diff --git a/apps/worker/worker_app/tasks/ingest.py b/apps/worker/worker_app/tasks/ingest.py
index 1305e9846..072d97d7a 100755
--- a/apps/worker/worker_app/tasks/ingest.py
+++ b/apps/worker/worker_app/tasks/ingest.py
@@ -247,7 +247,9 @@ def ingest_asset(job_id: str) -> dict:
                     )
                     _tc_tmp = None
                     try:
-                        _tc_tmp = Path(tempfile.mktemp(suffix="_h264.mp4"))
+                        _tc_tmp_file = tempfile.NamedTemporaryFile(delete=False, suffix="_h264.mp4")
+                        _tc_tmp = Path(_tc_tmp_file.name)
+                        _tc_tmp_file.close()  # 关闭文件描述符，ffmpeg 会自己打开
                         _cmd = [
                             "ffmpeg",
                             "-y",
@@ -273,7 +275,8 @@ def ingest_asset(job_id: str) -> dict:
                         ]
                         _proc = subprocess.run(
                             _cmd,
-                            capture_output=True,
+                            stdout=subprocess.DEVNULL,
+                            stderr=subprocess.PIPE,
                             text=True,
                             timeout=300,
                         )