After finishing my AM Stereo transmitter, I have decided to build an NTSC modulator. I think I have the actually modulation and filter blocks down, I just need to firgure out how to get the right signals from a digital video file. The file source wouldn't work; I would probably have to use gstreamer. Anyone know exactly what I'm looking for and how to get it? I need brightness, hue, saturation, and I believe that is it.