diff --git a/backend/main.py b/backend/main.py
index 71ac4bf..b3d374a 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -456,6 +456,8 @@ def vsf_output(out, ):
             Thread(target=vsf_output, daemon=True, args=(p.stderr,)).start()
             p.wait()
             self.vsf_running = False
+        # 释放资源
+        self.video_cap.release()
 
     def filter_watermark(self):
         """