Thu Oct 15, 2015 7:47 am
If it's just two cameras in the exact same scene, I would bet one node (not a pre/post clip correction) would fix it. The only possible exception would be if it was a vastly different camera with a grossly-different exposure, like a clipped GoPro vs. a perfectly-exposed Red Epic. That might need several nodes.
The only time I use Groups is for situations where I balance out a scene -- or a series of scenes -- and then in a trim pass, the director or DP says, "hey, I really wanted this darker and greener." Since we know every shot in the scene already matches, all you need to do is a Post-clip correction that adds the change the client wants. It'll probably still require touch-ups, but this will get you close.
I've had features with 25-30 groups, but rarely do I use more than 5 or 6 per reel. For a half-hour TV show, it can be a lot faster and simpler than this. We almost never have more than 4 hours to correct an entire sitcom, and those are done every day from 4 cameras. 3 hours of correction time, 1 hour to review and trim, and then hit the button and render.
marc wielage, csi • VP/color & workflow • chroma | hollywood