error open

app.py

@@ -179,6 +179,9 @@ def extract_frames(video_path):
     frames = []
     print(f"video path {video_path}")
     cap = cv2.VideoCapture(video_path)
+    if not cap.isOpened():
+        print("Error: Could not open video file.")
+        return []
     
     while True:
         ret, frame = cap.read()