Using keyframe animation
Keyframe animation is a technique that computer artists use to quickly make complex animated sequences. Instead of drawing every frame of a title scrolling in from top to bottom by hand, an animator simply has to set a starting and ending position for the animation and let the computer interpolate the intermediate frames. The animation pictured on the right has three keyframes: a starting, middle, and ending keyframe. More complex animations use more keyframes.
While keyframing motion may be the most obvious use for keyframe animations, just about any parameter of an effect can be animated with keyframes. Keyframe animation techniques are used in many areas, including transition effects, video effects, event panning and cropping, generated media, and track motion. You can animate color, brightness, transparency, motion, size, perspective, and many other parameters with keyframes.
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These three frames show the progression of a title across three keyframes.
Understanding the keyframe controller
The keyframe controller appears at the bottom of the Video FX window (used for transitions, effects, and generated media), the Track Motion window, and the Event Pan/Crop window.
Cursor position Keyframes
Each effect
in a video effects chain can have its own keyframes.
Sync Cursor |
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FirstCreate
Previous Last
Next
The cursor position is marked by a flashing line on the controller. This position can also be automatically updated on the timeline, with the Video Preview window also updating in real time to reflect changes. Click the Sync Cursor button ( 
) on the keyframe controller to sync the keyframe cursor with the timeline cursor.
CHP. 15 | ADDING VIDEO TRANSITIONS AND MOTION |