update modeling_ovis.py

modeling_ovis.py

@@ -504,6 +504,7 @@ class Ovis(OvisPreTrainedModel):
                              f' but got {type(text_or_conversations)}')
 
         if frame_selector is not None:
+            frame_selector_kwargs = frame_selector_kwargs or {}
             conversations, images = frame_selector(conversations=conversations, frames=images, **frame_selector_kwargs)
 
         # format conversations