优化视频复刻和商品内容大小

core/backend/apps/ai/free_video.py

@@ -811,15 +811,17 @@ def _notify_failure(task: AITask, *, raw: str, hint: str) -> None:
     )
 
 
-def _store_free_video_media(*, task: AITask, media: str) -> Asset:
-    """下载火山结果 → 转存 TOS(火山原始 URL 仅 7 天有效)→ 建 Asset(FREE_CREATE,自动入库)
-    + ffmpeg 抽首帧封面挂同 Asset 非主文件。"""
-    fileobj, content_type = VolcanoArkProvider.media_to_bytes(media)
-    if "video" not in content_type:
-        content_type = "video/mp4"
-    # 先取字节再上传:boto3 upload_fileobj 完成后会 close 掉 BytesIO,之后 getvalue() 直接抛
-    # "I/O operation on closed file",封面抽帧就永远做不了(实测踩坑)。
-    video_bytes = fileobj.getvalue() if isinstance(fileobj, BytesIO) else b""
+def _store_free_video_media(*, task: AITask, media: str = "", video_bytes: bytes | None = None) -> Asset:
+    """下载火山结果(或已拼好的字节) → 转存 TOS → 建 Asset + ffmpeg 抽首帧封面。"""
+    content_type = "video/mp4"
+    if video_bytes is None:
+        fileobj, content_type = VolcanoArkProvider.media_to_bytes(media)
+        if "video" not in content_type:
+            content_type = "video/mp4"
+        # 先取字节再上传:boto3 upload_fileobj 完成后会 close 掉 BytesIO,之后 getvalue() 直接抛
+        # "I/O operation on closed file",封面抽帧就永远做不了(实测踩坑)。
+        video_bytes = fileobj.getvalue() if isinstance(fileobj, BytesIO) else b""
+    fileobj = BytesIO(video_bytes)
     asset_id = uuid.uuid4()
     object_key = f"teams/{task.team_id}/free-create/{asset_id}.mp4"
     stored = TosStorage().upload_fileobj(fileobj=fileobj, object_key=object_key, content_type=content_type)