fix(main.py): handle argument parsing errors and improve error messages

croppa/main.py

@@ -339,6 +339,7 @@ class VideoEditor:
         # Apply brightness/contrast first (to original frame for best quality)
         processed_frame = self.apply_brightness_contrast(processed_frame)
 
+        
         # Apply crop
         if self.crop_rect:
             x, y, w, h = self.crop_rect
@@ -1420,17 +1421,28 @@ def main():
         "video", help="Path to video file or directory containing videos"
     )
 
-    args = parser.parse_args()
+    try:
+        args = parser.parse_args()
+    except SystemExit as e:
+        # If launched from context menu without arguments, this might fail
+        input(f"Argument parsing failed. Press Enter to exit...")
+        return
 
     if not os.path.exists(args.video):
-        print(f"Error: {args.video} does not exist")
+        error_msg = f"Error: {args.video} does not exist"
+        print(error_msg)
+        input("Press Enter to exit...")  # Keep window open in context menu
         sys.exit(1)
 
     try:
         editor = VideoEditor(args.video)
         editor.run()
     except Exception as e:
-        print(f"Error: {e}")
+        error_msg = f"Error initializing video editor: {e}"
+        print(error_msg)
+        import traceback
+        traceback.print_exc()  # Full error trace for debugging
+        input("Press Enter to exit...")  # Keep window open in context menu
         sys.exit(1)