Adobe 65021048 User Manual page 135

ADOBE PREMIERE PRO CS3 129
User Guide
Blend frames for smooth motion
Motion in a clip may appear jerky when you change the speed of a clip, or output to a different frame rate. Make
sure that frame blending is on to create new interpolated frames that smooth the motion. Frame blending is turned
on by default.
❖
Choose Clip > Video Options > Frame Blend.
About the Time Remapping effect
You can speed up, slow down, play backward, or freeze video portions of a clip using the Time Remapping effect.
Using speed keyframes, you can change speed numerous times within the same clip. For example, in a clip of a man
walking, you can show him moving forward quickly, slowing suddenly, stopping mid-step, and even walking
backward, before resuming his forward motion. Unlike Clip Speed/Duration which applies a constant speed across
the entire clip, Time Remapping allows you to vary the speed throughout the clip, and to ease in or ease out speed
changes.
You can apply time remapping only to instances of clips in the Timeline, not to master clips.
When you vary the speed of a clip with linked audio and video, the audio remains linked to the video, but remains
at 100% speed, regardless of changes to the video speed. It won't remain synchronized.
You create variable speed changes by applying speed keyframes, either in the Effect Controls panel or in a clip
instance in a video track of the Timeline. Applying speed keyframes in either location is similar to keyframing
Motion, Opacity or any other keyframe effect, with one notable difference: a speed keyframe can be split to create a
transition between two different playback speeds. When first applied to a track item, any change in playback speed
on either side of a speed keyframe is instantaneous at that frame. When the speed keyframe is dragged apart and
spread out beyond one frame, the halves form a speed change transition. Here, you can apply linear or smooth
curves to ease in or ease out the change between playback speeds. For a video about time remapping, see
www.adobe.com/go/vid0235.
Footage is usually displayed at constant speed in one direction.
April 1, 2008