[LAU] Tutorial on sidechain compression in Qtractor and a question about screencasting

Hello all, I've uploaded a new tutorial to YouTube: http://www.youtube.com/watch?v=pnAqk054g7E So using sidechain compression in Qtractor with the SC3 LADSPA plugin. Concerning screencasting, anybody any experience with this? For this tutorial I used recordMyDesktop, but it captures video to Theora, so after editing and uploading the quality degrades considerably. The big advantage of recordMyDesktop though is that it has JACK support and that the overhead is pretty small so I can still run my setup at a decent latency. I've also started playing around with FFmpeg. The video quality is waaaaay better if you capture to a lossless format but I'm having my thoughts on the audio part. I compiled FFmpeg myself with libjack-dev so it has JACK support. But FFmpeg apparently has troubles to keep up with latencies below 20ms, lots of xruns on the FFmpeg side (JACK doesn't complain though). And I have the feeling FFmpeg lags on the audio side. So I'm thinking about capturing the video part with ffmpeg and the audio part with jack_capture and mux the stuff later. But if anyone has any other suggestions, let me know. Best, Jeremy