先用pip安装视频处理的库:pip install moviepy
from moviepy.editor import * #导入库
video = VideoFileClip('test.mp4') #视频路径
audio = video.audio
audio.write_audiofile('test.mp3') #导出音频路径
支持以下格式
extensions_dict = { "mp4": {'type':'video', 'codec':['libx264','libmpeg4', 'aac']},
'ogv': {'type':'video', 'codec':['libtheora']},
'webm': {'type':'video', 'codec':['libvpx']},
'avi': {'type':'video'},
'mov': {'type':'video'},
'ogg': {'type':'audio', 'codec':['libvorbis']},
'mp3': {'type':'audio', 'codec':['libmp3lame']},
'wav': {'type':'audio', 'codec':['pcm_s16le', 'pcm_s24le', 'pcm_s32le']},
'm4a': {'type':'audio', 'codec':['libfdk_aac']}
}