Motion Tracking Question

Motion tracking is the process where you specify one or more points in your image, for the computer to track.

This way, the software will be able to compensate for the cameramovement, and link movement of other effects layers to the cameramovement.

You'd have to have at least one, and better 2 points in the images that the computer could track. They often put ping-pong balls in a scene to use when motion-tracking later, but a clear point with some contrast will do.

After Effects has a motion tracker but it's no good. Commotion has a very famous motion tracker, and so does Combustion.

It's impossible to go in depth here on the complete process that you'd have to go through. Look into either of the programs, there will be manuals or help-files that explain more...

HTH

1 Point : obviously gives you only a position referal
2 Points : gives you the ability to track Position, Rotation and Scaling (while scaling is available only for ONE axis (with or height)
3 Points : gives you Position, Rotation and scaling.