Apple Motion 3 - Manual (Page 454)

454 Chapter 5 Using Behaviors
Frame Range: A slider that defines the range from which the random frames are
chosen, based around the current frame. The default value is 10 frames.
Duration: A slider that sets the duration of the sequence of random frames. The
default value is 1, which means 1 random frame is inserted at a time. When Duration is
set to 30, for example, 30-frame sequences (chosen from the Frame Range) are
randomly inserted. The Duration value overrides the Random Frame count (so that a
new random frame does not interrupt the sequence).
Random Seed: A button that lets you pick a new random seed number. This number is
used to randomly generate new values, based on the other parameters of this behavior.
Hold Frame
The Hold Frame behavior holds the frame at the behavior’s In point for the duration of
the behavior. The clip continues playing normally after the behavior’s Out point. For
example, if the Hold Frame behavior begins at frame 60 and ends at frame 300, the clip
plays normally until frame 59, frame 60 is held for 240 frames, and then normal
playback resumes—frame 61 of the clip—at frame 301.
The Hold behavior is always applied at the current frame, rather than at the start of the
object.
HUD Control
The HUD contains the Offset parameter.
Parameters in the Inspector
Offset: A slider that sets the offset for the hold frame. When set to 0 (the default), the
frame at the start of the behavior is the hold frame. When set to 60, however, the frame
at the start of the behavior (the hold frame) is frame 60 plus the start frame. This
parameter is measured in frames.
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Tip: Flickering may occur if the Hold Frame behavior is applied to interlaced footage.
To avoid this, ensure that Field Order is properly set in the Inspector. To change field
order, select the footage in the Media tab of the Project pane, show the Media tab in
the Inspector, then choose a field order option from the Field Order pop-up menu.
Loop
This behavior loops a segment of the clip within the duration of the behavior. The
loop’s starting frame is derived from the start frame of the behavior. For example, if the
behavior is applied at the start of a clip, and Loop Duration is set to 30, the first 30
frames of the clip loop repeatedly until the end of the behavior. At the end of the
behavior, normal playback resumes from the frame at the end of the loop duration.
HUD Control
The HUD contains the Loop Duration parameter.