Maintainer's notes

Grab video (800×600) with 30 pixel top-offset.

ffmpeg -r 24 -f x11grab -s 994x746 -i :0.0+0,30 -threads 0 -vcodec libx264 /tmp/out.mkv

Transcode said video to ogg format:

ffmpeg2theora /tmp/out.mkv

jack_rec -f /tmp/showcase.wav 'ardour:master/audio_out 1' 'ardour:master/audio_out 2' -b 16 -d100000

NOTE: Without the -d option it seems the recording is terminated immediately…