首先：pip install moviepy -i https://pypi.tuna.tsinghua.edu.cn/simple

然后：新建my4tomy3.py

from moviepy.editor import *
# 要转换的mp4文件
video = VideoFileClip('/home/cjh/videos/music01.mp4')
audio = video.audio
# 转换为mp3文件
audio.write_audiofile('/home/cjh/videos/music01.mp3')