-SNIPS-
Capturing's not the easiest thing to do on Linux, as it means capturing the raw data, then transcoding it to a video file.
I used GLC when I did my last Linux based Torivideo, the quality was ace, but the constant file converting means it takes at least twice as long to make a video.
Video editing is best with Cinerella on Linux, but it only handles Quicktime .MOV files. It's also pretty complicated, but as powerful as Vegas.