Some videos (without audio) fail to extract

[emcf]

error 'NoneType' object has no attribute 'write_audiofile' occuring on line video.subclip(start_time, end_time).audio.write_audiofile(audio_path, codec='pcm_s16le')

Could probably fix with a simple none check

audio = video.subclip(start_time, end_time).audio
if audio is None:
  transcription = None
else:
  audio.write_audiofile(audio_path, codec='pcm_s16le')
  ...