Working with keyframe interpolation
The Motion effect moves clips around the screen over a period of time. Adobe
Premiere Pro offers keyframe interpolation methods that suit both aspects of that
motion: spatial and temporal.
Spatial
interpolation refers to the motion path—where the clip appears onscreen.
Temporal
interpolation refers to changes in velocity.
In this exercise, you will use an interpolation method called Ease In and Ease Out.
Using Ease In and Ease Out is a quick way to set a Bezier curve on a keyframe with-
out manually dragging the keyframe handles.
1
Continue with the Practice sequence where you left off.
2
To adjust the interpolation of scale, position, and rotation all at once, drag a
selection box around the second set of keyframes, as shown here. The selected
keyframes will be blue.
#
Note:
When you
save a preset, you can
choose for the preset
to scale the length of
any clip or anchor to a
specific In or Out point.
In many cases, setting
the effect to scale to
the length of the clip is
most effective.
ptg
ADOBE PREMIERE PRO CS5 CLASSROOM IN A BOOK
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3
Right-click any of the selected keyframes, and choose Ease In from the
Temporal Interpolation menu.
4
Using the same technique, select the third set of keyframes, and choose Ease
Out from the Temporal Interpolation menu.
5
Expand the Position, Scale, and Rotation parameters to display their graphs.
You will see that choosing the Ease options changed the graph to a curve.
6
Play the clip, and note the subtle change to how motion starts and stops on the
keyframes you changed.
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