How to convert mp4 to mp3 using python

Question

How can I convert a mp4 or mpeg4 file to mp3 using python?

I have looked at several libraries without success.

Solution

This sounds like task for MoviePy. After you install it (installation howto) it could be used following way:

import os
from moviepy.editor import *
video = VideoFileClip(os.path.join("path","to","movie.mp4"))
video.audio.write_audiofile(os.path.join("path","to","movie_sound.mp3"))

Just replace "path","to","movie.mp4" and "path","to","movie_sound.mp3" according to your needs.

EDIT: To avoid the KeyError: 'video_fps', do ensure that you aren't inputting any video which does not contain any visual content.

Comments

[Sarang Manjrekar]

give me the error while using VideoFileClip : KeyError: 'video_fps'

[Yaroslav Dukal]

same error.. any solutions to this??

[megha]

This worked for me. @YaroslavDukal from moviepy.editor import * def mp4_to_mp3(mp4, mp3): mp4_without_frames = AudioFileClip(mp4) mp4_without_frames.write_audiofile(mp3) mp4_without_frames.close() # function call mp4_to_mp3("my_mp4_path.mp4", "audio.mp3")

[drascom]

thanks megha your solution is working at 01/2022