User`s guide

Chapter 9 Motion Tracking

492

To use the Motion Tracker:

1. Load the media to track into the Source track and set up the timeline to produce the

desired effect. The hierarchy of shape and filter tracks in the timeline, and the location

of the Motion Tracker filter track in this hierarchy, determines how the tracker data is

applied—see “Creating Motion Tracker Effects and Applying Tracker Data” on

page 493

2. Click the Preview Monitor icon in the Motion Tracker filter track to open a Preview

window for the track. You can then use the onscreen controls or controls in the Motion

Tracker’s Search/Target tab in the Controls window, to define the region to track—see

“Analyzing Motion” on page 496.

Also see “Search/Target Tab (Motion Tracker)” on page 502

You can only adjust the regions in the Motion Tracker filter track’s Preview window. The

Source track does not display the region controls.

3. Setup the regions, using the parameters in the Motion Tracker’s Search/Target and

Advanced tabs in the Controls window. You can apply up to four independent trackers,

control how data from the various trackers is averaged to produce the final data, and

otherwise fine-tune the process to produce a good track—see “Analyzing Motion” on

page 496.

Also see “Working with the Corner Pin Tracker” on page 497 and “Advanced Tab

(Motion Tracker)” on page 505.

4. If necessary, you can manually correct any errors in the generated data—see “Manually

Correcting Errors” on page 497 for more information.

5. Apply the Tracker data using the Motion Tracker’s Apply tab—see “Creating Motion

Tracker Effects and Applying Tracker Data” on page 493.

Also see Apply Tab (Motion Tracker) on page 507.

Using Multiple Trackers

You can use multiple trackers to average the results for more precise tracking or to track

irregularly shaped objects. For example, if you are tracking an animated 3D object, like a

bird or a car, you may want to use an average of several trackers. You can also use multiple

trackers or add keyframes if your primary tracker is obscured in one or more frames. For

information on using Multiple Trackers, see “Search/Target Tab (Motion Tracker)” on page

502.