Apple Motion 4 - Manual (Page 492)

• Offset Frame: Allows you to offset the start frame of the replay. For example, if the
behavior starts at frame 60 of the clip, and Start Frame is set to 30, when playback
reaches frame 60, the clip starts playback at frame 90. If Start Frame is set to –30, the
clip starts playback over from frame 30.
Start Time: A slider that sets the start frame from which to replay the clip. The default is
frame 1.
HUD Controls
The HUD contains the Start From and Start Time parameters.
Reverse
This behavior plays the clip or image sequence in reverse.
Parameters in the Inspector
There are no parameters for this behavior.
HUD Controls
There are no parameters for this behavior.
Reverse Loop
This behavior loops a segment of the clip in reverse within the duration of the behavior.
If Loop Duration is set to 30 and the behavior begins at frame 1, frames 1–30 are played
in reverse, then frames 31–60 are played in reverse, frames 61–90 are played in reverse,
and so on.
Tip: To achieve a nice stutter effect, set Loop Duration to 2.
Parameters in the Inspector
Loop Duration: A slider that sets the duration of the looped frames to be played in
reverse. The default value is 30 frames.
HUD Controls
The HUD contains the Loop Duration parameter.
Scrub
Like the Scrub filter, the Scrub behavior moves a virtual playhead around a clip, allowing
you to change the timing of the clip without moving it in the Timeline. Additionally, the
Scrub behavior allows you to animate the offset parameter using keyframes or parameter
behaviors, often with interesting results. Try applying the Oscillate behavior to the Frame
offset, with the Offset From parameter set to Current Frame.
Note: You can also apply parameter behaviors to the Retime Value parameter in the
Timing controls for the image itself. The Timing controls are located in the Properties tab.
Time Remap must be set to Variable Speed in order to access the Retime Value parameter.
Important: Scrub does not affect clip audio.
492 Chapter 9 Using Behaviors