Python convert wav to mp3

Question

I've looked at pymedia (discontinued), pyglet(great but no converter in there) and audiotools(command line cd ripping), and none seem suitable.

In Python 2.7 , how do you do

convert(wavFileLocation, 'mp3')

If there is no python way, how would you do it in a manner which python can invoke? (e.g. Call a Cross platform command line tool... if exists return (name, pythonCodeForInvocation) )

Solution 1

using lame (command line), you can encode wav to mp3 like this:

$ lame --preset insane /path/to/file.wav

which would create:

file.wav.mp3

in Python, you could use subprocess to call it:

wav = 'myfile.wav'
cmd = 'lame --preset insane %s' % wav
subprocess.call(cmd, shell=True)

Solution 2

I wrote a python library, pydub, that essentially does what Corey's Answer suggests, though it uses ffmpeg in to do the conversions in order to support more formats.

from pydub import AudioSegment

AudioSegment.from_wav("/input/file.wav").export("/output/file.mp3", format="mp3")

Solution 3

You must go for pydub, it is a great module for operations related with audio files.

NOTE. Do remember to install ffmpeg before you use pydub.

For help regarding installation of ffmpeg, you can use this link.

Then to install pydub just open your command prompt and type

pip install pydub

Then to convert any file from wav to mp3 just use pydub as

import pydub
sound = pydub.AudioSegment.from_wav("D:/example/apple.wav")
sound.export("D:/example/apple.mp3", format="mp3")

Comments

[g19fanatic]

which OS? Linux has some great command line utilities that would allow you to do this without much issue.

[xxjjnn]

Linux =) But it needs to run on mac too

[g19fanatic]

for linux, this solution gives you an answer stackoverflow.com/a/6578380/496405 use ffmpeg should also work under mac :)

[Jiaaro]

@Basj Not currently, no - you'd need to save the wav data to a file on disk, and then convert it to mp3 afterward. There has been some discussion about support for operating on steams/iterators, but nothing has come to fruition so far

[Vichoko]

After hours of trying on-line methods to save audio in a compressed format like mp3 or ogg from WAV-PCM data, this solution is the only one that have worked for me on Windows 10.

[colidyre]

If you rename it, there is only another name. But it is not really converted. A wav file is something different than a mp3 file, even if you name it like a mp3 file.

[SpiralDev]

This what worked for me: song.export(mp3_path, format="mp3", codec="libmp3lame")