This may be a totally stupid and illiterate question - but hey that's the internet - so I ask anyway.
Is there a way these days to remove the background from a video so that it can be substituted with another video (similar to the old blue box trick)? What I was thinking is that if I record a video A let's say of a person and then take a still or short video sequence B without the person (exact same settings, same light, etc.), is it possible to compare A and B and turn everything that is the same in both into an alpha channel for transparency in video A (so that only the person remains)?
thanks a lot. this does already help.
I got some fairly promising results which make it worthwhile trying to capture some real footage and process it via Magic
