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How to add an additional tracker

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Bob StevensHow to add an additional tracker
by on Mar 4, 2010 at 3:57:00 pm

I am tracking for Position, Rotation, and Scale. When I click those options it gives me two trackers to use.

I'd like to add an additional tracker. How do I do that?



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Todd KoprivaRe: How to add an additional tracker
by on Mar 4, 2010 at 11:45:30 pm

The number of tracking points is determined by what kind of tracking you're doing.

from "Track or stabilize motion":

"When you select Rotation or Scale in the Tracker panel, you set two track points in the Layer panel.... After Effects calculates rotation by measuring the change of angle of the line between the attach points.... After Effects calculates scale by comparing the distance between attach points on each frame with the distance between the attach points on the start frame."

Why is it that you want a third point?

Todd Kopriva, Adobe Systems Incorporated
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