We're getting started with a new project that involves some video-layering. We've got some webcam-capturing going on and want to combine that with extra layers of video (animations and stuff). I've got this working using a green background and a jit.chromakey, but with this approach I hardly get a fps of 20.
In jitter tutorial 29, it seems to be possible to blend a visual that contains an alpha channel with an underlying video. My problem here is that I can't get it to work with a Quicktime RGB+Alpha video. Is this possible, and when it is: will this give a better performance than my current "solution"?