Update utils/utils.py

utils/utils.py

@@ -978,4 +978,21 @@ def get_file_manager(base_dir: Optional[str] = None) -> FileManager:
     global _default_file_manager
     if _default_file_manager is None or base_dir is not None:
         _default_file_manager = FileManager(base_dir)
-    return _default_file_manager
+    return _default_file_manager
+
+def validate_video_file(file_path: str) -> bool:
+    """Validate if file is a valid video file."""
+    import os
+    import cv2
+    
+    if not os.path.exists(file_path):
+        return False
+    
+    try:
+        cap = cv2.VideoCapture(file_path)
+        ret = cap.isOpened()
+        cap.release()
+        return ret
+    except:
+        return False
+