if (not _os_path.isfile(mp4_path)
or _os_path.getmtime(video) > _os_path.getmtime(mp4_path)):
arg = ['ffmpeg', '-i', video, '-acodec', 'libfaac', '-aq', '200',
if (not _os_path.isfile(mp4_path)
or _os_path.getmtime(video) > _os_path.getmtime(mp4_path)):
arg = ['ffmpeg', '-i', video, '-acodec', 'libfaac', '-aq', '200',