Apple Color 1.0 User Manual download pdf (Page 290)

290 Chapter 14 Keyframing

Keyframe Interpolation

The interpolation method that a keyframe is set to determines how settings are

animated from one keyframe to the next. There are three possible types of

interpolation:

Â Smooth: Smooth keyframes begin the transition to the next keyframed state slowly,

reaching full speed in the middle of the transition and then slowing down to a stop

at the next keyframe. This “easing” from one keyframe to the next creates transitions

between color corrections, animated Color FX node parameters, Pan & Scan settings,

and animated user shapes that look and move smoothly and naturally. However, if

you have more than two keyframes, your effect will seem to pause for one frame as

the playhead passes over each keyframe, which may or may not be desirable.

Â Linear: Linear keyframes make a steady transition from one keyframed state to the

next, with no acceleration and no slowing down. If you use linear keyframes to

animate an effect that happens somewhere in the middle of a shot, the animated

effect may appear to begin and end somewhat abruptly. On the other hand, if you

are keyframing an animated effect that begins at the first frame and ends at the last

frame of the shot, the appearance will be of a consistent rate of change.

Â Constant: Constant keyframes perform no interpolation whatsoever. All effects

change abruptly to the next keyframed state whenever the playhead reaches the

next constant keyframe. Constant keyframes are useful when you want an effect to

change suddenly to another state, such as changing the contrast to simulate a

lightning strike flashing through the window.

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Apple Color 1.0 User Manual Page 290