Blender VSE Speed Adjust Addon

When using Video Sequence Editor in Blender, the speed effect strip doesn’t auto-adjusts clip length when changing its speed factor. As a result, we have to manually change the length of the video strip.

Using this very basic addon, we can adjust video strip length based on the speed factor we set.


  • Blender 3.0.0 or above.
  • Developer Extras option should be enabled, under Edit -> Preferences -> Interface.


  • Go to Edit -> Preferences -> Addons.
  • Press the “Install” button.
  • Select the file.
  • Wait for a few seconds before the installation completes.
  • Check the Sequencer Speed Effect Adjust option to enable it for use.

How to use?

  • Add Speed effect strip to a video strip.
  • Set Speed Control to Multiply.
  • Set your desired Multiply Factor/Speed Factor.
  • Video strip’s speed will now be increased, but its length will remain the same.
  • To change the length, open Operator Search menu. Default hotkey is F3.
  • Type in Sequencer Speed Effect Adjust to search for this operator, select it, and press enter.

And that’s it. The video strip length will be auto-adjusted to the new speed we set.


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