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 99
To reference another tracking behavior in a project:
1 Add an Analyze Motion, Match Move, Stabilize, or Unstabilize behavior.
2 In the tracking behavior’s HUD or Inspector, choose a track from the tracking behaviors
pop-up menu.
The track is applied to the tracking behavior.
Motion Tracking Behavior Parameters
The following section provides a detailed description of the parameters available in the
different tracking behaviors.
Note: Cloned objects cannot be tracked.
Analyze Motion Controls
The Analyze Motion behavior is designed for use with footage (a movie or image
sequence). This behavior can be thought of as a “traditional” correlation tracker—you
position an onscreen tracker on a reference pattern on a clip. The movement of the clip
at the specified reference point is analyzed, and the analyzed data is saved in the
behavior. The recorded data can then be applied to other objects in the project.
The Analyze Motion behavior does not transform the input image. It is used only to
generate tracks that can be referenced by the Match Move and Stabilize behaviors.
Note: Analyze Motion cannot reference other tracking behaviors.
Important: The Analyze Motion behavior can only be applied to footage objects (a
QuickTime movie or image sequence).
Parameters in the HUD
The Analyze Motion HUD contains controls to start the motion track (the Analyze
button), reverse the direction of the track (the Reverse checkbox), and to specify an
offset track (the Offset Track checkbox). Offset tracking allows you to reposition the
tracker at a new reference pattern. The HUD parameters, which also appear in the
Inspector, are described below.
Parameters in the Inspector
Movement: The Movement parameter contains controls to begin the tracking analysis
and to specify the direction of the analysis.
 Analyze: Click the Analyze button to begin the motion tracking analysis. Once
Analyze is clicked, a status window appears that 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.