User Guide

Working with keyframe interpolation
You can change the way an effect is rendered spatially and temporally by using keyframe
interpolation methods. Interpolation methods can vary with each keyframe so that a
property can accelerate from the starting keyframe and decelerate into the next keyframe.
Interpolation methods are particularly useful for changing the speed of motion for an
animated clip (see “Manipulating a clip in the Program view” on page 252).
The keyframe’s appearance indicates the type of interpolation it uses between keyframes.
Shading denotes the first and last keyframes and indicates that no keyframes are adjacent
to that side, and no interpolated values. By default, keyframes use the Normal keyframe
interpolation method, which interpolates the effect property evenly across time. While
you can choose the In or Out interpolation method for a keyframe, the rate of change
between keyframes may determine the interpolation method for neighboring keyframes.
Setting keyframe interpolation
When the left side of a keyframe is convex, the keyframe is set to Easy In, or the previous
keyframe is set to Slow Out; both indicate that the value changes less rapidly as it
approaches the convex keyframe. When the right side is convex, values use Easy Curve
Out
or Slow Out and change more slowly immediately after the keyframe than they do as the
current time approaches the next keyframe. Conversely, when one or both sides of a
keyframe is concave, the values change more rapidly when they approach or exit the
keyframe. When either side of a keyframe appears square, the values don’t interpolate but
rather stay the same until the next keyframe.
Using Help | Contents | Index Back 251
Adobe Premiere Pro Help Applying Effects
Using Help | Contents | Index Back 251
When you change the interpolation method for a keyframe, you may not notice a
significant
difference if the rate of change is low between that keyframe and neighboring
keyframes. For more dramatic results, decrease distance between keyframes and
increase
the value differences.
Note: Although interpolation methods can vary the rate at which a property changes
between keyframes, they cannot change the actual duration between keyframes.
Duration is determined by the time (or distance in the time ruler) between keyframes.
Keyframe interpolation methods
A. Normal In/Out B. Fast Out C. Fast In D. Slow In E. Slow Out F. Hold Out G. Hold In
To change a keyframe’s interpolation method:
In either the Effect Controls window or the Timeline window, right-click a keyframe and
choose an interpolation method. To choose an interpolation method for the other half of
the keyframe, right-click the keyframe a second time.
Note: You can choose only the following interpolation methods for starting keyframes:
Normal Out, Fast Out, Slow Out, Easy Curve Out, and Hold Out. Ending keyframes are
limited to Normal In, Fast In, Slow In, Easy Curve In, and Hold In.
Adding keyframes using interpolated values
You can add a keyframe by using the Add/Delete Keyframe button in the keyframe
navigator. When you do, the keyframe uses the previously interpolated property value for
that frame.
To add a keyframe with an interpolated value:
1 In the Effect Controls window, select the clip you want to animate.
2 Display the property for which you want to add a keyframe.