Apple Motion 5.1.1 - Manual (Page 1000)

Chapter 22 Motion tracking 1000
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Predict and Key: If a failure is detected, the tracker predicts the location of the keyframe
based on a vector of the last two keyframes, and continues tracking in the new area.
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Don’t Predict: The tracker remains in its position and searches for subsequent matches as the
clip’s frames progress. While searching for a match, the tracker does not create keyframes.
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Use Existing Keyframes: The tracker uses existing keyframes. Use this option if you manually
create track position keyframes to guide the tracker. After manually adding keyframes,
return to the start frame and start the tracking analysis. If the tracker cannot locate the track
pattern, the manually created tracking keyframes are referenced to guide the tracker.
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Color: Click or Control-click the color well to set a color for the onscreen tracker. You can also
click the eyedropper and select a color in the Canvas. The default tracker color is red. When a
tracker is selected, its center point is yellow and the border of its magnified inset is the color
set in the color well. To adjust the individual color channels, including the tracker’s opacity,
click the disclosure triangle.
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Rotation-Scale (pop-up menu): When the Match Move behavior references another behavior,
such as Analyze Motion, the Rotation-Scale tracker becomes the Rotation-Scale pop-up menu.
The tracker’s subparameters are replaced with a pop-up menu that sets the tracker from the
referenced behavior you want to apply as the Rotation-Scale tracker. By default, Track 2 is
applied as the Scale-Rotation tracker. If there is only one tracker in the referenced behavior,
Track 1 is applied to both Anchor and Rotation-Scale.
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Anchor (pop-up menu): When the Match Move behavior references another behavior, such
as Analyze Motion, the Anchor tracker checkbox becomes the Anchor tracker. The tracker’s
subparameters are replaced with a pop-up menu that lets you select the tracker from the
referenced behavior you want to apply as the Anchor tracker. By default, Track 1 from the
referenced behavior is applied as the Anchor tracker. If there is only one tracker in the
referenced behavior, Track 1 is applied to both Anchor and Rotation-Scale.
When Match Move references another behavior, the trackers from the referenced behavior are
applied to the Match Move trackers.
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Top Left: Available when four-point tracking is enabled (when Four Corners is chosen from
the Type pop-up menu) and the Match Move behavior references another behavior (such as
Analyze Motion), this pop-up menu lets you select the tracker from the referenced behavior
you want to apply as the top-left tracker.
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Top Right: Available when four-point tracking is enabled (when Four Corners is chosen from
the Type pop-up menu) and the Match Move behavior references another behavior (such as
Analyze Motion), this pop-up menu lets you select the tracker from the referenced behavior
you want to apply as the top-right tracker.
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