if libs is not None else [FakeLibrary()]
+        self.created: list = []
+
+    def find_by_project(self, project_id):
+        return list(self._libs)
+
+    def create(self, library):
+        self.created.append(library)
+        return library
+
+
+@dataclass
+class FakeAsset:
+    id: str = "asset-new"
+    duration: float | None = 12.0
+
+
+class FakeAssetRepo:
+    def __init__(self):
+        self.created: list = []
+
+    def create(self, asset):
+        wrapped = FakeAsset(id="asset-new", duration=getattr(asset, "duration", None))
+        self.created.append(asset)
+        return wrapped
+
+
+class FakeStorage:
+    def __init__(self, *, fail_download: bool = False):
+        self.fail_download = fail_download
+        self.uploaded: list = []
+
+    def download_asset(self, source, dest_path) -> bool:
+        if self.fail_download:
+            return False
+        dest_path.write_bytes(b"FAKEAUDIO")
+        return True
+
+    def upload_file(self, path, key, content_type="", **kwargs):
+        self.uploaded.append((key, content_type))
+
+    def delete_file(self, key):
+        pass
+
+
+class FakeTTSRepo:
+    def __init__(self, job: TTSJob):
+        self.job = job
+        self.saved: list[TTSJob] = []
+
+    def create(self, job: TTSJob) -> TTSJob:
+        self.saved.append(job)
+        self.job = job
+        return job
+
+    def update(self, job: TTSJob) -> TTSJob:
+        self.job = job
+        return job
+
+    def get(self, job_id: str) -> TTSJob | None:
+        return self.job if self.job.id == job_id else None
+
+
+class FakeCosyVoice:
+    pass
+
+
+def _make_completed_job() -> TTSJob:
+    job = TTSJob.create(
+        user_id="u1",
+        input_text="这是一段口播文案",
+        voice_id="cv-voice-1",
+        voice_clone_profile_id="",
+        format="mp3",
+        sample_rate=22050,
+    )
+    job.mark_processing()
+    job.mark_completed(
+        output_audio_url="https://oss/tts/output/job-1.mp3",
+        output_audio_key="tts/output/job-1.mp3",
+        duration=12.5,
+    )
+    return job
+
+
+# ── _resolve_voice ─────────────────────────────────────────────────────────
+
+
+class TestResolveVoice:
+    def test_preset_returns_id_directly_when_no_profile(self):
+        voice_id, clone_id = _resolve_voice(
+            user_id="u1",
+            tts_voice_id="longxiaochun",
+            tts_voice_source="preset",
+            voice_clone_repository=FakeCloneRepo(None),
+        )
+        assert voice_id == "longxiaochun"
+        assert clone_id == ""
+
+    def test_preset_id_that_is_clone_profile_uuid_resolves(self):
+        repo = FakeCloneRepo(FakeProfile())
+        voice_id, clone_id = _resolve_voice(
+            user_id="u1",
+            tts_voice_id="prof-1",
+            tts_voice_source="preset",
+            voice_clone_repository=repo,
+        )
+        assert voice_id == "cv-voice-1"
+        assert clone_id == "prof-1"
+
+    def test_clone_source(self):
+        voice_id, clone_id = _resolve_voice(
+            user_id="u1",
+            tts_voice_id="prof-1",
+            tts_voice_source="clone",
+            voice_clone_repository=FakeCloneRepo(FakeProfile()),
+        )
+        assert voice_id == "cv-voice-1"
+        assert clone_id == "prof-1"
+
+    def test_clone_missing_404(self):
+        with pytest.raises(NarrativeError) as ei:
+            _resolve_voice(
+                user_id="u1",
+                tts_voice_id="nope",
+                tts_voice_source="clone",
+                voice_clone_repository=FakeCloneRepo(None),
+            )
+        assert ei.value.status_code == 404
+
+    def test_clone_other_user_403(self):
+        repo = FakeCloneRepo(FakeProfile(user_id="someone-else"))
+        with pytest.raises(NarrativeError) as ei:
+            _resolve_voice(
+                user_id="u1",
+                tts_voice_id="prof-1",
+                tts_voice_source="clone",
+                voice_clone_repository=repo,
+            )
+        assert ei.value.status_code == 403
+
+    def test_clone_not_ready_400(self):
+        repo = FakeCloneRepo(FakeProfile(voice_id=""))
+        with pytest.raises(NarrativeError) as ei:
+            _resolve_voice(
+                user_id="u1",
+                tts_voice_id="prof-1",
+                tts_voice_source="clone",
+                voice_clone_repository=repo,
+            )
+        assert ei.value.status_code == 400
+
+
+# ── save asset ─────────────────────────────────────────────────────────────
+
+
+class TestSaveVoiceAsset:
+    def _deps(self, **storage_kw):
+        return dict(
+            user_id="u1",
+            name="测试配音",
+            project_repository=FakeProjectRepo(),
+            asset_library_repository=FakeLibraryRepo(),
+            asset_repository=FakeAssetRepo(),
+            storage_service=FakeStorage(**storage_kw),
+        )
+
+    def test_save_creates_asset(self):
+        job = _make_completed_job()
+        deps = self._deps()
+        asset = _save_tts_job_as_voice_asset(job=job, **deps)
+        assert asset.id == "asset-new"
+        assert deps["asset_repository"].created[0].mime_type == "audio/mpeg"
+        assert deps["storage_service"].uploaded[0][0] == "uploads/voice/tts/" + job.id + ".mp3"
+
+    def test_no_project_raises(self):
+        job = _make_completed_job()
+        deps = self._deps()
+        deps["project_repository"] = FakeProjectRepo(projects=[])
+        with pytest.raises(NarrativeError):
+            _save_tts_job_as_voice_asset(job=job, **deps)
+
+    def test_download_fail_raises_502(self):
+        job = _make_completed_job()
+        deps = self._deps(fail_download=True)
+        with pytest.raises(NarrativeError) as ei:
+            _save_tts_job_as_voice_asset(job=job, **deps)
+        assert ei.value.status_code == 502
+
+    def test_job_without_output_raises(self):
+        job = TTSJob.create(user_id="u1", input_text="x", voice_id="v", voice_clone_profile_id="")
+        with pytest.raises(NarrativeError) as ei:
+            _save_tts_job_as_voice_asset(job=job, **self._deps())
+        assert ei.value.status_code == 502
+
+
+# ── prepare_narrative_voice 主流程（monkeypatch workflow） ─────────────────
+
+
+class TestPrepareNarrativeVoice:
+    def _deps(self, db_script=None, *, has_script=True, clone_profile=None, storage_fail=False, points_enabled=False):
+        job = _make_completed_job()
+        return dict(
+            db=FakeDb(db_script if db_script is not None else (_make_script() if has_script else None)),
+            user_id="u1",
+            script_id="script-1",
+            tts_voice_id="longxiaochun",
+            tts_voice_source="preset",
+            tts_repository=FakeTTSRepo(job),
+            cosyvoice_service=FakeCosyVoice(),
+            voice_clone_repository=FakeCloneRepo(clone_profile),
+            asset_repository=FakeAssetRepo(),
+            asset_library_repository=FakeLibraryRepo(),
+            project_repository=FakeProjectRepo(),
+            storage_service=FakeStorage(fail_download=storage_fail),
+            points_enabled=points_enabled,
+        )
+
+    def test_success_returns_context(self, monkeypatch):
+        captured = {}
+
+        class FakeWorkflow:
+            def __init__(self, *, repository, cosyvoice_service):
+                captured["repo"] = repository
+                self._repo = repository
+
+            def start_synthesis(self, job_id):
+                job = self._repo.get(job_id)
+                job.mark_processing()
+                job.mark_completed(
+                    output_audio_url="https://oss/tts/output/x.mp3",
+                    output_audio_key="tts/output/x.mp3",
+                    duration=12.5,
+                )
+                return job
+
+            def poll_and_process_synthesis(self, job_id, timeout=120.0):
+                return self._repo.get(job_id)
+
+        monkeypatch.setattr(ns, "TTSWorkflowService", FakeWorkflow)
+        ctx = prepare_narrative_voice(**self._deps())
+        assert ctx.voice_asset_id == "asset-new"
+        assert ctx.tts_job_id
+        assert ctx.audio_duration == pytest.approx(12.5)
+        assert ctx.script.tags == ["带货"]
+
+    def test_script_missing_404(self):
+        deps = self._deps(has_script=False)
+        with pytest.raises(NarrativeError) as ei:
+            prepare_narrative_voice(**deps)
+        assert ei.value.status_code == 404
+
+    def test_script_other_user_404(self):
+        deps = self._deps(db_script=_make_script(user_id="other"))
+        with pytest.raises(NarrativeError) as ei:
+            prepare_narrative_voice(**deps)
+        assert ei.value.status_code == 404
+
+    def test_empty_content_400(self):
+        deps = self._deps(db_script=_make_script(content="   "))
+        with pytest.raises(NarrativeError) as ei:
+            prepare_narrative_voice(**deps)
+        assert ei.value.status_code == 400
+
+    def test_synth_failure_raises_502(self, monkeypatch):
+        class FailingWorkflow:
+            def __init__(self, *, repository, cosyvoice_service):
+                self._repo = repository
+
+            def start_synthesis(self, job_id):
+                raise RuntimeError("cosyvoice down")
+
+            def process_synthesis_failure(self, job_id, error):
+                return None
+
+        monkeypatch.setattr(ns, "TTSWorkflowService", FailingWorkflow)
+        with pytest.raises(NarrativeError) as ei:
+            prepare_narrative_voice(**self._deps())
+        assert ei.value.status_code == 502
+        assert "配音合成失败" in ei.value.message
+
+    def test_points_insufficient_402(self, monkeypatch):
+        class FakePoints:
+            def deduct_points(self, *a, **k):
+                return {"success": False, "balance": 0}
+
+        monkeypatch.setattr(ns, "PointsService", lambda: FakePoints())
+        deps = self._deps(points_enabled=True)
+        with pytest.raises(NarrativeError) as ei:
+            prepare_narrative_voice(**deps)
+        assert ei.value.status_code == 402
+
+    def test_points_refund_on_failure(self, monkeypatch):
+        class FakePoints:
+            def __init__(self):
+                self.refunded = 0
+
+            def deduct_points(self, *a, **k):
+                return {"success": True, "balance": 100}
+
+            def refund_points(self, user_id, amount, source, db, ref_id="", **k):
+                self.refunded += amount
+
+        points = FakePoints()
+        monkeypatch.setattr(ns, "PointsService", lambda: points)
+
+        class FailingWorkflow:
+            def __init__(self, *, repository, cosyvoice_service):
+                pass
+
+            def start_synthesis(self, job_id):
+                raise RuntimeError("boom")
+
+            def process_synthesis_failure(self, job_id, error):
+                return None
+
+        monkeypatch.setattr(ns, "TTSWorkflowService", FailingWorkflow)
+        deps = self._deps(points_enabled=True)
+        with pytest.raises(NarrativeError):
+            prepare_narrative_voice(**deps)
+        assert points.refunded > 0
+
+    def test_clone_source_resolves_profile(self, monkeypatch):
+        captured = {}
+
+        class FakeWorkflow:
+            def __init__(self, *, repository, cosyvoice_service):
+                self._repo = repository
+                captured["cosy"] = cosyvoice_service
+
+            def start_synthesis(self, job_id):
+                job = self._repo.get(job_id)
+                captured["voice_id"] = job.voice_id
+                job.mark_processing()
+                job.mark_completed(
+                    output_audio_url="https://oss/tts/output/x.mp3",
+                    output_audio_key="tts/output/x.mp3",
+                    duration=12.5,
+                )
+                return job
+
+            def poll_and_process_synthesis(self, job_id, timeout=120.0):
+                return self._repo.get(job_id)
+
+        monkeypatch.setattr(ns, "TTSWorkflowService", FakeWorkflow)
+        deps = self._deps(clone_profile=FakeProfile())
+        deps["tts_voice_id"] = "prof-1"
+        deps["tts_voice_source"] = "clone"
+        prepare_narrative_voice(**deps)
+        assert captured["voice_id"] == "cv-voice-1"
+
+
+if __name__ == "__main__":
+    import pytest as _pytest
+
+    _pytest.main([__file__, "-q"])

tests/unit/test_extract_from_douyin_errors.py

@@ -187,29 +187,39 @@ def test_asr_not_configured_returns_503(fake_user):
 # ── ASR 转写失败 → 502 ────────────────────────────────────────
 
 
-def test_asr_transcription_failure_returns_502(fake_user):
-    """ASR 转写异常 → 502（被 _direct_url_download_and_local_asr 包装）。"""
-    from app.services.script_asr_service import ASRTranscriptionError
+def test_asr_transcription_failure_returns_503_with_desc_fallback(fake_user):
+    """ASR 转写异常（MediaKit+本地都失败）→ desc 兜底；desc 也空则 503。"""
+    from app.api.routes import scripts_ai
+    from app.services.mediakit_client import MediaKitError
+    from fastapi import HTTPException
 
-    scripts_ai = _import_target()
     body = scripts_ai.ExtractFromDouyinRequest(url="https://v.douyin.com/xxxxx/")
 
-    # MediaKit 失败
     fake_mk = mock.MagicMock()
     fake_mk.is_available = True
-    from app.services.mediakit_client import MediaKitError
-
     fake_mk.asr_submit.side_effect = MediaKitError("ASR failed", code="TaskFailed")
 
+    # desc 为空 → 最终 503（stage=asr）
     with _fake_resolver_success(desc=""):
+        with mock.patch("app.api.routes.scripts_ai.get_mediakit_client", return_value=fake_mk):
+            with mock.patch(
+                "app.api.routes.scripts_ai._direct_url_download_and_local_asr",
+                side_effect=HTTPException(status_code=502, detail="语音识别失败: No module named 'apps.worker'"),
+            ):
+                with pytest.raises(HTTPException) as exc:
+                    scripts_ai.extract_from_douyin(request=body, current_user=fake_user, db=mock.MagicMock())
+                assert exc.value.status_code == status.HTTP_503_SERVICE_UNAVAILABLE
+
+    # desc 非空 → desc 兜底成功，返回 200
+    with _fake_resolver_success(desc="这是视频文案描述"):
         with mock.patch("app.api.routes.scripts_ai.get_mediakit_client", return_value=fake_mk):
             with mock.patch(
                 "app.api.routes.scripts_ai._direct_url_download_and_local_asr",
                 side_effect=HTTPException(status_code=502, detail="语音识别失败"),
             ):
-                with pytest.raises(HTTPException) as exc:
-                    scripts_ai.extract_from_douyin(request=body, current_user=fake_user, db=mock.MagicMock())
-                assert exc.value.status_code == status.HTTP_502_BAD_GATEWAY
+                resp = scripts_ai.extract_from_douyin(request=body, current_user=fake_user, db=mock.MagicMock())
+                assert resp.text == "这是视频文案描述"
+                assert resp.duration_seconds == 0.0
 
 
 # ── 下载超时 → 504 ────────────────────────────────────────────

tests/unit/test_generation_common.py

@@ -297,3 +297,74 @@ class TestResolveLatestPlanByTemplate:
         with caplog.at_level("WARNING"):
             assert resolve_latest_plan_by_template(db, template_id="tpl", user_id="u") is None
         assert any("查找最新plan失败" in rec.message for rec in caplog.records)
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# collect_plan_atom_clip_ids (#1970)
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+def _make_atom_clip(atom_clip_id):
+    c = MagicMock()
+    c.atom_clip_id = atom_clip_id
+    return c
+
+
+class TestCollectPlanAtomClipIds:
+    def test_empty_plan_returns_empty(self):
+        from app.services.generation_common import collect_plan_atom_clip_ids
+
+        repo = MagicMock()
+        repo.list_by_plan.return_value = []
+        assert collect_plan_atom_clip_ids("p1", repo) == []
+
+    def test_collects_non_empty_ids_and_ignores_blank(self):
+        from app.services.generation_common import collect_plan_atom_clip_ids
+
+        repo = MagicMock()
+        repo.list_by_plan.side_effect = [
+            [
+                _make_atom_clip("atom-1"),
+                _make_atom_clip(""),
+                _make_atom_clip("atom-2"),
+            ],
+            [],
+        ]
+        assert collect_plan_atom_clip_ids("p1", repo) == ["atom-1", "atom-2"]
+
+    def test_missing_attribute_treated_as_blank(self):
+        from app.services.generation_common import collect_plan_atom_clip_ids
+
+        legacy = MagicMock()
+        del legacy.atom_clip_id  # 旧对象无该属性
+        repo = MagicMock()
+        repo.list_by_plan.side_effect = [[legacy, _make_atom_clip("atom-9")], []]
+        assert collect_plan_atom_clip_ids("p1", repo) == ["atom-9"]
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# writeback_edit_plan_config：#1970 dedup_enabled / video_index
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestWritebackDedupAndVideoIndex:
+    def test_writes_dedup_enabled_and_video_index(self):
+        from app.services.generation_common import writeback_edit_plan_config
+
+        plan = _make_plan_model({})
+        db = MagicMock()
+        db.query.return_value.filter.return_value.first.return_value = plan
+        writeback_edit_plan_config("p1", "t1", None, db, dedup_enabled=False, video_index=3)
+        assert plan.config["dedup_enabled"] is False
+        assert plan.config["video_index"] == 3
+        assert plan.config["generation_task_id"] == "t1"
+
+    def test_none_dedup_does_not_touch_flag(self):
+        from app.services.generation_common import writeback_edit_plan_config
+
+        plan = _make_plan_model({"dedup_enabled": True})
+        db = MagicMock()
+        db.query.return_value.filter.return_value.first.return_value = plan
+        writeback_edit_plan_config("p1", "t1", None, db)
+        assert plan.config["dedup_enabled"] is True
+        assert "video_index" not in plan.config

tests/unit/test_gpu_lipsync_service.py

@@ -0,0 +1,258 @@
+"""GpuLipsyncService 单元测试 — 覆盖任务创建、轮询认领、结果上报、超时回退等核心逻辑.
+
+使用 SQLite 内存数据库，mock 掉存储层（不真实调用 OSS）。
+"""
+
+from __future__ import annotations
+
+import os
+import sys
+from datetime import UTC, datetime, timedelta
+from unittest import mock
+
+import pytest
+
+# 确保 packages / apps/api 可导入
+ROOT = os.path.abspath(os.path.join(os.path.dirname(__file__), "..", ".."))
+for p in (ROOT, os.path.join(ROOT, "apps", "api"), os.path.join(ROOT, "packages")):
+    if p not in sys.path:
+        sys.path.insert(0, p)
+
+# 强制使用内存 SQLite（避免依赖 PG）
+os.environ["APP_ENV"] = "development"
+os.environ["JWT_SECRET_KEY"] = "dev-secret-key-for-testing-00000000"
+os.environ["DATABASE_URL"] = "sqlite:///:memory:"
+os.environ["USE_IN_MEMORY_DB"] = "1"
+os.environ["GPU_WORKER_TOKEN"] = ""  # development 空 token 放行
+
+
+def _build_session():
+    from sqlalchemy import create_engine
+    from sqlalchemy.orm import sessionmaker
+
+    # 使用 packages 的 Base
+    from packages.adapters.sqlalchemy_impl import models as _  # noqa: F401  # 触发 ORM 注册
+    from packages.adapters.sqlalchemy_impl.models import Base
+
+    engine = create_engine("sqlite:///:memory:", future=True)
+    Base.metadata.create_all(engine)
+    Session = sessionmaker(bind=engine, autoflush=False, autocommit=False, future=True)
+    return Session()
+
+
+@pytest.fixture
+def svc():
+    from app.services.gpu_lipsync_service import GpuLipsyncService
+
+    db = _build_session()
+    service = GpuLipsyncService(db)
+    # mock 存储签名（SQLite 测试无 OSS）
+    service.storage = mock.MagicMock()
+    service.storage.get_download_url.side_effect = (
+        lambda k, expires_seconds=3600: f"https://signed.example.com/download/{k}?e={expires_seconds}"
+    )
+    service.storage.get_upload_url.side_effect = (
+        lambda k, expires_seconds=3600, content_type="video/mp4": f"https://signed.example.com/upload/{k}?e={expires_seconds}"
+    )
+    return service
+
+
+# ── 创建任务 ──────────────────────────────────────────────────────
+
+
+def test_create_task(svc):
+    task = svc.create_task(
+        video_url="uploads/v.mp4",
+        audio_url="uploads/a.mp3",
+        lipsync_job_id="lip-1",
+        user_id="u-1",
+        project_id="p-1",
+    )
+    assert task.id
+    assert task.status == "pending"
+    assert task.lipsync_job_id == "lip-1"
+    assert task.attempt == 0
+    assert task.video_url == "uploads/v.mp4"
+
+
+# ── 轮询认领 ──────────────────────────────────────────────────────
+
+
+def test_poll_returns_none_when_empty(svc):
+    assert svc.poll_task("w-1") is None
+
+
+def test_poll_claims_pending_task(svc):
+    svc.create_task(video_url="uploads/v.mp4", audio_url="uploads/a.mp3")
+    claimed = svc.poll_task("w-1")
+    assert claimed is not None
+    assert claimed.status == "processing"
+    assert claimed.worker_id == "w-1"
+    assert claimed.attempt == 1
+    # 带签名 URL
+    assert claimed._signed_video_url.startswith("https://signed.example.com/download/")
+    assert claimed._signed_upload_url.startswith("https://signed.example.com/upload/")
+    # 再 poll 无任务
+    assert svc.poll_task("w-1") is None
+
+
+def test_poll_concurrent_claim_only_one_wins(svc):
+    """并发场景：两个 worker 同时 poll 只有一个能拿到任务（借助 update where status=pending）。"""
+    svc.create_task(video_url="v", audio_url="a")
+    t1 = svc.poll_task("w-1")
+    t2 = svc.poll_task("w-2")
+    assert t1 is not None
+    assert t2 is None
+
+
+# ── 结果上报 ──────────────────────────────────────────────────────
+
+
+def test_report_result_success(svc):
+    t = svc.create_task(video_url="v", audio_url="a")
+    svc.poll_task("w-1")  # claim
+    done = svc.report_result(t.id, "w-1", success=True, duration_seconds=12.5)
+    assert done.status == "done"
+    assert done.result_duration == 12.5
+    assert done.result_url.startswith("gpu-lipsync/results/")
+    assert done.finished_at is not None
+
+
+def test_report_result_failure_requeues(svc):
+    t = svc.create_task(video_url="v", audio_url="a")
+    svc.poll_task("w-1")
+    failed = svc.report_result(t.id, "w-1", success=False, error_msg="MuseTalk crash")
+    assert failed.status == "pending"  # 仍在重试次数内 → 回队
+    assert failed.worker_id == ""
+    assert failed.started_at is None
+    assert "MuseTalk crash" in failed.error_msg
+
+
+def test_report_failure_exhausted_goes_failed(svc):
+    """失败达到 MAX_ATTEMPTS 后标记 failed，不再回队.
+
+    poll 成功会将 attempt 从 0 开始自增；
+    第 1/2 次失败回队，第 3 次失败（attempt==MAX_ATTEMPTS）置 failed。
+    """
+    from app.services import gpu_lipsync_service as mod
+
+    t = svc.create_task(video_url="v", audio_url="a")
+    # 模拟失败到上限：poll + fail 重复 MAX_ATTEMPTS 次
+    for i in range(mod.MAX_ATTEMPTS):
+        claimed = svc.poll_task(f"w-{i}")
+        assert claimed is not None, f"第 {i} 次 poll 应能拿到任务"
+        svc.report_result(t.id, claimed.worker_id, success=False, error_msg=f"fail {i}")
+        svc.db.refresh(t)
+        if i == mod.MAX_ATTEMPTS - 1:
+            assert t.status == "failed"
+        else:
+            assert t.status == "pending"
+
+
+# ── 心跳/超时回退 ─────────────────────────────────────────────────
+
+
+def test_timed_out_task_is_redispatched(svc):
+    """processing 超过 gpu_task_timeout_seconds 无心跳 → 回退 pending."""
+    t = svc.create_task(video_url="v", audio_url="a")
+    svc.poll_task("w-1")
+    svc.db.refresh(t)
+    assert t.status == "processing"
+    # 手动把 last_heartbeat_at 设到很久以前
+    t.last_heartbeat_at = datetime.now(UTC) - timedelta(seconds=svc.settings.gpu_task_timeout_seconds + 10)
+    svc.db.commit()
+    # 再次 poll 会触发 _recover_timed_out_tasks 把它回队
+    claimed = svc.poll_task("w-2")
+    assert claimed is not None
+    assert claimed.id == t.id
+    assert claimed.worker_id == "w-2"
+    assert claimed.attempt == 2  # 又认领了一次
+
+
+# ── Worker 注册 ───────────────────────────────────────────────────
+
+
+def test_register_worker_creates_then_updates(svc):
+    w = svc.register_worker("w-1", hostname="pc1", gpu_name="RTX2060", free_vram_mb=3500)
+    assert w.worker_id == "w-1"
+    assert w.gpu_name == "RTX2060"
+    w2 = svc.register_worker("w-1", hostname="pc1", gpu_name="RTX2060", free_vram_mb=2000)
+    assert w2.free_vram_mb == 2000  # 更新
+    assert w2.created_at == w.created_at  # 没新建
+
+
+def test_register_with_task_id_refreshes_task_heartbeat(svc):
+    """#1970 推理期心跳：register(task_id=...) 只刷新本 worker 的 processing 任务."""
+    from packages.adapters.sqlalchemy_impl.models import GpuWorkerModel
+
+    t = svc.create_task(video_url="v", audio_url="a")
+    svc.poll_task("w-1")
+    svc.db.refresh(t)
+    old_hb = t.last_heartbeat_at
+    assert t.status == "processing"
+    # 模拟时间流逝后心跳到达
+    svc.db.query(GpuWorkerModel).filter_by(worker_id="w-1").update(
+        {"last_heartbeat_at": old_hb - timedelta(seconds=300)}
+    )
+    svc.db.commit()
+    svc.register_worker("w-1", task_id=t.id)
+    svc.db.refresh(t)
+    assert t.last_heartbeat_at > old_hb
+    assert t.status == "processing"  # 心跳不改变状态
+    # worker 表心跳也被刷新
+    w = svc.db.query(GpuWorkerModel).filter_by(worker_id="w-1").one()
+    assert w.last_heartbeat_at > old_hb
+
+
+def test_register_task_heartbeat_ignores_finished_or_foreign_task(svc):
+    """任务已 done，或已被超时回收重新派发给别的 worker 时，旧心跳必须忽略."""
+    from packages.adapters.sqlalchemy_impl.models import GpuLipsyncTaskModel, GpuWorkerModel
+
+    # 场景 1：任务已完成 → register 带 task_id 不得改写任务心跳
+    t = svc.create_task(video_url="v", audio_url="a")
+    svc.poll_task("w-1")
+    done = svc.report_result(t.id, "w-1", success=True, duration_seconds=10.0)
+    hb_when_done = done.last_heartbeat_at
+    svc.register_worker("w-1", task_id=t.id)
+    svc.db.refresh(t)
+    assert t.status == "done"
+    assert t.last_heartbeat_at == hb_when_done  # 没被改写
+
+    # 场景 2：任务超时回收后被 w-2 重新认领，旧 worker w-1 的迟到心跳无效
+    t2 = svc.create_task(video_url="v2", audio_url="a2")
+    svc.poll_task("w-1")
+    svc.db.refresh(t2)
+    t2.last_heartbeat_at = datetime.now(UTC) - timedelta(days=1)
+    svc.db.commit()
+    claimed = svc.poll_task("w-2")  # 触发回收并由 w-2 重新认领
+    assert claimed is not None and claimed.id == t2.id
+    owner_hb = claimed.last_heartbeat_at
+    # 把 w-2 的 worker 心跳拨早，确认旧心跳不会影响任务归属
+    svc.db.query(GpuWorkerModel).filter_by(worker_id="w-2").update(
+        {"last_heartbeat_at": owner_hb - timedelta(seconds=600)}
+    )
+    svc.db.commit()
+    svc.register_worker("w-1", task_id=t2.id)  # 旧 worker 迟到心跳
+    svc.db.refresh(t2)
+    assert t2.worker_id == "w-2"
+    assert t2.status == "processing"
+    assert t2.last_heartbeat_at == owner_hb
+
+    # 场景 3：不存在的 task_id 不报错
+    svc.register_worker("w-1", task_id="nonexistent-id")
+    assert svc.db.get(GpuLipsyncTaskModel, "nonexistent-id") is None
+
+
+def test_default_gpu_task_timeout_is_900(svc):
+    """#1970 默认超时 300→900，覆盖 RTX2060 长视频推理."""
+    assert svc.settings.gpu_task_timeout_seconds == 900
+
+
+# ── get_by_lipsync_job ─────────────────────────────────────────────
+
+
+def test_get_by_lipsync_job_returns_latest(svc):
+    svc.create_task(video_url="v", audio_url="a", lipsync_job_id="lip-1")
+    svc.create_task(video_url="v", audio_url="a", lipsync_job_id="lip-1")
+    latest = svc.get_by_lipsync_job("lip-1")
+    assert latest is not None

tests/unit/test_lipsync_gpu_integration.py

@@ -0,0 +1,155 @@
+"""LipsyncService GPU 路径集成测试."""
+
+from __future__ import annotations
+
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+
+@pytest.fixture()
+def fake_db():
+    db = MagicMock()
+    return db
+
+
+@pytest.fixture()
+def fake_mediakit():
+    client = MagicMock()
+    client.submit_lipsync.return_value = {"task_id": "mk-task-1"}
+    return client
+
+
+def _make_job(video_url="oss://video.mp4", audio_url="oss://audio.wav"):
+    job = MagicMock()
+    job.id = "job-1"
+    job.user_id = "u1"
+    job.project_id = "p1"
+    job.video_url = video_url
+    job.audio_url = audio_url
+    job.enable_video_loop = True
+    job.script_text = ""
+    job.sentence_timings = None
+    return job
+
+
+def _make_svc(db, mediakit, use_gpu=False):
+    from app.services.lipsync_service import LipsyncService
+
+    svc = LipsyncService(db=db, client=mediakit)
+    svc.settings.use_gpu_lipsync = use_gpu
+    svc._sign_media_url = lambda u: (u or "") + "?signed"
+    return svc
+
+
+class TestGpuFallback:
+    def test_switch_off_uses_mediakit(self, fake_db, fake_mediakit):
+        """开关关闭时直接走 MediaKit，不调用 _submit_to_gpu."""
+        svc = _make_svc(fake_db, fake_mediakit, use_gpu=False)
+        job = _make_job()
+        with patch.object(svc, "_submit_to_gpu") as m_sub:
+            svc._submit_audio_direct(job=job)
+            m_sub.assert_not_called()
+        fake_mediakit.submit_lipsync.assert_called_once()
+        assert job.status == "submitted"
+
+    def test_switch_on_no_worker_falls_back(self, fake_db, fake_mediakit):
+        """开关打开但 has_available_worker=False → 回退 MediaKit."""
+        svc = _make_svc(fake_db, fake_mediakit, use_gpu=True)
+        fake_gpu_svc = MagicMock()
+        fake_gpu_svc.has_available_worker.return_value = False
+        with patch("app.services.gpu_lipsync_service.GpuLipsyncService", return_value=fake_gpu_svc):
+            job = _make_job()
+            svc._submit_audio_direct(job=job)
+        fake_gpu_svc.create_task.assert_not_called()
+        fake_mediakit.submit_lipsync.assert_called_once()
+        assert job.status == "submitted"
+
+    def test_gpu_success_marks_completed(self, fake_db, fake_mediakit):
+        """GPU 路径成功：job 直接 completed，不调 MediaKit."""
+        svc = _make_svc(fake_db, fake_mediakit, use_gpu=True)
+        gpu_done = MagicMock(
+            id="gpu-task-1",
+            status="done",
+            result_url="oss://gpu-results/r.mp4",
+            result_duration=12.5,
+        )
+        fake_gpu_svc = MagicMock()
+        fake_gpu_svc.has_available_worker.return_value = True
+        fake_gpu_svc.create_task.return_value = MagicMock(id="gpu-task-1")
+        fake_gpu_svc.wait_for_result.return_value = gpu_done
+        with patch("app.services.gpu_lipsync_service.GpuLipsyncService", return_value=fake_gpu_svc):
+            job = _make_job()
+            svc._submit_audio_direct(job=job)
+        fake_gpu_svc.create_task.assert_called_once()
+        fake_mediakit.submit_lipsync.assert_not_called()
+        assert job.status == "completed"
+        assert job.output_duration == 12.5
+        assert "?signed" in job.output_video_url
+        fake_db.commit.assert_called()
+
+    def test_gpu_timeout_falls_back(self, fake_db, fake_mediakit):
+        """wait_for_result 返回 None（超时）→ 回退 MediaKit."""
+        svc = _make_svc(fake_db, fake_mediakit, use_gpu=True)
+        fake_gpu_svc = MagicMock()
+        fake_gpu_svc.has_available_worker.return_value = True
+        fake_gpu_svc.create_task.return_value = MagicMock(id="gpu-t")
+        fake_gpu_svc.wait_for_result.return_value = None
+        with patch("app.services.gpu_lipsync_service.GpuLipsyncService", return_value=fake_gpu_svc):
+            job = _make_job()
+            svc._submit_audio_direct(job=job)
+        fake_mediakit.submit_lipsync.assert_called_once()
+        assert job.status == "submitted"
+
+    def test_gpu_failed_status_falls_back(self, fake_db, fake_mediakit):
+        """GPU 终态 failed → 回退 MediaKit."""
+        svc = _make_svc(fake_db, fake_mediakit, use_gpu=True)
+        fake_gpu_svc = MagicMock()
+        fake_gpu_svc.has_available_worker.return_value = True
+        fake_gpu_svc.create_task.return_value = MagicMock(id="gpu-t")
+        fake_gpu_svc.wait_for_result.return_value = MagicMock(status="failed", error_msg="musetalk crash")
+        with patch("app.services.gpu_lipsync_service.GpuLipsyncService", return_value=fake_gpu_svc):
+            job = _make_job()
+            svc._submit_audio_direct(job=job)
+        fake_mediakit.submit_lipsync.assert_called_once()
+        assert job.status == "submitted"
+
+    def test_gpu_exception_falls_back(self, fake_db, fake_mediakit):
+        """GPU 路径抛异常 → 回退 MediaKit."""
+        svc = _make_svc(fake_db, fake_mediakit, use_gpu=True)
+        fake_gpu_svc = MagicMock()
+        fake_gpu_svc.has_available_worker.return_value = True
+        fake_gpu_svc.create_task.side_effect = RuntimeError("DB down")
+        with patch("app.services.gpu_lipsync_service.GpuLipsyncService", return_value=fake_gpu_svc):
+            job = _make_job()
+            svc._submit_audio_direct(job=job)
+        fake_mediakit.submit_lipsync.assert_called_once()
+        assert job.status == "submitted"
+
+
+class TestGpuServiceHelpers:
+    """GpuLipsyncService.has_available_worker 测试."""
+
+    def test_no_workers(self, fake_db):
+        from app.services.gpu_lipsync_service import GpuLipsyncService
+
+        svc = GpuLipsyncService(db=fake_db)
+        fake_db.query.return_value.filter.return_value.first.return_value = None
+        assert svc.has_available_worker() is False
+
+    def test_fresh_worker_available(self, fake_db):
+        from app.services.gpu_lipsync_service import GpuLipsyncService
+
+        svc = GpuLipsyncService(db=fake_db)
+        svc.settings.gpu_worker_stale_seconds = 300
+        # 模拟SQL filter条件成立 → first() 返回非None
+        fake_db.query.return_value.filter.return_value.first.return_value = MagicMock()
+        assert svc.has_available_worker() is True
+
+    def test_stale_worker_unavailable(self, fake_db):
+        from app.services.gpu_lipsync_service import GpuLipsyncService
+
+        svc = GpuLipsyncService(db=fake_db)
+        # filter条件不成立（stale）→ first() 返回None
+        fake_db.query.return_value.filter.return_value.first.return_value = None
+        assert svc.has_available_worker() is False

tests/unit/test_unified_render_service.py

@@ -53,11 +53,16 @@ class FakeClip:
 
 @dataclass
 class FakePlan:
-    """模拟 EditPlan。"""
+    """模拟 EditPlan。
+
+    注意：config 默认 dedup_enabled=False，关闭 #1970 片段级微变换，
+    让本文件既有的确定性渲染/stream copy 断言不受随机微变换影响；
+    微变换本身的行为在 test_1970_micro_transform_render.py 覆盖。
+    """
 
     id: str = "plan_001"
     name: str = "测试计划"
-    config: dict[str, Any] = field(default_factory=dict)
+    config: dict[str, Any] = field(default_factory=lambda: {"dedup_enabled": False})
 
 
 @pytest.fixture(autouse=True)