< Previous | Contents | Next >
Once an offset for a pattern is set, you can connect other positional controls to the Tracker’s Offset menu using the Connect To > Tracker: Offset Position option in the control’s contextual menu. The path created during the track remains fixed to the center of the pattern.
Stabilizing with the Tracker Node
When a Tracker node is set to Match Move in the Operations tab, it is capable of a variety of functions. Applying the motion from the background clip to the foreground clip is the obvious functionality.
However, the Match Move operation is also used for stabilizing footage to to either completely remove motion from the scene or smooth existing motion.
Here are some common scenarios for stabilization that are handled when the Tracker is set to Match Move.
— A sequence that should be steady has vibrations or undesirable movement.
— A sequence that requires a smooth camera move suffers from jarring.
The Tracker Operation tab Match Move set to BG Only for stabilization
Stabilization Using the Tracker Match Move Mode
Stabilizing motion completely removes the appearance of motion from the image. The motion from frame to frame is calculated, and the contents of the frame are transformed to return the image to a reference position. This position can be either the start or end of the sequence or a manually selected frame from the sequence.
Stabilization can correct for position with as little as one pattern. Two or more patterns are required to correct for rotation or scaling within the image.
When the Operation menu is set to Match Move, choosing BG only from the Merge operation menu stabilizes the background (yellow input) clip. Only the controls that are applicable for stabilization operations will appear in the Operation tab.
Several of the stabilization controls are always available, collected under the Match Move Settings disclosure button. These controls are available at all times because the Steady and Unsteady positions of a tracker are always published. This makes them available for connection by other controls, even when the Tracker’s operation is not set to match moving.
The Match Move settings