[Script] Add amount to keyframe velocity?

[GuercinFR]

I know how to change the value of the velocity of a key-frame (setTemporalEaseAtKey), but what if - instead of changing the ENTIRE value - I want to add to the pre-existing one.

The equivalent of xxxx.setValue(xxxx.value + Amount); but for the keyframe velocity.

Thank you!

[Paul Tuersley]

Well as you say it's the equivalent of grabbing the existing value, adding to it, then setting it. It's just a bit more laborious with something like ease because the KeyFrameEase object is an array (of length 1 to 3 depending on how many dimensions the property is) of both .speed and .influence values.

For example, increasing the in+out speed of the first dimension of the second keyframe on a selected property:

var activeItem = app.project.activeItem;
var selectedProp = activeItem.selectedLayers[0].selectedProperties[0];
var easeIn = selectedProp.keyInTemporalEase(2);
var easeOut = selectedProp.keyOutTemporalEase(2);
easeIn[0].speed = easeIn[0].speed + 10;
easeOut[0].speed = easeOut[0].speed + 10;
selectedProp.setTemporalEaseAtKey(2, easeIn, easeOut);

[GuercinFR]

Thank you so much! It works well with the speed!

What if I want to apply to the influence? Do I just need to change .speed or .influence? This code doesn't seem to work:

var activeItem = app.project.activeItem;
var selectedProp = activeItem.selectedLayers[0].selectedProperties[0];
var easeIn = selectedProp.keyInTemporalEase(2);
var easeOut = selectedProp.keyOutTemporalEase(2);
easeIn[0].influence = easeIn[0].influence + 10;
easeOut[0].influence = easeOut[0].influence + 10;
selectedProp.setTemporalEaseAtKey(2, easeIn, easeOut);

[Paul Tuersley]

Yeah that is strange. I can't explain why it's working for .speed but not .influence.

It can obviously read the .influence, as evidenced by a line like this:

$.writeln(easeOut[0].influence);

And it does seem to work if you create a new KeyframeEase object.

easeOut[0] = new KeyframeEase(easeOut[0].speed, easeOut[0].influence + 10);