Instruction Manual

Chapter 22 Motion tracking 996
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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 keyframes you have manually created as a guide.
After manually adding keyframes, return to the start frame and start the tracking analysis. If
the tracker has diculty locating the track pattern, the manually created tracking keyframes
are referenced to guide the tracker.
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Color: This color control sets a new color for the onscreen tracker. The default tracker color is
red. When a tracker is selected, its center point is yellow and the border of its magnied inset
is the color set in the color well. To adjust individual color channels, including the tracker’s
opacity, click the disclosure triangle.
Match Move controls
The Match Move behavior can be applied to many object types, including groups, cameras,
shapes, particle emitters, and so on.
Important: When applying the Match Move behavior to a group, make sure the footage being
analyzed resides outside of the group being tracked.
To use Match Move (and access its parameters), your project must contain a foreground and a
background object. For information on using the Match Move behavior, see Basic Match Move
workows on page 962.
Parameters in the Inspector
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Source: Drag the source object for the match move into this well. The source object can be
another tracking behavior, an animated object, or a footage object. When a Match Move
behavior is added to an object, the nearest animated object, recorded track, or footage object
beneath the behavior in the Layers list appears in this well. To clear a Source well, drag the
item away from the well and release the mouse button.
When any nonfootage object (such as a shape or mask) is dropped in the Source well, the
trackers are no longer available in Match Move.
Note: When the Match Move behavior is applied to a mask, the masked object is selected as
the source.
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Action pop-up menu: Choose from a list of tracking data (from other tracking behaviors) in
the project.
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Movement: The Movement parameters contain the Analyze and Reverse controls, which appear
when there is a tracking source (footage) in the source well.
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Analyze: Click the Analyze button to begin the motion-tracking analysis. When you click
Analyze, a status window appears and displays the tracking progress. To stop the analysis,
click the Stop button in the status window or press Esc. The start of the track is based on the
current playhead position, rather than the start of the behavior in the Timeline.
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Reverse: When the Reverse checkbox is selected, the clip is analyzed from the current
playhead position to the rst frame of the clip (or the rst frame of the tracking behavior).
Note: You must move the playhead to the frame where you want to begin the reverse analysis.
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