7.1

771
Linear Timewarp
Linear Timewarp
Use Linear Timewarp to quickly and simply generate linear speed effects in video clips and animations,
such as slow motion, fast motion, fit to fill, reverse playback, freezes, strobe effects, etc. Add Linear Time-
warp is a function in a clip’s Timeline shortcut menu.
“Linear” means: the playback speed does not change during playback, i.e., remains constant.
Dynamic modifications of speed and direction using Key Frames are best achieved with the Timewarp
Editor (page 776). However, for a quick fit to fill operation, for instance, the Linear Timewarp function is
highly recommended.
Linear Timewarp video effects, within certain limits, are played back in real time. See “Timewarp and
Realtime” on page 774 in this chapter.
Audio is affected as well, though the pitch stays the same (time stretching feature), and plays in real time.
Add Linear Timewarp page 771
Parameters page 772
Video and audio computation page 773
Timewarp and realtime page 774
Generating a freeze (still) page 775
Add Linear Timewarp /Edit Linear Timewarp
Add Linear Timewarp can be found in the shortcut menu of any video or animation clip on the Timeline.
If a clip has already been edited with Linear Timewarp, open the shortcut menu by right-clicking the col-
ored broken line at the bottom of the clip, and call the function (Linear Timewarp or dynamic Timewarp
Editor).
TIP: Apply the Timewarp effect first, then all other effects. Also make sure Timewarp is fully rendered
before
editing the other effects.
Plus, a Timewarp discards a clip’s alpha plane so that already applied key effects, for example, would be
lost.
If a Timewarp effect, be it dynamic or linear, is applied to a clip to which already one or more effects have
been applied, the following happens:
The effect line at the clip’s top as well as the effect icon disappear from the clip. Instead the black and red
Timewarp line appear at the bottom of the clip.
This behavior is mandated by technical reasons. However, it does not mean that the previously applied
effect(s) has (have) been cleared or deleted from the clip. They become visible once again when the
Timewarp effect is taken from the clip.