5.5

1131Motion User Guide
Important: When applying the Match Move behavior to a group, make sure the footage
being analyzed resides outside of the group being tracked.
A single onscreen tracker (a red crosshair in a circle) is added to the canvas. Because
the default Match Move tracker records position data, it’s known as an anchor tracker.
3. Optional: To track more complex motion (such as a rotating element or an element with
four corners), do one of the following:
• Add a second tracker to track additional rotation and scale data: In the Behaviors
Inspector, select the Rotation-Scale checkbox (under the Anchor checkbox). See
Two-point tracking in Motion.
• Add four trackers to track an element with four corners: In the Behaviors Inspector,
click the Type pop-up menu, choose Four Corners, then proceed to step 3 of Use
four-corner tracking to pin a foreground object to a background element.
4. Move the playhead to the frame where you want the track analysis to begin.
Note: You can specify a portion of a clip to be analyzed. See Use a range of frames for
analysis in Motion.
5. In the canvas, drag the tracker (or trackers) to the area (or areas) you want to track.
As you drag the tracker in the canvas, the region around the tracker becomes magnified
to help you find a suitable reference pattern.
6. In the Behaviors Inspector or HUD, click the Analyze button.
The behavior analyzes the movement of the reference pattern in the video clip, then
matches the movement of the foreground object to it.
Match move using animation data from keyframes or behaviors
Because objects animated with keyframes or behaviors already contain motion data, you
can apply that data to a destination object using the Match Move behavior without having
to perform a tracking analysis.
The following simple example uses a “magic wand” image (an ellipse shape) animated
using the Spin behavior, and a Magic Dust particle emitter (available in the Library). The
Match Move behavior extracts the animation of the magic wand and applies it to the Magic
Dust particle emitter to create the illusion of sparkles flying off the tip of the spinning
wand.
1. In Motion, make sure the destination object (the particle emitter) is above the source
object (the magic wand shape) in the Layers list.
2. In the Layers list, select the destination object, click Behaviors in the toolbar, then
choose Motion Tracking > Match Move.