diff --git a/controller/api/bilirecorder_blueprint.py b/controller/api/bilirecorder_blueprint.py
index 812b1ba..68d98cd 100644
--- a/controller/api/bilirecorder_blueprint.py
+++ b/controller/api/bilirecorder_blueprint.py
@@ -51,9 +51,11 @@ def auto_submit_task():
                 *[clip.full_path for clip in video_clip.danmaku_clips[1:]]
             )
             clear_item()
+            def _clear_encode_flag_callback(_f: "Future"):
+                IS_ENCODING.clear()
+            _future.add_done_callback(_clear_encode_flag_callback)
             if VIDEO_ENABLED:
                 def _encode_finish_callback(_f: "Future"):
-                    IS_ENCODING.clear()
                     _result = _f.result()
                     if _result:
                         # start uploading