Sometimes I can get more than one copy of the same video clip from different sources and would like to compare them side-by-side on perhaps two screens. The way the TMPGen series of programs handles one video might be nice, but with two viewing screens and two "timeline" like displays. Any pointers?
AVISynth: stackhorizontal() But they need to be the same res/framerate. You can resize, etc. in AVISynth though on the fly.