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Adjusting multiple layer durations

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David TippellAdjusting multiple layer durations
by on Jan 11, 2017 at 10:56:45 pm

I'm creating a kind of slideshow of still images, using effects and expressions for the transitions.

I've imported each still at a 5-second duration and sequenced the layers when bringing them into a new comp, so each is shown before transitioning to the next. Simple, right?

Now, what if I want to (and I do) extend the duration to, for example, 8 seconds?
Is there a way to apply this change to every layer and ripple the following layers down the timeline, just like a regular ripple edit, and at the same time extend the total comp duration, without having to go through each one-by-one?

I could of course just create this in Premiere, but I'm trying to keep the particular effects and transitions I've created in After Effects.

Thanks guys!

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Dave LaRondeRe: Adjusting multiple layer durations
by on Jan 12, 2017 at 5:32:55 pm

If you used a simple dissolve (aka opacity change), this would be a no-brainer. But you animated your own transitions, requiring a different technique.

You'll have to save your custom transition as an Animation Preset for later use. Then make a new comp, add your layers, do that Auto Sequence Layers thing again, specify the amount of overlap, and apply the animation preset you made earlier for the transitions.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA

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Blaise DourosRe: Adjusting multiple layer durations
by on Jan 13, 2017 at 6:40:23 pm

Precompose your comp that has all your photos and transitions in it, right-click the new pre-comp, and apply Time Stretch. Enter the new total duration. Render. Kaboom. Your render time will be slightly increased, but it will take you less time than rebuilding the whole comp.

Note that this only really works when you're dealing with keyframes and animations--AE is smart enough to tween the keyframes--but if you do this when there's actual video in the pre-comp, you'll end up with the usual framerate stutter issues that happen when you slow video down.

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