How to change audio tempo and pitch individuality using ffmpeg?

android audio android-ndk ffmpeg audiotrack
Vipul Purohit picture Vipul Purohit · Jun 29, 2012 · Viewed 18.2k times · Source

I have managed to play audio files using ffmpeg and AudioTrack class in my android project. I can change the speed of audio using AudioTrack class setRate method. But it also change the pitch of audio, I want to change only Tempo of audio but I found no solution on net.

anyone can please help me on this as there is no support for this.

Answer

Lri picture Lri · Apr 15, 2014

You can use the atempo filter in ffmpeg 1.0 and later:

ffmpeg -i input.wav -f:a atempo=1.25 output.wav

atempo only accepts values between 0.5 and 2.0, but you can bypass the limitation by chaining multiple filters:

ffmpeg -i input.wav -f:a atempo=2,atempo=1.5 output.wav

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