2011

About Timing Curves
Time warps are created by modifying the timing of the source footage or by
changing its playback speed. When you change a clip's timing, you are
essentially changing the time that it takes for a clip to reach a given frame.
For example, in a 100-frame clip, you can adjust the timing so that only the
50th source frame is reached by the end of the clip's 100 frames. This halves
the clip's playback rate. A negative playback rate can be achieved by reversing
a clip's timing curve (by changing the value at the last keyframe to the value
of the first keyframe and the other way around). In the Timing Animation
editor, a steeper timing curve results in a faster playback rate.
Adjusting the clip's speed has different results. Setting the speed to 2.0 doubles
the playback rate. A speed value of .5 plays the clip at half speed (or in slow
motion). A negative speed value corresponds to playing the clip in reverse
(where a -1.0 speed value creates a clip that plays back at the normal rate, but
backward).
NOTE To avoid indexing black frames, set clip link Repeat parameter to Loop.
Speed and time curve editors are identical to animation curve editors and have
most of the same controls.
When in Warp interpolation mode, the Retimer has the following parameters:
To:Use:
Implement “a frame is a frame” timing. You can control the
mapping of output frames to input frames using the Animation
Frames
692 | Chapter 28 Time Tools