diff --git a/apps/worker/video_processing/oss_helpers.py b/apps/worker/video_processing/oss_helpers.py
index 20fff48d4..96bf9973f 100755
--- a/apps/worker/video_processing/oss_helpers.py
+++ b/apps/worker/video_processing/oss_helpers.py
@@ -142,19 +142,20 @@ def _download_via_http(url: str, local_path: Path) -> bool:
         return False
 
 
-def upload_to_oss(local_path: Path, storage_key: str) -> str | None:
+def upload_to_oss(local_path: Path | str, storage_key: str) -> str | None:
     """上传文件到 OSS，返回公开 URL。
 
     大文件（>100MB）自动走分片上传，降低内存峰值，减少 OOM 风险。
     上传加总超时保护（默认 300s），防止网络异常时无限挂死。
 
     Args:
-        local_path: 本地文件路径
+        local_path: 本地文件路径（Path 或 str 均可）
         storage_key: 目标存储键
 
     Returns:
         公开访问 URL，上传失败或 OSS 未配置时返回 None。
     """
+    local_path = Path(local_path)  # 统一转 Path，兼容 str 调用
     bucket = oss_bucket()
     if bucket is None:
         return None