Apple Motion 4 - Manual (Page 1313)

• Use Existing Keyframes: Use this option if you have manually created track position
keyframes to guide the tracker. After manually adding keyframes, return to the start
frame and start the tracking analysis. If the tracker has difficulty locating the track
pattern, the manually created tracking keyframes are referenced to guide the tracker.
• Color: Click or Control-click the color well to set a new color for the onscreen tracker.
You can also click the eyedropper and select a color in the Canvas. The default tracker
color is red. When a tracker is selected, its center point is yellow and the border of its
magnified inset is the color set in the color well. To adjust the individual color channels,
including the tracker’s opacity, click the disclosure triangle.
Rotation-Scale (pop-up menu): When the Match Move behavior references another
behavior, such as Analyze Motion, the Rotation-Scale tracker becomes the Rotation-Scale
pop-up menu. The tracker’s subparameters are replaced with a pop-up menu that allows
you to select the tracker from the referenced behavior that you want to apply as the
Rotation-Scale tracker. By default, Track 2 is applied as the Scale-Rotation tracker. If there
is only one tracker in the referenced behavior, Track 1 is applied to both Anchor and
Rotation-Scale.
Anchor (pop-up menu): When the Match Move behavior references another behavior,
such as Analyze Motion, the Anchor tracker checkbox becomes the Anchor tracker. The
tracker’s subparameters are replaced with a pop-up menu that allows you to select the
tracker from the referenced behavior that you want to apply as the Anchor tracker. By
default, Track 1 from the referenced behavior is applied as the Anchor tracker. If there is
only one tracker in the referenced behavior, Track 1 is applied to both Anchor and
Rotation-Scale.
When Match Move
references another
behavior, the trackers
from the referenced
behavior are applied to
the Match Move trackers.
Top Left: Available when four-point tracking is enabled (Four Corners is chosen from the
Type pop-up menu) and the Match Move behavior references another behavior (such as
Analyze Motion), this pop-up menu allows you to select the tracker from the referenced
behavior that you want to apply as the top left tracker.
Top Right: Available when four-point tracking is enabled (Four Corners is chosen from
the Type pop-up menu) and the Match Move behavior references another behavior (such
as Analyze Motion), this pop-up menu allows you to select the tracker from the referenced
behavior that you want to apply as the top right tracker.
1313 Chapter 19 Motion Tracking