Update train_config.py

train_config.py

@@ -47,7 +47,7 @@ DATA_PATHS = {
     },
     'background_videos': {
         'train': '../matting-data/BackgroundVideos/train',
-        'valid': '../matting-data/BackgroundVideos/train',
+        'valid': '../matting-data/BackgroundVideos/valid',
     },
     
     
@@ -65,4 +65,4 @@ DATA_PATHS = {
         'annfile': '../matting-data/YouTubeVIS/train/instances.json',
     }
     
-}
+}