Apple Motion 4 - Manual (Page 1291)

This example uses 5, which means that 5 track points centered on the currently evaluated
point are used to compute the current point’s new, smoothed value. This is a standard
Gaussian (bell-curve type) filter. In other words, if you leave it at 5, when the value of
frame 12 is computed, frames 10, 11, 12, 13, and 14 are considered. If set to 3, it uses
frames 11, 12, and 13. The larger the Smoothing Factor, the more points are considered
(and thus more calculations done) for every point in the curve.
2 Set the values in the Reduce Keyframes dialog.
As you adjust the sliders or value sliders in the dialog, the curve is modified in the Keyframe
Editor.
After the curve is
simplified, the curve
contains fewer keyframes
and is smoothed.
3 Click OK.
Averaging a Track Curve
Another possible smoothing option is to apply the Average parameter behavior to a track
curve in the Keyframe Editor. This behavior smoothes the transition from one keyframe
value to another. Averaged motion moves more fluidly.
To apply an Average parameter behavior to a track curve
µ
In the parameter list of the Keyframe Editor, control-click the parameter name, then
choose Average from the shortcut menu.
The track is averaged, indicated by the simplified curve that appears behind the keyframes
in the Keyframe Editor.
For more information on using the Average parameter behavior, see Average .
Converting Tracks to Keyframes
Tracking data that is recorded or referenced by the Match Move, Stabilize, or Unstabilize
behavior can be “baked” into keyframes on the transformed object. The tracking keyframes
are applied to the tracked object and the behavior is deleted from the project. You can
then modify the animation curves in the Keyframe Editor.
Because the Analyze Motion behavior does not transform the image, analyzed tracks
cannot be converted into keyframes. However, a Match Move or Stabilize behavior that
references data from an Analyze Motion behavior can be converted into keyframes.
1291 Chapter 19 Motion Tracking