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
90 Chapter 2 Motion Tracking
In the following image, the tracker is positioned on a reference pattern on the front
bumper of the car.
2 In the Behaviors tab of the Inspector, use the Look Ahead Frames slider or value slider
to specify how many frames you want the tracker to look ahead.
Note: The maximum amount of frames for the Look Ahead Frames slider is 10 frames.
However, you can enter a larger frame amount using the adjacent value slider.
3 While holding down the Command key, click the tracker in the Canvas, then drag in the
direction the reference pattern is moving in the clip.
As you Command-drag the track point, an inset displays a magnified view of the frame
specified in the Look Ahead Frames parameter.
4 When the look-ahead tracker is positioned on the reference pattern, release the mouse
button.
Note: Look Ahead Frames can be used when tracking in reverse—you are looking at
previous frames rather than future frames.
Tracker