diff --git a/apps/api/app/api/routes/upload.py b/apps/api/app/api/routes/upload.py
index 279888a78..08aed4e7b 100644
--- a/apps/api/app/api/routes/upload.py
+++ b/apps/api/app/api/routes/upload.py
@@ -108,9 +108,8 @@ def _infer_mime_type_from_storage_key(storage_key: str) -> str:
     return "video/mp4"  # default
 
 
-# 兜底去重：无 file_hash / client_upload_id 时，同库同名近期活动记录视为重复
+# 兜底去重：无 file_hash / client_upload_id 且大小已知时，同库同名同大小近期活动记录视为重复
 FALLBACK_DEDUP_WINDOW_MINUTES = 30
-ACTIVE_ASSET_STATUSES = (AssetStatus.UPLOADING, AssetStatus.PROCESSING)
 
 
 def _find_duplicate_asset(
@@ -126,8 +125,12 @@ def _find_duplicate_asset(
 
     1. client_upload_id（客户端幂等 token，同一次上传的重试保持一致）
     2. file_hash（内容哈希，不同上传只要内容相同即去重）
-    3. 兜底：同库 + 同文件名（+同大小）且 30 分钟内仍处 uploading/processing
-       的记录——旧客户端不传 hash/token 时，防止 complete 超时重试反复建占位。
+    3. 兜底（严格模式，宁可漏判不可误杀）：file_hash 与 client_upload_id
+       均缺失、且 file_size > 0 时，同库 + 同文件名 + **同大小** 且 30 分钟内
+       仍处 uploading/processing 的记录才判重。
+       - file_hash 非空时跳过兜底（hash 已代表内容；同名但内容全新的视频
+         如 iPhone 的 IMG_xxxx.MOV 绝不能被同名占位误杀）
+       - file_size=0（未知）时不允许仅凭同名 + processing 判重，直接放行
 
     全部为鸭子类型调用：旧仓储无对应方法时静默跳过，不破坏既有实现。
     """
@@ -156,53 +159,35 @@ def _find_duplicate_asset(
                 existing.id,
             )
             return existing
-    if filename:
+    # 同名兜底去重（最后防线，严格模式）：
+    # - 仅当 file_hash / client_upload_id 均缺失时启用（hash 能代表内容时不靠同名猜）
+    # - file_size 必须 > 0 且与记录大小严格一致；大小未知（0）直接放行
+    # - 只命中近期 UPLOADING/PROCESSING 活动记录（READY 历史素材不拦）
+    if filename and not file_hash and not client_upload_id and file_size and file_size > 0:
         find_recent = getattr(asset_repository, "find_recent_active_by_library_and_name", None)
         if callable(find_recent):
             existing = find_recent(
                 library_id=library_id,
                 name=filename,
                 within_minutes=FALLBACK_DEDUP_WINDOW_MINUTES,
-                file_size=file_size or 0,
+                file_size=file_size,
             )
-            # 兜底去重：按状态区分处理
-            # - READY/ERROR：稳定素材，总命中（避免重复创建）
-            # - PROCESSING/UPLOADING：预建或 complete 占位，仅当 hash 一致才命中
-            #   - 占位无 hash（旧客户端 complete 建的）→ 命中
-            #   - 占位有 hash 且与当前请求 hash 一致 → 命中
-            #   - 占位有 hash 且与当前请求 hash 不同 → 跳过（内容不同）
             if existing is not None:
-                status = getattr(existing, "status", None)
-                existing_hash = getattr(existing, "file_hash", "") or ""
-                if status in (AssetStatus.READY, AssetStatus.ERROR):
-                    logger.info(
-                        "素材幂等兜底命中(近期同名稳定记录): library=%s name=%s asset=%s status=%s",
-                        library_id,
-                        filename,
-                        getattr(existing, "id", "?"),
-                        status,
-                    )
-                    return existing
-                elif status in ACTIVE_ASSET_STATUSES:
-                    if existing_hash and file_hash and existing_hash != file_hash:
-                        logger.debug(
-                            "素材兜底去重跳过(占位 hash 不同): library=%s name=%s asset=%s hash=%s req_hash=%s",
-                            library_id,
-                            filename,
-                            getattr(existing, "id", "?"),
-                            existing_hash,
-                            file_hash,
-                        )
-                        existing = None
-                    else:
-                        logger.info(
-                            "素材幂等兜底命中(近期同名活动记录): library=%s name=%s asset=%s status=%s",
-                            library_id,
-                            filename,
-                            getattr(existing, "id", "?"),
-                            status,
-                        )
-                        return existing
+                logger.info(
+                    "素材幂等兜底命中(近期同名同大小活动记录): library=%s name=%s asset=%s status=%s size=%s",
+                    library_id,
+                    filename,
+                    getattr(existing, "id", "?"),
+                    getattr(existing, "status", None),
+                    file_size,
+                )
+                return existing
+    elif filename and not file_hash and not client_upload_id and not file_size:
+        logger.debug(
+            "同名兜底去重跳过(file_size 未知，宁可放行不可误杀): library=%s name=%s",
+            library_id,
+            filename,
+        )
     return None
 
 
@@ -487,6 +472,7 @@ async def complete_direct_upload(
         user_id=authenticated_user.user.id,
         file_hash=request.file_hash,
         client_upload_id=request.client_upload_id,
+        file_size=request.file_size,
     )
 
     job = _submit_ingest_job(
diff --git a/apps/worker/worker_app/celery_app.py b/apps/worker/worker_app/celery_app.py
index 75477f583..34d40ad09 100755
--- a/apps/worker/worker_app/celery_app.py
+++ b/apps/worker/worker_app/celery_app.py
@@ -17,6 +17,12 @@ apply_queue_settings(celery_app)
 # 长渲染任务预取 1，避免任务被预取占住导致调度不均
 celery_app.conf.worker_prefetch_multiplier = GENERATION_WORKER_PREFETCH_MULTIPLIER
 celery_app.conf.task_acks_late = True  # worker 崩溃时未完成任务重回队列，由执行前守卫丢弃作废消息
+# worker 进程被 OOM/容器硬杀时拒绝 ack，消息留在队列由其他 worker 接手
+celery_app.conf.task_reject_on_worker_lost = True
+# Redis broker 消息可见性超时（#1714）：acks_late 下，消息被预取后 visibility_timeout
+# 内未 ack 才会重投。长任务（ingest HEVC 转码 20-30 分钟、生成硬超时 11 分钟）
+# 必须远大于最长执行时间，否则正常任务会在执行中被误重投；4 小时覆盖最长转码 + 余量。
+celery_app.conf.broker_transport_options = {"visibility_timeout": 4 * 60 * 60}
 
 celery_app.conf.imports = (
     "worker_app.tasks.health",
@@ -48,4 +54,11 @@ celery_app.conf.beat_schedule = {
         "schedule": 300.0,  # 每 5 分钟（秒）
         "options": {"expires": 240},
     },
+    # 上传/转码链路孤儿巡检：worker 重启丢 prefetch 消息后，卡 pending/processing
+    # 的 ingest_job + asset 占位超时标终态（#1714）。转码任务较长，10 分钟一轮
+    "cleanup-stale-ingest-jobs": {
+        "task": "worker.cleanup_stale_ingest_jobs",
+        "schedule": 600.0,  # 每 10 分钟（秒）
+        "options": {"expires": 540},
+    },
 }
diff --git a/apps/worker/worker_app/tasks/_startup.py b/apps/worker/worker_app/tasks/_startup.py
index 2d3f80b7c..afe329704 100644
--- a/apps/worker/worker_app/tasks/_startup.py
+++ b/apps/worker/worker_app/tasks/_startup.py
@@ -257,3 +257,32 @@ def _on_worker_ready(sender, **kwargs):  # pragma: no cover
     result = cleanup_all_stale_tasks()
     total = result["generation_tasks"] + result["jobs"]
     logger.info("Worker 启动清理完成，共清理 %d 个孤儿任务", total)
+
+
+@worker_ready.connect
+def _recover_stuck_ingest_jobs_on_ready(sender, **kwargs):  # pragma: no cover
+    """Worker 启动完成后恢复卡死在 processing 的 ingest_job（#1714）。
+
+    容器重启/进程 OOM 导致 transcode 队列 unacked 消息未重投时，processing
+    ingest_job 会永久卡死。启动时扫描 processing 超 10 分钟的 job，CAS 重置
+    pending 并重新派单；Redis 锁保证同容器 generation/transcode 双 worker
+    只有一个执行恢复。旧消息若后来重投，ingest_asset 执行前守卫会丢弃。
+    """
+    try:
+        from packages.application.ingest_orphan_cleanup import (
+            make_redis_recovery_lock,
+            recover_stuck_ingest_jobs_on_startup,
+        )
+
+        session = SessionLocal()
+        try:
+            recovered = recover_stuck_ingest_jobs_on_startup(
+                session,
+                lock_acquire=make_redis_recovery_lock(),
+                stuck_minutes=10,
+            )
+        finally:
+            session.close()
+        logger.info("Worker 启动 ingest 恢复完成，共重新派单 %d 个卡死任务", recovered)
+    except Exception as e:  # noqa: BLE001 — 启动恢复失败不能阻断 worker 起服
+        logger.error("启动 ingest 恢复扫描失败（beat 巡检仍会兜底标 failed）: %s", e, exc_info=True)
diff --git a/apps/worker/worker_app/tasks/cleanup.py b/apps/worker/worker_app/tasks/cleanup.py
index 07a7de8dc..ff29840dc 100644
--- a/apps/worker/worker_app/tasks/cleanup.py
+++ b/apps/worker/worker_app/tasks/cleanup.py
@@ -16,6 +16,12 @@ from worker_app.tasks._startup import (
     cleanup_stale_pending_tasks,
 )
 
+from packages.application.ingest_orphan_cleanup import (
+    ASSET_ORPHAN_TIMEOUT_MINUTES,
+    INGEST_PENDING_TIMEOUT_MINUTES,
+    INGEST_PROCESSING_TIMEOUT_MINUTES,
+)
+
 logger = logging.getLogger(__name__)
 
 
@@ -69,3 +75,53 @@ def scheduled_cleanup_stale_running(timeout_minutes: int = ORPHAN_TASK_TIMEOUT_M
             timeout_minutes,
         )
     return {"generation_tasks": gen_count, "jobs": job_count}
+
+
+@shared_task(name="worker.cleanup_stale_ingest_jobs")
+def scheduled_cleanup_stale_ingest_jobs(
+    processing_timeout_minutes: int = INGEST_PROCESSING_TIMEOUT_MINUTES,
+    pending_timeout_minutes: int = INGEST_PENDING_TIMEOUT_MINUTES,
+    orphan_asset_timeout_minutes: int = ASSET_ORPHAN_TIMEOUT_MINUTES,
+) -> dict:
+    """Celery Beat 调度：清理上传/转码链路（IngestJob + Asset）孤儿记录。
+
+    每 10 分钟执行一次。worker 容器重启/进程 OOM 时，已 prefetch 的 transcode
+    celery 消息会丢失（队列里也不存在），ingest_job 永久卡 pending/processing、
+    asset 永久卡 processing/uploading，没有兜底永远不会恢复（#1714）。
+
+    - ingest_job processing > processing_timeout_minutes / pending > pending_timeout_minutes
+      → 标 failed；关联 asset 占位（processing/uploading）联动标 error
+    - 无 ingest_job 关联、created_at > orphan_asset_timeout_minutes 的占位 asset
+      → 标 error
+    - 作废 celery 消息 revoke + 物理清除（防重投，执行前守卫是第二道防线）
+    """
+    from worker_app.db import SessionLocal
+
+    from packages.application.ingest_orphan_cleanup import (
+        cleanup_orphan_processing_assets,
+        cleanup_stale_ingest_jobs,
+        revoke_stale_ingest_messages,
+    )
+
+    session = SessionLocal()
+    try:
+        job_items, asset_ids = cleanup_stale_ingest_jobs(
+            session,
+            processing_timeout_minutes=processing_timeout_minutes,
+            pending_timeout_minutes=pending_timeout_minutes,
+        )
+        orphan_asset_ids = cleanup_orphan_processing_assets(session, timeout_minutes=orphan_asset_timeout_minutes)
+    finally:
+        session.close()
+
+    purged = revoke_stale_ingest_messages(job_items) if job_items else 0
+    total_jobs = len(job_items)
+    total_assets = len(set(asset_ids) | set(orphan_asset_ids))
+    if total_jobs or total_assets:
+        logger.warning(
+            "[Beat] 清理 ingest 链路孤儿: stale_jobs=%d, assets→error=%d, 队列清除消息=%d",
+            total_jobs,
+            total_assets,
+            purged,
+        )
+    return {"stale_jobs": total_jobs, "assets_to_error": total_assets, "purged_messages": purged}
diff --git a/packages/adapters/sqlalchemy_impl/asset_repository.py b/packages/adapters/sqlalchemy_impl/asset_repository.py
index ba334d498..fad219727 100755
--- a/packages/adapters/sqlalchemy_impl/asset_repository.py
+++ b/packages/adapters/sqlalchemy_impl/asset_repository.py
@@ -488,20 +488,25 @@ class SQLAlchemyAssetRepository:
 
         用于旧客户端未传 file_hash/client_upload_id 时，防止 complete 超时重试
         反复创建 PROCESSING 占位记录。只命中"活动中"的近期记录，READY 历史素材不拦。
+
+        严格模式（#1714 误杀修复）：file_size 必须 > 0 且与记录大小严格一致；
+        file_size=0（大小未知）时直接返回 None——宁可漏判（极端情况下多建一条
+        占位）也不可仅凭同名 + processing 误杀内容全新的视频。
         """
         from datetime import datetime, timedelta, timezone
 
         if not name:
             return None
+        if not file_size or file_size <= 0:
+            return None
         cutoff = datetime.now(timezone.utc) - timedelta(minutes=within_minutes)
         query = self.session.query(AssetModel).filter(
             AssetModel.asset_library_id == library_id,
             AssetModel.name == name,
             AssetModel.status.in_([AssetStatus.UPLOADING.value, AssetStatus.PROCESSING.value]),
             AssetModel.created_at >= cutoff,
+            AssetModel.file_size == file_size,
         )
-        if file_size and file_size > 0:
-            query = query.filter(AssetModel.file_size == file_size)
         model = query.order_by(AssetModel.created_at.desc()).first()
         if model is None:
             return None
diff --git a/packages/application/ingest_orphan_cleanup.py b/packages/application/ingest_orphan_cleanup.py
new file mode 100644
index 000000000..22fbb09a4
--- /dev/null
+++ b/packages/application/ingest_orphan_cleanup.py
@@ -0,0 +1,310 @@
+"""上传/转码链路（IngestJob + Asset）孤儿清理核心逻辑。
+
+#1714：generation 链路有 cleanup_stale_running/pending 兜底，但上传链路
+（ingest_jobs + assets）没有。worker 容器重启/进程 OOM 时，已 prefetch 的
+celery 消息会丢失（transcode 队列 worker_prefetch_multiplier=1，消息预取后
+宕机即丢失，Redis 队列里也不再存在），导致：
+
+- ingest_jobs.status 永久卡 pending/processing
+- assets.status 永久卡 processing/uploading（complete 阶段预建的占位）
+
+本模块提供纯核心（session 注入，便于单测）：超时阈值内无更新的记录
+批量标终态（job→failed、asset→error），并返回 (job_id, celery_task_id)
+列表供调用方 revoke + purge 残留队列消息。
+"""
+
+from __future__ import annotations
+
+import logging
+from datetime import datetime, timedelta, timezone
+from typing import Any, Callable
+
+logger = logging.getLogger(__name__)
+
+# ingest_job PROCESSING 超时阈值：ingest 任务包含下载 + ffprobe + HEVC 转码
+# （1GB 视频约 10-20 分钟）+ 回传 OSS，正常任务可能跑 20-30 分钟；
+# 60 分钟阈值覆盖大文件转码 + 抖动，绝不误杀正常任务。
+INGEST_PROCESSING_TIMEOUT_MINUTES = 60
+
+# ingest_job PENDING 超时阈值：transcode 队列 concurrency=1，队列积压时
+# 正常排队可能较久；90 分钟覆盖 worker 短暂停消费 + 排队。
+INGEST_PENDING_TIMEOUT_MINUTES = 90
+
+# Asset 占位超时阈值：无关联 ingest_job 的孤儿占位（complete 预建后派单失败等），
+# 阈值放宽到 120 分钟，避免与 ingest_job 生命周期错杀。
+ASSET_ORPHAN_TIMEOUT_MINUTES = 120
+
+_TERMINAL_JOB_STATUSES = ("failed", "completed")
+_TERMINAL_ASSET_STATUSES = ("ready", "error", "deleted")
+
+
+def _now() -> datetime:
+    return datetime.now(timezone.utc)
+
+
+def cleanup_stale_ingest_jobs(
+    session: Any,
+    *,
+    processing_timeout_minutes: int = INGEST_PROCESSING_TIMEOUT_MINUTES,
+    pending_timeout_minutes: int = INGEST_PENDING_TIMEOUT_MINUTES,
+    commit: bool = True,
+) -> tuple[list[tuple[str, str]], list[str]]:
+    """清理超时卡 pending/processing 的 ingest_jobs，并联动关联 asset。
+
+    Args:
+        session: SQLAlchemy session（或提供 query/commit 的鸭子类型）
+        processing_timeout_minutes: processing 状态超时阈值
+        pending_timeout_minutes: pending 状态超时阈值
+        commit: 是否提交事务
+
+    Returns:
+        (job_items, asset_ids)
+        - job_items: [(job_id, celery_task_id), ...] 供 revoke/purge
+        - asset_ids: 被联动标记为 error 的 asset id 列表
+    """
+    from packages.adapters.sqlalchemy_impl.models import AssetModel, IngestJobModel
+
+    now = _now()
+    processing_cutoff = now - timedelta(minutes=processing_timeout_minutes)
+    pending_cutoff = now - timedelta(minutes=pending_timeout_minutes)
+
+    stale_jobs = (
+        session.query(IngestJobModel)
+        .filter(
+            IngestJobModel.status.in_(["pending", "processing"]),
+            (
+                (IngestJobModel.status == "processing") & (IngestJobModel.updated_at < processing_cutoff)
+                | (IngestJobModel.status == "pending") & (IngestJobModel.created_at < pending_cutoff)
+            ),
+        )
+        .all()
+    )
+
+    job_items: list[tuple[str, str]] = []
+    asset_ids: list[str] = []
+    stale_asset_models: list[Any] = []
+    for job_model in stale_jobs:
+        ref_time = job_model.updated_at or job_model.created_at
+        if ref_time.tzinfo is None:  # SQLite 读回 naive datetime 的防御
+            ref_time = ref_time.replace(tzinfo=timezone.utc)
+        stale_minutes = int((now - ref_time).total_seconds() // 60)
+        job_model.status = "failed"
+        job_model.error_message = (
+            f"转码任务执行中断（超过超时阈值未更新，疑似 worker 重启/进程退出，已卡死 {stale_minutes} 分钟）"
+        )
+        job_model.updated_at = now
+        job_items.append((job_model.id, getattr(job_model, "celery_task_id", "") or ""))
+        if job_model.asset_id:
+            asset_ids.append(job_model.asset_id)
+
+    if asset_ids:
+        stale_asset_models = (
+            session.query(AssetModel)
+            .filter(
+                AssetModel.id.in_(asset_ids),
+                AssetModel.status.in_(["processing", "uploading"]),
+            )
+            .all()
+        )
+        for asset_model in stale_asset_models:
+            asset_model.status = "error"
+            asset_model.updated_at = now
+
+    if commit and (job_items or stale_asset_models):
+        session.commit()
+
+    if job_items:
+        logger.warning(
+            "[ingest-cleanup] 清理 %d 个超时 ingest_job（processing>%dm / pending>%dm），联动 %d 个 asset 标 error",
+            len(job_items),
+            processing_timeout_minutes,
+            pending_timeout_minutes,
+            len(stale_asset_models),
+        )
+    return job_items, [a.id for a in stale_asset_models]
+
+
+def cleanup_orphan_processing_assets(
+    session: Any,
+    *,
+    timeout_minutes: int = ASSET_ORPHAN_TIMEOUT_MINUTES,
+    commit: bool = True,
+) -> list[str]:
+    """清理无 ingest_job 关联、超时卡 processing/uploading 的孤儿 asset 占位。
+
+    complete 阶段预建 asset 后若派单失败（或 direct 上传 complete 后
+    未触发 ingest），占位会永久卡住。这类 asset 没有对应 ingest_job，
+    只能按 created_at 超时兜底标 error。
+    """
+    from packages.adapters.sqlalchemy_impl.models import AssetModel, IngestJobModel
+
+    cutoff = _now() - timedelta(minutes=timeout_minutes)
+    orphan_assets = (
+        session.query(AssetModel)
+        .outerjoin(IngestJobModel, IngestJobModel.asset_id == AssetModel.id)
+        .filter(
+            AssetModel.status.in_(["processing", "uploading"]),
+            AssetModel.created_at < cutoff,
+            IngestJobModel.id.is_(None),
+        )
+        .all()
+    )
+    for asset_model in orphan_assets:
+        asset_model.status = "error"
+        asset_model.updated_at = _now()
+    if commit and orphan_assets:
+        session.commit()
+        logger.warning("[ingest-cleanup] 清理 %d 个无 job 关联的超时孤儿 asset 占位", len(orphan_assets))
+    return [a.id for a in orphan_assets]
+
+
+def revoke_stale_ingest_messages(
+    job_items: list[tuple[str, str]],
+    *,
+    celery_app_factory: Callable[[], Any] | None = None,
+    broker_url_factory: Callable[[], str] | None = None,
+) -> int:
+    """revoke + 物理清理 ingest 作废消息（transcode/celery 队列）。
+
+    消息可能已在 worker 宕机时丢失（队列里查不到），那也无害；
+    若消息还在（极端重复投递），物理清除防止重投执行。
+    失败不阻断清理（ingest_asset 的执行前状态守卫是第二道防线）。
+    """
+    biz_ids = [jid for jid, _ in job_items if jid]
+    celery_ids = [cid for _, cid in job_items if cid]
+    if not biz_ids and not celery_ids:
+        return 0
+    try:
+        from packages.shared.celery_orphan_guard import revoke_and_purge
+
+        app = celery_app_factory() if celery_app_factory else None
+        broker_url = broker_url_factory() if broker_url_factory else ""
+        if app is None or not broker_url:
+            from worker_app.celery_app import celery_app as _app
+            from worker_app.core.config import get_settings
+
+            app = _app
+            broker_url = get_settings().broker_url
+        return revoke_and_purge(
+            app,
+            broker_url,
+            business_task_ids=biz_ids,
+            celery_task_ids=celery_ids,
+            queue_names=("transcode", "celery"),
+        )
+    except Exception as e:  # noqa: BLE001
+        logger.error("撤销作废 ingest 队列消息失败（执行前守卫仍会兜底）: %s", e, exc_info=True)
+        return 0
+
+
+# ── worker 启动恢复（#1714）──────────────────────────────────────────────
+#
+# task_acks_late=True 下，worker 崩溃/容器重启时未 ack 的消息理论上会在
+# visibility_timeout 到期后重新投递；但 prefork 进程异常、部署窗口跨
+# visibility 配置边界等场景仍可能留下卡在 processing 的 ingest_job
+# （staging 实证：03:16 派单、03:45 置 processing 后 worker 重启，
+# unacked 消息未重投，任务永久卡死）。启动时做一次显式恢复扫描兜底。
+#
+# 恢复策略：processing 超过 stuck_minutes（默认 10 分钟，部署中跨进程
+# 交接的正常窗口 < 10 分钟，不会误抢别的 worker 正在执行的任务）的 job，
+# CAS 重置为 pending 并重新 send_task；旧消息若后来重投，ingest_asset
+# 的执行前守卫会把状态不匹配的旧 celery 消息丢弃。
+
+
+def recover_stuck_ingest_jobs_on_startup(
+    session: Any,
+    *,
+    send_task: Callable[..., Any] | None = None,
+    update_celery_task_id: Callable[[str, str], None] | None = None,
+    lock_acquire: Callable[[], bool] | None = None,
+    stuck_minutes: int = 10,
+    commit: bool = True,
+) -> int:
+    """worker 启动时把卡在 processing 超时的 ingest_job 重新派单。
+
+    Args:
+        session: SQLAlchemy session
+        send_task: celery send_task 可调用（注入便于测试）；不传则用 worker celery_app
+        update_celery_task_id: 回写新 celery task id 的回调（job_id, new_task_id）
+        lock_acquire: 分布式锁获取回调（多 worker 进程同时启动时只允许一个恢复）；
+            返回 False 表示未抢到锁，本次跳过
+        stuck_minutes: processing 超过该分钟数视为卡死
+
+    Returns:
+        重新派单的 job 数
+    """
+    if lock_acquire is not None and not lock_acquire():
+        logger.info("[ingest-recover] 未抢到恢复锁，跳过（另一进程正在恢复）")
+        return 0
+
+    from packages.adapters.sqlalchemy_impl.models import IngestJobModel
+
+    cutoff = _now() - timedelta(minutes=stuck_minutes)
+    stuck_jobs = (
+        session.query(IngestJobModel)
+        .filter(IngestJobModel.status == "processing", IngestJobModel.updated_at < cutoff)
+        .order_by(IngestJobModel.updated_at.asc())
+        .all()
+    )
+
+    if not stuck_jobs:
+        logger.info("[ingest-recover] 无卡死 processing ingest_job 需要恢复")
+        return 0
+
+    if send_task is None:
+        from worker_app.celery_app import celery_app as _app
+
+        send_task = _app.send_task
+
+    recovered = 0
+    for job_model in stuck_jobs:
+        # CAS：只有仍是 processing 才重置（并发/旧消息已回写终态时不碰）
+        updated = (
+            session.query(IngestJobModel)
+            .filter(IngestJobModel.id == job_model.id, IngestJobModel.status == "processing")
+            .update({"status": "pending", "error_message": "", "updated_at": _now()})
+        )
+        if not updated:
+            continue
+        try:
+            result = send_task("worker.ingest_asset", args=[job_model.id])
+            new_task_id = getattr(result, "id", "") or ""
+        except Exception as e:  # noqa: BLE001
+            logger.error("[ingest-recover] 重新派单失败 job_id=%s: %s", job_model.id, e)
+            continue
+        if new_task_id:
+            job_model.celery_task_id = new_task_id
+            if update_celery_task_id is not None:
+                update_celery_task_id(job_model.id, new_task_id)
+        logger.warning(
+            "[ingest-recover] 卡死 ingest_job %s 已重置 pending 并重新派单 (new celery task=%s)",
+            job_model.id,
+            new_task_id,
+        )
+        recovered += 1
+
+    if commit and recovered:
+        session.commit()
+    logger.warning("[ingest-recover] 启动恢复完成，共重新派单 %d 个卡死 ingest_job", recovered)
+    return recovered
+
+
+def make_redis_recovery_lock(lock_key: str = "ingest:recover:startup", ttl_seconds: int = 300):
+    """构造基于 Redis SET NX 的恢复锁工厂（多 worker 进程互斥）。
+
+    返回一个无参 callable，调用时尝试抢锁：抢到返回 True，未抢到返回 False。
+    Redis 不可用时不阻断启动恢复（返回 True，恢复逻辑自身有 CAS 幂等保护）。
+    """
+
+    def _acquire() -> bool:
+        try:
+            import redis as redis_lib
+            from worker_app.core.config import get_settings
+
+            client = redis_lib.Redis.from_url(get_settings().broker_url)
+            return bool(client.set(lock_key, "1", nx=True, ex=ttl_seconds))
+        except Exception as e:  # noqa: BLE001
+            logger.warning("[ingest-recover] Redis 锁不可用，降级为无锁执行（CAS 兜底）: %s", e)
+            return True
+
+    return _acquire
diff --git a/tests/unit/test_asset_repo_fallback_dedup_1714.py b/tests/unit/test_asset_repo_fallback_dedup_1714.py
new file mode 100644
index 000000000..d68890773
--- /dev/null
+++ b/tests/unit/test_asset_repo_fallback_dedup_1714.py
@@ -0,0 +1,93 @@
+"""#1714 find_recent_active_by_library_and_name 严格模式测试。
+
+file_size=0（未知）时必须返回 None（宁可漏判不可误杀）；
+大小严格匹配；只命中近期 UPLOADING/PROCESSING 记录。
+"""
+
+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  # noqa: E402
+from sqlalchemy.orm import sessionmaker  # noqa: E402
+
+from packages.adapters.sqlalchemy_impl.asset_repository import SQLAlchemyAssetRepository  # noqa: E402
+from packages.adapters.sqlalchemy_impl.models import Base  # noqa: E402
+from packages.domain import Asset, AssetStatus  # noqa: E402
+
+
+def _repository():
+    engine = create_engine("sqlite:///:memory:")
+    Base.metadata.create_all(engine)
+    session = sessionmaker(bind=engine)()
+    return SQLAlchemyAssetRepository(session)
+
+
+def _mk_asset(name="IMG_2285.MOV", file_size=5_000_000, status=AssetStatus.PROCESSING, minutes_ago=5):
+    asset = Asset.create(
+        project_id="proj-1",
+        library_id="lib-1",
+        name=name,
+        storage_key=f"uploads/x/{name}",
+        mime_type="video/quicktime",
+        file_size=file_size,
+    )
+    asset.status = status
+    asset.created_at = datetime.now(timezone.utc) - timedelta(minutes=minutes_ago)
+    return asset
+
+
+def test_returns_none_when_file_size_zero():
+    """file_size=0（大小未知）直接返回 None——不许仅凭同名 + processing 判重。"""
+    repo = _repository()
+    repo.create(_mk_asset(file_size=0))
+
+    result = repo.find_recent_active_by_library_and_name(library_id="lib-1", name="IMG_2285.MOV", file_size=0)
+    assert result is None
+
+
+def test_matches_when_name_size_strict_equal():
+    """同名 + 同大小 + processing 近期记录 → 命中。"""
+    repo = _repository()
+    repo.create(_mk_asset(file_size=5_000_000))
+
+    result = repo.find_recent_active_by_library_and_name(library_id="lib-1", name="IMG_2285.MOV", file_size=5_000_000)
+    assert result is not None
+    assert result.name == "IMG_2285.MOV"
+
+
+def test_no_match_when_same_name_but_different_size():
+    """同名但大小不同 → 不命中（内容全新的视频不能误杀）。"""
+    repo = _repository()
+    repo.create(_mk_asset(file_size=5_000_000))
+
+    result = repo.find_recent_active_by_library_and_name(library_id="lib-1", name="IMG_2285.MOV", file_size=9_999_999)
+    assert result is None
+
+
+def test_no_match_ready_history_even_with_same_size():
+    """READY 历史同名素材不命中（允许再次上传同名文件）。"""
+    repo = _repository()
+    repo.create(_mk_asset(file_size=5_000_000, status=AssetStatus.READY))
+
+    result = repo.find_recent_active_by_library_and_name(library_id="lib-1", name="IMG_2285.MOV", file_size=5_000_000)
+    assert result is None
+
+
+def test_no_match_when_window_expired():
+    """超过 30 分钟窗口的活动记录不命中。"""
+    repo = _repository()
+    repo.create(_mk_asset(file_size=5_000_000, minutes_ago=45))
+
+    result = repo.find_recent_active_by_library_and_name(
+        library_id="lib-1", name="IMG_2285.MOV", within_minutes=30, file_size=5_000_000
+    )
+    assert result is None
+
+
+def test_returns_none_when_name_empty():
+    repo = _repository()
+    result = repo.find_recent_active_by_library_and_name(library_id="lib-1", name="", file_size=100)
+    assert result is None
diff --git a/tests/unit/test_cleanup_ingest_beat_1714.py b/tests/unit/test_cleanup_ingest_beat_1714.py
new file mode 100644
index 000000000..f7c5bf11d
--- /dev/null
+++ b/tests/unit/test_cleanup_ingest_beat_1714.py
@@ -0,0 +1,75 @@
+"""#1714 beat 任务 scheduled_cleanup_stale_ingest_jobs 薄封装测试。
+
+mock SessionLocal 和清理核心，验证 beat 任务正确串联
+cleanup_stale_ingest_jobs → cleanup_orphan_processing_assets → revoke 消息。
+"""
+
+from __future__ import annotations
+
+import os
+import sys
+from pathlib import Path
+from unittest.mock import MagicMock, patch
+
+os.environ.setdefault("JWT_SECRET_KEY", "unit-test-secret")
+os.environ.setdefault("DATABASE_URL", "sqlite:///test_beat.db")
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "apps" / "worker"))
+sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "apps" / "api"))
+sys.path.insert(0, str(Path(__file__).resolve().parents[2]))
+
+import worker_app.tasks.cleanup as cleanup  # noqa: E402
+
+
+def test_beat_cleanup_calls_core_and_revokes():
+    """beat 任务串联三个核心步骤，返回汇总计数。"""
+    fake_session = MagicMock()
+
+    with (
+        patch("worker_app.db.SessionLocal", return_value=fake_session) as m_db,
+        patch(
+            "packages.application.ingest_orphan_cleanup.cleanup_stale_ingest_jobs",
+            return_value=([("job-1", "cel-1"), ("job-2", "")], ["a-1"]),
+        ) as m_jobs,
+        patch(
+            "packages.application.ingest_orphan_cleanup.cleanup_orphan_processing_assets",
+            return_value=["a-2"],
+        ) as m_assets,
+        patch(
+            "packages.shared.celery_orphan_guard.revoke_and_purge",
+            return_value=1,
+        ) as m_revoke,
+    ):
+        result = cleanup.scheduled_cleanup_stale_ingest_jobs()
+
+    m_db.assert_called_once()
+    m_jobs.assert_called_once()
+    assert m_jobs.call_args.kwargs["processing_timeout_minutes"] == 60
+    m_assets.assert_called_once()
+    m_revoke.assert_called_once()
+    # 队列名只传 transcode/celery（不传 generation）
+    assert m_revoke.call_args.kwargs["queue_names"] == ("transcode", "celery")
+    fake_session.close.assert_called_once()
+    assert result == {"stale_jobs": 2, "assets_to_error": 2, "purged_messages": 1}
+
+
+def test_beat_cleanup_no_op_when_nothing_stale():
+    """无孤儿时不调 revoke，返回全 0。"""
+    fake_session = MagicMock()
+
+    with (
+        patch("worker_app.db.SessionLocal", return_value=fake_session),
+        patch(
+            "packages.application.ingest_orphan_cleanup.cleanup_stale_ingest_jobs",
+            return_value=([], []),
+        ),
+        patch(
+            "packages.application.ingest_orphan_cleanup.cleanup_orphan_processing_assets",
+            return_value=[],
+        ),
+        patch("packages.shared.celery_orphan_guard.revoke_and_purge") as m_revoke,
+    ):
+        result = cleanup.scheduled_cleanup_stale_ingest_jobs()
+
+    m_revoke.assert_not_called()
+    assert result == {"stale_jobs": 0, "assets_to_error": 0, "purged_messages": 0}
diff --git a/tests/unit/test_ingest_orphan_cleanup_1714.py b/tests/unit/test_ingest_orphan_cleanup_1714.py
new file mode 100644
index 000000000..cceccf8d4
--- /dev/null
+++ b/tests/unit/test_ingest_orphan_cleanup_1714.py
@@ -0,0 +1,262 @@
+"""#1714 上传/转码链路（IngestJob + Asset）孤儿清理测试。
+
+场景：worker 容器重启/进程 OOM 时，已 prefetch 的 transcode celery 消息丢失，
+ingest_job 永久卡 pending/processing、asset 永久卡 processing/uploading。
+"""
+
+from __future__ import annotations
+
+import os
+import sys
+from datetime import datetime, timedelta, timezone
+from pathlib import Path
+
+import pytest
+
+os.environ.setdefault("JWT_SECRET_KEY", "unit-test-secret")
+os.environ.setdefault("DATABASE_URL", "sqlite:///test_ingest_orphan.db")
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "apps" / "worker"))
+sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "apps" / "api"))
+sys.path.insert(0, str(Path(__file__).resolve().parents[2]))
+
+from sqlalchemy import create_engine  # noqa: E402
+from sqlalchemy.orm import sessionmaker  # noqa: E402
+
+from packages.adapters.sqlalchemy_impl.models import AssetModel, Base, IngestJobModel  # noqa: E402
+from packages.application.ingest_orphan_cleanup import (  # noqa: E402
+    cleanup_orphan_processing_assets,
+    cleanup_stale_ingest_jobs,
+)
+
+
+@pytest.fixture()
+def session():
+    engine = create_engine("sqlite:///:memory:")
+    Base.metadata.create_all(bind=engine)
+    Session = sessionmaker(bind=engine)
+    db = Session()
+    yield db
+    db.close()
+
+
+def _mk_job(session, *, status="processing", celery_task_id="cel-1", asset_id="a-1", minutes_ago=90):
+    now = datetime.now(timezone.utc)
+    job = IngestJobModel(
+        id=f"job-{minutes_ago}-{status}-{celery_task_id}",
+        project_id="p-1",
+        library_id="lib-1",
+        storage_key="uploads/x/IMG_2285.MOV",
+        status=status,
+        asset_id=asset_id,
+        celery_task_id=celery_task_id,
+        created_at=now - timedelta(minutes=minutes_ago),
+        updated_at=now - timedelta(minutes=minutes_ago),
+    )
+    session.add(job)
+    session.commit()
+    return job
+
+
+def _mk_asset(session, *, id="a-1", status="processing", minutes_ago=90, file_size=0):
+    now = datetime.now(timezone.utc)
+    asset = AssetModel(
+        id=id,
+        project_id="p-1",
+        asset_library_id="lib-1",
+        name="IMG_2285.MOV",
+        file_type="video",
+        file_size=file_size,
+        file_url="https://example.com/x.mov",
+        storage_key="uploads/x/IMG_2285.MOV",
+        status=status,
+        uploaded_by_user_id="u-1",
+        created_at=now - timedelta(minutes=minutes_ago),
+        updated_at=now - timedelta(minutes=minutes_ago),
+    )
+    session.add(asset)
+    session.commit()
+    return asset
+
+
+class TestCleanupStaleIngestJobs:
+    def test_stale_processing_job_marked_failed_and_asset_to_error(self, session):
+        """processing 超 60 分钟 → job failed，关联 processing asset → error。"""
+        _mk_asset(session, id="a-1", status="processing")
+        _mk_job(session, status="processing", celery_task_id="cel-dead", asset_id="a-1", minutes_ago=90)
+
+        items, asset_ids = cleanup_stale_ingest_jobs(session, processing_timeout_minutes=60, pending_timeout_minutes=90)
+
+        assert len(items) == 1
+        assert items[0] == ("job-90-processing-cel-dead", "cel-dead")
+        assert asset_ids == ["a-1"]
+        db_job = session.query(IngestJobModel).one()
+        assert db_job.status == "failed"
+        assert "中断" in db_job.error_message
+        db_asset = session.query(AssetModel).one()
+        assert db_asset.status == "error"
+
+    def test_stale_pending_job_marked_failed(self, session):
+        """pending 超 90 分钟（从未被消费）→ job failed。"""
+        _mk_asset(session, id="a-2", status="uploading")
+        _mk_job(session, status="pending", celery_task_id="", asset_id="a-2", minutes_ago=120)
+
+        items, asset_ids = cleanup_stale_ingest_jobs(session, processing_timeout_minutes=60, pending_timeout_minutes=90)
+
+        assert len(items) == 1
+        assert items[0][1] == ""  # 无 celery task id
+        assert session.query(IngestJobModel).one().status == "failed"
+        assert session.query(AssetModel).one().status == "error"
+
+    def test_recent_processing_job_not_touched(self, session):
+        """processing 仅 10 分钟（正常转码中）→ 不误杀。"""
+        _mk_asset(session, id="a-3", status="processing", minutes_ago=10)
+        _mk_job(session, status="processing", celery_task_id="cel-live", asset_id="a-3", minutes_ago=10)
+
+        items, asset_ids = cleanup_stale_ingest_jobs(session, processing_timeout_minutes=60, pending_timeout_minutes=90)
+
+        assert items == []
+        assert asset_ids == []
+        assert session.query(IngestJobModel).one().status == "processing"
+        assert session.query(AssetModel).one().status == "processing"
+
+    def test_recent_pending_job_not_touched(self, session):
+        """pending 仅 30 分钟（队列积压排队中）→ 不误杀。"""
+        _mk_job(session, status="pending", asset_id="", minutes_ago=30)
+
+        items, _ = cleanup_stale_ingest_jobs(session, processing_timeout_minutes=60, pending_timeout_minutes=90)
+
+        assert items == []
+        assert session.query(IngestJobModel).one().status == "pending"
+
+    def test_terminal_job_not_touched(self, session):
+        """已 completed/failed 的 job 不动。"""
+        _mk_job(session, status="completed", celery_task_id="", asset_id="", minutes_ago=999)
+        _mk_job(session, status="failed", celery_task_id="", asset_id="", minutes_ago=999)
+
+        items, _ = cleanup_stale_ingest_jobs(session)
+
+        assert items == []
+        statuses = sorted(j.status for j in session.query(IngestJobModel).all())
+        assert statuses == ["completed", "failed"]
+
+    def test_ready_asset_not_demoted(self, session):
+        """关联 asset 已是 ready（转码其实成功了，仅 job 回写失败）→ 不降级为 error。"""
+        _mk_asset(session, id="a-4", status="ready")
+        _mk_job(session, status="processing", celery_task_id="cel-x", asset_id="a-4", minutes_ago=90)
+
+        _, asset_ids = cleanup_stale_ingest_jobs(session)
+
+        assert asset_ids == []  # ready 不动
+        assert session.query(AssetModel).one().status == "ready"
+
+
+class TestCleanupOrphanProcessingAssets:
+    def test_orphan_asset_without_job_marked_error(self, session):
+        """无 ingest_job 关联、created 超 120 分钟的 processing 占位 → error。"""
+        _mk_asset(session, id="orphan-1", status="processing", minutes_ago=150)
+
+        ids = cleanup_orphan_processing_assets(session, timeout_minutes=120)
+
+        assert ids == ["orphan-1"]
+        assert session.query(AssetModel).one().status == "error"
+
+    def test_asset_with_active_job_not_touched(self, session):
+        """有 processing job 关联的 asset 不由本函数处理（归 cleanup_stale_ingest_jobs）。"""
+        _mk_asset(session, id="a-5", status="processing", minutes_ago=150)
+        _mk_job(session, status="processing", asset_id="a-5", minutes_ago=150)
+
+        ids = cleanup_orphan_processing_assets(session, timeout_minutes=120)
+
+        assert ids == []
+        assert session.query(AssetModel).one().status == "processing"
+
+    def test_recent_orphan_asset_not_touched(self, session):
+        """无 job 但才创建 30 分钟 → 可能 complete 刚建、job 派单中，不动。"""
+        _mk_asset(session, id="orphan-2", status="processing", minutes_ago=30)
+
+        ids = cleanup_orphan_processing_assets(session, timeout_minutes=120)
+
+        assert ids == []
+        assert session.query(AssetModel).one().status == "processing"
+
+
+class TestRecoverStuckIngestJobsOnStartup:
+    def test_stuck_processing_job_requeued(self, session):
+        """processing 超 10 分钟 → 重置 pending 并重新 send_task，回写新 celery id。"""
+        from types import SimpleNamespace
+
+        from packages.application.ingest_orphan_cleanup import recover_stuck_ingest_jobs_on_startup
+
+        job = _mk_job(session, status="processing", celery_task_id="old-cel-1", asset_id="a-1", minutes_ago=30)
+
+        sent = []
+
+        def fake_send_task(name, args=None, **kw):
+            sent.append((name, args))
+            return SimpleNamespace(id="new-cel-9")
+
+        updated_ids = []
+        recovered = recover_stuck_ingest_jobs_on_startup(
+            session,
+            send_task=fake_send_task,
+            update_celery_task_id=lambda jid, cid: updated_ids.append((jid, cid)),
+            stuck_minutes=10,
+        )
+
+        assert recovered == 1
+        assert sent == [("worker.ingest_asset", [job.id])]
+        refreshed = session.query(IngestJobModel).filter_by(id=job.id).one()
+        assert refreshed.status == "pending"
+        assert refreshed.celery_task_id == "new-cel-9"
+        assert updated_ids == [(job.id, "new-cel-9")]
+
+    def test_recent_processing_job_not_touched(self, session):
+        """processing 仅 5 分钟（正常转码中/部署交接窗口）→ 不抢。"""
+        from packages.application.ingest_orphan_cleanup import recover_stuck_ingest_jobs_on_startup
+
+        _mk_job(session, status="processing", celery_task_id="live", asset_id="", minutes_ago=5)
+
+        sent = []
+        recovered = recover_stuck_ingest_jobs_on_startup(
+            session,
+            send_task=lambda *a, **k: sent.append(a),
+            stuck_minutes=10,
+        )
+
+        assert recovered == 0
+        assert sent == []
+        assert session.query(IngestJobModel).one().status == "processing"
+
+    def test_lock_not_acquired_skips(self, session):
+        """未抢到分布式锁（另一 worker 正在恢复）→ 跳过。"""
+        from packages.application.ingest_orphan_cleanup import recover_stuck_ingest_jobs_on_startup
+
+        _mk_job(session, status="processing", celery_task_id="x", asset_id="", minutes_ago=30)
+
+        recovered = recover_stuck_ingest_jobs_on_startup(
+            session,
+            send_task=lambda *a, **k: None,
+            lock_acquire=lambda: False,
+            stuck_minutes=10,
+        )
+
+        assert recovered == 0
+        assert session.query(IngestJobModel).one().status == "processing"
+
+    def test_pending_and_terminal_not_requeued(self, session):
+        """pending/已终态 job 不在恢复范围。"""
+        from packages.application.ingest_orphan_cleanup import recover_stuck_ingest_jobs_on_startup
+
+        _mk_job(session, status="pending", celery_task_id="", asset_id="", minutes_ago=60)
+        _mk_job(session, status="failed", celery_task_id="", asset_id="", minutes_ago=60)
+
+        recovered = recover_stuck_ingest_jobs_on_startup(
+            session,
+            send_task=lambda *a, **k: None,
+            stuck_minutes=10,
+        )
+
+        assert recovered == 0
+        statuses = sorted(j.status for j in session.query(IngestJobModel).all())
+        assert statuses == ["failed", "pending"]
diff --git a/tests/unit/test_upload_complete_idempotency_1714.py b/tests/unit/test_upload_complete_idempotency_1714.py
index 1effb6e78..c0436b065 100644
--- a/tests/unit/test_upload_complete_idempotency_1714.py
+++ b/tests/unit/test_upload_complete_idempotency_1714.py
@@ -73,6 +73,9 @@ class StubAssetRepository:
     def find_recent_active_by_library_and_name(
         self, library_id: str, name: str, within_minutes: int = 30, file_size: int = 0
     ) -> Asset | None:
+        # 严格模式（#1714）：大小未知（0）直接不命中，宁可漏判不可误杀
+        if not file_size or file_size <= 0:
+            return None
         cutoff = datetime.now(timezone.utc) - timedelta(minutes=within_minutes)
         candidates = [
             a
@@ -81,7 +84,7 @@ class StubAssetRepository:
             and a.name == name
             and a.status in (AssetStatus.UPLOADING, AssetStatus.PROCESSING)
             and a.created_at >= cutoff
-            and (not file_size or a.file_size == file_size)
+            and a.file_size == file_size
         ]
         return max(candidates, key=lambda a: a.created_at) if candidates else None
 
@@ -234,14 +237,21 @@ class TestDirectCompleteIdempotency:
         不应再建第二条。
         """
         client, asset_repo, ingest_repo, _ = _client()
-        # 第一次 complete（旧客户端无 token/hash）
-        r1 = client.post("/api/v1/direct/complete", json=COMPLETE_BODY)
+        # 第一次 complete（旧客户端无 token/hash，但 file_size 可知）
+        r1 = client.post(
+            "/api/v1/direct/complete",
+            json={**COMPLETE_BODY, "file_size": 5_000_000},
+        )
         assert r1.json()["duplicated"] is False
         # 重试：重新 prepare 产生新 storage_key（仅 uuid 目录不同，文件名一致——
-        # 前端重试传的是同一个 File），且近期
+        # 前端重试传的是同一个 File），且近期；同大小才允许兜底命中
         r2 = client.post(
             "/api/v1/direct/complete",
-            json={**COMPLETE_BODY, "storage_key": "uploads/retry/IMG_2282.MOV", "file_size": 0},
+            json={
+                **COMPLETE_BODY,
+                "storage_key": "uploads/retry/IMG_2282.MOV",
+                "file_size": 5_000_000,
+            },
         )
         assert r2.status_code == 200
         assert r2.json()["duplicated"] is True
@@ -249,6 +259,80 @@ class TestDirectCompleteIdempotency:
         assert len(asset_repo.created) == 1
         assert ingest_repo.created_count == 1
 
+    def test_fallback_dedup_skipped_when_file_size_unknown(self):
+        """file_size=0（未知）时不允许仅凭同名 + processing 判重，直接放行（#1714）。
+
+        根因场景：complete 没传 file_size，30 分钟内同名占位（如 iPhone 的
+        IMG_2285.MOV）会把内容/大小全新的视频误判为重复跳过。
+        """
+        client, asset_repo, _ingest_repo, _ = _client()
+        r1 = client.post(
+            "/api/v1/direct/complete",
+            json={**COMPLETE_BODY, "file_size": 0},
+        )
+        assert r1.json()["duplicated"] is False
+        # 第二个全新视频：同名（IMG_2285.MOV）、无 hash/token、file_size 仍未知
+        r2 = client.post(
+            "/api/v1/direct/complete",
+            json={**COMPLETE_BODY, "storage_key": "uploads/retry2/IMG_2282.MOV", "file_size": 0},
+        )
+        assert r2.status_code == 200
+        assert r2.json()["duplicated"] is False  # 不能误杀
+        assert len(asset_repo.created) == 2  # 两条记录，放行新上传
+
+    def test_fallback_dedup_skipped_when_same_name_but_different_size(self):
+        """同名但 file_size 不同 → 不判重，正常建记录（#1714）。"""
+        client, asset_repo, _ingest_repo, _ = _client()
+        r1 = client.post(
+            "/api/v1/direct/complete",
+            json={**COMPLETE_BODY, "file_size": 5_000_000},
+        )
+        assert r1.json()["duplicated"] is False
+        r2 = client.post(
+            "/api/v1/direct/complete",
+            json={
+                **COMPLETE_BODY,
+                "storage_key": "uploads/retry3/IMG_2282.MOV",
+                "file_size": 9_999_999,  # 同名但大小完全不同的新视频
+            },
+        )
+        assert r2.status_code == 200
+        assert r2.json()["duplicated"] is False
+        assert len(asset_repo.created) == 2
+
+    def test_fallback_dedup_skipped_when_hash_present_even_if_name_size_match(self):
+        """file_hash 非空且 hash 未命中时，不允许退回同名兜底（#1714）。
+
+        hash 已能代表内容：同名同大小但 hash 不同是真实的新内容，必须放行。
+        """
+        client, asset_repo, _ingest_repo, _ = _client()
+        # 第一次：某 hash 的视频
+        r1 = client.post(
+            "/api/v1/direct/complete",
+            json={
+                **COMPLETE_BODY,
+                "file_hash": "a" * 64,
+                "client_upload_id": "tok-1",
+                "file_size": 5_000_000,
+            },
+        )
+        assert r1.json()["duplicated"] is False
+        # 第二次：同名同大小但 hash 不同（新视频内容不同）；
+        # 注意 client_upload_id 也必须不同，否则会先被 token 命中
+        r2 = client.post(
+            "/api/v1/direct/complete",
+            json={
+                **COMPLETE_BODY,
+                "storage_key": "uploads/retry4/IMG_2282.MOV",
+                "file_hash": "b" * 64,
+                "client_upload_id": "tok-2",
+                "file_size": 5_000_000,
+            },
+        )
+        assert r2.status_code == 200
+        assert r2.json()["duplicated"] is False
+        assert len(asset_repo.created) == 2
+
     def test_fallback_dedup_ignores_ready_history(self):
         """READY 历史同名素材不触发兜底（允许用户再次上传同名文件）。"""
         ready = Asset(