优化替换角色添加音频

core/backend/apps/ai/free_video.py

@@ -1048,6 +1048,37 @@ def finalize_free_video(*, task: AITask) -> AITask:
         return locked
 
 
+def rehydrate_ref_urls(references) -> list:
+    """参考素材快照里的 URL 是提交当时签的 TOS 预签名链(1 小时过期),历史记录隔天再点开就播不了。
+    凡是带 asset_id 的,按当前资产重新取长期直链(顺带补上视频封面),老任务也一起救回来。
+    素材库引用(source=library)的 asset_id 指向 FreeAsset 不是 Asset,查不到就原样保留快照。"""
+    refs = [item for item in (references or [])]
+    ids = set()
+    for item in refs:
+        if not isinstance(item, dict) or item.get("source") == "library":
+            continue
+        if item.get("asset_id"):
+            try:
+                ids.add(uuid.UUID(str(item["asset_id"])))
+            except (ValueError, TypeError, AttributeError):
+                continue
+    if not ids:
+        return refs
+
+    from .services import asset_stable_url
+
+    assets = {str(a.id): a for a in Asset.objects.filter(id__in=ids).prefetch_related("files")}
+    fresh = []
+    for item in refs:
+        asset = assets.get(str(item.get("asset_id") or "")) if isinstance(item, dict) else None
+        url, thumb = asset_stable_url(asset) if asset is not None else ("", "")
+        if not url:
+            fresh.append(item)
+            continue
+        fresh.append({**item, "url": url, **({"thumb_url": thumb} if thumb else {})})
+    return fresh
+
+
 def serialize_free_video_task(task: AITask, *, include_deleted_assets: bool = False) -> dict:
     """任务 → 前端契约。视频/封面直链从 generated_assets 取(TOS 公读),转存失败回落火山临时 URL。"""
     payload = task.request_payload or {}
@@ -1097,7 +1128,7 @@ def serialize_free_video_task(task: AITask, *, include_deleted_assets: bool = Fa
         "seed": payload.get("seed", -1),
         "seed_used": payload.get("seed_used"),
         "generate_audio": payload.get("generate_audio", True),
-        "references": payload.get("references") or [],
+        "references": rehydrate_ref_urls(payload.get("references")),
         "estimated_tokens": payload.get("estimated_tokens") or 0,
         "actual_tokens": payload.get("actual_tokens") or 0,
         "estimated_cost": str(task.estimated_cost),