Extract audio from mp4

[mattiasstahre]

Hi,

I'm wondering if there is a way to extract the audio from an mp4 file?

For instance converting it to wav using this library.

// M

[kokorin]

Hello, for sure. Check ffmpeg documentation, command should be something like ffmpeg -i content.mp4 audio.wav

[mattiasstahre]

So maybe this should work?
FFmpeg.atPath() .addInput(UrlInput.fromUrl(gcsUrl)) .setOverwriteOutput(true) .addOutput( UrlOutput.toUrl(destinationGcsUrl.toString()) ).addArgument("-i") // Should convert to audio .setProgressListener { progress -> val percents = 100.0 * progress.timeMillis / duration.get() println("Progress: $percents%") } .execute()

That is, adding "addArgument("-i") "

[kokorin]

Without that .addArgument("-i"), Jaffree adds it itself for every Input.
And do not forget to invoke execute or executeAsync.

[mattiasstahre]

Hmm, but in this case then I would still just get a video correct? Is it adding .wav that would give me the audio?

[kokorin]

Please check ffmpeg documentation. Since wav file can't contain video, ffmpeg will ignore video stream.