Hi - I'm having trouble getting multicam to work with greenscreen. Basically, I have an mp4 from camera 1, another mp4 from camera two, and a wave file. Both cams 1 and 2 were filmed on greenscreen, and I have been using ultrakey to key out the green and replace greenscreen with a background image. However, premier pro seems unhappy with that and seems to want to work only with the raw mp4 files. I also usually create proxies, but unsure if I can still do that and multicamp.