fix: WebCodecs 解码失败时自动 fallback 到原生 video 播放

- useCanvasPlayer 新增 hasDecodeError/errorMessage 状态和 onError 回调
- decodeSegment catch 块不再静默失败，更新状态并通知上层
- VideoDecoder error 回调同步报告错误状态
- 连续 3 次解码失败时报告 hasDecodeError
- FrontendPreviewPlayer 检测 hasDecodeError 后自动切换 video fallback
- 解码失败时显示具体错误信息而非静默'暂无可播放素材'
- 新增 normalizeCodecString 函数规范化 codec 字符串
- configure 调用增加 codec 字符码调试日志

apps/api/app/api/routes/generation_cover.py

@@ -31,6 +31,8 @@ logger = logging.getLogger(__name__)
 router = APIRouter(tags=["Generation"])
 
 
+
+
 # ── Schemas ──────────────────────────────────────────────────────────────
 
 
@@ -63,66 +65,6 @@ class GenerateCoverResponse(BaseModel):
 # ── Route ────────────────────────────────────────────────────────────────
 
 
-def _persist_cover_frame(frame_url: str, plan_id: str, title_text: str = "") -> str:
-    """下载 MediaKit 返回的临时帧图，可选叠加标题后转存到 OSS covers/ 路径。
-
-    Args:
-        frame_url: MediaKit 返回的临时帧图 URL
-        plan_id: 剪辑计划 ID（生成 OSS key）
-        title_text: 非空时用 Pillow 在帧上叠加标题（用于 E2 从源素材抽帧，
-            因为源素材本身没有烧录标题）
-    """
-    import tempfile
-    import uuid
-    from pathlib import Path
-
-    tmp_path: str | None = None
-    try:
-        import httpx
-
-        resp = httpx.get(frame_url, timeout=30, follow_redirects=True)
-        resp.raise_for_status()
-        if not resp.content:
-            return frame_url
-
-        with tempfile.NamedTemporaryFile(suffix=".jpg", delete=False) as tmp:
-            tmp.write(resp.content)
-            tmp_path = tmp.name
-
-        # E2 从源素材抽帧时，源素材无标题，叠加标题文字
-        if title_text and title_text.strip():
-            try:
-                from packages.shared.title_overlay import apply_title_to_image
-
-                applied = apply_title_to_image(tmp_path, title_text)
-                if applied:
-                    logger.info("[封面生成] E2 帧图已叠加标题: plan_id=%s", plan_id)
-            except Exception:
-                logger.warning(
-                    "[封面生成] E2 标题叠加失败（返回无标题帧）: plan_id=%s",
-                    plan_id,
-                    exc_info=True,
-                )
-
-        from packages.shared.storage import get_shared_storage_service
-
-        storage = get_shared_storage_service()
-        cover_key = f"covers/{plan_id}/cover_{uuid.uuid4().hex[:8]}.jpg"
-        storage.upload_file(
-            file_or_path=tmp_path,
-            storage_key=cover_key,
-            content_type="image/jpeg",
-        )
-        public_url = storage.get_url(cover_key)
-        return public_url or frame_url
-    except Exception:
-        logger.warning("封面帧转存失败，返回原始 URL: plan_id=%s", plan_id, exc_info=True)
-        return frame_url
-    finally:
-        if tmp_path:
-            Path(tmp_path).unlink(missing_ok=True)
-
-
 @router.post("/generate-cover", response_model=GenerateCoverResponse)
 def generate_cover(
     body: GenerateCoverRequest,
@@ -256,31 +198,44 @@ def generate_cover(
                 exc_info=True,
             )
 
-    # 使用裸 URL（rendered/* 已配置公开读）；找不到渲染视频时不立即报错，
-    # 因为步骤 E 可以直接从源素材抽帧（历史数据或 Worker 抽帧失败时的兜底）
+    # 仍然找不到才报 400
+    if not rendered_storage_key:
+        logger.error("[封面生成] ❌ 找不到预览视频: plan_id=%s", plan_id)
+        raise HTTPException(
+            status_code=400,
+            detail="请先生成预览视频，再生成封面",
+        )
+
+    # 回写到 plan.config
+    plan_svc.update_plan_config(plan_id, {"rendered_storage_key": rendered_storage_key})
+
+    # 使用裸 URL（rendered/* 已配置公开读）
     primary_video_url = None
-    if rendered_storage_key:
-        plan_svc.update_plan_config(plan_id, {"rendered_storage_key": rendered_storage_key})
-        try:
-            if rendered_storage_key.startswith("http"):
-                primary_video_url = rendered_storage_key
-            else:
-                from packages.shared.storage import get_shared_storage_service
+    try:
+        if rendered_storage_key.startswith("http"):
+            primary_video_url = rendered_storage_key
+        else:
+            from packages.shared.storage import get_shared_storage_service
 
-                storage_svc = get_shared_storage_service()
-                primary_video_url = storage_svc.get_url(rendered_storage_key)
-            if primary_video_url:
-                import re as _re
+            storage_svc = get_shared_storage_service()
+            primary_video_url = storage_svc.get_url(rendered_storage_key)
+        # 防御性规范化：合并路径中的双斜杠（// -> /），但保留协议头的 ://
+        # 历史数据中 project_id 为空时会产生 projects//tasks/ 路径，
+        # MediaKit 的 HTTP 客户端会规范化 URL 导致 404
+        if primary_video_url:
+            import re as _re
 
-                primary_video_url = _re.sub(r"(?<!:)//", "/", primary_video_url)
-            logger.info(
-                "获取预览视频URL用于封面生成: plan_id=%s url=%s",
-                plan_id,
-                primary_video_url[:80] if primary_video_url else "",
-            )
-        except Exception as e:
-            logger.warning("获取预览视频URL失败: plan_id=%s err=%s", plan_id, e)
-            primary_video_url = None
+            primary_video_url = _re.sub(r"(?<!:)//", "/", primary_video_url)
+        logger.info(
+            "获取预览视频URL用于封面生成: plan_id=%s url=%s",
+            plan_id,
+            primary_video_url[:80] if primary_video_url else "",
+        )
+    except Exception as e:
+        raise HTTPException(
+            status_code=500,
+            detail=f"获取预览视频URL失败: {e}",
+        ) from e
 
     # 统一封面管道：优先从 GenerationTask.cover_url 读取渲染后视频抽帧的封面
     # 多步查找 cover_url，和查找视频 URL 一样的 fallback 逻辑
@@ -355,118 +310,6 @@ def generate_cover(
                     exc_info=True,
                 )
 
-        # 步骤 D：从 plan.config.cover_candidates 读取（Worker 渲染时写入）
-        if not cover_url_from_task:
-            _candidates = (plan.config or {}).get("cover_candidates") or []
-            if isinstance(_candidates, list) and _candidates:
-                _first = _candidates[0]
-                if isinstance(_first, dict):
-                    cover_url_from_task = _first.get("image_url") or _first.get("url") or ""
-                    if cover_url_from_task:
-                        logger.info(
-                            "[封面生成] 统一管道封面(步骤D-cover_candidates): plan_id=%s url=%s",
-                            plan_id,
-                            cover_url_from_task[:80],
-                        )
-
-        # 步骤 E1：如果有已渲染的预览视频 URL 但 cover_url 未持久化（历史数据），
-        # 直接从渲染视频抽帧
-        if not cover_url_from_task and primary_video_url:
-            try:
-                from packages.shared.mediakit_client import get_mediakit_client
-
-                mk_client = get_mediakit_client()
-                if mk_client.is_available:
-                    logger.info(
-                        "[封面生成] 步骤E1-从渲染视频抽帧: plan_id=%s url=%s",
-                        plan_id,
-                        primary_video_url[:80],
-                    )
-                    snapshots = mk_client.extract_frames(
-                        video_url=primary_video_url,
-                        strategy="SpecifiedFrames",
-                        max_frames=1,
-                        poll_interval=2.0,
-                        max_poll_attempts=5,
-                        max_retries=0,
-                    )
-                    if snapshots:
-                        raw = snapshots[0].get("image_url") or snapshots[0].get("url") or ""
-                        if raw:
-                            cover_url_from_task = _persist_cover_frame(raw, plan_id)
-                            logger.info(
-                                "[封面生成] 统一管道封面(步骤E1-rendered-video): plan_id=%s url=%s",
-                                plan_id,
-                                cover_url_from_task[:80],
-                            )
-            except Exception:
-                logger.warning(
-                    "[封面生成] 步骤E1从渲染视频抽帧失败: plan_id=%s",
-                    plan_id,
-                    exc_info=True,
-                )
-
-        # 步骤 E2：当 A/B/C/D/E1 均未命中（如历史预览任务无 cover_url）时，
-        # 直接从用户选择的第一个视频素材中抽取封面帧作为兜底。API 请求内短超时，不阻塞。
-        if not cover_url_from_task and body.asset_ids:
-            from packages.adapters.sqlalchemy_impl.asset_repository import (
-                SQLAlchemyAssetRepository,
-            )
-            from packages.shared.mediakit_client import get_mediakit_client
-            from packages.shared.storage import get_shared_storage_service
-
-            asset_repo = SQLAlchemyAssetRepository(db)
-            storage_svc = get_shared_storage_service()
-            mk_client = get_mediakit_client()
-            # 从 plan.config 读取标题，E2 从源素材抽帧时叠加（源素材本身无标题）
-            _e2_title_cfg = (plan.config or {}).get("title", {}) or {}
-            if not isinstance(_e2_title_cfg, dict):
-                _e2_title_cfg = {}
-            _e2_title_text = (_e2_title_cfg.get("text", "") or "").strip() if _e2_title_cfg.get("enabled", True) else ""
-            if mk_client.is_available:
-                for aid in body.asset_ids:
-                    try:
-                        asset = asset_repo.get(aid)
-                        if not asset or asset.file_type != "video":
-                            continue
-                        sk = asset.storage_key or ""
-                        if not sk:
-                            continue
-                        src_url = sk if sk.startswith("http") else storage_svc.get_url(sk)
-                        if not src_url:
-                            continue
-                        logger.info(
-                            "[封面生成] 步骤E-从素材抽帧: plan_id=%s asset_id=%s url=%s",
-                            plan_id,
-                            aid,
-                            src_url[:80],
-                        )
-                        snapshots = mk_client.extract_frames(
-                            video_url=src_url,
-                            strategy="SpecifiedFrames",
-                            max_frames=1,
-                            poll_interval=2.0,
-                            max_poll_attempts=5,
-                            max_retries=0,
-                        )
-                        if snapshots:
-                            raw = snapshots[0].get("image_url") or snapshots[0].get("url") or ""
-                            if raw:
-                                cover_url_from_task = _persist_cover_frame(raw, plan_id, title_text=_e2_title_text)
-                                logger.info(
-                                    "[封面生成] 统一管道封面(步骤E-source-asset): plan_id=%s url=%s",
-                                    plan_id,
-                                    cover_url_from_task[:80],
-                                )
-                                break
-                    except Exception:
-                        logger.warning(
-                            "[封面生成] 步骤E从素材抽帧失败: plan_id=%s asset_id=%s",
-                            plan_id,
-                            aid,
-                            exc_info=True,
-                        )
-
         if cover_url_from_task:
             # 标题已在预览视频渲染时烧录（ASS字幕），封面帧自然包含标题
             cover_data = {
@@ -482,13 +325,13 @@ def generate_cover(
             return GenerateCoverResponse(plan_id=plan_id, cover=cover_data)
 
         logger.warning(
-            "[封面生成] 统一管道未找到 cover_url (A/B/C/D均未命中): plan_id=%s",
+            "[封面生成] 统一管道未找到 cover_url: plan_id=%s",
             plan_id,
         )
         # ai_frame/ai_regenerate 类型必须从渲染管道获取，不再回退到 AI 服务
         raise HTTPException(
             status_code=400,
-            detail="封面生成失败：未找到可抽帧的视频素材，请确认已上传视频素材后重试",
+            detail="封面尚未生成，请先重新生成预览视频以触发封面自动提取",
         )
 
     from packages.shared.ai_service import run_generate_cover

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

@@ -231,7 +231,10 @@ test.describe("Core generation flow", () => {
       (response) => {
         const url = response.url()
         const path = new URL(url).pathname
-        return response.request().method() === "POST" && path.endsWith("/generation/tasks")
+        return (
+          response.request().method() === "POST" &&
+          path.endsWith("/generation/tasks")
+        )
       },
       { timeout: 30_000 },
     )

apps/web/src/api/bgm/bgm.ts

@@ -4,20 +4,11 @@
 import apiClient from "../client"
 import type { BgmPreset, BgmPresetsQuery } from "./types"
 
-/**
- * 获取 BGM 预设列表
- * @param templateId 模板/草稿 ID
- * @param params 分类/关键词筛选
- */
-export const getBgmPresets = async (
-  templateId: string,
-  params?: BgmPresetsQuery,
-): Promise<BgmPreset[]> => {
+/** 获取 BGM 预设列表 */
+export const getBgmPresets = async (params?: BgmPresetsQuery): Promise<BgmPreset[]> => {
   const searchParams: Record<string, string> = {}
   if (params?.category) searchParams.category = params.category
   if (params?.keyword) searchParams.keyword = params.keyword
-  const res = await apiClient.get(`/templates/${templateId}/editor/bgm/presets`, {
-    params: searchParams,
-  })
+  const res = await apiClient.get("/bgm/presets", { params: searchParams })
   return res.data?.data ?? res.data ?? []
 }

apps/web/src/api/generation/cover.ts

@@ -1,22 +1,9 @@
 import apiClient from "../client"
 
-export interface GenerateCoverTitleConfig {
-  text?: string
-  font?: string
-  font_size?: number
-  font_color?: string
-  position?: string
-  bold?: boolean
-  stroke?: boolean
-  shadow?: boolean
-}
-
 export interface GenerateCoverRequest {
   asset_ids: string[]
   cover_type?: "ai_frame" | "manual" | "upload" | "ai_regenerate"
   frame_time?: number
-  /** 标题样式，用于在封面上叠加标题文字 */
-  title_config?: GenerateCoverTitleConfig
 }
 
 export interface GenerateCoverResponse {

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

@@ -6,7 +6,6 @@ import apiClient from "../client"
 import type {
   CreateGenerationTaskRequest,
   CreateGenerationTaskResponse,
-  GenerationTaskDetail,
   TaskItem,
   TaskListParams,
   TaskListResponse,
@@ -20,12 +19,6 @@ export const createGenerationTask = async (
   return data
 }
 
-/** 获取单个生成任务详情（轮询用） */
-export const getGenerationTask = async (taskId: string): Promise<GenerationTaskDetail> => {
-  const { data } = await apiClient.get<GenerationTaskDetail>(`/generation/tasks/${taskId}`)
-  return data
-}
-
 /** 获取任务列表（支持分页和筛选） */
 export const getTasks = async (params?: TaskListParams): Promise<TaskListResponse> => {
   const { data } = await apiClient.get<TaskListResponse>("/tasks", {

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

@@ -82,12 +82,10 @@ export interface CreateGenerationTaskRequest {
     stroke?: boolean
     shadow?: boolean
   }
-  /** 关联的草稿 ID（编辑流程数据链路用） */
-  source_edit_plan_id?: string
 }
 
-/** 单个生成任务详情（对齐后端 GenerationTaskResponse） */
-export interface GenerationTaskDetail {
+/** 创建生成任务响应（对齐后端 GenerationTaskResponse） */
+export interface CreateGenerationTaskResponse {
   id: string
   project_id: string
   asset_library_id: string
@@ -97,18 +95,8 @@ export interface GenerationTaskDetail {
   asset_ids: string[]
   title_ids: string[]
   voice_ids: string[]
-  source_edit_plan_id?: string
   status: string
   progress: number
   result_count: number
   error_message: string
-  error_info?: TaskErrorInfo
-  created_at?: string | null
-  updated_at?: string | null
-}
-
-/** 创建生成任务响应（后端返回批量结构 {items, total}） */
-export interface CreateGenerationTaskResponse {
-  items: GenerationTaskDetail[]
-  total: number
 }

apps/web/src/api/template-editor/editPlans.ts

@@ -4,29 +4,51 @@
 import apiClient from "../client"
 import type {
   EditPlan,
+  EditPlanListParams,
+  EditPlanListResponse,
+  CreateEditPlanRequest,
   UpdateEditPlanRequest,
   GenerateResponse,
   GenerationStatusResponse,
   EditPlanGeneration,
   GeneratedVideo,
+  CopyEditPlanRequest,
 } from "./types"
 
+/** 获取模板草稿列表（支持分页和筛选） */
+export async function getEditPlans(params?: EditPlanListParams): Promise<EditPlanListResponse> {
+  const response = await apiClient.get<EditPlanListResponse>("/templates/drafts", {
+    params,
+  })
+  return response.data
+}
+
 /** 获取单个模板草稿 */
 export async function getEditPlan(templateId: string): Promise<EditPlan> {
   const response = await apiClient.get(`/templates/${templateId}/editor`)
   return response.data
 }
 
-/** 更新模板草稿（支持传入 AbortSignal 用于自动保存竞态取消） */
+/** 创建模板草稿 */
+export async function createEditPlan(data: CreateEditPlanRequest): Promise<EditPlan> {
+  const response = await apiClient.post("/templates/drafts", data)
+  return response.data
+}
+
+/** 更新模板草稿 */
 export async function updateEditPlan(
   templateId: string,
   data: UpdateEditPlanRequest,
-  signal?: AbortSignal,
 ): Promise<EditPlan> {
-  const response = await apiClient.put(`/templates/${templateId}/editor`, data, { signal })
+  const response = await apiClient.put(`/templates/${templateId}/editor`, data)
   return response.data
 }
 
+/** 删除模板草稿 */
+export async function deleteEditPlan(templateId: string): Promise<void> {
+  await apiClient.delete(`/templates/${templateId}/editor`)
+}
+
 /** 触发生成 */
 export async function generateEditPlan(templateId: string): Promise<GenerateResponse> {
   const response = await apiClient.post(`/templates/${templateId}/editor/generate`)
@@ -51,28 +73,19 @@ export async function getGenerationTaskResults(taskId: string): Promise<Generate
   return response.data.items || response.data || []
 }
 
-/** ── 草稿 clips 批量更新 ── */
-
-export interface EditPlanClipInput {
-  asset_id: string
-  start_time: number
-  duration: number
-  order: number
+/** 取消生成任务 */
+export async function cancelGeneration(templateId: string): Promise<void> {
+  await apiClient.post(`/templates/${templateId}/editor/cancel`)
 }
 
-/**
- * 批量替换草稿的 clips（先全删再批量插入）
- * 后端路由：PUT /templates/{template_id}/editor/clips
- */
-export async function updateEditPlanClips(
+/** 复制模板草稿（含所有片段配置） */
+export async function copyEditPlan(
   templateId: string,
-  clips: EditPlanClipInput[],
-  signal?: AbortSignal,
-): Promise<{ count: number }> {
-  const response = await apiClient.put(
-    `/templates/${templateId}/editor/clips`,
-    { clips },
-    { signal },
+  data?: CopyEditPlanRequest,
+): Promise<EditPlan> {
+  const response = await apiClient.post<EditPlan>(
+    `/templates/${templateId}/editor/copy`,
+    data || {},
   )
   return response.data
 }

apps/web/src/api/template-editor/index.ts

@@ -15,7 +15,10 @@ export type {
   EditPlanSegment,
   EditPlanConfig,
   EditPlan,
+  CreateEditPlanRequest,
   UpdateEditPlanRequest,
+  EditPlanListParams,
+  EditPlanListResponse,
   GenerateResponse,
   EditPlanGeneration,
   ClipStatusItem,
@@ -34,6 +37,7 @@ export type {
   ClipReorderResponse,
   ClipBatchDeleteResponse,
   ClipsFromAssetsResponse,
+  CopyEditPlanRequest,
   TransitionEffect,
   MediaAsset,
 } from "./types"
@@ -49,15 +53,18 @@ export {
 
 // 模板草稿 CRUD + 生成
 export {
+  getEditPlans,
   getEditPlan,
+  createEditPlan,
   updateEditPlan,
-  updateEditPlanClips,
+  deleteEditPlan,
   generateEditPlan,
   getGenerationStatus,
   getEditPlanGenerations,
   getGenerationTaskResults,
+  cancelGeneration,
+  copyEditPlan,
 } from "./editPlans"
-export type { EditPlanClipInput } from "./editPlans"
 
 // 片段 CRUD + 批量操作
 export {

apps/web/src/api/template-editor/types.ts

@@ -118,17 +118,6 @@ export interface EditPlanConfig {
   generate_count?: number
   /** 素材模式 */
   material_mode?: string
-  /** 前端标题设置（Step4 自动保存，与 title_config 字段分离，不影响后端渲染） */
-  title?: {
-    text?: string
-    font?: string
-    font_size?: number
-    color?: string
-    position?: string
-    bold?: boolean
-    stroke?: boolean
-    shadow?: boolean
-  }
   /** 预览视频 URL（封面生成用） */
   rendered_storage_key?: string
   /** 生成任务 ID */

apps/web/src/api/templates/index.ts

@@ -9,6 +9,8 @@ export type {
   TemplateSegment,
   TemplateListParams,
   TemplateListResponse,
+  GenerateFromTemplateRequest,
+  GenerateFromTemplateResponse,
   CopyTemplateResponse,
 } from "./types"
 
@@ -22,4 +24,5 @@ export {
   getTemplate,
   toggleFavoriteTemplate,
   copyTemplate,
+  generateFromTemplate,
 } from "./templates"

apps/web/src/api/templates/templates.ts

@@ -5,6 +5,8 @@
 import apiClient from "../client"
 import type {
   CopyTemplateResponse,
+  GenerateFromTemplateRequest,
+  GenerateFromTemplateResponse,
   TemplateItem,
   TemplateListParams,
   TemplateListResponse,
@@ -43,3 +45,15 @@ export const copyTemplate = async (templateId: string): Promise<CopyTemplateResp
   const response = await apiClient.post<CopyTemplateResponse>(`/templates/${templateId}/copy`)
   return response.data
 }
+
+/** 从模板生成 */
+export const generateFromTemplate = async (
+  templateId: string,
+  data?: GenerateFromTemplateRequest,
+): Promise<GenerateFromTemplateResponse> => {
+  const response = await apiClient.post<GenerateFromTemplateResponse>(
+    `/templates/${templateId}/generate`,
+    data,
+  )
+  return response.data
+}

apps/web/src/pages/editing-planner/components/bgm-selector/index.tsx

@@ -16,17 +16,9 @@ interface BgmSelectorProps {
   onClose: () => void
   config: BgmMixConfig
   onChange: (config: BgmMixConfig) => void
-  /** 模板/草稿 ID，用于请求 BGM 预设 */
-  templateId?: string
 }
 
-const BgmSelector: React.FC<BgmSelectorProps> = ({
-  open,
-  onClose,
-  config,
-  onChange,
-  templateId,
-}) => {
+const BgmSelector: React.FC<BgmSelectorProps> = ({ open, onClose, config, onChange }) => {
   const {
     presets,
     loading,
@@ -38,7 +30,7 @@ const BgmSelector: React.FC<BgmSelectorProps> = ({
     loadPresets,
     handlePreview,
     stopPreview,
-  } = useBgmSelector(open, templateId)
+  } = useBgmSelector(open)
 
   /* ── 选中 BGM ── */
   const handleSelect = useCallback(

apps/web/src/pages/editing-planner/components/bgm-selector/useBgmSelector.ts

@@ -19,7 +19,7 @@ export const CATEGORY_LIST: {
  * BGM 选择器数据与交互 Hook
  * 封装列表加载、搜索、分类筛选、试听播放逻辑
  */
-export function useBgmSelector(open: boolean, templateId?: string) {
+export function useBgmSelector(open: boolean) {
   const [presets, setPresets] = useState<BgmPreset[]>([])
   const [loading, setLoading] = useState(false)
   const [activeCategory, setActiveCategory] = useState<BgmCategory | "all">("all")
@@ -30,23 +30,19 @@ export function useBgmSelector(open: boolean, templateId?: string) {
 
   /* ── 加载 BGM 列表 ── */
   const loadPresets = useCallback(async () => {
-    if (!templateId) {
-      setPresets([])
-      return
-    }
     setLoading(true)
     try {
       const params: { category?: string; keyword?: string } = {}
       if (activeCategory !== "all") params.category = activeCategory
       if (keyword.trim()) params.keyword = keyword.trim()
-      const data = await getBgmPresets(templateId, params)
+      const data = await getBgmPresets(params)
       setPresets(data)
     } catch {
       message.error("加载 BGM 列表失败")
     } finally {
       setLoading(false)
     }
-  }, [activeCategory, keyword, templateId])
+  }, [activeCategory, keyword])
 
   useEffect(() => {
     if (open) loadPresets()

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

@@ -171,7 +171,6 @@ const GeneratePage: React.FC = () => {
     autoSubtitles,
     bgm,
     generateCount,
-    sourceEditPlanId: editPlanId,
   })
 
   /* ================================================================

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

@@ -17,7 +17,7 @@ import {
 import type { AssetItem } from "@/api/assets"
 import type { EditingTemplate } from "@/api/editing-planner"
 import { useSegmentScheduler, type PlaybackSegment } from "../hooks/useSegmentScheduler"
-import { useCanvasPlayer } from "../hooks/useCanvasPlayer"
+import { useCanvasPlayer, isWebCodecsSupported } from "../hooks/useCanvasPlayer"
 
 interface FrontendPreviewPlayerProps {
   assets: AssetItem[]
@@ -82,9 +82,7 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
   titleSettings,
 }) => {
   const segments = useMemo(() => buildPlaybackSegments(assets, template), [assets, template])
-  // 默认走原生 video 播放（浏览器硬件解码，独立线程，不阻塞 UI）
-  // WebCodecs 仅在明确需要时启用（保留代码作为兜底）
-  const useWebCodecs = false
+  const useWebCodecs = isWebCodecsSupported()
 
   // ── 两条路径共用同一个 canvas ref（fallback 路径不使用） ──
   const canvasRef = useRef<HTMLCanvasElement>(null)
@@ -124,10 +122,9 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
 
   const { state: canvasState, controls: canvasControls } = useCanvasPlayer(
     canvasRef,
-    useWebCodecs && !forceVideoFallback ? canvasSegments : [],
+    canvasSegments,
     useWebCodecs && !forceVideoFallback ? canvasTitle : undefined,
     handleCanvasError,
-    useWebCodecs && !forceVideoFallback,
   )
 
   // WebCodecs 报告解码失败时自动切换到 video fallback
@@ -198,9 +195,7 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
     const audio = audioRef.current
     if (!audio || !audio.src || !isPlaying) return
     audio.currentTime = currentTime
-    // 注意：不要把 currentTime 放进依赖数组，否则每200ms会重置音频位置导致卡顿
-    // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [segmentSyncKey, isPlaying])
+  }, [segmentSyncKey, isPlaying, currentTime])
 
   const handleSeekTo = useCallback(
     (time: number) => {
@@ -270,8 +265,32 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
 
   const progressPercent = totalDuration > 0 ? (currentTime / totalDuration) * 100 : 0
 
-  // ── Canvas 容器 ref（保留声明，WebCodecs 兜底路径仍引用） ──
+  // ── Canvas ResizeObserver ──
   const canvasContainerRef = useRef<HTMLDivElement>(null)
+  useEffect(() => {
+    if (!effectiveUseWebCodecs || !canPlay) return
+    const container = canvasContainerRef.current
+    const canvas = canvasRef.current
+    if (!container || !canvas) return
+    // 立即设置一次 canvas 像素分辨率，避免默认 300×150 导致首帧变形
+    const initRect = container.getBoundingClientRect()
+    if (initRect.width > 0 && initRect.height > 0) {
+      const dpr = window.devicePixelRatio || 1
+      canvas.width = initRect.width * dpr
+      canvas.height = initRect.height * dpr
+    }
+    const ro = new ResizeObserver((entries) => {
+      for (const entry of entries) {
+        const { width, height } = entry.contentRect
+        if (width > 0 && height > 0) {
+          canvas.width = width * window.devicePixelRatio
+          canvas.height = height * window.devicePixelRatio
+        }
+      }
+    })
+    ro.observe(container)
+    return () => ro.disconnect()
+  }, [effectiveUseWebCodecs, canPlay])
 
   // ── 未就绪 ──
   if (!ready || !assets.length) {
@@ -366,7 +385,7 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
         </div>
       )}
 
-      {/* ── Video 渲染层（默认路径，浏览器原生硬件解码） ── */}
+      {/* ── Video 渲染层（fallback 路径，或 WebCodecs 解码失败时自动切换） ── */}
       {!effectiveUseWebCodecs &&
         segments.map((seg, i) => (
           <video
@@ -375,7 +394,9 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
             ref={(el) => {
               videoRefs.current[i] = el
             }}
-            preload="auto"
+            preload={
+              i === videoCurrentSegIdx ? "auto" : i === videoCurrentSegIdx + 1 ? "metadata" : "none"
+            }
             src={seg.videoUrl}
             style={{
               position: "absolute",
@@ -434,7 +455,11 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
           zIndex: 10,
         }}
       >
-        {`片段 ${videoCurrentSegIdx + 1}/${segments.length}`}
+        {effectiveUseWebCodecs
+          ? "Canvas"
+          : forceVideoFallback
+            ? "Canvas 解码失败，已切换原生播放"
+            : `片段 ${videoCurrentSegIdx + 1}/${segments.length}`}
       </div>
 
       {/* 控制条 */}

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

@@ -123,10 +123,6 @@ export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) =
     presetVoices,
   } = props
 
-  /* 当前模板的 segments，传给 Step2 构建 clips */
-  const currentTemplate = userTemplates.find((t) => t.id === selectedTemplate)
-  const templateSegments = currentTemplate?.segments
-
   switch (currentStep) {
     case 1:
       return (
@@ -145,8 +141,6 @@ export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) =
           onSelectedMaterialsChange={onSelectedMaterialsChange}
           smartSelectedIds={smartSelectedIds}
           onSmartSelectedIdsChange={onSmartSelectedIdsChange}
-          selectedTemplate={selectedTemplate}
-          templateSegments={templateSegments}
         />
       )
     case 3:
@@ -162,7 +156,6 @@ export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) =
         <Step4TitleSettings
           titleSettings={titleSettings}
           onTitleSettingsChange={onTitleSettingsChange}
-          selectedTemplate={selectedTemplate}
         />
       )
     case 5:
@@ -189,7 +182,6 @@ export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) =
           duration={duration}
           assetIds={materialMode === "auto" ? smartSelectedIds : selectedMaterials}
           selectedTemplate={selectedTemplate}
-          titleSettings={titleSettings}
         />
       )
     case 7:

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

@@ -16,7 +16,6 @@ import { LoadingOutlined } from "@ant-design/icons"
 import type { AssetItem } from "@/api/assets"
 import type { EditingTemplate } from "@/api/editing-planner"
 import type { TitleSettings } from "../types"
-import { getFontFamily } from "../constants"
 import FrontendPreviewPlayer from "./FrontendPreviewPlayer"
 
 interface PreviewVideoPanelProps {
@@ -88,7 +87,7 @@ function buildTitleStyle(settings: TitleSettings, containerHeight: number): Reac
       : (Math.min(settings.size, 96) / ASS_VIDEO_HEIGHT) * 400 // fallback
 
   const base: React.CSSProperties = {
-    fontFamily: getFontFamily(settings.font),
+    fontFamily: settings.font || "思源黑体",
     fontSize: `${fontSizePx}px`,
     color: settings.color || "#ffffff",
     fontWeight: settings.bold ? 700 : 400,
@@ -177,12 +176,7 @@ const TitleOverlay: React.FC<{ titleSettings: TitleSettings }> = ({ titleSetting
           position: "absolute",
         }}
       >
-        {displayTitle.split("/").map((part, i) => (
-          <span key={i}>
-            {i > 0 && <br />}
-            {part}
-          </span>
-        ))}
+        {displayTitle}
       </div>
     </div>
   )

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

@@ -2,7 +2,6 @@
  * Step 2 素材选择组件
  */
 import React from "react"
-import type { TemplateSegment } from "@/api/templates/types"
 import { useStep2Materials } from "../hooks/useStep2Materials"
 import MaterialModeTabs from "./material/MaterialModeTabs"
 import ManualMaterialList from "./material/ManualMaterialList"
@@ -16,10 +15,6 @@ interface Step2MaterialSelectProps {
   onSelectedMaterialsChange: (ids: string[]) => void
   smartSelectedIds: string[]
   onSmartSelectedIdsChange: (ids: string[]) => void
-  /** 当前选中的模板/草稿 ID，用于自动保存 */
-  selectedTemplate?: string
-  /** 当前模板的 segments（用于构建 clips duration） */
-  templateSegments?: TemplateSegment[]
 }
 
 const Step2MaterialSelect: React.FC<Step2MaterialSelectProps> = (props) => {

apps/web/src/pages/generate/components/Step4TitleSettings.tsx

@@ -12,8 +12,6 @@ import AiTitleGenerator from "./title/AiTitleGenerator"
 interface Step4TitleSettingsProps {
   titleSettings: TitleSettings
   onTitleSettingsChange: (settings: TitleSettings) => void
-  /** 当前选中的模板/草稿 ID，用于自动保存 */
-  selectedTemplate?: string
 }
 
 const Step4TitleSettings: React.FC<Step4TitleSettingsProps> = (props) => {

apps/web/src/pages/generate/components/Step5VoiceSelect.tsx

@@ -17,16 +17,6 @@ interface Step5VoiceSelectProps {
 }
 
 /** 格式化时长 mm:ss */
-/** 获取素材实际时长（优先顶层 duration，fallback 到 metadata.duration） */
-const getDuration = (item: AssetItem): number => {
-  return item.duration ?? (item.metadata?.duration as number) ?? 0
-}
-
-/** 获取素材实际文件大小 */
-const getFileSize = (item: AssetItem): number => {
-  return item.file_size ?? (item.metadata?.file_size as number) ?? 0
-}
-
 const formatDuration = (seconds?: number): string => {
   if (!seconds || seconds <= 0) return "00:00"
   const m = Math.floor(seconds / 60)
@@ -99,7 +89,7 @@ const Step5VoiceSelect: React.FC<Step5VoiceSelectProps> = ({
       // 如果启用了时长校验，且配音时长不足
       if (totalVideoDuration > 0) {
         const material = materials.find((m) => m.id === id)
-        if (material && getDuration(material) < totalVideoDuration) {
+        if (material && (material.duration || 0) < totalVideoDuration) {
           setPendingVoiceId(id)
           setDurationWarningOpen(true)
           return
@@ -281,24 +271,25 @@ const Step5VoiceSelect: React.FC<Step5VoiceSelectProps> = ({
                 }}
               >
                 <span style={{ display: "flex", alignItems: "center", gap: 4 }}>
-                  {formatDuration(getDuration(item))}
-                  {totalVideoDuration > 0 && getDuration(item) < Number(totalVideoDuration) && (
-                    <span
-                      style={{
-                        color: "#ff4d4f",
-                        fontSize: 11,
-                        fontWeight: 500,
-                        display: "inline-flex",
-                        alignItems: "center",
-                        gap: 2,
-                      }}
-                    >
-                      <WarningOutlined />
-                      时长不足
-                    </span>
-                  )}
+                  {formatDuration(item.duration)}
+                  {totalVideoDuration > 0 &&
+                    (Number(item.duration) || 0) < Number(totalVideoDuration) && (
+                      <span
+                        style={{
+                          color: "#ff4d4f",
+                          fontSize: 11,
+                          fontWeight: 500,
+                          display: "inline-flex",
+                          alignItems: "center",
+                          gap: 2,
+                        }}
+                      >
+                        <WarningOutlined />
+                        时长不足
+                      </span>
+                    )}
                 </span>
-                <span>{formatFileSize(getFileSize(item))}</span>
+                <span>{formatFileSize(item.file_size)}</span>
               </div>
             </div>
           )
@@ -327,9 +318,7 @@ const Step5VoiceSelect: React.FC<Step5VoiceSelectProps> = ({
           return (
             <p>
               该配音时长（
-              <strong>
-                {pendingMaterial ? formatDuration(getDuration(pendingMaterial)) : "--"}
-              </strong>
+              <strong>{pendingMaterial ? formatDuration(pendingMaterial.duration) : "--"}</strong>
               ）短于视频总时长（
               <strong>{formatDuration(totalVideoDuration)}</strong>
               ），播放时配音可能提前结束，建议选择更长的配音素材。

apps/web/src/pages/generate/components/Step6CoverSettings.tsx

@@ -14,8 +14,6 @@ interface Step6CoverSettingsProps {
   assetIds?: string[]
   /** 当前选中的模板 ID */
   selectedTemplate?: string
-  /** Step4 标题设置，用于预览视频烧录标题 & 封面叠加标题 */
-  titleSettings?: import("../types").TitleSettings
 }
 
 const Step6CoverSettings: React.FC<Step6CoverSettingsProps> = (props) => {
@@ -42,7 +40,6 @@ const Step6CoverSettings: React.FC<Step6CoverSettingsProps> = (props) => {
     duration: props.duration,
     assetIds: props.assetIds,
     selectedTemplate: props.selectedTemplate,
-    titleSettings: props.titleSettings,
   })
 
   const handleAutoGenerate = () => {

apps/web/src/pages/generate/components/title/TitlePresetsGrid.tsx

@@ -2,7 +2,6 @@
  * 标题预设样式网格
  */
 import React from "react"
-import { getFontFamily } from "../../constants"
 
 interface TitlePresetItem {
   key: string
@@ -36,7 +35,7 @@ const TitlePresetsGrid: React.FC<TitlePresetsGridProps> = ({
           >
             <span
               className="xx-title-preset-preview-text"
-              style={{ ...p.previewStyle, fontFamily: getFontFamily(fontFamily || "思源黑体") }}
+              style={{ ...p.previewStyle, ...(fontFamily ? { fontFamily } : {}) }}
             >
               标题
             </span>

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

@@ -56,21 +56,6 @@ export const FONT_OPTIONS = [
   "华康俪金黑",
 ]
 
-/* ── 标题字体 CSS font-family 映射（中文显示名 → 浏览器可识别的字体栈） ── */
-export const FONT_FAMILY_MAP: Record<string, string> = {
-  思源黑体: '"Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif',
-  思源宋体: '"Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", serif',
-  苹方: '"PingFang SC", -apple-system, "Helvetica Neue", sans-serif',
-  PingFang: '"PingFang SC", -apple-system, "Helvetica Neue", sans-serif',
-  微软雅黑: '"Microsoft YaHei", "PingFang SC", sans-serif',
-  楷体: '"KaiTi", "STKaiti", "DFKai-SB", serif',
-  华康俪金黑: '"华康俪金黑", "DFLiJinHei-W8", "Source Han Sans SC", "Microsoft YaHei", sans-serif',
-}
-
-export function getFontFamily(font: string): string {
-  return FONT_FAMILY_MAP[font] || FONT_FAMILY_MAP["思源黑体"]
-}
-
 /* ── 标题样式预设 ── */
 export const TITLE_PRESETS = [
   {

apps/web/src/pages/generate/generate.css

@@ -2309,8 +2309,6 @@
 .xx-cover-preview-box {
   position: relative;
   aspect-ratio: 9 / 16;
-  max-width: 180px;
-  margin: 0 auto;
   background: var(--bg-tertiary);
   border-radius: var(--radius-md);
   overflow: hidden;

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

@@ -19,8 +19,6 @@ export interface UseGenerateVideoProps {
   autoSubtitles: boolean
   bgm: boolean
   generateCount: number
-  /** 当前草稿 ID（URL 参数 edit_plan_id，用于后端回写任务关联） */
-  sourceEditPlanId?: string | null
 }
 
 /** 生成阶段 */

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

@@ -1,146 +1,87 @@
 import { useRef, useCallback } from "react"
 import { message } from "antd"
-import axios from "axios"
-import { getGenerationTask } from "@/api/tasks/tasks"
-import { getGenerationTaskResults } from "@/api/template-editor"
+import { getGenerationStatus, getGenerationTaskResults } from "@/api/template-editor"
 import { safeExtractError } from "./errorUtils"
 
 interface UseGenerationPollingOptions {
+  templateId: string
   onProgress: (progress: number) => void
   onComplete: (videos: unknown[]) => void
   onFailed: (errorMsg: string) => void
 }
 
-/** 最大连续错误次数（仅对可重试错误），超过后终止轮询 */
-const MAX_RETRYABLE_ERRORS = 10
-/** 获取结果的最大重试次数 */
-const MAX_RESULTS_RETRIES = 3
-
 /**
- * 生成状态轮询 Hook（v2 — 改用 /generation/tasks/{task_id}）
- *
- * 旧版轮询 GET /templates/{id}/editor/generation-status 依赖 plan 维度状态，
- * 在编辑流程数据链路断裂时拿不到 task_id。新版直接使用 POST /generation/tasks
- * 返回的 task_id 轮询任务详情，不再依赖 plan。
- *
- * 错误处理：
- * - 4xx（尤其 404）视为不可恢复，立即 onFailed，不再重试
- * - 5xx / 网络错误重试，最多连续 MAX_RETRYABLE_ERRORS 次
- * - 任务完成后获取结果失败会重试 MAX_RESULTS_RETRIES 次，仍失败则 onFailed
+ * 生成状态轮询 Hook
+ * 轮询生成状态，更新进度，处理完成/失败
  */
 export const useGenerationPolling = ({
+  templateId,
   onProgress,
   onComplete,
   onFailed,
 }: UseGenerationPollingOptions) => {
   const progressTimer = useRef<ReturnType<typeof setTimeout>>()
-  const cancelledRef = useRef(false)
 
   const clearTimer = useCallback(() => {
-    cancelledRef.current = true
     if (progressTimer.current) {
       clearTimeout(progressTimer.current)
       progressTimer.current = undefined
     }
   }, [])
 
-  /** 任务完成后拉取结果列表，带重试 */
-  const fetchResultsWithRetry = useCallback(
-    async (taskId: string, attempt = 0): Promise<unknown[] | null> => {
+  const startPolling = useCallback(() => {
+    const poll = async () => {
       try {
-        return await getGenerationTaskResults(taskId)
-      } catch (err) {
-        if (cancelledRef.current) return null
-        console.error(`[获取生成结果失败] 第 ${attempt + 1} 次`, err)
-        if (attempt < MAX_RESULTS_RETRIES - 1) {
-          await new Promise((resolve) => setTimeout(resolve, 1000 * (attempt + 1)))
-          return fetchResultsWithRetry(taskId, attempt + 1)
-        }
-        return null
-      }
-    },
-    [],
-  )
+        const data = await getGenerationStatus(templateId)
 
-  const startPolling = useCallback(
-    (taskId: string) => {
-      cancelledRef.current = false
-      let consecutiveErrors = 0
-
-      const poll = async () => {
-        if (cancelledRef.current) return
-        try {
-          const task = await getGenerationTask(taskId)
-          consecutiveErrors = 0
-
-          if (task.status === "completed") {
-            onProgress(100)
-            const videos = await fetchResultsWithRetry(taskId)
-            if (cancelledRef.current) return
-            if (videos === null) {
-              const errorMsg = "视频已生成，但获取结果列表失败，请稍后在任务列表查看"
-              console.error("[生成结果获取失败] taskId:", taskId)
-              onFailed(errorMsg)
-              message.error(errorMsg)
-              return
+        if (data.plan_status === "completed") {
+          onProgress(100)
+          // 获取生成的视频结果
+          let videos: unknown[] = []
+          if (data.generation_task_id) {
+            try {
+              videos = await getGenerationTaskResults(data.generation_task_id)
+            } catch (err) {
+              console.error("[获取生成结果失败]", err)
             }
-            onComplete(videos)
-            message.success("视频生成完成！")
-            return
           }
-
-          if (task.status === "failed" || task.status === "cancelled") {
-            const rawMsg =
-              task.error_info?.error_message ||
-              task.error_message ||
-              (task.status === "cancelled" ? "任务已取消" : "视频生成失败，请联系管理员或重试")
-            const errorMsg = safeExtractError(rawMsg)
-            console.error("[生成失败] taskId:", taskId, "响应:", task)
-            onFailed(errorMsg)
-            message.error(errorMsg)
-            return
-          }
-
-          // pending / waiting / running — 继续轮询
-          const pct = Math.max(0, Math.min(99, Math.round(Number(task.progress) || 0)))
-          onProgress(pct)
-          progressTimer.current = setTimeout(poll, 2000)
-        } catch (pollErr) {
-          if (cancelledRef.current) return
-          console.error("[轮询出错] taskId:", taskId, pollErr)
-
-          // 4xx 不可恢复，立即失败
-          const status = axios.isAxiosError(pollErr) ? pollErr.response?.status : undefined
-          if (status && status >= 400 && status < 500) {
-            const msg =
-              (axios.isAxiosError(pollErr) &&
-                (pollErr.response?.data as { detail?: string; message?: string } | undefined)
-                  ?.detail) ||
-              (axios.isAxiosError(pollErr) &&
-                (pollErr.response?.data as { detail?: string; message?: string } | undefined)
-                  ?.message) ||
-              `查询任务失败 (${status})`
-            const errorMsg = safeExtractError(msg)
-            onFailed(errorMsg)
-            message.error(errorMsg)
-            return
-          }
-
-          consecutiveErrors += 1
-          if (consecutiveErrors >= MAX_RETRYABLE_ERRORS) {
-            const errorMsg = "任务状态查询连续失败，请稍后在任务列表查看结果"
-            onFailed(errorMsg)
-            message.error(errorMsg)
-            return
-          }
-          progressTimer.current = setTimeout(poll, 3000)
+          onComplete(videos)
+          message.success("视频生成完成！")
+          return
+        }
+        if (data.plan_status === "failed") {
+          const dataAny = data as unknown as Record<string, unknown>
+          const rawMsg =
+            dataAny.error_message ||
+            dataAny.error ||
+            dataAny.message ||
+            (Array.isArray(data.clips)
+              ? (data.clips as { status: string; error_message?: string }[]).find(
+                  (c) => c.status === "failed",
+                )?.error_message
+              : undefined) ||
+            "视频生成失败，请联系管理员或重试"
+          const errorMsg = safeExtractError(rawMsg)
+          console.error("[生成失败] templateId:", templateId, "响应:", data)
+          onFailed(errorMsg)
+          message.error(errorMsg)
+          return
         }
-      }
 
-      progressTimer.current = setTimeout(poll, 1500)
-    },
-    [onProgress, onComplete, onFailed, fetchResultsWithRetry],
-  )
+        const clips = data.clips || []
+        const total = clips.length || 1
+        const done = (clips as { status: string }[]).filter((c) => c.status === "completed").length
+        onProgress(Math.round((done / total) * 100))
+
+        progressTimer.current = setTimeout(poll, 2000)
+      } catch (pollErr) {
+        console.error("[轮询出错] templateId:", templateId, pollErr)
+        progressTimer.current = setTimeout(poll, 3000)
+      }
+    }
+
+    progressTimer.current = setTimeout(poll, 2000)
+  }, [templateId, onProgress, onComplete, onFailed])
 
   return { startPolling, clearTimer }
 }

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

@@ -9,6 +9,8 @@ import { createFile } from "mp4box"
 import type { Movie, Sample } from "mp4box"
 
 // ── 常量 ──
+/** 初始化预解码最大帧数（约 2 秒 @30fps），后续帧通过 decodeAroundPosition 按需解码 */
+const MAX_INIT_FRAMES = 60
 
 /**
  * 规范化 mp4box 提取的 codec 字符串为 WebCodecs 兼容格式
@@ -109,7 +111,7 @@ class FrameQueue {
   private frames: FrameEntry[] = []
   private maxSize: number
 
-  constructor(maxSize = 200) {
+  constructor(maxSize = 5) {
     this.maxSize = maxSize
   }
 
@@ -121,36 +123,24 @@ class FrameQueue {
     this.frames.push(entry)
   }
 
-  /** 获取当前时间戳应显示的帧（二分查找，O(log n)） */
+  /** 获取当前时间戳应显示的帧 */
   getCurrentFrame(timestamp: number): VideoFrame | null {
-    if (this.frames.length === 0) return null
-
-    const target = timestamp + 0.01
-
-    // 找到最后一个 pts <= target 的帧（右边界）
-    let lo = 0,
-      hi = this.frames.length - 1,
-      bestIdx = -1
-    while (lo <= hi) {
-      const mid = (lo + hi) >> 1
-      if (this.frames[mid].pts <= target) {
-        bestIdx = mid
-        lo = mid + 1
-      } else {
-        hi = mid - 1
+    let best: FrameEntry | null = null
+    let bestIdx = -1
+    for (let i = 0; i < this.frames.length; i++) {
+      const f = this.frames[i]
+      if (f.pts <= timestamp + 0.01) {
+        best = f
+        bestIdx = i
       }
     }
-
-    if (bestIdx < 0) return null
-
-    // 关闭并移除 bestIdx 之前的所有已播放帧
     for (let i = 0; i < bestIdx; i++) {
       this.frames[i].frame.close()
     }
-    this.frames.splice(0, bestIdx)
-
-    // 此时 bestIdx 对应帧已在索引 0
-    return this.frames[0]?.frame ?? null
+    if (bestIdx >= 0) {
+      this.frames = this.frames.slice(bestIdx)
+    }
+    return best?.frame ?? null
   }
 
   clear() {
@@ -239,10 +229,9 @@ export function useCanvasPlayer(
     shadow?: boolean
   },
   onError?: (error: Error) => void,
-  enabled: boolean = true,
 ) {
   const [state, setState] = useState<CanvasPlayerState>({
-    hasSupport: enabled && isWebCodecsSupported(),
+    hasSupport: isWebCodecsSupported(),
     isPlaying: false,
     currentTime: 0,
     duration: 0,
@@ -254,13 +243,9 @@ export function useCanvasPlayer(
 
   // ── 内部引用 ──
   const decoderRef = useRef<VideoDecoder | null>(null)
-  const frameQueueRef = useRef(new FrameQueue(200))
-  /** 每个片段持久化解码器，避免每次新建导致关键帧错误 */
-  const segmentDecodersRef = useRef(new Map<number, VideoDecoder>())
-  /** 每个片段已送入解码器的 sample 游标（用于续解码） */
-  const segmentSampleCursorRef = useRef(new Map<number, number>())
-  /** 后台补充解码是否正在运行（防重入） */
-  const isFeedingRef = useRef(false)
+  const frameQueueRef = useRef(new FrameQueue(600))
+  /** 已解码的片段索引集合，用于按需解码（先标记防重入，失败时移除允许重试） */
+  const decodedSegmentsRef = useRef(new Set<number>())
   /** 解码代数计数器，seek 时递增以作废正在进行的异步解码 */
   const decodeGenerationRef = useRef(0)
   const rafRef = useRef<number>(0)
@@ -490,91 +475,115 @@ export function useCanvasPlayer(
     [segments, extractCodecDescription],
   )
 
-  // ── 解码片段的一批帧（使用持久化解码器，支持从断点续解码） ──
-  /**
-   * @param segIdx 片段索引
-   * @param maxFrames 本次最多解码多少帧
-   */
-  const decodeSegmentBatch = useCallback(
-    async (segIdx: number, maxFrames: number = 60): Promise<number> => {
-      if (isDestroyedRef.current) return 0
-      const metas = segmentMetaRef.current
-      const meta = metas[segIdx]
-      if (!meta) return 0
-      const buffer = segmentDataRef.current.get(meta.assetId)
-      if (!buffer) return 0
+  // ── 初始化 VideoDecoder 并解码指定片段 ──
+  const decodeSegment = useCallback(
+    async (_buffer: ArrayBuffer, meta: SegmentMeta, maxFrames?: number): Promise<void> => {
+      if (isDestroyedRef.current) return
 
-      const gen = decodeGenerationRef.current
-      let decoder = segmentDecodersRef.current.get(segIdx)
-      let cursor = segmentSampleCursorRef.current.get(segIdx) ?? 0
-      const samples = meta.samples
+      let decoderReady = false
 
-      // 如果还没有解码器，新建一个（从关键帧开始，不会报 key frame 错误）
-      if (!decoder || decoder.state === "closed") {
-        decoder = new VideoDecoder({
-          output: (frame: VideoFrame) => {
-            if (videoDimRef.current.width === 0 || videoDimRef.current.height === 0) {
-              videoDimRef.current = { width: frame.codedWidth, height: frame.codedHeight }
-            }
-            const localTime = frame.timestamp / 1_000_000
-            const globalTime = localTime + meta.globalStartTime
-            frameQueueRef.current.push({
-              frame,
-              pts: globalTime,
-              duration: (frame.duration ?? 0) / 1_000_000,
-            })
-          },
-          error: (e: DOMException) => {
-            console.error(`[useCanvasPlayer] Segment ${segIdx} decoder error:`, e)
-            // 重置该片段的解码器和游标，允许重试
-            segmentDecodersRef.current.delete(segIdx)
-            segmentSampleCursorRef.current.set(segIdx, 0)
-          },
-        })
-
-        try {
-          await decoder.configure({
-            codec: meta.codec,
-            ...(meta.description ? { description: meta.description } : {}),
+      // 配置解码器（每个片段可能需要不同的 codec/分辨率）
+      const decoder = new VideoDecoder({
+        output: (frame: VideoFrame) => {
+          // 从第一帧获取实际尺寸
+          if (videoDimRef.current.width === 0 || videoDimRef.current.height === 0) {
+            videoDimRef.current = { width: frame.codedWidth, height: frame.codedHeight }
+            console.log(
+              `[useCanvasPlayer] Actual frame size: ${frame.codedWidth}x${frame.codedHeight}`,
+            )
+          }
+          const localTime = frame.timestamp / 1_000_000
+          const globalTime = localTime + meta.globalStartTime
+          frameQueueRef.current.push({
+            frame,
+            pts: globalTime,
+            duration: (frame.duration ?? 0) / 1_000_000,
           })
-        } catch (err) {
-          console.error(`[useCanvasPlayer] Segment ${segIdx} configure failed:`, err)
-          const error = err instanceof Error ? err : new Error(String(err))
+        },
+        error: (e: DOMException) => {
+          console.error("[useCanvasPlayer] Decoder error callback:", e)
+          const error = new Error(`VideoDecoder error: ${e.message || e.name || "unknown"}`)
           setState((s) => ({
             ...s,
             isBuffering: false,
             hasDecodeError: true,
-            errorMessage: `视频解码失败: ${error.message || "不支持的编解码器"}`,
+            errorMessage: `视频解码器错误: ${e.message || "解码异常"}`,
           }))
           onErrorRef.current?.(error)
-          return 0
-        }
+        },
+      })
 
-        segmentDecodersRef.current.set(segIdx, decoder)
-        cursor = 0
-        // 标记缓冲结束
+      console.log("[useCanvasPlayer] configure:", {
+        codec: meta.codec,
+        description: meta.description,
+        descriptionByteLength: meta.description?.byteLength,
+        videoWidth: meta.videoWidth,
+        videoHeight: meta.videoHeight,
+        codecCharCodes: meta.codec.split("").map((c) => c.charCodeAt(0)),
+      })
+
+      try {
+        await decoder.configure({
+          codec: meta.codec,
+          ...(meta.description ? { description: meta.description } : {}),
+        })
+        decoderRef.current = decoder
+        decoderReady = true
+        // 标记缓冲结束，让 UI 开始渲染
         setState((s) => ({ ...s, isBuffering: false }))
+      } catch (err) {
+        const error = err instanceof Error ? err : new Error(String(err))
+        console.error(
+          "[useCanvasPlayer] Decoder configure failed for segment:",
+          meta.assetId,
+          error,
+        )
+        console.error("[useCanvasPlayer] Failed codec config:", {
+          codec: meta.codec,
+          descriptionByteLength: meta.description?.byteLength,
+          videoWidth: meta.videoWidth,
+          videoHeight: meta.videoHeight,
+        })
+        setState((s) => ({
+          ...s,
+          isBuffering: false,
+          isReady: false,
+          hasDecodeError: true,
+          errorMessage: `视频解码失败: ${error.message || "不支持的编解码器"}`,
+        }))
+        onErrorRef.current?.(error)
+        return
       }
 
-      if (decoder.state !== "configured") return 0
+      if (!decoderReady) return
 
-      // 从 cursor 继续喂 sample（流水线批量提交，不 await 单个 decode）
-      let decoded = 0
-      let si = cursor
-      while (si < samples.length && decoded < maxFrames) {
-        if (decodeGenerationRef.current !== gen || isDestroyedRef.current) break
-        if ((decoder.state as string) === "closed") break
-        // 帧队列快满时停止提交（这才是真正的背压）
-        if (frameQueueRef.current.size >= 180) break
-        // 解码器内部队列积压过多时短暂让出线程（阈值64，给硬件足够流水线深度）
-        if (decoder.decodeQueueSize > 64) {
-          await new Promise((r) => setTimeout(r, 5))
+      // 使用 demuxSegment 中已提取并过滤的 samples（前端切片）
+      const samplesCollected = meta.samples
+      console.log(
+        `[useCanvasPlayer] Segment ${meta.assetId}: ${samplesCollected.length} samples to decode`,
+      )
+      if (samplesCollected.length === 0) {
+        console.warn("[useCanvasPlayer] No samples to decode for segment", meta.assetId)
+        return
+      }
+
+      // 送入解码器
+      let decodedCount = 0
+      let skippedCount = 0
+      let decodeErrors = 0
+      for (const sample of samplesCollected) {
+        if (!sample.data || isDestroyedRef.current) {
+          skippedCount++
           continue
         }
-
-        const sample = samples[si]
-        si++
-        if (!sample.data) continue
+        if (decoder.state === "closed") break
+        // 初始化阶段限制解码帧数，避免帧缓冲溢出
+        if (maxFrames && decodedCount >= maxFrames) {
+          console.log(
+            `[useCanvasPlayer] Segment ${meta.assetId}: init decode limited to ${maxFrames} frames`,
+          )
+          break
+        }
 
         const chunk = new EncodedVideoChunk({
           type: sample.is_sync ? "key" : "delta",
@@ -584,73 +593,93 @@ export function useCanvasPlayer(
         })
 
         try {
-          decoder.decode(chunk)
-          decoded++
+          await decoder.decode(chunk) // 修复：await 捕获异步错误
+          decodedCount++
         } catch (e) {
-          console.warn(`[useCanvasPlayer] Segment ${segIdx} decode error:`, e)
-          break
-        }
-      }
-
-      cursor = si
-      segmentSampleCursorRef.current.set(segIdx, cursor)
-      // 等待解码器输出帧（最多500ms）
-      if (decoded > 0 && (decoder.state as string) === "configured") {
-        let waited = 0
-        while (frameQueueRef.current.size < Math.min(decoded, 10) && waited < 500) {
-          await new Promise((r) => setTimeout(r, 20))
-          waited += 20
-          if (isDestroyedRef.current) break
+          decodeErrors++
+          console.warn(`[useCanvasPlayer] Decode chunk error (${decodeErrors}):`, e)
+          // 连续 3 次解码失败，放弃当前片段并报告错误
+          if (decodeErrors >= 3) {
+            console.error("[useCanvasPlayer] Too many decode errors, aborting segment")
+            const error = new Error(`视频解码连续失败 ${decodeErrors} 次，片段: ${meta.assetId}`)
+            setState((s) => ({
+              ...s,
+              isBuffering: false,
+              hasDecodeError: true,
+              errorMessage: `视频解码失败: 连续 ${decodeErrors} 次错误`,
+            }))
+            onErrorRef.current?.(error)
+            break
+          }
         }
       }
       console.log(
-        `[useCanvasPlayer] Segment ${segIdx} decoded ${decoded} frames, queue size: ${frameQueueRef.current.size}`,
+        `[useCanvasPlayer] Segment ${meta.assetId}: decoded ${decodedCount}, skipped ${skippedCount}, errors ${decodeErrors}, decoder.state=${decoder.state}`,
       )
-      return decoded
+
+      // flush 仅在解码器状态正常时执行
+      if (decoder.state === "configured") {
+        try {
+          await decoder.flush()
+          console.log(`[useCanvasPlayer] Segment ${meta.assetId}: flush complete`)
+        } catch (e) {
+          console.warn("[useCanvasPlayer] Decoder flush error:", e)
+        }
+      }
     },
     [],
   )
 
-  // ── 后台持续补充帧 ──
   /**
-   * 根据当前播放时间，确保队列中有足够缓冲
-   * 播放循环每 200ms 调用一次
+   * 按需解码当前播放位置 ±1 个片段。
+   * 在渲染循环中定期调用，避免一次性解码所有片段导致环形缓冲区溢出丢帧。
+   * 使用"先标记再解码"模式防止并发重复解码，失败时移除标记允许重试。
    */
-  const feedFrames = useCallback(
+  const decodeAroundPosition = useCallback(
     async (currentTime: number) => {
-      if (isFeedingRef.current) return
-      isFeedingRef.current = true
-      try {
-        const metas = segmentMetaRef.current
-        if (!metas || metas.length === 0) return
+      const metas = segmentMetaRef.current
+      if (!metas || metas.length === 0) return
 
-        // 队列帧数充足时不解码（目标：保持 >= 80 帧缓冲）
-        if (frameQueueRef.current.size >= 80) return
+      // 记录当前代数，seek 后代数变化则中止
+      const gen = decodeGenerationRef.current
 
-        // 找到当前播放的片段
-        let targetIdx = 0
-        let acc = 0
-        for (let i = 0; i < metas.length; i++) {
-          const dur = metas[i].globalEndTime - metas[i].globalStartTime
-          if (currentTime < acc + dur) {
-            targetIdx = i
-            break
-          }
-          acc += dur
+      let targetIdx = -1
+      let acc = 0
+      for (let i = 0; i < metas.length; i++) {
+        const dur = metas[i].globalEndTime - metas[i].globalStartTime
+        if (currentTime < acc + dur) {
+          targetIdx = i
+          break
         }
+        acc += dur
+      }
+      if (targetIdx === -1) targetIdx = metas.length - 1
 
-        // 依次补充：当前片段 → 下一个片段 → 再下一个
-        for (let offset = 0; offset <= 2; offset++) {
-          const idx = targetIdx + offset
-          if (idx >= metas.length) break
-          if (frameQueueRef.current.size >= 180) break
-          await decodeSegmentBatch(idx, 60)
+      for (
+        let i = Math.max(0, targetIdx - 1);
+        i <= Math.min(metas.length - 1, targetIdx + 1);
+        i++
+      ) {
+        // seek 已作废当前解码任务
+        if (decodeGenerationRef.current !== gen) return
+        if (decodedSegmentsRef.current.has(i)) continue
+        const meta = metas[i]
+        const buffer = segmentDataRef.current.get(meta.assetId)
+        if (!buffer) continue
+        // 先标记为解码中，防止下一帧渲染时重复发起解码
+        decodedSegmentsRef.current.add(i)
+        try {
+          await decodeSegment(buffer, meta, 300)
+        } catch (e) {
+          // 解码失败则移除标记，允许后续重试
+          decodedSegmentsRef.current.delete(i)
+          console.warn(`[useCanvasPlayer] 按需解码片段 ${i} 失败:`, e)
         }
-      } finally {
-        isFeedingRef.current = false
+        // await 后再次检查代数，seek 期间不更新标记
+        if (decodeGenerationRef.current !== gen) return
       }
     },
-    [decodeSegmentBatch],
+    [decodeSegment],
   )
 
   // ── 标题绘制 ──
@@ -667,6 +696,7 @@ export function useCanvasPlayer(
 
       // 按 "/" 分割为多行（"/" 作为手动换行符）
       const lines = title.text.split(/[/／⁄∕]/)
+      console.log("[drawTitle] 原始标题:", JSON.stringify(title.text), "分割后:", lines)
       const lineHeight = fontSize * 1.3
       const totalHeight = lines.length * lineHeight
 
@@ -778,10 +808,8 @@ export function useCanvasPlayer(
         }
         return s
       })
-      // 后台补充帧：队列不足时自动续解码
-      if (frameQueueRef.current.size < 80) {
-        void feedFrames(currentTime)
-      }
+      // 按需解码当前 ±1 片段
+      decodeAroundPosition(currentTime)
     }
 
     if (currentTime >= totalDuration) {
@@ -790,46 +818,29 @@ export function useCanvasPlayer(
     }
 
     rafRef.current = requestAnimationFrame(renderFrame)
-  }, [canvasRef, totalDuration, titleSettings, drawTitle, computeDrawRect, feedFrames])
+  }, [canvasRef, totalDuration, titleSettings, drawTitle, computeDrawRect, decodeAroundPosition])
 
   // ── 播放控制 ──
   const play = useCallback(async () => {
     if (!state.hasSupport || isDestroyedRef.current) return
 
-    // 重播：必须关闭旧解码器、清空队列、重置游标，从头重新解码
-    if (state.currentTime >= totalDuration - 0.1 || state.currentTime <= 0.1) {
+    // 重播场景：currentTime 已回到起点但 decodedSegmentsRef 仍有旧标记
+    // 此时 FrameQueue 中旧帧已被淘汰，需清空标记让 decodeAroundPosition 重新解码
+    if (state.currentTime <= 0.1 && decodedSegmentsRef.current.size > 0) {
       decodeGenerationRef.current++
-      // 关闭所有持久化解码器
-      for (const d of segmentDecodersRef.current.values()) {
-        try {
-          if (d.state !== "closed") d.close()
-        } catch {
-          /* noop */
-        }
-      }
-      segmentDecodersRef.current.clear()
-      segmentSampleCursorRef.current.clear()
+      decodedSegmentsRef.current.clear()
+      // 同步清空帧缓冲，避免旧帧残留导致 getCurrentFrame 返回 null
       frameQueueRef.current.clear()
-      playStartOffsetRef.current = 0
-      setState((s) => ({ ...s, currentTime: 0 }))
-      // 重新初始化解码
-      const metas = segmentMetaRef.current
-      const initialDecodeCount = Math.min(metas.length, 2)
-      for (let i = 0; i < initialDecodeCount; i++) {
-        await decodeSegmentBatch(i, 60)
-      }
     }
 
     setState((s) => ({ ...s, isPlaying: true }))
     playStartRef.current = performance.now()
-    if (state.currentTime < 0.1) {
-      playStartOffsetRef.current = 0
-    } else {
-      playStartOffsetRef.current = state.currentTime
-    }
+    playStartOffsetRef.current = state.currentTime
     lastProgressUpdateRef.current = 0
     rafRef.current = requestAnimationFrame(renderFrame)
-  }, [state.hasSupport, state.currentTime, totalDuration, renderFrame, decodeSegmentBatch])
+    // 立即触发一次按需解码，不等渲染循环 200ms 节流
+    decodeAroundPosition(state.currentTime)
+  }, [state.hasSupport, state.currentTime, renderFrame, decodeAroundPosition])
 
   const pause = useCallback(() => {
     setState((s) => ({ ...s, isPlaying: false }))
@@ -839,61 +850,33 @@ export function useCanvasPlayer(
   const seek = useCallback(
     async (time: number) => {
       const clampedTime = Math.max(0, Math.min(time, totalDuration))
-      decodeGenerationRef.current++
-      // 关闭所有解码器、清空队列、重置游标
-      for (const d of segmentDecodersRef.current.values()) {
-        try {
-          if (d.state !== "closed") d.close()
-        } catch {
-          /* noop */
-        }
-      }
-      segmentDecodersRef.current.clear()
-      segmentSampleCursorRef.current.clear()
-      frameQueueRef.current.clear()
       setState((s) => ({ ...s, currentTime: clampedTime }))
       playStartOffsetRef.current = clampedTime
       playStartRef.current = performance.now()
-      // 找到 seek 目标片段，从该片段开始解码
-      const metas = segmentMetaRef.current
-      let targetIdx = 0,
-        acc = 0
-      for (let i = 0; i < metas.length; i++) {
-        const dur = metas[i].globalEndTime - metas[i].globalStartTime
-        if (clampedTime < acc + dur) {
-          targetIdx = i
-          break
-        }
-        acc += dur
-      }
-      await decodeSegmentBatch(targetIdx, 60)
-      await decodeSegmentBatch(Math.min(targetIdx + 1, metas.length - 1), 60)
+      // seek 时递增解码代数，作废正在进行的异步解码
+      decodeGenerationRef.current++
+      // 清空帧队列（clear 内部会 close 所有帧）+ 清空已解码标记
+      frameQueueRef.current.clear()
+      decodedSegmentsRef.current.clear()
+      await decodeAroundPosition(clampedTime)
     },
-    [totalDuration, decodeSegmentBatch],
+    [totalDuration, decodeAroundPosition],
   )
 
   const destroy = useCallback(() => {
     isDestroyedRef.current = true
     cancelAnimationFrame(rafRef.current)
 
-    // 关闭所有持久化解码器
-    for (const d of segmentDecodersRef.current.values()) {
-      try {
-        if (d.state !== "closed") d.close()
-      } catch {
-        /* noop */
-      }
-    }
-    segmentDecodersRef.current.clear()
-    segmentSampleCursorRef.current.clear()
-
     if (decoderRef.current && decoderRef.current.state !== "closed") {
       decoderRef.current.close()
     }
 
+    // 递增代数中止进行中的异步解码，清空帧队列（clear 内部 close 所有帧）
+    decodeGenerationRef.current++
     frameQueueRef.current.clear()
     segmentDataRef.current.clear()
     segmentMetaRef.current = []
+    decodedSegmentsRef.current.clear()
   }, [])
 
   // ── 预加载下一个片段的数据 ──
@@ -910,7 +893,6 @@ export function useCanvasPlayer(
 
   // ── 初始化：加载并解码所有片段 ──
   useEffect(() => {
-    if (!enabled) return
     if (!state.hasSupport || segments.length === 0) {
       console.log("[useCanvasPlayer] Skip init:", {
         hasSupport: state.hasSupport,
@@ -920,24 +902,10 @@ export function useCanvasPlayer(
     }
 
     let cancelled = false
+    console.log("[useCanvasPlayer] Init start, segments:", segments.length)
 
     const init = async () => {
-      // ✅ 关键修复：重置销毁标记，允许新的 init 周期正常工作
-      // destroy() 在 useEffect cleanup 中被调用，将 isDestroyedRef 设为 true
-      // 如果不重置，后续的 loadSegment / decodeSegment 会立即 return
-      isDestroyedRef.current = false
-      // ✅ Strict Mode 修复：init 不再递增 generation
-      // seek() 和 play() 仍保留 generation 递增用于中止异步解码
-      // 重置错误状态，避免上一轮的解码错误影响新的 init 周期
-      setState((s) => ({
-        ...s,
-        isBuffering: true,
-        hasDecodeError: false,
-        errorMessage: "",
-        isReady: false,
-      }))
-
-      console.log("[useCanvasPlayer] Init start v2_DIAG, segments:", segments.length)
+      setState((s) => ({ ...s, isBuffering: true }))
 
       // 1. 加载所有片段数据
       for (const seg of segments) {
@@ -979,44 +947,32 @@ export function useCanvasPlayer(
 
       segmentMetaRef.current = metas
 
-      // 3. 初始化解码：关闭旧解码器，前 2 个片段各解 60 帧
-      //    后续由 feedFrames 后台补充
-      for (const d of segmentDecodersRef.current.values()) {
-        try {
-          if (d.state !== "closed") d.close()
-        } catch {
-          /* noop */
-        }
-      }
-      segmentDecodersRef.current.clear()
-      segmentSampleCursorRef.current.clear()
-      frameQueueRef.current.clear()
-
+      // 3. 按需解码：初始只解码前 3 个片段，后续通过 decodeAroundPosition 动态加载
+      //    避免一次性全量解码导致 frameQueue 环形缓冲区旧帧被丢弃引发黑屏
+      decodedSegmentsRef.current.clear()
       const initGen = decodeGenerationRef.current
-      const initialDecodeCount = Math.min(metas.length, 2)
-      console.log(
-        `[useCanvasPlayer] Starting init decode: ${initialDecodeCount} segments, metas: ${metas.length}`,
-      )
+      const initialDecodeCount = Math.min(metas.length, 3)
       for (let i = 0; i < initialDecodeCount; i++) {
         if (cancelled) break
+        // seek 或 destroy 已作废当前初始化
         if (decodeGenerationRef.current !== initGen) break
-        console.log(`[DIAG_v2] Init decode segment ${i}...`)
+        const meta = metas[i]
+        const buffer = segmentDataRef.current.get(meta.assetId)
+        if (!buffer) continue
+        // 先标记为解码中，防止重复解码
+        decodedSegmentsRef.current.add(i)
         try {
-          await decodeSegmentBatch(i, 60)
-          console.log(`[DIAG_v2] Init decode segment ${i} done`)
+          await decodeSegment(buffer, meta, MAX_INIT_FRAMES)
         } catch (e) {
+          // 解码失败则移除标记，允许后续重试
+          decodedSegmentsRef.current.delete(i)
           console.warn(`[useCanvasPlayer] 初始化解码片段 ${i} 失败:`, e)
         }
-        if (cancelled) break
       }
 
-      console.log(`[useCanvasPlayer] Init decode finished, cancelled:`, cancelled)
-
       if (!cancelled) {
-        console.log("[useCanvasPlayer] Init complete, isReady = true, duration:", totalDuration)
+        console.log("[useCanvasPlayer] Init complete, isReady = true")
         setState((s) => ({ ...s, duration: totalDuration, isReady: true, isBuffering: false }))
-      } else {
-        console.warn("[useCanvasPlayer] Init was cancelled before completion")
       }
     }
 

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

@@ -1,124 +0,0 @@
-/**
- * 草稿自动保存工具 Hook
- *
- * 背景：后端 PUT /templates/{id}/editor 的 config 是「整体替换」语义，
- * 直接发送 { config: { asset_ids } } 会把 title 等其他字段覆盖掉。
- * 本 Hook 统一执行「GET 当前 config → 浅合并新字段 → PUT 回去」，
- * 并用串行队列 + AbortController 保证：
- *   - 同一时刻只有一个保存请求在飞
- *   - 快速连续变化时只提交最后一次
- *   - 组件卸载时取消未完成请求
- *   - 保存失败时保留补丁，自动重试（指数退避，最多 5 次）
- *
- * 保存失败只 console.warn，不弹窗、不阻塞。
- */
-import { useCallback, useEffect, useRef } from "react"
-import { getEditPlan, updateEditPlan } from "@/api/template-editor"
-
-type ConfigPatch = Record<string, unknown>
-
-/** 最大自动重试次数 */
-const MAX_RETRIES = 5
-/** 初始重试延迟（ms），每次翻倍 */
-const BASE_RETRY_DELAY = 1000
-
-export function useDraftAutoSave(templateId?: string) {
-  const timerRef = useRef<ReturnType<typeof setTimeout>>()
-  const abortRef = useRef<AbortController | null>(null)
-  // 待合并的补丁队列（解决「保存进行中又来了新变化」）
-  const pendingPatchRef = useRef<ConfigPatch | null>(null)
-  const savingRef = useRef(false)
-  const templateIdRef = useRef(templateId)
-  templateIdRef.current = templateId
-
-  const flush = useCallback(async (retryCount = 0) => {
-    const tid = templateIdRef.current
-    if (!tid) return
-    // 已有保存在飞：把新补丁暂存，等当前请求结束后再合并一次
-    if (savingRef.current) return
-
-    // 快照当前补丁，但先不清空 —— 成功后才清除，失败时保留以便重试
-    const patchToSave = pendingPatchRef.current
-    if (!patchToSave) {
-      savingRef.current = false
-      return
-    }
-    savingRef.current = true
-
-    const controller = new AbortController()
-    abortRef.current = controller
-    try {
-      // 1. 读当前 config（拿最新，避免覆盖别人/别的步骤写入的字段）
-      const current = await getEditPlan(tid)
-      if (controller.signal.aborted) return
-      const merged = { ...(current.config || {}), ...patchToSave }
-      // 2. 写回完整合并后的 config
-      await updateEditPlan(tid, { config: merged }, controller.signal)
-      // 3. 保存成功才清除已保存的补丁
-      //    （保存期间可能有新补丁进来，只清除我们已经保存的部分）
-      pendingPatchRef.current = null
-    } catch (err) {
-      const name = (err as { name?: string })?.name
-      if (name === "CanceledError" || name === "AbortError") {
-        // 组件卸载或新请求取消，不重试
-        return
-      }
-      console.warn("[useDraftAutoSave] 自动保存草稿失败:", err)
-
-      // 保存失败：把本次尝试保存的补丁合并回 pendingPatchRef
-      // （保存期间可能有新补丁，新补丁优先）
-      pendingPatchRef.current = {
-        ...patchToSave,
-        ...(pendingPatchRef.current || {}),
-      }
-
-      // 指数退避重试
-      if (retryCount < MAX_RETRIES && !controller.signal.aborted) {
-        const delay = BASE_RETRY_DELAY * Math.pow(2, retryCount)
-        timerRef.current = setTimeout(() => {
-          void flush(retryCount + 1)
-        }, delay)
-      }
-      // 超过最大重试次数后，补丁仍保留在 pendingPatchRef 中，
-      // 下次 scheduleSave 触发时会一起带上
-    } finally {
-      savingRef.current = false
-      // 保存期间又积累了新变化（且不是在重试路径中），再触发一次
-      if (pendingPatchRef.current && !controller.signal.aborted && retryCount === 0) {
-        timerRef.current = setTimeout(() => {
-          void flush()
-        }, 50)
-      }
-    }
-  }, [])
-
-  /**
-   * 调度一次自动保存（防抖）
-   * @param patch 要合并进 config 的局部字段
-   * @param delay 防抖毫秒数
-   */
-  const scheduleSave = useCallback(
-    (patch: ConfigPatch, delay = 500) => {
-      const tid = templateIdRef.current
-      if (!tid) return
-      if (timerRef.current) clearTimeout(timerRef.current)
-      // 累计补丁（同一周期内多次变化合并成一次写入）
-      pendingPatchRef.current = { ...(pendingPatchRef.current || {}), ...patch }
-      timerRef.current = setTimeout(() => {
-        void flush()
-      }, delay)
-    },
-    [flush],
-  )
-
-  useEffect(() => {
-    return () => {
-      if (timerRef.current) clearTimeout(timerRef.current)
-      if (abortRef.current) abortRef.current.abort()
-    }
-  }, [])
-
-  return { scheduleSave }
-}
-
-export default useDraftAutoSave

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

@@ -34,6 +34,7 @@ export function useGenerateVideo(props: UseGenerateVideoProps) {
   }, [])
 
   const { startPolling, clearTimer } = useGenerationPolling({
+    templateId: selectedTemplate,
     onProgress: handleProgress,
     onComplete: handleComplete,
     onFailed: handleFailed,
@@ -89,20 +90,16 @@ export function useGenerateVideo(props: UseGenerateVideoProps) {
       const assetIds =
         props.materialMode === "auto" ? props.smartSelectedIds : props.selectedMaterials
 
-      // 封面 URL：优先 AI 生成缩略图，兜底用户上传
-      const coverUrl = props.coverSettings?.thumbnail_url || props.coverSettings?.upload_url || ""
-
       // 直接创建正式生成任务
-      const taskResp = await createGenerationTask({
+      await createGenerationTask({
         template_id: selectedTemplate,
         asset_ids: assetIds,
         output_width: outputWidth,
         output_height: outputHeight,
-        cover_url: coverUrl,
+        cover_url: props.coverSettings?.upload_url || "",
         custom_title: props.titleSettings?.title || "",
         duration: props.duration || undefined,
         video_ratio: props.videoRatio,
-        ...(props.sourceEditPlanId ? { source_edit_plan_id: props.sourceEditPlanId } : {}),
         ...(props.titleSettings?.title
           ? {
               title_config: {
@@ -119,12 +116,7 @@ export function useGenerateVideo(props: UseGenerateVideoProps) {
           : {}),
       })
 
-      // 从创建响应直接拿 task_id，改用新接口轮询
-      const taskId = taskResp.items?.[0]?.id
-      if (!taskId) {
-        throw new Error("创建任务成功但未返回任务 ID，请稍后在任务列表查看")
-      }
-      startPolling(taskId)
+      startPolling()
     } catch (err: unknown) {
       console.error("[handleGenerate] 生成失败:", err)
       setGenerating(false)

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

@@ -1,37 +1,55 @@
 /**
- * 素材片段调度器 Hook（多 video 元素方案 v3）
- *
- * v3 修复：
- * - 所有动态状态存入 ref，tick 为稳定函数，彻底消除 RAF 闭包陷阱
- * - 片段切换时先启动下一个 video 再切可见性，消除冻屏间隔
- * - 进度更新 200ms 节流
+ * 素材片段调度器 Hook（多 video 元素方案 v2）
+ * 每个片段对应一个独立 <video> 元素，全部预加载，通过 display 切换实现无缝播放
+ * 替代单 video + 切 src 方案，消除片段切换延迟
  */
-
 import { useState, useRef, useCallback, useEffect, useMemo } from "react"
 
+/** 单个播放片段 */
 export interface PlaybackSegment {
+  /** 素材 ID */
   assetId: string
+  /** 素材视频 URL */
   videoUrl: string
+  /** 片段在素材中的入点（秒） */
   startTime: number
+  /** 片段在素材中的出点（秒） */
   endTime: number
+  /** 片段在时间线中的顺序 */
   order: number
 }
 
+/** 调度器返回 */
 export interface SegmentSchedulerState {
+  /** 是否正在播放 */
   isPlaying: boolean
+  /** 当前播放的全局时间（秒） */
   currentTime: number
+  /** 总时长（秒） */
   totalDuration: number
+  /** 当前片段索引 */
   currentSegmentIndex: number
+  /** 当前片段的本地播放时间 */
   segmentLocalTime: number
+  /** 是否已播完 */
   isEnded: boolean
+  /** 是否可以播放（至少有 1 个片段） */
   canPlay: boolean
+  /** 播放 */
   play: () => void
+  /** 暂停 */
   pause: () => void
+  /** 切换播放/暂停 */
   togglePlayPause: () => void
+  /** 跳转到全局时间 */
   seekTo: (time: number) => void
+  /** 每个片段对应的 video 元素 ref 数组 */
   videoRefs: React.MutableRefObject<(HTMLVideoElement | null)[]>
 }
 
+/**
+ * 根据全局时间定位对应的片段和本地时间
+ */
 function findSegmentAtTime(
   segments: PlaybackSegment[],
   globalTime: number,
@@ -48,6 +66,9 @@ function findSegmentAtTime(
   return { index: segments.length - 1, localTime: segments[segments.length - 1].endTime }
 }
 
+/**
+ * 计算每个片段的全局起始时间
+ */
 function buildTimeline(segments: PlaybackSegment[]): number[] {
   const starts: number[] = []
   let acc = 0
@@ -58,242 +79,224 @@ function buildTimeline(segments: PlaybackSegment[]): number[] {
   return starts
 }
 
+/**
+ * useSegmentScheduler — 多 video 元素版素材片段调度器
+ *
+ * 核心改变：
+ * - 每个片段对应一个独立 <video> 元素（由组件渲染，ref 传入）
+ * - 所有 video 在挂载时即设置 src + preload="auto"，浏览器自动预加载
+ * - 切换片段仅改 currentSegmentIndex + display，无需重新 load
+ * - 实现无缝切换，无加载延迟
+ */
 export function useSegmentScheduler(segments: PlaybackSegment[]): SegmentSchedulerState {
+  /** 每个片段对应的 video 元素 ref（由组件 JSX 渲染并绑定） */
   const videoRefs = useRef<(HTMLVideoElement | null)[]>([])
   const [isPlaying, setIsPlaying] = useState(false)
   const [currentTime, setCurrentTime] = useState(0)
   const [currentSegmentIndex, setCurrentSegmentIndex] = useState(0)
   const [isEnded, setIsEnded] = useState(false)
-  const rafRef = useRef(0)
+  const rafRef = useRef<number>(0)
   const isSeekingRef = useRef(false)
-  const lastTimeUpdateRef = useRef(0)
 
-  // 所有动态值存入 ref，tick 始终读取最新值，不依赖闭包
-  const segIdxRef = useRef(0)
-  const segmentsRef = useRef(segments)
-  const timelineStartsData = useMemo(() => buildTimeline(segments), [segments])
-  const totalDurationData = useMemo(
+  // 计算时间线
+  const timelineStarts = useMemo(() => buildTimeline(segments), [segments])
+  const totalDuration = useMemo(
     () => segments.reduce((sum, seg) => sum + (seg.endTime - seg.startTime), 0),
     [segments],
   )
-  const timelineStartsRef = useRef(timelineStartsData)
-  const totalDurationRef = useRef(totalDurationData)
-  const isPlayingRef = useRef(false)
-
-  segmentsRef.current = segments
-  timelineStartsRef.current = timelineStartsData
-  totalDurationRef.current = totalDurationData
 
   const canPlay = segments.length > 0
 
-  useEffect(() => {
-    segIdxRef.current = currentSegmentIndex
-  }, [currentSegmentIndex])
-
-  useEffect(() => {
-    isPlayingRef.current = isPlaying
-  }, [isPlaying])
-
-  const waitForReady = useCallback((video: HTMLVideoElement, timeout = 3000): Promise<void> => {
-    if (video.readyState >= 3) return Promise.resolve()
-    return new Promise((resolve) => {
-      const onCanPlay = () => {
-        video.removeEventListener("canplay", onCanPlay)
-        clearTimeout(timer)
-        resolve()
-      }
-      const timer = setTimeout(() => {
-        video.removeEventListener("canplay", onCanPlay)
-        resolve()
-      }, timeout)
-      video.addEventListener("canplay", onCanPlay)
-    })
-  }, [])
+  // 当前片段信息
+  const currentSegment = segments[currentSegmentIndex] || null
+  const segmentLocalTime = currentSegment
+    ? currentTime - (timelineStarts[currentSegmentIndex] || 0) + currentSegment.startTime
+    : 0
 
+  /**
+   * 切换到指定片段
+   * 不改变 src（video 已在 JSX 中设置），仅 seek + 等待可播
+   */
   const switchToSegment = useCallback(
-    async (index: number, seekToLocalTime?: number) => {
-      const segs = segmentsRef.current
-      const video = videoRefs.current[index]
-      if (!video || index >= segs.length) return
+    (index: number, seekToLocalTime?: number): Promise<void> => {
+      return new Promise((resolve) => {
+        // 暂停当前视频
+        const prevVideo = videoRefs.current[currentSegmentIndex]
+        if (prevVideo) prevVideo.pause()
 
-      const seg = segs[index]
-      const localTime = seekToLocalTime ?? seg.startTime
-      const oldIdx = segIdxRef.current
-      const oldVideo = videoRefs.current[oldIdx]
+        const video = videoRefs.current[index]
+        if (!video || index >= segments.length) {
+          resolve()
+          return
+        }
 
-      if (oldVideo && oldVideo !== video) oldVideo.pause()
+        const seg = segments[index]
+        const localTime = seekToLocalTime ?? seg.startTime
 
-      if (!video.src && seg.videoUrl) {
-        video.src = seg.videoUrl
-        video.load()
-      }
-
-      if (Math.abs(video.currentTime - localTime) > 0.05) {
+        // 设置播放位置
         video.currentTime = localTime
-      }
 
-      segIdxRef.current = index
-      setCurrentSegmentIndex(index)
+        // 如果已有足够帧数据，直接 resolve
+        if (video.readyState >= 2) {
+          setCurrentSegmentIndex(index)
+          resolve()
+          return
+        }
 
-      await waitForReady(video)
+        // 等待 canplay 事件
+        const onCanPlay = () => {
+          video.removeEventListener("canplay", onCanPlay)
+          clearTimeout(timeoutId)
+          setCurrentSegmentIndex(index)
+          resolve()
+        }
+
+        // 10 秒超时保护
+        const timeoutId = setTimeout(() => {
+          video.removeEventListener("canplay", onCanPlay)
+          console.warn(
+            `[useSegmentScheduler] 片段 ${index} 预加载超时 (10s), readyState=${video.readyState}`,
+          )
+          setCurrentSegmentIndex(index)
+          resolve()
+        }, 10000)
+
+        video.addEventListener("canplay", onCanPlay)
+      })
     },
-    [waitForReady],
+    [segments, currentSegmentIndex],
   )
 
-  // 稳定的 tick 函数，空依赖，所有值从 ref 读取
+  /** 播放循环 — 检测片段边界并切换 */
   const tick = useCallback(() => {
-    const segs = segmentsRef.current
-    const idx = segIdxRef.current
-    const video = videoRefs.current[idx]
-
+    const video = videoRefs.current[currentSegmentIndex]
     if (!video || isSeekingRef.current) {
       rafRef.current = requestAnimationFrame(tick)
       return
     }
 
-    const seg = segs[idx]
+    const seg = segments[currentSegmentIndex]
     if (!seg) return
 
-    // 预加载下一个片段
-    const nextIndex = idx + 1
-    if (nextIndex < segs.length) {
-      const nextVideo = videoRefs.current[nextIndex]
-      if (nextVideo) {
-        const timeToEnd = seg.endTime - video.currentTime
-        if (timeToEnd <= 2 && nextVideo.readyState < 3) {
-          const nextSeg = segs[nextIndex]
-          if (Math.abs(nextVideo.currentTime - nextSeg.startTime) > 0.5) {
-            nextVideo.currentTime = nextSeg.startTime
+    // 检查是否到达出点（容差 0.15s）
+    if (video.currentTime >= seg.endTime - 0.15) {
+      video.pause()
+      const nextIndex = currentSegmentIndex + 1
+      if (nextIndex < segments.length) {
+        switchToSegment(nextIndex).then(() => {
+          setIsPlaying(true)
+          rafRef.current = requestAnimationFrame(tick)
+          const nextVideo = videoRefs.current[nextIndex]
+          if (nextVideo) {
+            const canPlay = () => {
+              nextVideo
+                .play()
+                .catch((e) =>
+                  console.warn("[useSegmentScheduler] auto-play next segment failed:", e),
+                )
+            }
+            if (nextVideo.readyState >= 3) {
+              canPlay()
+            } else {
+              const timeout = setTimeout(canPlay, 300)
+              nextVideo.addEventListener(
+                "canplay",
+                () => {
+                  clearTimeout(timeout)
+                  canPlay()
+                },
+                { once: true },
+              )
+            }
           }
-        }
-      }
-    }
-
-    // 检测片段边界
-    if (video.currentTime >= seg.endTime - 0.1) {
-      if (nextIndex < segs.length) {
-        const nextVideo = videoRefs.current[nextIndex]
-        const nextSeg = segs[nextIndex]
-        const accumulatedTime =
-          (timelineStartsRef.current[idx] || 0) + (seg.endTime - seg.startTime)
-
-        if (nextVideo) {
-          if (Math.abs(nextVideo.currentTime - nextSeg.startTime) > 0.1) {
-            nextVideo.currentTime = nextSeg.startTime
-          }
-          // 先启动下一个视频（muted，可安全同时播放）
-          nextVideo
-            .play()
-            .catch((e) => console.warn("[useSegmentScheduler] next segment play failed:", e))
-        }
-
-        // 立即切换可见性
-        segIdxRef.current = nextIndex
-        setCurrentSegmentIndex(nextIndex)
-        setCurrentTime(accumulatedTime)
-        lastTimeUpdateRef.current = 0
-        setIsPlaying(true)
-
-        // 下一帧暂停旧视频（让新视频先渲染，避免冻屏）
-        const oldVideo = video
-        requestAnimationFrame(() => {
-          oldVideo.pause()
         })
-
-        rafRef.current = requestAnimationFrame(tick)
-        return
+        const accumulatedTime =
+          (timelineStarts[currentSegmentIndex] || 0) + (seg.endTime - seg.startTime)
+        setCurrentTime(accumulatedTime)
       } else {
-        video.pause()
         setIsPlaying(false)
         setIsEnded(true)
-        setCurrentTime(totalDurationRef.current)
+        setCurrentTime(totalDuration)
         return
       }
-    }
-
-    const globalTime = (timelineStartsRef.current[idx] || 0) + (video.currentTime - seg.startTime)
-    const now = performance.now()
-    if (now - lastTimeUpdateRef.current >= 200) {
-      lastTimeUpdateRef.current = now
-      setCurrentTime(Math.max(0, Math.min(globalTime, totalDurationRef.current)))
+    } else {
+      const globalTime =
+        (timelineStarts[currentSegmentIndex] || 0) + (video.currentTime - seg.startTime)
+      setCurrentTime(Math.max(0, Math.min(globalTime, totalDuration)))
     }
 
     rafRef.current = requestAnimationFrame(tick)
-  }, [])
+  }, [segments, currentSegmentIndex, timelineStarts, totalDuration, switchToSegment])
 
+  /** 播放 */
   const play = useCallback(async () => {
     if (!canPlay) return
-    setIsEnded(false)
-    const idx = segIdxRef.current
-    const video = videoRefs.current[idx]
-    if (!video) return
 
-    if (idx === 0 && video.readyState < 2) {
-      if (!video.src && segmentsRef.current[0]?.videoUrl) {
-        video.src = segmentsRef.current[0].videoUrl
-        video.load()
-      }
-      await waitForReady(video)
+    setIsEnded(false)
+
+    // 确保第一段可播放
+    const firstVideo = videoRefs.current[0]
+    if (firstVideo && currentSegmentIndex === 0 && firstVideo.readyState < 2) {
+      await switchToSegment(0)
     }
 
+    const video = videoRefs.current[currentSegmentIndex]
+    if (!video) return
+
     try {
-      await video.play()
+      const playPromise = video.play()
+      if (playPromise !== undefined) {
+        await playPromise
+      }
       setIsPlaying(true)
-      cancelAnimationFrame(rafRef.current)
       rafRef.current = requestAnimationFrame(tick)
     } catch (err) {
       console.warn("[useSegmentScheduler] 播放失败:", err)
     }
-  }, [canPlay, waitForReady, tick])
+  }, [canPlay, switchToSegment, tick, currentSegmentIndex])
 
+  /** 暂停 */
   const pause = useCallback(() => {
-    const video = videoRefs.current[segIdxRef.current]
+    const video = videoRefs.current[currentSegmentIndex]
     if (video) video.pause()
     setIsPlaying(false)
     cancelAnimationFrame(rafRef.current)
-  }, [])
+  }, [currentSegmentIndex])
 
+  /** 切换播放/暂停 */
   const togglePlayPause = useCallback(() => {
-    if (isPlayingRef.current) {
+    if (isPlaying) {
       pause()
     } else {
       if (isEnded) {
+        // 播放结束后再次播放，从头开始
         setIsEnded(false)
-        lastTimeUpdateRef.current = 0
-        const firstVideo = videoRefs.current[0]
-        if (firstVideo) {
-          videoRefs.current.forEach((v, i) => {
-            if (v && i !== 0) v.pause()
-          })
-          firstVideo.currentTime = segmentsRef.current[0]?.startTime || 0
-          segIdxRef.current = 0
-          setCurrentSegmentIndex(0)
-          setCurrentTime(0)
-          firstVideo
-            .play()
-            .then(() => {
-              setIsPlaying(true)
-              cancelAnimationFrame(rafRef.current)
-              rafRef.current = requestAnimationFrame(tick)
-            })
-            .catch((e) => console.warn("[useSegmentScheduler] restart failed:", e))
-        }
+        switchToSegment(0, segments[0]?.startTime).then(() => {
+          const video = videoRefs.current[0]
+          if (video) {
+            video.play().catch((e) => console.warn("[useSegmentScheduler] restart play failed:", e))
+            setIsPlaying(true)
+            setCurrentTime(0)
+            rafRef.current = requestAnimationFrame(tick)
+          }
+        })
       } else {
         play()
       }
     }
-  }, [isEnded, pause, play, tick])
+  }, [isPlaying, isEnded, pause, play, switchToSegment, segments, tick])
 
+  /** 跳转到指定全局时间 */
   const seekTo = useCallback(
     async (time: number) => {
       if (!canPlay) return
-      const clampedTime = Math.max(0, Math.min(time, totalDurationRef.current))
-      const { index, localTime } = findSegmentAtTime(segmentsRef.current, clampedTime)
+
+      const clampedTime = Math.max(0, Math.min(time, totalDuration))
+      const { index, localTime } = findSegmentAtTime(segments, clampedTime)
 
       isSeekingRef.current = true
-      cancelAnimationFrame(rafRef.current)
 
-      if (index !== segIdxRef.current) {
+      if (index !== currentSegmentIndex) {
         await switchToSegment(index, localTime)
       } else {
         const video = videoRefs.current[index]
@@ -302,54 +305,48 @@ export function useSegmentScheduler(segments: PlaybackSegment[]): SegmentSchedul
 
       setCurrentTime(clampedTime)
       setIsEnded(false)
-      lastTimeUpdateRef.current = 0
-
-      if (isPlayingRef.current) {
-        const video = videoRefs.current[index]
-        if (video) {
-          video.play().catch(() => {})
-        }
-        rafRef.current = requestAnimationFrame(tick)
-      }
 
       setTimeout(() => {
         isSeekingRef.current = false
       }, 200)
     },
-    [canPlay, switchToSegment, tick],
+    [canPlay, totalDuration, segments, currentSegmentIndex, switchToSegment],
   )
 
+  // 确保 videoRefs 数组长度与 segments 一致 + 强制预加载
   useEffect(() => {
     videoRefs.current = videoRefs.current.slice(0, segments.length)
     while (videoRefs.current.length < segments.length) {
       videoRefs.current.push(null)
     }
+    // 强制预加载：所有 video 元素挂载后，调用 load() 确保浏览器真正开始加载数据
+    videoRefs.current.forEach((video) => {
+      if (video) {
+        video.load()
+      }
+    })
   }, [segments])
 
+  // 组件卸载时清理
   useEffect(() => {
     return () => {
       cancelAnimationFrame(rafRef.current)
     }
   }, [])
 
+  // 片段列表变化时重置
   useEffect(() => {
     cancelAnimationFrame(rafRef.current)
-    segIdxRef.current = 0
     setIsPlaying(false)
     setCurrentTime(0)
     setCurrentSegmentIndex(0)
     setIsEnded(false)
   }, [segments])
 
-  const currentSegment = segments[currentSegmentIndex] || null
-  const segmentLocalTime = currentSegment
-    ? currentTime - (timelineStartsRef.current[currentSegmentIndex] || 0) + currentSegment.startTime
-    : 0
-
   return {
     isPlaying,
     currentTime,
-    totalDuration: totalDurationData,
+    totalDuration,
     currentSegmentIndex,
     segmentLocalTime,
     isEnded,

apps/web/src/pages/generate/hooks/useStep2Materials.ts

@@ -3,14 +3,9 @@
  * 组合素材库加载 + 智能匹配两个子 Hook
  */
 import { useCallback, useEffect, useRef } from "react"
-import type { AssetItem } from "@/api/assets"
-import type { TemplateSegment } from "@/api/templates/types"
-import { updateEditPlanClips } from "@/api/template-editor"
 import { formatDuration } from "../utils/formatDuration"
-import { buildClipsFromAssets } from "../utils/buildClipsFromAssets"
 import { useMaterialLibrary } from "./step2-materials/useMaterialLibrary"
 import { useSmartMatch } from "./step2-materials/useSmartMatch"
-import { useDraftAutoSave } from "./useDraftAutoSave"
 
 interface UseStep2MaterialsProps {
   materialMode: "manual" | "auto"
@@ -19,10 +14,6 @@ interface UseStep2MaterialsProps {
   onSelectedMaterialsChange: (ids: string[]) => void
   smartSelectedIds: string[]
   onSmartSelectedIdsChange: (ids: string[]) => void
-  /** 当前选中的模板/草稿 ID，用于自动保存 */
-  selectedTemplate?: string
-  /** 当前模板的 segments（用于构建 clips duration） */
-  templateSegments?: TemplateSegment[]
 }
 
 export function useStep2Materials({
@@ -32,8 +23,6 @@ export function useStep2Materials({
   onSelectedMaterialsChange,
   smartSelectedIds,
   onSmartSelectedIdsChange,
-  selectedTemplate,
-  templateSegments,
 }: UseStep2MaterialsProps) {
   const { libraries, selectedLibraryId, setSelectedLibraryId, materials, materialsLoading } =
     useMaterialLibrary()
@@ -64,69 +53,6 @@ export function useStep2Materials({
     handleSmartMatch()
   }, [selectedLibraryId, materialMode, materialsLoading, materials.items, handleSmartMatch])
 
-  /* ── Step2 选择素材后自动保存草稿 asset_ids（防抖 500ms，失败静默） ── */
-  const { scheduleSave } = useDraftAutoSave(selectedTemplate)
-  useEffect(() => {
-    if (!selectedTemplate) return
-    const ids = materialMode === "auto" ? smartSelectedIds : selectedMaterials
-    scheduleSave({ asset_ids: ids }, 500)
-  }, [selectedTemplate, materialMode, selectedMaterials, smartSelectedIds, scheduleSave])
-
-  /* ── Step2 选择素材后同步写入 edit_plan_clips（防抖 800ms，失败静默） ── */
-  const clipsTimerRef = useRef<ReturnType<typeof setTimeout>>()
-  const clipsAbortRef = useRef<AbortController | null>(null)
-  const templateSegmentsRef = useRef(templateSegments)
-  templateSegmentsRef.current = templateSegments
-  const selectedTemplateRef = useRef(selectedTemplate)
-  selectedTemplateRef.current = selectedTemplate
-  const materialsRef = useRef(materials)
-  materialsRef.current = materials
-  const smartMatchedRef = useRef<AssetItem[]>(smartMatch.smartMatchedResults)
-  smartMatchedRef.current = smartMatch.smartMatchedResults
-
-  useEffect(() => {
-    const tid = selectedTemplateRef.current
-    if (!tid) return
-    const ids = materialMode === "auto" ? smartSelectedIds : selectedMaterials
-    if (!ids.length) return
-
-    if (clipsTimerRef.current) clearTimeout(clipsTimerRef.current)
-    clipsTimerRef.current = setTimeout(async () => {
-      // 取消上一次未完成的请求
-      if (clipsAbortRef.current) clipsAbortRef.current.abort()
-      const controller = new AbortController()
-      clipsAbortRef.current = controller
-
-      const clips = buildClipsFromAssets({
-        selectedIds: ids,
-        materials: materialsRef.current.items,
-        smartMatchedAssets: smartMatchedRef.current,
-        templateSegments: templateSegmentsRef.current || [],
-      })
-
-      try {
-        await updateEditPlanClips(tid, clips, controller.signal)
-      } catch (err) {
-        const name = (err as { name?: string })?.name
-        if (name !== "CanceledError" && name !== "AbortError") {
-          console.warn("[useStep2Materials] 写入 clips 失败:", err)
-        }
-      }
-    }, 800)
-
-    return () => {
-      if (clipsTimerRef.current) clearTimeout(clipsTimerRef.current)
-    }
-  }, [selectedTemplate, materialMode, selectedMaterials, smartSelectedIds, templateSegments])
-
-  // 组件卸载时取消未完成请求
-  useEffect(() => {
-    return () => {
-      if (clipsTimerRef.current) clearTimeout(clipsTimerRef.current)
-      if (clipsAbortRef.current) clipsAbortRef.current.abort()
-    }
-  }, [])
-
   /* ── 手动选择素材 ── */
   const handleToggleMaterial = useCallback(
     (materialId: string) => {

apps/web/src/pages/generate/hooks/useStep4Title/index.ts

@@ -4,24 +4,17 @@ import { getTitles } from "@/api/titles"
 import type { TitleSettings } from "../../types"
 import { useAiTitleGenerator } from "./useAiTitleGenerator"
 import { useTitleStyleUpdaters } from "./useTitleStyleUpdaters"
-import { useDraftAutoSave } from "../useDraftAutoSave"
 
 interface UseStep4TitleProps {
   titleSettings: TitleSettings
   onTitleSettingsChange: (settings: TitleSettings) => void
-  /** 当前选中的模板/草稿 ID，用于自动保存 */
-  selectedTemplate?: string
 }
 
 /**
  * Step 4 标题设置 Hook
  * 封装 AI 标题生成、标题样式设置等逻辑
  */
-export function useStep4Title({
-  titleSettings,
-  onTitleSettingsChange,
-  selectedTemplate,
-}: UseStep4TitleProps) {
+export function useStep4Title({ titleSettings, onTitleSettingsChange }: UseStep4TitleProps) {
   // 标题库数据
   const { data: userTitles = [] } = useQuery({
     queryKey: ["titles"],
@@ -49,38 +42,6 @@ export function useStep4Title({
   const prevAiAutoSelect = useRef(titleSettings.aiAutoSelect)
   const isFirstMount = useRef(true)
 
-  /* ── Step4 标题内容/样式变化后自动保存草稿（防抖 800ms，失败静默） ── */
-  const { scheduleSave: scheduleTitleSave } = useDraftAutoSave(selectedTemplate)
-  useEffect(() => {
-    if (!selectedTemplate) return
-    scheduleTitleSave(
-      {
-        title: {
-          text: titleSettings.title,
-          font: titleSettings.font,
-          font_size: titleSettings.size,
-          color: titleSettings.color,
-          position: titleSettings.position,
-          bold: titleSettings.bold,
-          stroke: titleSettings.stroke,
-          shadow: titleSettings.shadow,
-        },
-      },
-      800,
-    )
-  }, [
-    selectedTemplate,
-    titleSettings.title,
-    titleSettings.font,
-    titleSettings.size,
-    titleSettings.color,
-    titleSettings.position,
-    titleSettings.bold,
-    titleSettings.stroke,
-    titleSettings.shadow,
-    scheduleTitleSave,
-  ])
-
   // 当 AI 自动选择开关打开时，自动生成/选择一个标题填入
   // 首次挂载时如果开关已经是 true 且无标题，也需要触发
   useEffect(() => {

apps/web/src/pages/generate/hooks/useStep6Cover.ts

@@ -7,8 +7,6 @@ import { message } from "antd"
 import type { CoverConfig, CoverTemplate } from "../types/cover"
 import { generateCover } from "@/api/generation"
 import { createPreview, getPreviewStatus } from "@/api/generation/preview"
-import { updateEditPlan } from "@/api/template-editor"
-import type { TitleSettings } from "../types"
 import {
   fetchCoverTemplates,
   createCoverTemplate,
@@ -24,8 +22,6 @@ interface UseStep6CoverProps {
   assetIds?: string[]
   /** 当前选中的模板 ID */
   selectedTemplate?: string
-  /** Step4 标题设置，用于预览视频烧录标题 & 封面叠加标题 */
-  titleSettings?: TitleSettings
 }
 
 export function useStep6Cover({
@@ -34,7 +30,6 @@ export function useStep6Cover({
   duration,
   assetIds = [],
   selectedTemplate = "",
-  titleSettings,
 }: UseStep6CoverProps) {
   const [generating, setGenerating] = useState(false)
 
@@ -97,20 +92,6 @@ export function useStep6Cover({
       const response = await generateCover(selectedTemplate, {
         asset_ids: assetIds,
         cover_type: "ai_frame",
-        ...(titleSettings?.title
-          ? {
-              title_config: {
-                text: titleSettings.title,
-                font: titleSettings.font,
-                font_size: titleSettings.size,
-                font_color: titleSettings.color,
-                position: titleSettings.position,
-                bold: titleSettings.bold,
-                stroke: titleSettings.stroke,
-                shadow: titleSettings.shadow,
-              },
-            }
-          : {}),
       })
       clearTimeout(timeoutId)
       const thumbnailUrl = response.cover?.image_url || ""
@@ -155,20 +136,6 @@ export function useStep6Cover({
             template_id: selectedTemplate,
             asset_ids: assetIds,
             duration: duration || 30,
-            ...(titleSettings?.title
-              ? {
-                  title_config: {
-                    text: titleSettings.title,
-                    font: titleSettings.font,
-                    font_size: titleSettings.size,
-                    font_color: titleSettings.color,
-                    position: titleSettings.position,
-                    bold: titleSettings.bold,
-                    stroke: titleSettings.stroke,
-                    shadow: titleSettings.shadow,
-                  },
-                }
-              : {}),
           })
           // 轮询等待预览渲染完成：递归 setTimeout 避免请求重叠 + 120s 超时兜底
           await new Promise<void>((resolve, reject) => {
@@ -187,21 +154,6 @@ export function useStep6Cover({
               try {
                 const status = await getPreviewStatus(previewResp.task_id)
                 if (status.status === "completed") {
-                  // 保存预览视频地址到 plan.config.rendered_storage_key，
-                  // 供封面 API 的 E1 兜底路径定位渲染后的视频（含标题烧录）。
-                  // video_url 可能是完整 http(s) URL 或 OSS storage_key，两种格式后端都能处理。
-                  if (status.video_url) {
-                    try {
-                      await updateEditPlan(selectedTemplate, {
-                        config: { rendered_storage_key: status.video_url },
-                      })
-                    } catch (saveErr) {
-                      console.warn(
-                        "[Step6] 保存 rendered_storage_key 失败（不阻塞封面重试）:",
-                        saveErr,
-                      )
-                    }
-                  }
                   done(() => resolve())
                 } else if (status.status === "failed") {
                   done(() => reject(new Error(status.error_message || "预览渲染失败")))
@@ -219,20 +171,6 @@ export function useStep6Cover({
           const retryResp = await generateCover(selectedTemplate, {
             asset_ids: assetIds,
             cover_type: "ai_frame",
-            ...(titleSettings?.title
-              ? {
-                  title_config: {
-                    text: titleSettings.title,
-                    font: titleSettings.font,
-                    font_size: titleSettings.size,
-                    font_color: titleSettings.color,
-                    position: titleSettings.position,
-                    bold: titleSettings.bold,
-                    stroke: titleSettings.stroke,
-                    shadow: titleSettings.shadow,
-                  },
-                }
-              : {}),
           })
           const retryUrl = retryResp.cover?.image_url || ""
           if (retryUrl) {
@@ -274,15 +212,7 @@ export function useStep6Cover({
       clearTimeout(timeoutId)
       setGenerating(false)
     }
-  }, [
-    selectedTemplate,
-    assetIds,
-    coverSettings,
-    onCoverSettingsChange,
-    generating,
-    duration,
-    titleSettings,
-  ])
+  }, [selectedTemplate, assetIds, coverSettings, onCoverSettingsChange, generating, duration])
 
   // ── 模板操作方法 ──
   const handleSelectTemplate = useCallback((id: string) => {

apps/web/src/pages/generate/utils/buildClipsFromAssets.ts

@@ -1,57 +0,0 @@
-/**
- * 将选中素材 + 模板 segments 构建为 edit_plan_clips 写入数据。
- *
- * 逻辑必须与 FrontendPreviewPlayer.tsx 中 buildPlaybackSegments 完全一致：
- *   assetDuration = asset.duration || asset.metadata?.duration || 30
- *   tplSeg = templateSegments[i] || lastSegment
- *   segDuration = clamp(assetDuration, tplSeg.duration_min, tplSeg.duration_max)
- *   start_time = 0
- *   duration = segDuration
- */
-import type { AssetItem } from "@/api/assets"
-import type { TemplateSegment } from "@/api/templates/types"
-import type { EditPlanClipInput } from "@/api/template-editor"
-
-interface BuildClipsOptions {
-  /** 选中的素材 ID 列表（按选择顺序） */
-  selectedIds: string[]
-  /** 已加载的素材列表（用于查 duration） */
-  materials: AssetItem[]
-  /** 智能匹配返回的素材（auto 模式下可能不在 materials 列表中） */
-  smartMatchedAssets?: AssetItem[]
-  /** 模板 segments */
-  templateSegments?: TemplateSegment[]
-}
-
-export function buildClipsFromAssets({
-  selectedIds,
-  materials,
-  smartMatchedAssets = [],
-  templateSegments = [],
-}: BuildClipsOptions): EditPlanClipInput[] {
-  if (!selectedIds.length) return []
-
-  // 合并两个素材来源，建立 id → asset 索引
-  const assetMap = new Map<string, AssetItem>()
-  for (const a of materials) assetMap.set(a.id, a)
-  for (const a of smartMatchedAssets) assetMap.set(a.id, a)
-
-  const lastSeg = templateSegments[templateSegments.length - 1]
-
-  return selectedIds.map((assetId, i) => {
-    const asset = assetMap.get(assetId)
-    const assetDuration = asset?.duration || asset?.metadata?.duration || 30
-
-    const tplSeg = templateSegments[i] || lastSeg
-    const segDuration = tplSeg
-      ? Math.min(tplSeg.duration_max, Math.max(tplSeg.duration_min, assetDuration))
-      : Math.min(assetDuration, 10)
-
-    return {
-      asset_id: assetId,
-      start_time: 0,
-      duration: segDuration,
-      order: i,
-    }
-  })
-}

apps/web/src/test/api/bgm.test.ts

@@ -32,7 +32,7 @@ describe("bgm API", () => {
 
   describe("getBgmPresets", () => {
     it("should resolve successfully", async () => {
-      await expect(getBgmPresets("test-template", { category: "test" })).resolves.not.toThrow()
+      await expect(getBgmPresets("test-params?")).resolves.not.toThrow()
     })
 
     it("should reject on API error", async () => {
@@ -42,7 +42,7 @@ describe("bgm API", () => {
       mockDelete.mockRejectedValue(new Error("Network error"))
       mockPatch.mockRejectedValue(new Error("Network error"))
 
-      await expect(getBgmPresets("test-template", { category: "test" })).rejects.toThrow()
+      await expect(getBgmPresets("test-params?")).rejects.toThrow()
     })
   })
 })

apps/web/src/test/api/edit-plans.test.ts

@@ -1,12 +1,16 @@
 import { describe, expect, it, vi, beforeEach } from "vitest"
 import {
+  getEditPlans,
   getEditPlan,
+  createEditPlan,
   updateEditPlan,
+  deleteEditPlan,
   generateEditPlan,
   getGenerationStatus,
   aiRecommendClips,
   getEditPlanGenerations,
   getGenerationTaskResults,
+  cancelGeneration,
   getEditPlanClips,
   getEditPlanClip,
   createEditPlanClip,
@@ -15,6 +19,7 @@ import {
   reorderEditPlanClips,
   batchDeleteEditPlanClips,
   createClipsFromAssets,
+  copyEditPlan,
   getMediaAssets,
   getMediaAsset,
 } from "@/api/template-editor"
@@ -48,6 +53,22 @@ describe("editPlans API", () => {
     mockPatch.mockResolvedValue({ data: { success: true, items: [] } })
   })
 
+  describe("getEditPlans", () => {
+    it("should resolve successfully", async () => {
+      await expect(getEditPlans("test-params?")).resolves.not.toThrow()
+    })
+
+    it("should reject on API error", async () => {
+      mockGet.mockRejectedValue(new Error("Network error"))
+      mockPost.mockRejectedValue(new Error("Network error"))
+      mockPut.mockRejectedValue(new Error("Network error"))
+      mockDelete.mockRejectedValue(new Error("Network error"))
+      mockPatch.mockRejectedValue(new Error("Network error"))
+
+      await expect(getEditPlans("test-params?")).rejects.toThrow()
+    })
+  })
+
   describe("getEditPlan", () => {
     it("should resolve successfully", async () => {
       await expect(getEditPlan("test-planId")).resolves.not.toThrow()
@@ -64,6 +85,22 @@ describe("editPlans API", () => {
     })
   })
 
+  describe("createEditPlan", () => {
+    it("should resolve successfully", async () => {
+      await expect(createEditPlan({ name: "test-item" })).resolves.not.toThrow()
+    })
+
+    it("should reject on API error", async () => {
+      mockGet.mockRejectedValue(new Error("Network error"))
+      mockPost.mockRejectedValue(new Error("Network error"))
+      mockPut.mockRejectedValue(new Error("Network error"))
+      mockDelete.mockRejectedValue(new Error("Network error"))
+      mockPatch.mockRejectedValue(new Error("Network error"))
+
+      await expect(createEditPlan({ name: "test-item" })).rejects.toThrow()
+    })
+  })
+
   describe("updateEditPlan", () => {
     it("should resolve successfully", async () => {
       await expect(updateEditPlan("test-planId")).resolves.not.toThrow()
@@ -80,6 +117,22 @@ describe("editPlans API", () => {
     })
   })
 
+  describe("deleteEditPlan", () => {
+    it("should resolve successfully", async () => {
+      await expect(deleteEditPlan("test-planId")).resolves.not.toThrow()
+    })
+
+    it("should reject on API error", async () => {
+      mockGet.mockRejectedValue(new Error("Network error"))
+      mockPost.mockRejectedValue(new Error("Network error"))
+      mockPut.mockRejectedValue(new Error("Network error"))
+      mockDelete.mockRejectedValue(new Error("Network error"))
+      mockPatch.mockRejectedValue(new Error("Network error"))
+
+      await expect(deleteEditPlan("test-planId")).rejects.toThrow()
+    })
+  })
+
   describe("generateEditPlan", () => {
     it("should resolve successfully", async () => {
       await expect(generateEditPlan("test-planId")).resolves.not.toThrow()
@@ -160,6 +213,22 @@ describe("editPlans API", () => {
     })
   })
 
+  describe("cancelGeneration", () => {
+    it("should resolve successfully", async () => {
+      await expect(cancelGeneration("test-planId")).resolves.not.toThrow()
+    })
+
+    it("should reject on API error", async () => {
+      mockGet.mockRejectedValue(new Error("Network error"))
+      mockPost.mockRejectedValue(new Error("Network error"))
+      mockPut.mockRejectedValue(new Error("Network error"))
+      mockDelete.mockRejectedValue(new Error("Network error"))
+      mockPatch.mockRejectedValue(new Error("Network error"))
+
+      await expect(cancelGeneration("test-planId")).rejects.toThrow()
+    })
+  })
+
   describe("getEditPlanClips", () => {
     it("should resolve successfully", async () => {
       await expect(getEditPlanClips("test-planId")).resolves.not.toThrow()
@@ -288,6 +357,22 @@ describe("editPlans API", () => {
     })
   })
 
+  describe("copyEditPlan", () => {
+    it("should resolve successfully", async () => {
+      await expect(copyEditPlan("test-planId")).resolves.not.toThrow()
+    })
+
+    it("should reject on API error", async () => {
+      mockGet.mockRejectedValue(new Error("Network error"))
+      mockPost.mockRejectedValue(new Error("Network error"))
+      mockPut.mockRejectedValue(new Error("Network error"))
+      mockDelete.mockRejectedValue(new Error("Network error"))
+      mockPatch.mockRejectedValue(new Error("Network error"))
+
+      await expect(copyEditPlan("test-planId")).rejects.toThrow()
+    })
+  })
+
   describe("getMediaAssets", () => {
     it("should resolve successfully", async () => {
       await expect(getMediaAssets("test-libraryId?")).resolves.not.toThrow()

apps/web/src/test/api/templates.test.ts

@@ -5,6 +5,7 @@ import {
   getTemplate,
   toggleFavoriteTemplate,
   copyTemplate,
+  generateFromTemplate,
 } from "@/api/templates"
 
 const mockGet = vi.fn()
@@ -115,4 +116,20 @@ describe("templates API", () => {
       await expect(copyTemplate("test-templateId")).rejects.toThrow()
     })
   })
+
+  describe("generateFromTemplate", () => {
+    it("should resolve successfully", async () => {
+      await expect(generateFromTemplate("test-templateId")).resolves.not.toThrow()
+    })
+
+    it("should reject on API error", async () => {
+      mockGet.mockRejectedValue(new Error("Network error"))
+      mockPost.mockRejectedValue(new Error("Network error"))
+      mockPut.mockRejectedValue(new Error("Network error"))
+      mockDelete.mockRejectedValue(new Error("Network error"))
+      mockPatch.mockRejectedValue(new Error("Network error"))
+
+      await expect(generateFromTemplate("test-templateId")).rejects.toThrow()
+    })
+  })
 })

apps/web/src/test/pages/EditingPlanner.test.tsx

@@ -150,10 +150,12 @@ vi.mock("@/api/template-editor", () => ({
   getMediaAssets: vi.fn().mockResolvedValue({ items: [] }),
   getEditPlanGenerations: vi.fn().mockResolvedValue({ items: [] }),
   getEditPlan: vi.fn().mockResolvedValue({}),
+  createEditPlan: vi.fn().mockResolvedValue({ id: "test-plan" }),
   updateEditPlan: vi.fn().mockResolvedValue({}),
   generateEditPlan: vi.fn().mockResolvedValue({ task_id: "test-task" }),
   getGenerationStatus: vi.fn().mockResolvedValue({ status: "completed" }),
   getGenerationTaskResults: vi.fn().mockResolvedValue({ items: [] }),
+  cancelGeneration: vi.fn().mockResolvedValue({}),
   getEditPlanClips: vi.fn().mockResolvedValue({ items: [] }),
   createEditPlanClip: vi.fn().mockResolvedValue({}),
   batchDeleteEditPlanClips: vi.fn().mockResolvedValue({}),

apps/web/src/test/pages/TemplateLibrary.test.tsx

@@ -109,6 +109,7 @@ vi.mock("@/api/templates", () => ({
   getTemplate: vi.fn().mockResolvedValue({ items: [], total: 0, success: true }),
   toggleFavoriteTemplate: vi.fn().mockResolvedValue({ items: [], total: 0, success: true }),
   copyTemplate: vi.fn().mockResolvedValue({ items: [], total: 0, success: true }),
+  generateFromTemplate: vi.fn().mockResolvedValue({ items: [], total: 0, success: true }),
 }))
 
 vi.mock("@/pages/templates/TemplateLibrary.css", () => ({}))

apps/worker/video_processing/render_adapter.py

@@ -585,11 +585,14 @@ class RenderAdapter:
         try:
             from video_processing.thumbnail_generator import extract_and_upload_cover_frames
 
-            # 已渲染视频在统一渲染阶段已通过 ASS 字幕把标题烧录进画面，
-            # 抽帧天然带标题，因此这里传空字符串，避免 Pillow 二次叠加导致重影。
-            # Pillow 叠加仅用于 API 从源素材抽帧（源素材本身无标题）的兜底场景。
+            # 从 plan config 提取标题文字，叠加到封面候选帧上
+            _title_cfg = (plan_config or {}).get("title", {}) or {}
+            if not isinstance(_title_cfg, dict):
+                _title_cfg = {}
+            _title_text = (_title_cfg.get("text", "") or "").strip() if _title_cfg.get("enabled", True) else ""
+
             cover_candidates = extract_and_upload_cover_frames(
-                str(result.output_path), plan_id, num_frames=3, title_text=""
+                str(result.output_path), plan_id, num_frames=3, title_text=_title_text
             )
             if cover_candidates:
                 logger.info(

apps/worker/video_processing/thumbnail_generator.py

@@ -1,8 +1,7 @@
-"""视频封面抽帧工具 — 从视频中抽取帧作为封面，支持标题文字叠加。
+"""视频封面抽帧工具 — 从已渲染视频中抽取帧作为封面。
 
-统一封面管道：
-- 从已渲染视频抽帧：标题已通过 ASS 字幕烧进视频，帧天然带标题，无需再叠加。
-- 从源素材抽帧（API E2 兜底）：源素材无标题，通过 Pillow 在帧上绘制标题文字。
+统一封面管道：视频渲染时标题已通过 ASS 字幕烧进视频，
+渲染完成后直接从此视频抽帧，封面天然带标题，无需额外叠加逻辑。
 """
 
 from __future__ import annotations
@@ -13,38 +12,6 @@ from pathlib import Path
 
 logger = logging.getLogger(__name__)
 
-# ── 标题叠加（Pillow）──────────────────────────────────────────────────────
-# 实现统一放在 packages/shared/title_overlay.py，API 和 Worker 共用。
-
-
-def apply_title_overlay(
-    image_path: str,
-    title_text: str,
-    *,
-    position: str = "bottom",
-    font_size: int | None = None,
-    margin_ratio: float = 0.06,
-    stroke_width_ratio: float = 0.04,
-) -> str:
-    """在图片上绘制标题文字（白色 + 黑色描边/阴影）。
-
-    委托给 packages.shared.title_overlay.apply_title_to_image，
-    保持 Worker 内调用方式不变。title_text 为空时直接返回原路径。
-    """
-    from packages.shared.title_overlay import apply_title_to_image
-
-    if not title_text or not title_text.strip():
-        return image_path
-    result = apply_title_to_image(
-        image_path,
-        title_text,
-        position=position,
-        font_size=font_size,
-        margin_ratio=margin_ratio,
-        stroke_width_ratio=stroke_width_ratio,
-    )
-    return result or image_path
-
 
 def extract_first_frame(
     video_path: str,
@@ -215,8 +182,7 @@ def extract_and_upload_cover_frames(
         video_path: 视频文件路径
         plan_id: 编辑计划 ID（用于生成 storage key）
         num_frames: 抽取帧数（默认 3）
-        title_text: 标题文字；非空时用 Pillow 叠加到每帧（白色 + 黑色描边）。
-            从已渲染视频抽帧时通常传空（标题已烧录）；从源素材抽帧时传标题。
+        title_text: 标题文字（当前版本未叠加，预留参数）
 
     Returns:
         封面候选列表，每项包含 {"url": str, "position": float}
@@ -242,9 +208,6 @@ def extract_and_upload_cover_frames(
                 seek_ratio=ratio,
                 min_seek_seconds=0.5,
             )
-            # 从源素材抽帧时叠加标题文字；已渲染视频标题已烧录时传空字符串跳过
-            if title_text and title_text.strip():
-                apply_title_overlay(frame_path, title_text)
             storage_key = f"covers/{plan_id}/frame_{i}.jpg"
             url = upload_to_oss(frame_path, storage_key)
             if url:

apps/worker/worker_app/celery_app.py

@@ -19,14 +19,4 @@ celery_app.conf.imports = (
     "worker_app.tasks.batch_download",
     "worker_app.tasks._startup",
     "apps.worker.video_processing.dedup",
-    "worker_app.tasks.cleanup",
 )
-
-# Celery Beat 定时任务调度
-celery_app.conf.beat_schedule = {
-    "cleanup-stale-pending-tasks": {
-        "task": "worker.cleanup_stale_pending_tasks",
-        "schedule": 600.0,  # 每 10 分钟（秒）
-        "options": {"expires": 300},  # 5 分钟过期，避免堆积
-    },
-}

apps/worker/worker_app/tasks/_startup.py

@@ -10,9 +10,6 @@ logger = logging.getLogger(__name__)
 # 孤儿任务超时阈值：渲染任务超过此时间未更新则视为卡死
 ORPHAN_TASK_TIMEOUT_MINUTES = 10
 
-# Pending 任务超时阈值：pending 任务在队列中等待超过此时间则自动清理
-PENDING_TASK_TIMEOUT_MINUTES = 30
-
 
 def cleanup_orphan_tasks(timeout_minutes: int = ORPHAN_TASK_TIMEOUT_MINUTES) -> int:  # pragma: no cover
     """清理数据库中超时未更新的 running GenerationTask（孤儿任务）。
@@ -86,38 +83,6 @@ def cleanup_stale_jobs(timeout_minutes: int = ORPHAN_TASK_TIMEOUT_MINUTES) -> in
         return 0
 
 
-def cleanup_stale_pending_tasks(timeout_minutes: int = PENDING_TASK_TIMEOUT_MINUTES) -> int:  # pragma: no cover
-    """清理数据库中卡在 pending 状态超时的 GenerationTask。
-
-    全局任务队列有 pending 数量上限，长期卡在 pending 的任务会占满队列，
-    导致新用户无法创建任务。通过 created_at 超时判断并标记为 failed。
-
-    Args:
-        timeout_minutes: 超时时间（分钟），默认 PENDING_TASK_TIMEOUT_MINUTES
-
-    Returns:
-        清理的任务数量
-    """
-    from packages.adapters.sqlalchemy_impl.generation_task_repository import (
-        SQLAlchemyGenerationTaskRepository,
-    )
-
-    session = SessionLocal()
-    try:
-        repo = SQLAlchemyGenerationTaskRepository(session)
-        count = repo.cleanup_stale_pending(timeout_minutes)
-        if count > 0:
-            logger.warning("清理了 %d 个超时的 pending GenerationTask（超过 %d 分钟未处理）", count, timeout_minutes)
-        else:
-            logger.info("无超时 pending GenerationTask 需要清理")
-        return count
-    except Exception as e:
-        logger.error("清理超时 pending GenerationTask 失败: %s", e, exc_info=True)
-        return 0
-    finally:
-        session.close()
-
-
 def cleanup_all_stale_tasks(timeout_minutes: int = ORPHAN_TASK_TIMEOUT_MINUTES) -> dict:  # pragma: no cover
     """统一清理所有超时的孤儿任务。
 
@@ -128,17 +93,15 @@ def cleanup_all_stale_tasks(timeout_minutes: int = ORPHAN_TASK_TIMEOUT_MINUTES)
     """
     gen_count = cleanup_orphan_tasks(timeout_minutes)
     job_count = cleanup_stale_jobs(timeout_minutes)
-    pending_count = cleanup_stale_pending_tasks(PENDING_TASK_TIMEOUT_MINUTES)
-    total = gen_count + job_count + pending_count
+    total = gen_count + job_count
     if total > 0:
         logger.warning(
-            "任务清理完成: 孤儿 GenerationTask=%d, 孤儿 Job=%d, 超时 pending=%d, 总计=%d",
+            "孤儿任务清理完成: GenerationTask=%d, Job=%d, 总计=%d",
             gen_count,
             job_count,
-            pending_count,
             total,
         )
-    return {"generation_tasks": gen_count, "jobs": job_count, "pending": pending_count}
+    return {"generation_tasks": gen_count, "jobs": job_count}
 
 
 @worker_ready.connect

apps/worker/worker_app/tasks/cleanup.py

@@ -1,35 +0,0 @@
-"""定期清理任务 — Celery Beat 调度。
-
-包含：
-- cleanup_stale_pending_tasks: 定期清理卡在 pending 超时的 generation_tasks
-"""
-
-import logging
-
-from celery import shared_task
-from worker_app.tasks._startup import (
-    PENDING_TASK_TIMEOUT_MINUTES,
-    cleanup_stale_pending_tasks,
-)
-
-logger = logging.getLogger(__name__)
-
-
-@shared_task(name="worker.cleanup_stale_pending_tasks")
-def scheduled_cleanup_stale_pending(timeout_minutes: int = PENDING_TASK_TIMEOUT_MINUTES) -> dict:
-    """Celery Beat 调度的定期任务：清理超时的 pending 任务。
-
-    每 10 分钟执行一次（由 celery_app.py 的 beat_schedule 配置），
-    查找所有 status='pending' 且 created_at < NOW() - timeout_minutes
-    的 generation_tasks，批量更新为 failed。
-
-    Args:
-        timeout_minutes: 超时时间（分钟），默认 30 分钟
-
-    Returns:
-        {"cleaned": int}
-    """
-    count = cleanup_stale_pending_tasks(timeout_minutes)
-    if count > 0:
-        logger.info("[Beat] 清理了 %d 个超时 pending 任务（超时阈值 %d 分钟）", count, timeout_minutes)
-    return {"cleaned": count}

apps/worker/worker_app/tasks/generation.py

@@ -967,14 +967,14 @@ def _render_video(
     bgm_config: dict | None = None,
     voice_ids: list[str] | None = None,
     custom_title: str = "",
-) -> tuple[Path, float, list[dict] | None]:
+) -> tuple[Path, float]:
     """渲染视频（含配音混音）。
 
     使用 RenderAdapter 统一渲染入口，复用 BGM/ASR/分辨率/缩略图逻辑。
 
     Args:
     Returns:
-        (output_path, render_duration, cover_candidates)
+        (output_path, render_duration)
     """
     if not downloaded_videos:
         raise RuntimeError(f"素材下载结果为空: task_id={task_id}")
@@ -1113,10 +1113,8 @@ def _render_video(
 
     # 配音素材库音频已在统一渲染引擎内部通过 audio 图层混音处理
     output_path = render_output_path
-    # RenderAdapter 在渲染完成后用本地 ffmpeg 抽取的封面候选帧（已上传 OSS）
-    cover_candidates = getattr(render_result, "cover_candidates", None)
 
-    return output_path, render_duration, cover_candidates
+    return output_path, render_duration
 
 
 def _upload_and_record(
@@ -1387,7 +1385,7 @@ def generate_video(self, task_id: str) -> dict:
             else:
                 _resolved_resolution = task_info.get("resolution", "")
 
-            output_path, render_duration, cover_candidates = _render_video(
+            output_path, render_duration = _render_video(
                 task_id=task_id,
                 downloaded_videos=downloaded_videos,
                 voice_path=audio_path,
@@ -1432,47 +1430,51 @@ def generate_video(self, task_id: str) -> dict:
 
             _update_task_progress(task_id, 95, "上传完成")
 
-            # ── 4.5 封面帧持久化 ────────────────────────────────────────────
-            # RenderAdapter 在渲染完成后已用本地 ffmpeg 从 output_path 抽帧
-            # （标题通过 ASS 烧录，帧天然带标题），并上传 OSS 返回 cover_candidates。
-            # 这里把第一帧写入 gen_task.cover_url，完整列表写入 metadata，
-            # 封面路由（generation_cover.py）的 A/B/C/D 步骤即可直接命中。
+            # ── 4.5 封面抽帧 ────────────────────────────────────────────────
+            # 预览视频上传完成后，提取封面帧写入 gen_task.cover_url
+            # 这样封面路由（generation_cover.py 步骤A）可以通过 generation_task_id 直接找到
             try:
-                if cover_candidates:
-                    first = cover_candidates[0]
-                    # 候选帧字段兼容：RenderAdapter 用 image_url，thumbnail_generator 用 url
-                    cover_frame_url = first.get("image_url") or first.get("url") or ""
-                    if cover_frame_url:
-                        _cover_session = SessionLocal()
-                        try:
-                            from packages.adapters.sqlalchemy_impl.models import (
-                                GenerationTaskModel,
-                            )
+                from packages.shared.mediakit_client import get_mediakit_client
 
-                            _cover_model = (
-                                _cover_session.query(GenerationTaskModel)
-                                .filter(GenerationTaskModel.id == task_id)
-                                .first()
-                            )
-                            if _cover_model:
-                                _cover_model.cover_url = cover_frame_url
-                                # 持久化完整候选列表到 metadata
-                                meta = dict(_cover_model.metadata or {})
-                                meta["cover_candidates"] = cover_candidates
-                                _cover_model.metadata = meta
-                                _cover_session.commit()
-                                logger.info(
-                                    "[task_id=%s] 封面帧已持久化(ffmpeg本地抽帧): cover_url=%s candidates=%d",
-                                    task_id,
-                                    cover_frame_url[:80],
-                                    len(cover_candidates),
+                mk_client = get_mediakit_client()
+                if mk_client.is_available:
+                    _update_task_progress(task_id, 96, "提取封面帧")
+                    snapshots = mk_client.extract_frames(
+                        video_url=file_url,
+                        strategy="SpecifiedFrames",
+                        max_frames=1,
+                    )
+                    if snapshots and len(snapshots) > 0:
+                        cover_frame_url = snapshots[0].get("image_url", "")
+                        if cover_frame_url and gen_task:
+                            # 通过独立 session 持久化 cover_url
+                            _cover_session = SessionLocal()
+                            try:
+                                from packages.adapters.sqlalchemy_impl.models import (
+                                    GenerationTaskModel,
                                 )
-                        finally:
-                            _cover_session.close()
+
+                                _cover_model = (
+                                    _cover_session.query(GenerationTaskModel)
+                                    .filter(GenerationTaskModel.id == task_id)
+                                    .first()
+                                )
+                                if _cover_model:
+                                    _cover_model.cover_url = cover_frame_url
+                                    _cover_session.commit()
+                                    logger.info(
+                                        "[task_id=%s] 封面帧提取成功: %s",
+                                        task_id,
+                                        cover_frame_url[:80],
+                                    )
+                            finally:
+                                _cover_session.close()
+                    else:
+                        logger.warning("[task_id=%s] 封面帧提取返回空结果", task_id)
                 else:
-                    logger.warning("[task_id=%s] 渲染未产出 cover_candidates，封面将依赖 API 兜底", task_id)
+                    logger.warning("[task_id=%s] MediaKit 未配置，跳过封面帧提取", task_id)
             except Exception:
-                logger.warning("[task_id=%s] 封面帧持久化失败（不影响主流程）", task_id, exc_info=True)
+                logger.warning("[task_id=%s] 封面帧提取失败（不影响主流程）", task_id, exc_info=True)
 
             # ── 5. 标记完成 ──────────────────────────────────────────────────
             _update_task_status(task_id, "mark_completed", result_count=video_count)

infra/docker/api-base.Dockerfile

@@ -17,8 +17,6 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     libpq-dev \
     libpq5 \
     ffmpeg \
-    fonts-noto-cjk \
-    fontconfig \
     && rm -rf /var/lib/apt/lists/*
 
 # 创建虚拟环境

infra/docker/entrypoint-worker.sh

@@ -6,13 +6,8 @@ set -e
 
 CONCURRENCY="${WORKER_CONCURRENCY:-2}"
 
-# ⚠️ 部署约束：此 Worker 必须且只能运行单实例（replicas=1）
-# -B 标志嵌入 celery beat，beat 负责定期触发 pending 超时清理等定时任务
-# 多实例部署会导致每个 Worker 独立运行 Beat，造成定时任务重复执行
-# 若需横向扩展 Worker，必须将 Beat 拆分为独立服务（celery beat -A worker_app.celery_app）
 exec celery \
   -A worker_app.celery_app \
   worker \
   --loglevel=info \
-  "-B" \
   "--concurrency=${CONCURRENCY}"

packages/adapters/sqlalchemy_impl/generation_task_repository.py

@@ -310,42 +310,3 @@ class SQLAlchemyGenerationTaskRepository:
             model.completed_at = datetime.now(timezone.utc)
         self.session.commit()
         return len(models)
-
-    def cleanup_stale_pending(self, timeout_minutes: int = 30) -> int:
-        """清理超时的 pending 任务（未被 Worker 拉取的任务）。
-
-        全局任务队列有 pending 数量上限，长期卡在 pending 的任务会占满队列，
-        导致新用户无法创建任务。将超时的 pending 任务标记为 failed。
-
-        Args:
-            timeout_minutes: 超时时间（分钟），默认 30 分钟
-
-        Returns:
-            清理的任务数量
-        """
-        from datetime import timedelta
-
-        cutoff = datetime.now(timezone.utc) - timedelta(minutes=timeout_minutes)
-        error_info = {
-            "error_type": "PendingTimeout",
-            "message": f"任务在 pending 状态停留超过 {timeout_minutes} 分钟，自动清理",
-            "failed_at": datetime.now(timezone.utc).isoformat(),
-        }
-        count = (
-            self.session.query(GenerationTaskModel)
-            .filter(
-                GenerationTaskModel.status == GenerationTaskStatus.PENDING.value,
-                GenerationTaskModel.created_at < cutoff,
-            )
-            .update(
-                {
-                    GenerationTaskModel.status: GenerationTaskStatus.FAILED.value,
-                    GenerationTaskModel.error_message: "pending timeout: auto cleanup",
-                    GenerationTaskModel.error_info: error_info,
-                    GenerationTaskModel.completed_at: datetime.now(timezone.utc),
-                },
-                synchronize_session=False,
-            )
-        )
-        self.session.commit()
-        return count

packages/shared/mediakit_client.py

@@ -364,7 +364,7 @@ class MediaKitClient:
                 data = response.json()
 
                 status = data.get("status")
-                if status in ("completed", "success"):
+                if status == "success":
                     result = data.get("result", {})
                     snapshots = result.get("snapshots", [])
                     logger.info(

packages/shared/title_overlay.py

@@ -1,153 +0,0 @@
-"""封面标题文字叠加（Pillow）— API / Worker 共用。
-
-在封面帧上绘制白色标题文字 + 黑色描边/阴影，支持 CJK 字体和自动换行。
-从已渲染视频抽帧时通常不需要调用（标题已烧录）；
-从源素材抽帧（API E2 兜底）时调用，保证封面带标题。
-"""
-
-from __future__ import annotations
-
-import logging
-from pathlib import Path
-from typing import Optional
-
-logger = logging.getLogger(__name__)
-
-# 按优先级查找 CJK 字体（Debian/Ubuntu fonts-noto-cjk 安装路径）
-_FONT_CANDIDATES = (
-    "/usr/share/fonts/opentype/noto/NotoSansCJK-Bold.ttc",
-    "/usr/share/fonts/opentype/noto/NotoSansCJK-Regular.ttc",
-    "/usr/share/fonts/truetype/noto/NotoSansCJK-Bold.ttc",
-    "/usr/share/fonts/truetype/noto/NotoSansCJK-Regular.ttc",
-    "/usr/share/fonts/truetype/wqy/wqy-zenhei.ttc",
-)
-
-
-def find_title_font(size: int):
-    """查找可用的 CJK 字体并返回 PIL ImageFont，找不到返回 None。"""
-    try:
-        from PIL import ImageFont
-    except ImportError:
-        return None
-
-    for fp in _FONT_CANDIDATES:
-        if Path(fp).exists():
-            try:
-                return ImageFont.truetype(fp, size=size)
-            except Exception:
-                continue
-    logger.warning("未找到 CJK 字体，标题叠加将使用 PIL 默认字体（中文可能显示为方块）")
-    return ImageFont.load_default()
-
-
-def wrap_title_text(text: str, font, max_width: int) -> list[str]:
-    """按像素宽度对中英文混合文本自动换行，支持显式 \\n。"""
-    lines: list[str] = []
-    current = ""
-    for ch in text:
-        if ch == "\n":
-            if current:
-                lines.append(current)
-            current = ""
-            continue
-        trial = current + ch
-        try:
-            bbox = font.getbbox(trial)
-            width = bbox[2] - bbox[0]
-        except Exception:
-            width = len(trial) * (font.size // 2)
-        if width <= max_width:
-            current = trial
-        else:
-            if current:
-                lines.append(current)
-            current = ch
-    if current:
-        lines.append(current)
-    return lines
-
-
-def apply_title_to_image(
-    image_path: str,
-    title_text: str,
-    *,
-    position: str = "bottom",
-    font_size: Optional[int] = None,
-    margin_ratio: float = 0.06,
-    stroke_width_ratio: float = 0.04,
-) -> Optional[str]:
-    """在图片上绘制标题文字并覆盖保存。
-
-    Args:
-        image_path: 图片路径（处理结果覆盖写回）
-        title_text: 标题文字；为空直接返回 None 表示跳过
-        position: top / center / bottom
-        font_size: 字号，None 时按图片宽度自动计算
-        margin_ratio: 边缘留白占短边比例
-        stroke_width_ratio: 描边宽度占字号比例
-
-    Returns:
-        成功返回 image_path；标题为空或 PIL 不可用返回 None。
-    """
-    if not title_text or not title_text.strip():
-        return None
-
-    try:
-        from PIL import Image, ImageDraw
-    except ImportError:
-        logger.warning("Pillow 未安装，跳过标题叠加: image=%s", image_path)
-        return None
-
-    img = Image.open(image_path).convert("RGB")
-    draw = ImageDraw.Draw(img)
-    img_w, img_h = img.size
-
-    if font_size is None:
-        font_size = max(28, min(72, img_w // 16))
-
-    font = find_title_font(font_size)
-    if font is None:
-        return None
-
-    stroke_width = max(2, int(font_size * stroke_width_ratio))
-    margin = int(min(img_w, img_h) * margin_ratio)
-    max_text_width = img_w - 2 * margin
-
-    lines = wrap_title_text(title_text.strip(), font, max_text_width)
-    if not lines:
-        return None
-
-    line_heights = []
-    for ln in lines:
-        bbox = font.getbbox(ln)
-        line_heights.append(bbox[3] - bbox[1])
-    line_height = max(line_heights) if line_heights else font_size
-    line_gap = int(line_height * 0.3)
-    total_height = len(lines) * line_height + (len(lines) - 1) * line_gap
-
-    if position == "top":
-        y_start = margin
-    elif position == "center":
-        y_start = (img_h - total_height) // 2
-    else:
-        y_start = img_h - total_height - margin
-
-    for i, ln in enumerate(lines):
-        bbox = font.getbbox(ln)
-        line_w = bbox[2] - bbox[0]
-        x = (img_w - line_w) // 2
-        y = y_start + i * (line_height + line_gap)
-        # 阴影
-        draw.text((x + 2, y + 2), ln, font=font, fill=(0, 0, 0))
-        # 白色文字 + 黑色描边
-        draw.text(
-            (x, y),
-            ln,
-            font=font,
-            fill=(255, 255, 255),
-            stroke_width=stroke_width,
-            stroke_fill=(0, 0, 0),
-        )
-
-    img.save(image_path, "JPEG", quality=92)
-    return image_path

requirements-base.txt

@@ -29,4 +29,3 @@ httpx==0.27.2
 
 # Prometheus monitoring
 prometheus-client==0.21.1
-Pillow==10.4.0

tests/unit/test_1294_preview_voice_injection.py

@@ -158,7 +158,7 @@ class TestRenderVideoVoiceInjection:
 
             from packages.domain import EditingMode
 
-            output_path, render_duration, cover_candidates = _render_video(
+            output_path, render_duration = _render_video(
                 task_id="test_task_123",
                 downloaded_videos=[Path("/tmp/video1.mp4")],
                 voice_path=None,

tests/unit/test_generation_cover.py

@@ -182,7 +182,6 @@ class TestUnifiedCoverPipelineEndpoint:
         with (
             patch("app.api.routes.generation_cover.SQLAlchemyGenerationTaskRepository") as mock_repo_cls,
             patch("packages.shared.storage.get_shared_storage_service") as mock_storage_getter,
-            patch("packages.shared.mediakit_client.get_mediakit_client") as mock_mk_getter,
         ):
             mock_repo = MagicMock()
             mock_repo.get.return_value = mock_task
@@ -195,13 +194,6 @@ class TestUnifiedCoverPipelineEndpoint:
             mock_storage_svc.get_url.return_value = "https://oss.example.com/rendered/plan-2/video.mp4"
             mock_storage_getter.return_value = mock_storage_svc
 
-            # MediaKit 抽帧也返回 None，模拟最终失败
-            mock_mk = MagicMock()
-            mock_mk.is_available = True
-            mock_mk.extract_frames.return_value = None
-            mock_mk_getter.return_value = mock_mk
-
-            # body 不传 asset_ids，步骤 E2 不会进入
             from app.api.routes.generation_cover import generate_cover
 
             with pytest.raises(HTTPException) as exc_info:
@@ -215,6 +207,7 @@ class TestUnifiedCoverPipelineEndpoint:
                 )
 
             assert exc_info.value.status_code == 400
+            assert "封面尚未生成" in exc_info.value.detail
 
     def test_cover_url_found_via_source_edit_plan(self):
         """步骤B：通过 source_edit_plan_id 找到预览任务的 cover_url。"""
@@ -325,157 +318,6 @@ class TestUnifiedCoverPipelineEndpoint:
                 template_id="template-y",
             )
 
-    def test_cover_url_found_via_cover_candidates_image_url(self):
-        """步骤D：plan.config.cover_candidates 有 image_url 时，直接使用第一个候选封面。"""
-        from unittest.mock import MagicMock, patch
-
-        from app.api.routes.generation_cover import GenerateCoverRequest
-
-        mock_plan = MagicMock()
-        # 步骤A/B/C 都找不到，进入步骤D
-        mock_plan.config = {
-            "rendered_storage_key": "rendered/plan-z/video.mp4",  # 必须有预览视频才能通过前置检查
-            "cover_candidates": [
-                {"image_url": "https://oss.example.com/candidates/cover-1.jpg", "score": 0.95},
-                {"image_url": "https://oss.example.com/candidates/cover-2.jpg", "score": 0.80},
-            ],
-        }
-
-        mock_plan_svc = MagicMock()
-        mock_plan_svc.get_plan_or_raise.return_value = mock_plan
-        mock_template_svc = MagicMock()
-        mock_db = MagicMock()
-
-        body = GenerateCoverRequest(cover_type="ai_frame")
-
-        with (
-            patch("app.api.routes.generation_cover.SQLAlchemyGenerationTaskRepository") as mock_repo_cls,
-            patch("app.api.routes.generation_cover.normalize_plan_config") as mock_normalize,
-        ):
-            mock_repo = MagicMock()
-            mock_repo.get.return_value = None
-            mock_repo.list_by_source_edit_plan.return_value = []
-            mock_repo.list_latest_completed_preview.return_value = []
-            mock_repo_cls.return_value = mock_repo
-
-            mock_normalize.return_value = {
-                "cover": {"type": "ai_frame", "image_url": "https://oss.example.com/candidates/cover-1.jpg"}
-            }
-
-            from app.api.routes.generation_cover import generate_cover
-
-            result = generate_cover(
-                body=body,
-                template_id="template-z",
-                plan_id="plan-z",
-                services=(mock_template_svc, mock_plan_svc),
-                db=mock_db,
-                current_user=MagicMock(),
-            )
-
-            # 步骤D从 cover_candidates 第一个元素的 image_url 提取封面
-            assert result.cover["image_url"] == "https://oss.example.com/candidates/cover-1.jpg"
-            # 验证 plan.config 被更新（至少调用一次：rendered_storage_key + cover）
-            assert mock_plan_svc.update_plan_config.call_count >= 1
-
-    def test_cover_url_found_via_cover_candidates_url_key(self):
-        """步骤D：cover_candidates 用 url 键（非 image_url）时，也能正确提取。"""
-        from unittest.mock import MagicMock, patch
-
-        from app.api.routes.generation_cover import GenerateCoverRequest
-
-        mock_plan = MagicMock()
-        mock_plan.config = {
-            "rendered_storage_key": "rendered/plan-w/video.mp4",  # 必须有预览视频才能通过前置检查
-            "cover_candidates": [
-                {"url": "https://oss.example.com/candidates/alt-cover.jpg"},
-            ],
-        }
-
-        mock_plan_svc = MagicMock()
-        mock_plan_svc.get_plan_or_raise.return_value = mock_plan
-        mock_template_svc = MagicMock()
-        mock_db = MagicMock()
-
-        body = GenerateCoverRequest(cover_type="ai_frame")
-
-        with (
-            patch("app.api.routes.generation_cover.SQLAlchemyGenerationTaskRepository") as mock_repo_cls,
-            patch("app.api.routes.generation_cover.normalize_plan_config") as mock_normalize,
-        ):
-            mock_repo = MagicMock()
-            mock_repo.get.return_value = None
-            mock_repo.list_by_source_edit_plan.return_value = []
-            mock_repo.list_latest_completed_preview.return_value = []
-            mock_repo_cls.return_value = mock_repo
-
-            mock_normalize.return_value = {
-                "cover": {"type": "ai_frame", "image_url": "https://oss.example.com/candidates/alt-cover.jpg"}
-            }
-
-            from app.api.routes.generation_cover import generate_cover
-
-            result = generate_cover(
-                body=body,
-                template_id="template-w",
-                plan_id="plan-w",
-                services=(mock_template_svc, mock_plan_svc),
-                db=mock_db,
-                current_user=MagicMock(),
-            )
-
-            # 步骤D fallback 到 url 键
-            assert result.cover["image_url"] == "https://oss.example.com/candidates/alt-cover.jpg"
-
-    def test_cover_candidates_skips_non_dict_first_element(self):
-        """步骤D：cover_candidates 第一个元素不是 dict 时，安全跳过不崩溃。"""
-        from unittest.mock import MagicMock, patch
-
-        from app.api.routes.generation_cover import GenerateCoverRequest
-        from fastapi import HTTPException
-
-        mock_plan = MagicMock()
-        mock_plan.config = {
-            "rendered_storage_key": "rendered/plan-skip/video.mp4",  # 必须有预览视频才能通过前置检查
-            "cover_candidates": ["not-a-dict", 42, None],
-        }
-
-        mock_plan_svc = MagicMock()
-        mock_plan_svc.get_plan_or_raise.return_value = mock_plan
-        mock_template_svc = MagicMock()
-        mock_db = MagicMock()
-
-        body = GenerateCoverRequest(cover_type="ai_frame")
-
-        with (
-            patch("app.api.routes.generation_cover.SQLAlchemyGenerationTaskRepository") as mock_repo_cls,
-            patch("packages.shared.storage.get_shared_storage_service") as mock_storage_getter,
-        ):
-            mock_repo = MagicMock()
-            mock_repo.get.return_value = None
-            mock_repo.list_by_source_edit_plan.return_value = []
-            mock_repo.list_latest_completed_preview.return_value = []
-            mock_repo_cls.return_value = mock_repo
-
-            # storage fallback 也找不到封面
-            mock_storage_svc = MagicMock()
-            mock_storage_svc.get_url.return_value = ""
-            mock_storage_getter.return_value = mock_storage_svc
-
-            from app.api.routes.generation_cover import generate_cover
-
-            # 所有步骤都失败，应返回 400
-            with pytest.raises(HTTPException) as exc_info:
-                generate_cover(
-                    body=body,
-                    template_id="template-skip",
-                    plan_id="plan-skip",
-                    services=(mock_template_svc, mock_plan_svc),
-                    db=mock_db,
-                    current_user=MagicMock(),
-                )
-            assert exc_info.value.status_code == 400
-
 
 class TestSourceEditPlanFallback:
     """测试步骤 2.5：通过 source_edit_plan_id 查找预览视频兜底逻辑。"""
@@ -845,205 +687,3 @@ class TestUploadCoverType:
             assert result.cover["image_url"] == "https://oss.example.com/uploaded/my-cover.png"
             # 验证没有调用任何预览视频查找逻辑
             # (normalize_plan_config 是唯一被调用的外部函数)
-
-    def test_cover_extracted_from_source_asset_when_no_preview(self):
-        """步骤E2：无后端渲染产物时，直接从用户选择的视频素材抽帧。"""
-        from unittest.mock import MagicMock, patch
-
-        from app.api.routes.generation_cover import GenerateCoverRequest
-
-        mock_plan = MagicMock()
-        mock_plan.config = {}  # 无 rendered_storage_key，无 generation_task_id
-
-        mock_plan_svc = MagicMock()
-        mock_plan_svc.get_plan_or_raise.return_value = mock_plan
-        mock_template_svc = MagicMock()
-        mock_db = MagicMock()
-
-        # 模拟视频素材
-        mock_asset = MagicMock()
-        mock_asset.file_type = "video"
-        mock_asset.storage_key = "uploads/source-clip.mp4"
-
-        mock_asset_repo = MagicMock()
-        mock_asset_repo.get.return_value = mock_asset
-
-        mock_mk = MagicMock()
-        mock_mk.is_available = True
-        mock_mk.extract_frames.return_value = [{"image_url": "https://mediakit.internal/frame-abc.jpg"}]
-
-        mock_storage = MagicMock()
-        mock_storage.get_url.return_value = "https://oss.example.com/uploads/source-clip.mp4"
-
-        body = GenerateCoverRequest(
-            cover_type="ai_frame",
-            asset_ids=["asset-video-1"],
-        )
-
-        with (
-            patch("app.api.routes.generation_cover.SQLAlchemyGenerationTaskRepository") as mock_repo_cls,
-            patch(
-                "packages.adapters.sqlalchemy_impl.asset_repository.SQLAlchemyAssetRepository",
-                return_value=mock_asset_repo,
-            ),
-            patch("packages.shared.mediakit_client.get_mediakit_client", return_value=mock_mk),
-            patch("packages.shared.storage.get_shared_storage_service", return_value=mock_storage),
-            patch(
-                "app.api.routes.generation_cover._persist_cover_frame",
-                return_value="https://oss.example.com/covers/final.jpg",
-            ),
-            patch("app.api.routes.generation_cover.normalize_plan_config") as mock_normalize,
-        ):
-            mock_repo = MagicMock()
-            mock_repo.get.return_value = None
-            mock_repo.list_by_source_edit_plan.return_value = []
-            mock_repo.list_latest_completed_preview.return_value = []
-            mock_repo_cls.return_value = mock_repo
-            mock_normalize.return_value = {
-                "cover": {"type": "ai_frame", "image_url": "https://oss.example.com/covers/final.jpg"}
-            }
-
-            from app.api.routes.generation_cover import generate_cover
-
-            result = generate_cover(
-                body=body,
-                template_id="tpl-source",
-                plan_id="plan-source",
-                services=(mock_template_svc, mock_plan_svc),
-                db=mock_db,
-                current_user=MagicMock(),
-            )
-
-            assert result.cover["image_url"] == "https://oss.example.com/covers/final.jpg"
-            mock_mk.extract_frames.assert_called_once()
-            # 确保用的是源素材 URL
-            call_kwargs = mock_mk.extract_frames.call_args.kwargs
-            assert "source-clip.mp4" in call_kwargs["video_url"]
-
-    def test_e2_passes_plan_title_to_persist_for_overlay(self):
-        """步骤E2：plan.config.title.text 存在时，作为 title_text 传给 _persist_cover_frame 叠加标题。"""
-        from unittest.mock import MagicMock, patch
-
-        from app.api.routes.generation_cover import GenerateCoverRequest
-
-        mock_plan = MagicMock()
-        mock_plan.config = {"title": {"enabled": True, "text": "我的视频标题"}}
-
-        mock_plan_svc = MagicMock()
-        mock_plan_svc.get_plan_or_raise.return_value = mock_plan
-        mock_template_svc = MagicMock()
-        mock_db = MagicMock()
-
-        mock_asset = MagicMock()
-        mock_asset.file_type = "video"
-        mock_asset.storage_key = "uploads/src.mp4"
-        mock_asset_repo = MagicMock()
-        mock_asset_repo.get.return_value = mock_asset
-
-        mock_mk = MagicMock()
-        mock_mk.is_available = True
-        mock_mk.extract_frames.return_value = [{"image_url": "https://mk/frame.jpg"}]
-
-        mock_storage = MagicMock()
-        mock_storage.get_url.return_value = "https://oss.example.com/uploads/src.mp4"
-
-        body = GenerateCoverRequest(cover_type="ai_frame", asset_ids=["a1"])
-
-        with (
-            patch("app.api.routes.generation_cover.SQLAlchemyGenerationTaskRepository") as mock_repo_cls,
-            patch(
-                "packages.adapters.sqlalchemy_impl.asset_repository.SQLAlchemyAssetRepository",
-                return_value=mock_asset_repo,
-            ),
-            patch("packages.shared.mediakit_client.get_mediakit_client", return_value=mock_mk),
-            patch("packages.shared.storage.get_shared_storage_service", return_value=mock_storage),
-            patch(
-                "app.api.routes.generation_cover._persist_cover_frame",
-                return_value="https://oss.example.com/covers/final.jpg",
-            ) as mock_persist,
-            patch("app.api.routes.generation_cover.normalize_plan_config") as mock_normalize,
-        ):
-            mock_repo = MagicMock()
-            mock_repo.get.return_value = None
-            mock_repo.list_by_source_edit_plan.return_value = []
-            mock_repo.list_latest_completed_preview.return_value = []
-            mock_repo_cls.return_value = mock_repo
-            mock_normalize.return_value = {
-                "cover": {"type": "ai_frame", "image_url": "https://oss.example.com/covers/final.jpg"}
-            }
-
-            from app.api.routes.generation_cover import generate_cover
-
-            result = generate_cover(
-                body=body,
-                template_id="tpl",
-                plan_id="plan-title",
-                services=(mock_template_svc, mock_plan_svc),
-                db=mock_db,
-                current_user=MagicMock(),
-            )
-
-            assert result.cover["image_url"] == "https://oss.example.com/covers/final.jpg"
-            # 标题文字必须透传给持久化函数（用于源素材帧叠加标题）
-            assert mock_persist.call_args.kwargs.get("title_text") == "我的视频标题"
-
-    def test_step_e_skips_non_video_assets(self):
-        """步骤E2：asset_ids 里只有图片素材时，不调用 MediaKit 并返回 400。"""
-        from unittest.mock import MagicMock, patch
-
-        from app.api.routes.generation_cover import GenerateCoverRequest
-        from fastapi import HTTPException
-
-        mock_plan = MagicMock()
-        mock_plan.config = {}
-
-        mock_plan_svc = MagicMock()
-        mock_plan_svc.get_plan_or_raise.return_value = mock_plan
-        mock_template_svc = MagicMock()
-        mock_db = MagicMock()
-
-        mock_image_asset = MagicMock()
-        mock_image_asset.file_type = "image"
-        mock_image_asset.storage_key = "uploads/photo.png"
-
-        mock_asset_repo = MagicMock()
-        mock_asset_repo.get.return_value = mock_image_asset
-
-        mock_mk = MagicMock()
-        mock_mk.is_available = True
-
-        body = GenerateCoverRequest(
-            cover_type="ai_frame",
-            asset_ids=["asset-img-1"],
-        )
-
-        with (
-            patch("app.api.routes.generation_cover.SQLAlchemyGenerationTaskRepository") as mock_repo_cls,
-            patch(
-                "packages.adapters.sqlalchemy_impl.asset_repository.SQLAlchemyAssetRepository",
-                return_value=mock_asset_repo,
-            ),
-            patch("packages.shared.mediakit_client.get_mediakit_client", return_value=mock_mk),
-            patch("packages.shared.storage.get_shared_storage_service") as mock_storage_getter,
-        ):
-            mock_repo = MagicMock()
-            mock_repo.get.return_value = None
-            mock_repo.list_by_source_edit_plan.return_value = []
-            mock_repo.list_latest_completed_preview.return_value = []
-            mock_repo_cls.return_value = mock_repo
-            mock_storage_getter.return_value = MagicMock()
-
-            from app.api.routes.generation_cover import generate_cover
-
-            with pytest.raises(HTTPException) as exc_info:
-                generate_cover(
-                    body=body,
-                    template_id="tpl-img",
-                    plan_id="plan-img",
-                    services=(mock_template_svc, mock_plan_svc),
-                    db=mock_db,
-                    current_user=MagicMock(),
-                )
-
-            assert exc_info.value.status_code == 400
-            mock_mk.extract_frames.assert_not_called()

tests/unit/test_generation_task_pending_cleanup.py

@@ -1,151 +0,0 @@
-"""GenerationTaskRepository - cleanup_stale_pending 超时 pending 清理单元测试。"""
-
-import sys
-from datetime import datetime, timedelta, timezone
-from pathlib import Path
-
-sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "apps" / "api"))
-
-from sqlalchemy import create_engine, text
-from sqlalchemy.orm import sessionmaker
-
-from packages.adapters.sqlalchemy_impl.generation_task_repository import (
-    SQLAlchemyGenerationTaskRepository,
-)
-from packages.adapters.sqlalchemy_impl.models import Base
-from packages.domain import GenerationTask, GenerationTaskStatus
-
-
-def _repository():
-    engine = create_engine("sqlite:///:memory:")
-    Base.metadata.create_all(engine)
-    session = sessionmaker(bind=engine)()
-    return SQLAlchemyGenerationTaskRepository(session), session, engine
-
-
-def _make_task(**kwargs) -> GenerationTask:
-    defaults = dict(
-        project_id="proj-1",
-        asset_library_id="lib-1",
-        created_by_user_id="user-1",
-    )
-    defaults.update(kwargs)
-    return GenerationTask.create(**defaults)
-
-
-# ---------------------------------------------------------------------------
-# cleanup_stale_pending 基本测试
-# ---------------------------------------------------------------------------
-
-
-def test_cleanup_stale_pending_no_tasks_returns_zero():
-    """没有任务时返回 0。"""
-    repo, _, _ = _repository()
-    count = repo.cleanup_stale_pending(timeout_minutes=30)
-    assert count == 0
-
-
-def test_cleanup_stale_pending_recent_pending_not_cleaned():
-    """30 分钟内的 pending 任务不被清理。"""
-    repo, _, _ = _repository()
-    task = _make_task()
-    repo.create(task)
-    # 刚创建的 pending 任务不应被清理
-    count = repo.cleanup_stale_pending(timeout_minutes=30)
-    assert count == 0
-    assert repo.get(task.id).status == GenerationTaskStatus.PENDING
-
-
-def test_cleanup_stale_pending_old_pending_marked_failed():
-    """超过 30 分钟的 pending 任务被标记为 failed。"""
-    repo, _, engine = _repository()
-    task = _make_task()
-    repo.create(task)
-
-    # 手动把 created_at 改到 1 小时前
-    with engine.connect() as conn:
-        conn.execute(
-            text("UPDATE generation_tasks SET created_at = :ts WHERE id = :id"),
-            {"ts": datetime.now(timezone.utc) - timedelta(hours=1), "id": task.id},
-        )
-        conn.commit()
-
-    count = repo.cleanup_stale_pending(timeout_minutes=30)
-    assert count == 1
-
-    saved = repo.get(task.id)
-    assert saved.status == GenerationTaskStatus.FAILED
-    assert saved.error_message == "pending timeout: auto cleanup"
-    assert saved.error_info.get("error_type") == "PendingTimeout"
-    assert "30" in saved.error_info["message"]
-    assert "failed_at" in saved.error_info
-    assert saved.completed_at is not None
-
-
-def test_cleanup_stale_pending_running_not_touched():
-    """running 任务不受影响，只清理 pending。"""
-    repo, _, engine = _repository()
-    task = _make_task()
-    repo.create(task)
-    task.mark_processing()
-    repo.update(task)
-
-    # 回写 created_at 到 1 小时前
-    with engine.connect() as conn:
-        conn.execute(
-            text("UPDATE generation_tasks SET created_at = :ts WHERE id = :id"),
-            {"ts": datetime.now(timezone.utc) - timedelta(hours=1), "id": task.id},
-        )
-        conn.commit()
-
-    count = repo.cleanup_stale_pending(timeout_minutes=30)
-    assert count == 0
-    assert repo.get(task.id).status == GenerationTaskStatus.RUNNING
-
-
-def test_cleanup_stale_pending_custom_timeout():
-    """自定义超时时间生效。"""
-    repo, _, engine = _repository()
-    task = _make_task()
-    repo.create(task)
-
-    # 回写 created_at 到 20 分钟前
-    with engine.connect() as conn:
-        conn.execute(
-            text("UPDATE generation_tasks SET created_at = :ts WHERE id = :id"),
-            {"ts": datetime.now(timezone.utc) - timedelta(minutes=20), "id": task.id},
-        )
-        conn.commit()
-
-    # 30 分钟超时：不清理
-    count_30 = repo.cleanup_stale_pending(timeout_minutes=30)
-    assert count_30 == 0
-    # 15 分钟超时：清理
-    count_15 = repo.cleanup_stale_pending(timeout_minutes=15)
-    assert count_15 == 1
-    assert repo.get(task.id).status == GenerationTaskStatus.FAILED
-
-
-def test_cleanup_stale_pending_multiple():
-    """批量清理多个超时的 pending 任务。"""
-    repo, _, engine = _repository()
-
-    tasks = []
-    for i in range(5):
-        t = _make_task(project_id=f"proj-{i}")
-        repo.create(t)
-        tasks.append(t)
-
-    # 全部回写 created_at 到 2 小时前
-    with engine.connect() as conn:
-        for t in tasks:
-            conn.execute(
-                text("UPDATE generation_tasks SET created_at = :ts WHERE id = :id"),
-                {"ts": datetime.now(timezone.utc) - timedelta(hours=2), "id": t.id},
-            )
-        conn.commit()
-
-    count = repo.cleanup_stale_pending(timeout_minutes=30)
-    assert count == 5
-    for t in tasks:
-        assert repo.get(t.id).status == GenerationTaskStatus.FAILED

tests/unit/test_generation_worker_fixes.py

@@ -13,18 +13,6 @@ os.environ.setdefault("JWT_SECRET_KEY", "unit-test-secret")
 os.environ.setdefault("DATABASE_URL", "sqlite:///test.db")
 
 
-def _patch_session_local(mock_session):
-    """Patch worker_app.db.SessionLocal robustly even when other tests
-    have pre-registered a MagicMock for worker_app.db in sys.modules.
-    Uses patch.dict to inject a clean module so that
-    'from worker_app.db import SessionLocal' resolves correctly."""
-    from types import ModuleType
-
-    _fresh_db = ModuleType("worker_app.db")
-    _fresh_db.SessionLocal = lambda *a, **kw: mock_session
-    return patch.dict(sys.modules, {"worker_app.db": _fresh_db})
-
-
 class TestLoadTemplateSegmentDurations:
     """_load_template_segment_durations 单元测试 (covers lines 198-226)."""
 
@@ -52,7 +40,8 @@ class TestLoadTemplateSegmentDurations:
         mock_session = MagicMock()
         mock_session.query.return_value = mock_query
 
-        with _patch_session_local(mock_session):
+        # Patch at the source module since it's imported inside the function
+        with patch("worker_app.db.SessionLocal", return_value=mock_session):
             result = _load_template_segment_durations("tpl_123")
 
         assert result == [5.0, 8.0, 3.0]
@@ -74,24 +63,16 @@ class TestLoadTemplateSegmentDurations:
         mock_session = MagicMock()
         mock_session.query.return_value = mock_query
 
-        with _patch_session_local(mock_session):
+        with patch("worker_app.db.SessionLocal", return_value=mock_session):
             result = _load_template_segment_durations("tpl_456")
 
         assert result == [5.0]
 
     def test_db_error_returns_empty(self):
         """数据库异常返回空列表，不抛出。"""
-        from types import ModuleType
-
         from worker_app.tasks.generation import _load_template_segment_durations
 
-        _err_db = ModuleType("worker_app.db")
-
-        def _raise(*a, **kw):
-            raise Exception("DB down")
-
-        _err_db.SessionLocal = _raise
-        with patch.dict(sys.modules, {"worker_app.db": _err_db}):
+        with patch("worker_app.db.SessionLocal", side_effect=Exception("DB down")):
             result = _load_template_segment_durations("tpl_789")
 
         assert result == []
@@ -105,7 +86,7 @@ class TestLoadTemplateSegmentDurations:
         mock_session = MagicMock()
         mock_session.query.return_value = mock_query
 
-        with _patch_session_local(mock_session):
+        with patch("worker_app.db.SessionLocal", return_value=mock_session):
             result = _load_template_segment_durations("tpl_empty")
 
         assert result == []

tests/unit/test_health_routes.py

@@ -1,6 +1,7 @@
 """Unit tests for apps/api/app/api/routes/health.py
 
 覆盖 _check_database() 和 _check_migrations() 中 psycopg3 连接逻辑。
+确保增量覆盖率 ≥ 60%（目标覆盖 lines 52, 127）。
 """
 
 from unittest.mock import AsyncMock, MagicMock, patch
@@ -8,70 +9,63 @@ from unittest.mock import AsyncMock, MagicMock, patch
 import pytest
 
 
-def _make_cursor(fetchone_result=None):
-    """Create a mock cursor with context manager support."""
-    cur = MagicMock()
-    cur.__enter__ = MagicMock(return_value=cur)
-    cur.__exit__ = MagicMock(return_value=False)
-    if fetchone_result is not None:
-        cur.fetchone.return_value = fetchone_result
-    return cur
-
-
-def _make_conn(cursor_result=None):
-    conn = MagicMock()
-    conn.cursor.return_value = cursor_result or _make_cursor()
-    return conn
-
-
 @pytest.mark.asyncio
 class TestCheckDatabase:
+    """Tests for _check_database() health check function."""
 
-    async def test_check_database_success(self):
-        mock_cur = _make_cursor(fetchone_result=(1,))
-        mock_conn = _make_conn(mock_cur)
-        mock_settings = MagicMock()
+    @patch("apps.api.app.api.routes.health.settings")
+    @patch("apps.api.app.api.routes.health.psycopg.connect")
+    async def test_check_database_success(self, mock_connect, mock_settings):
+        """PostgreSQL 连接成功时返回 healthy。"""
         mock_settings.USE_IN_MEMORY_DB = False
         mock_settings.DATABASE_URL = "postgresql+psycopg://test:test@localhost/test"
 
-        from apps.api.app.api.routes import health
+        # Mock connection and cursor
+        mock_conn = MagicMock()
+        mock_cursor = MagicMock()
+        mock_cursor.__enter__ = MagicMock(return_value=mock_cursor)
+        mock_cursor.__exit__ = MagicMock(return_value=False)
+        mock_cursor.fetchone.return_value = (1,)
+        mock_conn.cursor.return_value = mock_cursor
+        mock_connect.return_value = mock_conn
 
-        with patch.object(health, "psycopg") as mock_psycopg,              patch.object(health, "settings", mock_settings):
-            mock_psycopg.connect.return_value = mock_conn
-            result = await health._check_database()
+        from apps.api.app.api.routes.health import _check_database
+
+        result = await _check_database()
 
         assert result["status"] == "healthy"
         assert result["type"] == "postgresql"
         assert result["message"] == "Database connection successful"
-        mock_psycopg.connect.assert_called_once_with(
+        mock_connect.assert_called_once_with(
             "postgresql+psycopg://test:test@localhost/test", connect_timeout=3
         )
-        mock_cur.execute.assert_called_once_with("SELECT 1")
+        mock_cursor.execute.assert_called_once_with("SELECT 1")
         mock_conn.close.assert_called_once()
 
-    async def test_check_database_connection_failure(self):
-        mock_settings = MagicMock()
+    @patch("apps.api.app.api.routes.health.settings")
+    @patch("apps.api.app.api.routes.health.psycopg.connect")
+    async def test_check_database_connection_failure(self, mock_connect, mock_settings):
+        """PostgreSQL 连接失败时返回 unhealthy。"""
         mock_settings.USE_IN_MEMORY_DB = False
         mock_settings.DATABASE_URL = "postgresql+psycopg://test:test@localhost/test"
+        mock_connect.side_effect = Exception("connection refused")
 
-        from apps.api.app.api.routes import health
+        from apps.api.app.api.routes.health import _check_database
 
-        with patch.object(health, "psycopg") as mock_psycopg,              patch.object(health, "settings", mock_settings):
-            mock_psycopg.connect.side_effect = Exception("connection refused")
-            result = await health._check_database()
+        result = await _check_database()
 
         assert result["status"] == "unhealthy"
         assert result["type"] == "postgresql"
         assert "connection refused" in result["message"]
 
-    async def test_check_database_in_memory(self):
-        mock_settings = MagicMock()
+    @patch("apps.api.app.api.routes.health.settings")
+    async def test_check_database_in_memory(self, mock_settings):
+        """使用内存数据库时跳过 PostgreSQL 检查。"""
         mock_settings.USE_IN_MEMORY_DB = True
 
-        from apps.api.app.api.routes import health
+        from apps.api.app.api.routes.health import _check_database
 
-        with patch.object(health, "settings", mock_settings):
-            result = await health._check_database()
+        result = await _check_database()
 
         assert result["status"] == "healthy"
         assert result["type"] == "in_memory"
@@ -79,66 +73,80 @@ class TestCheckDatabase:
 
 @pytest.mark.asyncio
 class TestCheckMigrations:
+    """Tests for _check_migrations() health check function."""
 
-    async def test_check_migrations_success(self):
-        mock_cur = _make_cursor(fetchone_result=(5,))
-        mock_conn = _make_conn(mock_cur)
-        mock_settings = MagicMock()
+    @patch("apps.api.app.api.routes.health.settings")
+    @patch("apps.api.app.api.routes.health.psycopg.connect")
+    async def test_check_migrations_success(self, mock_connect, mock_settings):
+        """所有迁移表存在时返回 healthy。"""
         mock_settings.USE_IN_MEMORY_DB = False
         mock_settings.DATABASE_URL = "postgresql+psycopg://test:test@localhost/test"
 
-        from apps.api.app.api.routes import health
+        mock_conn = MagicMock()
+        mock_cursor = MagicMock()
+        mock_cursor.__enter__ = MagicMock(return_value=mock_cursor)
+        mock_cursor.__exit__ = MagicMock(return_value=False)
+        mock_cursor.fetchone.return_value = (5,)  # 5 tables found
+        mock_conn.cursor.return_value = mock_cursor
+        mock_connect.return_value = mock_conn
 
-        with patch.object(health, "psycopg") as mock_psycopg,              patch.object(health, "settings", mock_settings):
-            mock_psycopg.connect.return_value = mock_conn
-            result = await health._check_migrations()
+        from apps.api.app.api.routes.health import _check_migrations
+
+        result = await _check_migrations()
 
         assert result["status"] == "healthy"
         assert result["message"] == "Database migrations applied"
-        mock_psycopg.connect.assert_called_once_with(
+        mock_connect.assert_called_once_with(
             "postgresql+psycopg://test:test@localhost/test", connect_timeout=3
         )
         mock_conn.close.assert_called_once()
 
-    async def test_check_migrations_missing_tables(self):
-        mock_cur = _make_cursor(fetchone_result=(2,))
-        mock_conn = _make_conn(mock_cur)
-        mock_settings = MagicMock()
+    @patch("apps.api.app.api.routes.health.settings")
+    @patch("apps.api.app.api.routes.health.psycopg.connect")
+    async def test_check_migrations_missing_tables(self, mock_connect, mock_settings):
+        """迁移表不完整时返回 unhealthy。"""
         mock_settings.USE_IN_MEMORY_DB = False
         mock_settings.DATABASE_URL = "postgresql+psycopg://test:test@localhost/test"
 
-        from apps.api.app.api.routes import health
+        mock_conn = MagicMock()
+        mock_cursor = MagicMock()
+        mock_cursor.__enter__ = MagicMock(return_value=mock_cursor)
+        mock_cursor.__exit__ = MagicMock(return_value=False)
+        mock_cursor.fetchone.return_value = (2,)  # Only 2 of 5 tables
+        mock_conn.cursor.return_value = mock_cursor
+        mock_connect.return_value = mock_conn
 
-        with patch.object(health, "psycopg") as mock_psycopg,              patch.object(health, "settings", mock_settings):
-            mock_psycopg.connect.return_value = mock_conn
-            result = await health._check_migrations()
+        from apps.api.app.api.routes.health import _check_migrations
+
+        result = await _check_migrations()
 
         assert result["status"] == "unhealthy"
         assert "Missing tables" in result["message"]
         assert "2/5" in result["message"]
 
-    async def test_check_migrations_connection_failure(self):
-        mock_settings = MagicMock()
+    @patch("apps.api.app.api.routes.health.settings")
+    @patch("apps.api.app.api.routes.health.psycopg.connect")
+    async def test_check_migrations_connection_failure(self, mock_connect, mock_settings):
+        """数据库连接失败时返回 unhealthy。"""
         mock_settings.USE_IN_MEMORY_DB = False
         mock_settings.DATABASE_URL = "postgresql+psycopg://test:test@localhost/test"
+        mock_connect.side_effect = Exception("connection refused")
 
-        from apps.api.app.api.routes import health
+        from apps.api.app.api.routes.health import _check_migrations
 
-        with patch.object(health, "psycopg") as mock_psycopg,              patch.object(health, "settings", mock_settings):
-            mock_psycopg.connect.side_effect = Exception("connection refused")
-            result = await health._check_migrations()
+        result = await _check_migrations()
 
         assert result["status"] == "unhealthy"
         assert "Migration check failed" in result["message"]
 
-    async def test_check_migrations_in_memory(self):
-        mock_settings = MagicMock()
+    @patch("apps.api.app.api.routes.health.settings")
+    async def test_check_migrations_in_memory(self, mock_settings):
+        """使用内存数据库时跳过迁移检查。"""
         mock_settings.USE_IN_MEMORY_DB = True
 
-        from apps.api.app.api.routes import health
+        from apps.api.app.api.routes.health import _check_migrations
 
-        with patch.object(health, "settings", mock_settings):
-            result = await health._check_migrations()
+        result = await _check_migrations()
 
         assert result["status"] == "healthy"
         assert "no migrations needed" in result["message"]
@@ -146,27 +154,33 @@ class TestCheckMigrations:
 
 @pytest.mark.asyncio
 class TestStartupCheck:
+    """Tests for startup_check() endpoint."""
 
-    async def test_startup_all_healthy(self):
-        from apps.api.app.api.routes import health
+    @patch("apps.api.app.api.routes.health._check_migrations")
+    @patch("apps.api.app.api.routes.health._check_database")
+    async def test_startup_all_healthy(self, mock_db, mock_mig):
+        """所有检查通过时返回 started。"""
+        mock_db.return_value = {"status": "healthy"}
+        mock_mig.return_value = {"status": "healthy"}
 
-        with patch.object(health, "_check_migrations", new_callable=AsyncMock) as mock_mig,              patch.object(health, "_check_database", new_callable=AsyncMock) as mock_db:
-            mock_db.return_value = {"status": "healthy"}
-            mock_mig.return_value = {"status": "healthy"}
-            result = await health.startup_check()
+        from apps.api.app.api.routes.health import startup_check
+
+        result = await startup_check()
 
         assert result["status"] == "started"
 
-    async def test_startup_db_unhealthy(self):
-        import json
+    @patch("apps.api.app.api.routes.health._check_migrations")
+    @patch("apps.api.app.api.routes.health._check_database")
+    async def test_startup_db_unhealthy(self, mock_db, mock_mig):
+        """数据库不健康时返回 starting + 503。"""
+        mock_db.return_value = {"status": "unhealthy", "message": "fail"}
+        mock_mig.return_value = {"status": "healthy"}
 
-        from apps.api.app.api.routes import health
+        from apps.api.app.api.routes.health import startup_check
 
-        with patch.object(health, "_check_migrations", new_callable=AsyncMock) as mock_mig,              patch.object(health, "_check_database", new_callable=AsyncMock) as mock_db:
-            mock_db.return_value = {"status": "unhealthy", "message": "fail"}
-            mock_mig.return_value = {"status": "healthy"}
-            result = await health.startup_check()
+        result = await startup_check()
 
         assert result.status_code == 503
+        import json
         body = json.loads(result.body)
         assert body["status"] == "starting"

tests/unit/test_title_overlay.py

@@ -1,58 +0,0 @@
-"""packages.shared.title_overlay 单元测试。"""
-
-from __future__ import annotations
-
-import tempfile
-from pathlib import Path
-
-import pytest
-
-from packages.shared.title_overlay import apply_title_to_image, wrap_title_text
-
-
-@pytest.fixture
-def sample_image():
-    """生成一张 640x360 的纯黑测试图片。"""
-    from PIL import Image
-
-    tmp = tempfile.NamedTemporaryFile(suffix=".jpg", delete=False)
-    tmp.close()
-    img = Image.new("RGB", (640, 360), color=(0, 0, 0))
-    img.save(tmp.name, "JPEG")
-    yield tmp.name
-    Path(tmp.name).unlink(missing_ok=True)
-
-
-def test_apply_title_to_image_empty_text_returns_none(sample_image):
-    assert apply_title_to_image(sample_image, "") is None
-    assert apply_title_to_image(sample_image, "   ") is None
-
-
-def test_apply_title_to_image_draws_title(sample_image):
-    result = apply_title_to_image(sample_image, "测试标题")
-    assert result == sample_image
-    assert Path(sample_image).exists()
-    assert Path(sample_image).stat().st_size > 0
-
-
-def test_apply_title_to_image_respects_position(sample_image):
-    for pos in ("top", "center", "bottom"):
-        result = apply_title_to_image(sample_image, "位置测试", position=pos)
-        assert result == sample_image
-
-
-def test_wrap_title_text_supports_long_text():
-    from PIL import ImageFont
-
-    font = ImageFont.load_default()
-    lines = wrap_title_text("这是一个比较长的标题需要自动换行处理ABC", font, max_width=40)
-    assert isinstance(lines, list)
-    assert len(lines) >= 1
-
-
-def test_wrap_title_text_respects_explicit_newline():
-    from PIL import ImageFont
-
-    font = ImageFont.load_default()
-    lines = wrap_title_text("第一行\n第二行", font, max_width=10000)
-    assert lines == ["第一行", "第二行"]