I added a Speed Control filter onto a clip inside the Video Sequence Editor. When I tried to make the Multiply Speed value of this filter animated, both by making it a key frame and by making it dependent from a driver, I got the error message: Multiply Speed cannot be animated.

  • Am I doing something wrong?
  • Why is this value not able to be animated?
  • Is there a way, for instance an add-on to make it work?

My goal is to make a movie play at first very fast but then drop the speed continously until it is played in slow motion.


1 Answer 1


From my experience it is much easier to use speed control disabling Use as speed.

enter image description here

You can then just re-map frames using graph editor (after you've pressed I over the Frame number). Allows for smooth speed transitions or sharp ones, whatever you like.

This makes it also much easier to pick the exact frame from which the speed will be changing.

  • $\begingroup$ thank you, Sorry, I did not understand what you explained, for instance "press I for keyframe over the Frame number" ...I don*t get it where to click for the value "frame number" ...inside the filter or somewhere else? $\endgroup$
    – sharkant
    May 8, 2017 at 16:07
  • 1
    $\begingroup$ I've added picture. If you go to properties of strip. Select speed effect strip, (open properties panel if not open yet), find "Effect Strip" section and deselect Use as speed. Then you should get Frame number which you can animate as any other normal property. $\endgroup$
    – elmo
    May 8, 2017 at 16:25

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