Things You'll Need:
- Computer with Adobe After Effects
- Digitized video footage
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Step 1
Open After Effects and import your footage into a Timeline.
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Step 2
Select the clip that you want to change the speed of by clicking on it under “Layer Name” in the Timeline.
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Step 3
Go to the Layer pull-down menu and select, "Time", and then, "Time Stretch."
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Step 4
The window that pops up shows the stretch factor with “100%” pre-populated, and it’s current duration (length of time.) You can either choose to make the clip a certain percentage slower or faster (100% faster, 50 % slower, etc.) or you can type in the exact time you want the clip to be. If you are not sure, choose a percentage and play around.
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Step 5
In the "Time Controls" Menu, click on the “RAM Preview” button.
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Step 6
Watch your footage, and repeat the above steps until you get it to the speed you want.








