Adobe After Effects CC Classroom in a Book (2019 Release), First Edition

(Barré) #1

  1. Make any adjustments you need to make. For example, if the leaves protrude from the
    flowerpot as they rise with the stem, use the Selection tool to adjust their position or
    rotation, or animate the leaves’ opacity so that they are visible only as they emerge from the
    pot.


Tip
To rotate a leaf from its tip, use the Pan Behind tool to move its anchor point to the
tip.


  1. Choose File > Save to save the final project.


Animating layers to match audio


You can time animation to match the beat of an audio file. First you need to create
keyframes from the amplitude of the audio (which determines loudness), and then sync the
animation to those values.
To create keyframes from audio amplitude, right-click or Control-click the audio layer
in the Timeline panel, and choose Keyframe Assistant > Convert Audio to Keyframes.
After Effects adds the Audio Amplitude layer. The new layer is a null object layer,
meaning it has no size or shape and won’t appear in a final render. After Effects
creates keyframes that specify the amplitude of the audio file in each frame of the
layer.
To sync an animated property with the audio amplitude, select the Audio Amplitude
layer, and press E to display the effects properties for the layer. Expand the channel
you want to use. Then Alt-click (Windows) or Option-click (macOS) the stopwatch for
the property whose animation you want to sync with to add an expression; with the
expression selected in the time ruler, click the pick whip icon ( ) on the Expression:
Free download pdf