diff --git a/apps/worker/video_processing/__init__.py b/apps/worker/video_processing/__init__.py
old mode 100755
new mode 100644
index 7a9bf8a2a..e84d30c6c
--- a/apps/worker/video_processing/__init__.py
+++ b/apps/worker/video_processing/__init__.py
@@ -1,24 +1,17 @@
 """
 视频处理模块
+
+轻量工具（ffmpeg_utils / oss_helpers / dedup_helpers）顶层直接导出，
+无额外依赖。渲染相关组件（UnifiedRenderService / RenderAdapter /
+VideoProcessor 等）按需从子模块导入，避免 __init__ 阶段引入
+packages / DB 等重依赖。
 """
 
-# 共享工具模块（供 editing_modes / generation / edit_plan_generation 等复用）
+# 共享工具模块（零外部依赖，供 editing_modes / generation / edit_plan_generation 等复用）
 from . import dedup_helpers, ffmpeg_utils, oss_helpers
-from .processor import VideoProcessor, VideoResult
-from .render_adapter import RenderAdapter, RenderAdapterResult
-from .render_engine_resolver import RenderEngineResolver, get_render_engine_resolver
-from .unified_render_service import RenderResult, UnifiedRenderService
 
 __all__ = [
-    "VideoProcessor",
-    "VideoResult",
     "ffmpeg_utils",
     "oss_helpers",
     "dedup_helpers",
-    "UnifiedRenderService",
-    "RenderResult",
-    "RenderAdapter",
-    "RenderAdapterResult",
-    "RenderEngineResolver",
-    "get_render_engine_resolver",
 ]
diff --git a/apps/worker/worker_app/tasks/edit_plan_generation.py b/apps/worker/worker_app/tasks/edit_plan_generation.py
index 320be17e7..a89b9e3e9 100644
--- a/apps/worker/worker_app/tasks/edit_plan_generation.py
+++ b/apps/worker/worker_app/tasks/edit_plan_generation.py
@@ -116,6 +116,15 @@ def render_edit_plan(self, plan_id: str) -> dict:
                 rendered_clip_ids: list[str] = []
                 failed_clip_ids: list[str] = []
 
+                # 预先批量查询所有素材的 storage_key（file_url）
+                from packages.adapters.sqlalchemy_impl.models import AssetModel
+
+                clip_asset_ids = [c.asset_id for c in clips if c.asset_id]
+                asset_storage_map: dict[str, str] = {}
+                if clip_asset_ids:
+                    assets = db.query(AssetModel).filter(AssetModel.id.in_(clip_asset_ids)).all()
+                    asset_storage_map = {a.id: a.file_url for a in assets if a.file_url}
+
                 for clip in clips:
                     if not clip.asset_id:
                         # 没有素材的片段跳过，标记为失败
@@ -129,10 +138,22 @@ def render_edit_plan(self, plan_id: str) -> dict:
                         rendered_clip_ids.append(clip.id)
                         continue
 
+                    storage_key = asset_storage_map.get(clip.asset_id)
+                    if not storage_key:
+                        logger.warning(
+                            "片段素材无 storage_key，跳过: clip_id=%s asset_id=%s",
+                            clip.id,
+                            clip.asset_id,
+                        )
+                        clip.mark_failed()
+                        clip_repo.update(clip)
+                        failed_clip_ids.append(clip.id)
+                        continue
+
                     # 下载素材
-                    ext = Path(clip.asset_id).suffix or ".mp4"
+                    ext = Path(storage_key).suffix or ".mp4"
                     local_path = tmpdir_path / f"clip_{clip.order:04d}{ext}"
-                    if download_asset(clip.asset_id, local_path):
+                    if download_asset(storage_key, local_path):
                         asset_path_map[clip.asset_id] = local_path
                         rendered_clip_ids.append(clip.id)
                     else:
diff --git a/apps/worker/worker_app/tasks/generation.py b/apps/worker/worker_app/tasks/generation.py
index 7c0824d24..df6fdea30 100755
--- a/apps/worker/worker_app/tasks/generation.py
+++ b/apps/worker/worker_app/tasks/generation.py
@@ -162,13 +162,15 @@ def _build_plan_and_clips_from_task(
     """
     plan = _VirtualPlan(id=task_id, name=f"Generated-{task_id[:8]}")
 
-    # 为每个下载路径生成合成 asset_id
+    # 为每个下载路径生成合成 asset_id，并预探测素材时长
     asset_path_map: dict[str, Path] = {}
     path_to_asset_id: dict[Path, str] = {}
+    path_duration: dict[Path, float] = {}
     for i, p in enumerate(downloaded_paths):
         asset_id = f"gen_{task_id[:8]}_{i:03d}{p.suffix or '.mp4'}"
         asset_path_map[asset_id] = p
         path_to_asset_id[p] = asset_id
+        path_duration[p] = probe_duration(p)
 
     clips: list[_VirtualClip] = []
     n = len(downloaded_paths)
@@ -184,6 +186,7 @@ def _build_plan_and_clips_from_task(
                     clip_type=clip_type,
                     order=i,
                     asset_id=path_to_asset_id[p],
+                    duration=path_duration[p],
                 )
             )
     elif mode == "voice_over":
@@ -196,6 +199,7 @@ def _build_plan_and_clips_from_task(
                     clip_type="main",
                     order=i,
                     asset_id=path_to_asset_id[p],
+                    duration=path_duration[p],
                     config={"role": "b_roll"},
                 )
             )
@@ -215,6 +219,7 @@ def _build_plan_and_clips_from_task(
                     clip_type=clip_type,
                     order=i,
                     asset_id=path_to_asset_id[p],
+                    duration=path_duration[p],
                 )
             )
     else:
@@ -227,6 +232,7 @@ def _build_plan_and_clips_from_task(
                     clip_type="main",
                     order=i,
                     asset_id=path_to_asset_id[p],
+                    duration=path_duration[p],
                 )
             )