Correct drifting by modifying tracking settings – Adobe After Effects CS4 User Manual
Page 279
273
USING AFTER EFFECTS CS4
Animation and keyframes
Last updated 12/21/2009
Motion source and its motion path
A. Moving the feature and search regions B. Keyframe marker
More Help topics
Correct drifting by adjusting the feature and search regions
1
Move the current-time indicator to the last well-tracked frame.
2
Alt-drag (Windows) or Option-drag (Mac OS) the feature and search regions only (not the attach point) to the
correct location.
3
If you are correcting the track for one frame, go to step 4. If you are correcting the track for several contiguous
frames, adjust the feature region and search region if necessary, and click Analyze. Watch the tracking to make sure
that it is accurate. If the tracking is not accurate, then click the button again to stop tracking, adjust the feature
region, and begin again.
4
When you are satisfied with the track, click Apply to apply the keyframes to the target layer or effect control point.
Correct drifting by modifying tracking settings
1
Move the current-time indicator to the last well-tracked frame.
2
In the Tracker panel, click Options.
3
Change settings in the Motion Tracker dialog box as appropriate. (See “
4
In the Tracker panel, click the Analyze Forward or the Analyze Backward button.
5
Watch the tracking to make sure that it is accurate. If the tracking is not accurate, then click the button again to stop
tracking, adjust the settings, and begin again.
6
When you are satisfied with the track, click Apply to apply the keyframes to the target layer or effect control point.
A
B