I would like FFProbe to tell me the duration in milliseconds. I created a workaround as follows, but would like native support: ``` mp4_data = FFProbe(mp4_file) duration_s = mp4_data.__dict__['metadata']['Duration'] # convert to duration by pretending it's a time since 00:00:00.00 zero = datetime.datetime.strptime('00:00:00.00', '%H:%M:%S.%f') duration = datetime.datetime.strptime(duration_s, '%H:%M:%S.%f') - zero total_duration += duration.seconds * 1000 + duration.microseconds / 1000 ```