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#158: Extract the Audio of an MP4 Video

I have some videos from which I would like to extract the audio and save it as MP3. I could do that manually with VLC media player, but there is a much better solution in Python.

Install MoviePy

MoviePy is a Python module for video editing, which we can use to work with video files and modify them as we need. You can install MoviePy with this command:

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pip install moviepy

Extract the audio

We need to import the video into MoviePy. From there we can access the audio and write it into a new MP3 file:

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import moviepy
import moviepy.editor

video = moviepy.editor.VideoFileClip("video.mp4")
audio = video.audio

audio.write_audiofile("only_audio.mp3")

Conclusion

MoviePy is a powerful module that allows us to turn MP4 into MP3 with just a few lines of code. If you are interested in working with videos, you should check official documentation of MoviePy to see what else you can do.