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Extend

This script extends the out point of your layer (the ending) to match the asset that is being sent for rendering. It is useful when you have a placeholder asset that’s a 10-second video and you want to swap it out with a 20-second video dynamically. If you don’t add the Extend script, After Effects will cut your video after 10 seconds. With the Extend script it will show the full 20 seconds.

These are the options for the extend script:

  • Maximum duration - limits the maximum duration of the layer to the given value in seconds.

The Extend script only extends the layer, not the composition. If you need to trim the parent composition to match the duration of the newly added asset, you will also need to add the Crop script after the Extend script.

CropSet duration