使用python把MP4转化为MP3

使用python把MP4转化为MP3

• 功能：把文件下所有文件.mp4 文件转化为.mp3 文件
• 我本地环境：windows,Python 2.7.18

准备

cmd安装：pip install moviepy

关于类型转换：

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']}
                  }

• 可看到支持ogg、mp3、wav和m4a四种格式，个人测试m4a输出失败，建议只用mp3和wav
• 测试2分钟的视频导出mp3为1.83Mb，wav为20.1Mb
• mp3是有损格式，wav是无损格式，按需选择

源码

# -*- coding: utf-8 -*
from moviepy.editor import *
import os

datanames = os.listdir('C:\\Users\\lenovo\\Desktop\\HarmonicaCollection\\')
for i in datanames:
    if os.path.splitext(i)[1]=='.mp4':
        video = VideoFileClip(i)
        audio = video.audio
        audio.write_audiofile(os.path.splitext(i)[0]+ '.mp3')

参考地址：https://blog.youkuaiyun.com/lly1122334/article/details/90283655