Apple Motion 4 - Manual (Page 1251)

• Match Move: This behavior is used to “match” a foreground element to a background
element so that they appear locked together. This effect can be achieved in three
different ways:
• You can match a foreground element to a background element using one-point
(position), two-point (position, scale, or rotation), or four-point (corner-pinning)
tracking. Unlike other tracking behaviors, Match Move can perform the compositing
operation, or you can perform further modifications (blur, color corrections, and so
on) before you create the final composite.
• You can reference a track recorded in another tracking behavior. A referenced track
is chosen from the tracking behaviors pop-up menu, located in the behavior’s HUD
or Inspector.
• You can quickly apply the animation data of an object, such as animation created
by behaviors or keyframes, to another element in the project without analyzing the
source object. Drag the animated source object to the Source well in the behavior’s
HUD or Inspector to apply its movement to the destination object.
Note: The Match Move behavior can be applied to nearly any object type.
• Stabilize: This behavior removes unwanted motion in a clip, such as camera jitter. The
stabilization can be applied to the horizontal or vertical movement in the clip, or to a
combination of horizontal and vertical movement. This effect can be achieved in one
of three ways:
• Motion can analyze and automatically stabilize a clip without the use of any trackers.
In this case, the Stabilize behavior evaluates the entire frame of a clip using motion
analysis to record the movement of the camera. This behavior offers two ways to
use this recorded data: clip smoothing, which eliminates unwanted jitter while
maintaining the general motion of the camera; and clip locking, which stabilizes a
subject. This behavior can analyze and affect position, scale, and rotation.
• In addition to full-frame motion analysis, you have the option to manually add trackers
for one-point (position) tracking or two-point (position, scaling, or rotation) tracking.
When you add manual trackers to the Stabilize behavior, Motion stabilizes the clip
using data from the trackers rather than from an automatic motion analysis. When
using this method, the tracker moves the entire frame so that the track point falls in
the same spot in each subsequent frame.
• You can load tracks recorded in another Stabilize behavior. To load another track,
choose a track from the tracking behaviors pop-up menu, located in the tracking
behavior HUD or Inspector.
Note: The Stabilize behavior can only be applied to footage (a QuickTime movie or an
image sequence).
1251 Chapter 19 Motion Tracking