text: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  """
  Created on Wed Apr 28 21:53:36 2021
  @author: hulkliu
  covert from vidoe to audio
  """
  
  import sys
  import moviepy.editor as mp
  import re
  
  file =  sys.argv[1]
  name = re.sub('\.[0-9a-zA-Z]*$','',file)
  mp.VideoFileClip(file).audio.write_audiofile(name+'.wav')
  