如何在上传时将音频转换为“.WAV”格式

Question

I am developing one application where the users can upload audio files to the server by

using any android version in the mobile. By using in built android voice recorder they can

create only .amr format of the audio. But I need audio in the .wav format for some

telephonic use at the server side .

Is there any way in android to create .wav format in built android voice recorder

or at the server end is it possible convert any audio file format to .wav using PHP.

Any help would be thanksfull.

Answer 1

The best approach would be using FFMPEG as an php extension or you could run ffmpeg directly for converting. The simple way to do using php is:

<?php exec(ffmpeg -i audio.amr testwav.wav) ?>

But you may encounter some difficulties. So you should add some parameters. You could use "-ar" to set audio sampling rate (in Hz), "-ab" to set audio bit rate (in bits/s) and etc. Below is the sample:

<?php exec("ffmpeg -i audio.amr -ar 22050 -ab 32 -map_meta_data audio.wav:audio.amr audio.wav"); ?>