What tool you use will depend on what the shot looks like. If you shot a blank plate of the background, then all you'll need is some basic masking. If you didn't, you'll need to shift some layers around in time and use masking and/or use the clone tool.
- The Great Szalam
(The 'Great' stands for 'Not So Great, in fact, Extremely Humble')
No trees were harmed in the creation of this message, but several thousand electrons were mildly inconvenienced.
After Effects doesn't have the capability to fill in missing portions of a shot: it doesn't really know how to invent pieces of a picture that aren't there. So if you remove a person from a shot -- and do it so it looks photorealistic -- you have to answer the question, "What sort of video am I going to use to fill up this hole in my shot?"
If you can answer that question, you have a fighting chance of doing it.
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA