Adobe 12040118 - After Effects Standard, Tutorial

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6. Move the remap-time marker on the upper time ruler to the frame you want to display at the time indicated on the lower time ruler:
To move the preceding portion of the layer forward, set the remap-time marker to a later time than the current-time indicator.
To move the preceding portion of the layer backward, set the remap-time marker to an earlier time than the current-time indicator.
To freeze a frame, set the remap-time marker to the frame you want frozen. Then, move the current-time indicator (lower ruler) to the
last point in time where the frame will appear frozen and move the remap-time marker again to the frame you want frozen.
Time-remap audio pitch
The speed graph of the Time Remap property directly relates to the pitch of an audio file. By making subtle changes to the speed graph, you can
create a variety of interesting effects. To avoid screeching audio, you may want to keep the Speed value below 200%. When the speed is too
high, use the Levels controls, located under the Audio property, to control the volume.
You may hear clicks at the beginning and end of an audio (or an audio and video) layer after setting new In and Out points in the Time Remap
graph. Use the Levels controls to remove these clicks.
Change the pitch of an audio layer
1. In a Composition or Timeline panel, select the layer you want to remap.
2. Choose Layer > Time > Enable Time Remapping.
3. Click the Graph Editor button in the Timeline panel to display the Graph Editor, if necessary.
4. Click the Choose Graph Type And Options button at the bottom of the Graph Editor and choose Edit Speed Graph.
5. Move the current-time indicator to the frame where you want change to begin, and then click the Add A Keyframe button.
6. On the speed graph below the keyframe, drag a marker, watching the Speed value as you drag.
To lower the pitch, drag the speed graph marker down.
To increase the pitch, drag the speed graph marker up.
Remove clicks from new In and Out points
1. If necessary, choose panel > Audio.
2. In the Timeline panel, select the audio (or audio and video) layer to which you applied time-remapping.
3. Expand the layer outline to display the Audio property and then the Audio Levels property.
4. Move the current-time indicator to the new In point and choose Animation > Add Audio Levels Keyframe.
5. In the Audio panel, change the decibel value to 0.0.
6. Press the Page Up key on your keyboard to move the current-time indicator to the previous frame.
7. In the Audio panel, change the decibel level to -96.0.
8. Move the current time to the new Out point and set the decibel level to 0.
9. Press the Page Down key to move the current-time indicator to the next frame.
10. In the Audio panel, change the decibel level to -96.0.
You can change the decibel Slider Minimum value in the Audio Options dialog box, which is available from the Audio panel menu.
Online resources for time-remapping
Aharon Rabinowitz provides a tutorial on the Creative COW website that shows how to use time-remapping to do lip-synching. This same basic
concept can be used for many kinds of character animation.
Robert Powers provides a video tutorial on the Slippery Rock NYC website that demonstrates how to use time-remapping to animate a character
to synchronize mouth movement with audio (lip synch).
Charles Bordenave (nab) provides a script on the After Effects Scripts website that automatically modulates time-remapping on a layer according
to audio amplitude.
Sam Morris provides a tutorial that introduces time-remapping on his website .
Andrew Kramer provides a video tutorial on his Video Copilot website that demonstrates time-stretching, time-remapping, and frame blending.
Frame blending
When you time-stretch or time-remap a layer to a slower frame rate or to a rate lower than the frame rate of its composition, movement can
appear jerky. This jerky appearance results because the layer now has fewer frames per second than the composition. Likewise, the same jerky
appearance can occur when you time-stretch or time-remap a layer to a frame rate that is faster than the frame rate of its composition. To create
smoother motion when you slow down or speed up a layer, use frame blending. Don’t apply frame blending unless the video of a layer has been
re-timed—that is, the video is playing at a different frame rate than the frame rate of the source video.
After Effects provides two types of frame blending: Frame Mix and Pixel Motion. Frame Mix takes less time to render, but Pixel Motion provides
much better results, especially for footage that has been drastically slowed down.