How to convert MP3 to WAV in Python

Question

If I have an MP3 file how can I convert it to a WAV file? (preferably, using a pure python approach)

Answer 1

Install the module pydub. This is an audio manipulation module for Python. This module can open many multimedia audio and video formats. You can install this module with pip.

pip install pydub

If you have not installed ffmpeg yet, install it. You can use your package manager to do that.

For Ubuntu / Debian Linux:

apt-get install ffmpeg

When ready, execute the below code:

from os import path
from pydub import AudioSegment

# files                                                                         
src = "transcript.mp3"
dst = "test.wav"

# convert wav to mp3                                                            
sound = AudioSegment.from_mp3(src)
sound.export(dst, format="wav")

Check this link for details.

Answer 2

This is working for me:

import subprocess
subprocess.call(['ffmpeg', '-i', 'audio.mp3',
                   'audio.wav'])

Answer 3

I maintain an open source library, pydub, which can help you out with that.

from pydub import AudioSegment
sound = AudioSegment.from_mp3("/path/to/file.mp3")
sound.export("/output/path/file.wav", format="wav")

One caveat: it uses ffmpeg to handle audio format conversions (except for wav files, which python handles natively).

note: you probably shouldn't do this conversion on GAE :/ even if it did support ffmpeg. EC2 would be a good match for the job though