将.aiff音频文件转换为.wav

Question

I'm trying to convert some audio files using a python script. The source folder contains both .wav and .aiff audio files, with different bitrates and sampling rates.

INPUT Files example

I need all the audio files to be converted to mono 16bit 44.1khz .wav

OUTPUT Files example

At the moment I'm succesfully using pysoundfile library to open and write/convert .wav files to PCM_16 type.

What I don't know how to do, is converting .aiff files to .wav ones.

I know Python handles .aiff files with the aifc library, but it doesn't seems to include any kind of conversion functionality.

How can I do that?

Answer 1

Disclaimer: Probably this is not the answer you're looking for, because it is not "Python-only"; however, when I tried to work with media files in a large Python script I found this method easier than searching and reading documentation of a bunch of libraries for each media format I needed.

Install a media converter (fe, I use FFmpeg ), whose commands you can execute from Windows command line or Linux terminal. Then you can call these commands from a Python script:

from subprocess import call 
call('ffmpeg -i D:/Audio/IN/sample.aiff -acodec pcm_s16le -ac 1 -ar 44100 D:/Audio/OUT/sample.wav')

(Here '-ac 1' means 1 audio track, that is, we convert to mono.) You can also extract audio from any video format in a similar way.

Answer 2

This is a non-issue. The soundfile module you are already using does support AIFF files out-of-the-box. Just specify the file name and you are done!

You can use the function soundfile.available_formats() to get a list of supported formats. The soundfile module uses the libsndfile library under the hood. There is a list of supported formats on their homepage (which contains AIFF).

Like @Wolfram mentioned, you can of course also use FFmpeg instead. Another great external tool for audio conversion is SoX .