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To add an additional tracker, click
the Add button in the Inspector.
Multiple patterns are useful when stabilizing, match moving, or removing perspective from a
clip. They also help to keep the Node Editor from becoming cluttered by collecting into a single
node what would otherwise require several nodes.
Working in the Tracker list:
To select a tracker: Click the name of the Tracker you want to select.
To rename a tracker: You can rename trackers to make it easier to reference them
later. For example, if you’re tracking a car door handle, you can name the Tracker “Car
Handle” so it’s easy to find later. To do so, just double-click the default name of the
Tracker in the Tracker list, type a new one, and press Return.
To delete a tracker: Select a tracker and click the Delete button.
To disable, suspend, or re-enable trackers: Click the checkbox to the left of each
tracker’s name in the Tracker List. It’s a three-way toggle that switches between
Enabled, Suspended, and Disabled.
Enabled: An Enabled tracker will re-track its pattern every time the track is performed.
Its path data is available for use by other nodes, and the data is available for
stabilization and corner positioning.
Suspended: When the checkbox appears gray, it is Suspended. In this state, it does
not re-track its pattern when the track is performed. The data is locked to prevent
additional changes, but the data from the path is still available for other nodes. The data
is also available for advanced tracking modes like stabilization and corner positioning.
Disabled: A Disabled tracker does not create a path when tracking is performed.
Its data is not available to other nodes or for advanced tracking operations like
stabilization and corner positioning.
Position the Pattern Boxes
A pattern is the region of pixels that are targeted for tracking within an image using a pattern
box. The pattern box is defined in the viewer by a rectangle when a tracker is active. A single
Tracker node can have many pattern boxes, each targeting different patterns. Each tracked
pattern will produce its own motion path.
Clicking any part of a tracker’s onscreen controls will select it. Selected pattern boxes are red,
while deselected pattern boxes are green.
Chapter – 73 Using the Tracker Node 1495