Severe drop in it/s after hitting ffmpeg_reader.py error

[samuelbraun04]

When rendering a video, I get around 20 it/s until my program hits the following error:

path-to-here\site-packages\moviepy\video\io\ffmpeg_reader.py:155: UserWarning: In file path-to-here\stock.mp4, 6220800 bytes wanted but 0 bytes read at frame index 1501 (out of a total 1502 frames), at time 60.04/60.10 sec. Using the last valid frame instead.
  warnings.warn(

Once this error is hit I drop from ~20 it/s to just under 2 it/s. Here's a rendering example:

frame_index:   2%|▊                                   | 1441/69120 [01:04<57:35, 19.58it/s, now=None]path-to-here\moviepy\video\io\ffmpeg_reader.py:155: UserWarning: In file path-to-here\stock.mp4, 6220800 bytes wanted but 0 bytes read at frame index 1501 (out of a total 1502 frames), at time 60.04/60.10 sec. Using the last valid frame instead.
  warnings.warn(
frame_index:  11%|███▊                             | 7918/69120 [36:09<10:17:50,  1.65it/s, now=None]

Does this happen for anyone else? If so, how did you guys fix it? Thanks.

[samuelbraun04]

Turns out it wasn't because of because of warning. It only drops to 1 it/s when rendering a reversed video.