I'm trying to figure out a method of expediting a rotoscoping workflow for a demo project I'm working on. Here is the scenario of the shot:
- still camera
- still background
- person walks in and moves around the background
The shot was originally created using green screen footage of the actress moving around, and composited over a CG environment (CG room, window, etc.)
We no longer have access to the original green screen footage however, and must work with the final, post-composited shot.
Basically, is there a method of telling After Effects to take the background (since she walks into the frame), and anything that doesn't match that background over the next X amount of frames, mask it? It seems like this would be possible.