I'm consternated with my Debian sid, I can't capture my screen with xvidcap or istanbul anymore,
marvil told me that they work in Ubuntu, why not in Debian?
It was a pain the ass to research for a good an usable solution for me, because I have an old laptop CPU(Centrino 1.8Ghz), but 2 weeks later, here is the best solution I found at the moment. Sox is a "Swiss army knife of sound processing" with sound recording capabilities and ffmpeg is a "multimedia player, server and encoder" with screen capture capabilities.