Grab sound of a SDL game with ffmpeg/avconv

Posted by Peregring-lk on Ask Ubuntu See other posts from Ask Ubuntu or by Peregring-lk
Published on 2013-11-04T03:53:51Z Indexed on 2013/11/04 4:13 UTC
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Filed under:

alsa

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ffmpeg

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avconv

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sdl

I'm trying to make a screencast of a SDL game which I developed some years ago, with the following command:

sleep 5 && avconv -f x11grab -s 1366x768 -r 25 -i :0.0 -same_quant screen_cast.mkv

(in this 5 seconds of sleep, I open the game).

But the generated video (screen_cast.mkv) doesn't capture audio.

I use for my game the SDL_Mixer library, with default configuration (22050 for frequency, AUDIO_S16SYS for format, and 2 channels).

What's the problem? (with options -f alsa -i pulse it doesn't work either).

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