diff --git a/gnes/preprocessor/video/video_decoder.py b/gnes/preprocessor/video/video_decoder.py
index e20a8a60..bf734bcf 100644
--- a/gnes/preprocessor/video/video_decoder.py
+++ b/gnes/preprocessor/video/video_decoder.py
@@ -60,6 +60,8 @@ def apply(self, doc: 'gnes_pb2.Document') -> None:
                     c.blob.CopyFrom(array2blob(frame))
                     c.offset = i
                     c.weight = 1.0
+            elif self.chunk_spliter == 'none':
+                pass
             elif self.chunk_spliter == 'shot':
                 raise NotImplementedError
             else: