Update pipeline.py

pipeline.py

@@ -1023,7 +1023,8 @@ class AnimateDiffPipeline(DiffusionPipeline, TextualInversionLoaderMixin, IPAdap
                     for index in range(context_size):
                         # if its the first timestep, spread the indexes out evenly over the full frame range, offset by the group index
                         if timestep == 0:
-                            frame_index = (group_index * (context_size - overlap)) + index
+                            step_size = total_frames // context_size
+                            frame_index = index * (step_size + group_index)
                         else:
                             # Calculate the frame index
                             frame_index = (group_index * (context_size - overlap)) + (offset * timestep) + index