I am animating a volume meter, and have done the "tricky bit" of getting the volume value.

Now I want to apply the volume value to a mask , so that as the music moves, the mask is exposed in time to the beat.

I have tried two ways, the first by scaling the mask. However, I can't get it to scale in one direction only (i.e. it scales around a center point.) Even if I move the pan anchor it still doesn't pin the base of the shape.

The other way I tried was using a linear wipe. However, this was no good either, as the whole wipe effect is completed at 38% (i.e. if I move the slider the object vanishes totally at 38%, not 100% as I would expect.)

Is there a better way to do this?

Seems simple, but has me stumped.

  • Set the Anchor Point to the bottom of the object by pressing y or clicking on enter image description here
  • Disable proportional scaling enter image description here
  • Optional you can add a slider control to to get a better control of direction scale values

enter image description here

The shape can also used as track matte, just set the layer below to Alpha.

Note: As alternative you could use a trim path on a shape layer as track matte, see this answer:

  • This doesn't work on v.17.1.1, apparently. – Lee Dean Jan 14 at 16:50

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.