5.5

1159Motion User Guide
Additional parameter controls for the track appear.
7. Click the Fail Behavior pop-up menu, then choose Use Existing Keyframes.
8. Go to the first frame of the clip, then click the Analyze button in the Behaviors Inspector.
Note: You can also use the Tracker Preview in the Behaviors Inspector to reposition
trackers in the canvas.
Edit the analysis data
If none of the prior solutions helps, you can review the analysis data in the Keyframe Editor,
then manually adjust or delete problem tracking point data.
Note: This technique is applicable only to trackers that you can adjust in the canvas or
Behaviors Inspector.
1. In the Layers list or Timeline in Motion, select an applied behavior.
2. In the Keyframe Editor, review the curve of the confidence parameter (Track1.
Confidence, for example) for frames where the values are very low; if you see unusual
spikes at frames where the Confidence curve value is low, proceed to step 3.
3. Choose Object > Convert to Keyframes (or press Command-K).
A dialog appears confirming the conversion.
4. Click Confirm.
The behavior is converted into editable keyframes and the tracking behavior is deleted.
5. In the Layers list or Timeline, select the clip.
6. In the Keyframe Editor, modify or delete the points where the Confidence value is low.
See Add or delete keyframes in the Keyframe Editor in Motion or Modify keyframes in
the Keyframe Editor in Motion.
Track perspective, scale, or rotational shifts in Motion
For clips that undergo significant changes in size and camera angle, you can try a few
different strategies.
Use a larger search area
• In the Behaviors Inspector in Motion, move the pointer over the track row, click Show to
display the Search Size parameter, then increase its value.
Lower the Fail Tolerance value
• In the Behaviors Inspector in Motion, move the pointer over the track row, click Show
to display the Fail Tolerance parameter, then decrease its value. With a lower Fail
Tolerance value, the tracker is more likely to find a false match. With a higher value, the
tracker is more strict in finding a match.
Begin the analysis at the clip’s midpoint
• In Motion, move the playhead to midpoint frame of the clip, and click Analyze in the
Behaviors Inspector to track forward to the end frame of the clip; then return to the
midpoint frame, click the Reverse checkbox in the Behaviors Inspector, and click
Analyze to track backward to the beginning of the clip.