I have a series of videos I work on, and in the center is footage of a Video game, and on each end is a face. Like the screen shot below. What I would like to know is there an easier way to keep the face withing that crop field without having to use the Adobe premiere builtin motion keyframe manually. it really takes forever.
In After effects, is there a way to just crop one person, and track his face to stay within a certain space. eg. the amount of space I have available in the screenshot below?
If both people are in the same shot you can:
That should do it. The most important part of the procedure is to pick the right spot to stabilize. If you stabilized the eyes it would probably look really weird, but if you stabilized the neck that would stabilize the head and keep the shots more natural.
If it looks too stiff you may be better off just key framing position but using as few keyframes as possible. It's impossible for me to tell which would be the best approach visually because I haven't looked at the actual shot you are trying to stabilize. The best technique for any FVX shot always depends entirely on the shot.
To learn about Stabilize Motion type "stabilize motion" in the search help field at the top right corner of AE so you can learn how to use the procedure properly. There are some great community resources and the help files are quite good on the subject.
If that doesn't do it we need more details about your production workflow.