Apple Motion 4 - Manual (Page 1295)

6 In the Behaviors tab of the Inspector, click the disclosure triangle for the track you have
manually adjusted, then choose Use Existing Keyframes from the Fail Behavior pop-up
menu.
7 Turn off the Record button (press A).
8 Go to the first frame of the clip, then click the Analyze button in the behavior HUD or
Inspector.
Important: Even though keyframes have been created, you must analyze the footage in
order to obtain the tracking data.
To manually coax a track without enabling Record
1 Apply a Motion Tracking behavior to the clip.
2 In the Canvas, position the tracker at the reference point you want to track.
3 Choose Object > Add Position Keyframe.
This command is available for the Analyze Motion, Match Move, Stabilize (with manual
trackers), Track Points (in the Shape behaviors category), and Track (in the Parameter
behaviors category) behaviors.
Note: Keyframes cannot be created for automatically stabilized footage. Use the Track
Region option for adjusting automatic stabilization, or convert the stabilized footage to
keyframes. For more information on the Track Region parameter, see
Adjusting the
Stabilize Behavior’s Track Region . For more information on converting tracking data to
keyframes, see Converting Tracks to Keyframes .
4 Navigate to the next frame at which you want to create a keyframe.
5 Repeat steps 2 and 3 until you’ve completed the track.
6 In the Behaviors tab of the Inspector, click the disclosure triangle for the track you have
manually adjusted, then choose Use Existing Keyframes from the Fail Behavior pop-up
menu.
7 Go to the first frame of the clip, then click the Analyze button in the behavior HUD or
Inspector.
Note: You can also use the Tracker Preview in the Behaviors tab of the Inspector to
reposition trackers in the Canvas.
Important: Even though keyframes have been created, you must analyze the footage in
order to obtain the tracking data.
Tracking Images with Perspective, Scale, or Rotational Shifts
For images with significant change in size and angle, you can try a few different strategies.
First, try using a larger search area. You can increase Motion’s default tracking search size
using the Search Size parameter in the Behaviors tab of the Inspector. Click the track’s
disclosure triangle to display the Search Size parameter.
1295 Chapter 19 Motion Tracking