Motion tracking is a method of recording the movement of an element (a shape or reference point in a movie clip) in the canvas, then applying that recorded movement data to another element in the canvas. For example, you can use motion tracking techniques to:
“Pin” a post-production graphic to the side of a moving bus
“Track” a blurry circle to a person’s face to preserve an innocent bystander’s anonymity
Stabilize a ridiculously shaky camera to vastly improve a “found-footage” thriller
“Replace” a daring stuntman’s head with the mug of a lazy leading actor
There are six tracking behaviors available in Motion. You apply a tracking behavior to an object in your project (typically a movie clip) to record and analyze its movement. The result of this analysis is a track—recorded movement data—that can be applied to any other object in the project, transferring the motion of a source object to a destination object.