Apple Motion 5.1.1 - Manual (Page 979)

Chapter 22 Motion tracking 979
When the tracking analysis begins, a progress window opens and track points appear in
the Canvas. The track points are the post-analysis motion path (the path that looks like a
string of pearls) that appears in the Canvas. The track point at the current playhead position
is emphasized.
Note: Track points in the Canvas correspond to the tracking keyframes that appear in the
Keyframe Editor.
Position the tracker
1 Drag the tracker in the Canvas.
As you drag, the area around the tracker in the Canvas is magnified and tracker coordinates
appear in an info window. The magnified inset is a visual aid for positioning the tracker and does
not represent a search area or region.
The magnified inset also appears as a Tracker Preview area in the Behaviors Inspector.
2 Fine-tune the tracker position by doing one of the following:
•
Drag in the Tracker Preview area.
As you drag in the preview area, the tracker in the Canvas also updates.
Drag anywhere within
the preview area
If you use rotated footage, the rotation is not reflected in the Tracker Preview in the Inspector.
The rotation is reflected in the magnified visual aid in the Canvas.
•
Click the track’s disclosure triangle at the bottom of the Behaviors Inspector, then use the
Position controls to numerically adjust the tracker’s position.
Note: You can Option-drag in the Tracker Preview area to override the pattern search size.
Option–drag left to reduce the size of the search pattern in the Canvas, and Option–drag right
to increase the pattern search size. Alternatively, you can modify the search size using the
Track Size slider in the track parameters.
67% resize factor