3
Table Of Contents
- Motion 3 Supplemental Documentation
- Contents
- 3D Compositing
- Motion Tracking
- About Motion Tracking
- How a Tracker Works
- Motion Tracking Behaviors
- Shape Track Points Behavior
- Track Parameter Behavior
- Motion Tracking Workflows
- Adjusting the Onscreen Trackers
- Strategies for Better Tracking
- Finding a Good Reference Pattern
- Manually Coaxing Your Track
- Manually Modifying Tracks
- Converting Tracks to Keyframes
- When Good Tracks Go Bad
- Smoothing Tracking Keyframe Curves
- Preserving Image Quality
- Asking Motion for a Hint
- Giving Motion a Hint
- Tracking Images with Perspective, Scale, or Rotational Shifts
- Tracking Obscured or Off-Frame Points
- Tracking Retimed Footage
- Troubleshooting Stabilizing Effects
- Removing Black Borders Introduced by Stabilizing
- Some General Guidelines
- Tracking and Groups
- Saving Tracks
- Motion Tracking Behavior Parameters
Chapter 2 Motion Tracking 85
When Good Tracks Go Bad
Once an analysis is complete, you may need to retrack a portion of the clip. Rather than
tracking over bad keyframes, it is recommended that you delete any bad keyframes
prior to retracking. If “bad” keyframes are not deleted, the tracker may continue to use
the old reference point.
To delete bad tracking keyframes:
1 Position the playhead at the frame in which you want to reset the reference pattern.
2 In the Keyframe Editor, drag to select the keyframes you want to delete.
3 Control-click in the Keyframe Editor, then choose Cut from the shortcut menu (or press
Delete).
4 In the Canvas, drag the tracker to the reference point, then click Analyze.
New track keyframes are created.