Apple Motion 4 - Manual (Page 1247)

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, or “replace” a
daring stuntman’s head with the lazy mug of a leading actor.
This chapter covers the following:
• About Motion Tracking (p. 1248)
• How a Tracker Works (p. 1249)
• Motion Tracking Behaviors (p. 1250)
• Shape Track Points Behavior (p. 1252)
• Track Parameter Behavior (p. 1252)
• General Motion Tracking Workflow (p. 1252)
• Match Move Workflows (p. 1257)
• Using a Non-Match Move Four-Point Track for Corner-Pinning (p. 1271)
• Stabilize Workflow (p. 1274)
• Unstabilize Workflow (p. 1277)
• Track Points Workflow (p. 1278)
• Track Parameter Workflow (p. 1282)
• Adjusting the Onscreen Trackers (p. 1283)
• Strategies for Better Tracking (p. 1285)
• Tracking Behavior Parameters (p. 1304)
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