get a value at a certain keyframe

[Dan Ebberts]

Something like this should work:

s = thisComp.layer(“Shape Layer 1”).content(“Rectangle 1”).content(“Rectangle Path 1”).size;
s.valueAtTime(s.key(s.numKeys).time)[0]

Dan

[Tom Gomez]

As always thanks so much Dan.

It was giving me an error (something about 2 dimensions) with the [0] so I removed it and it worked like a charm. Any idea why?

Quick question: Where in that expression does it tell it to look at the second keyframe?

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[Dan Ebberts]

>Any idea why?

You mentioned that you wanted the width, so the [0] isolates the width part of the 2D size parameter.

>Where in that expression does it tell it to look at the second keyframe?

The expression looks for the last keyframe, which is what s.numKeys does.

Dan

[Eduardo Asta]

Hello Dan,

I have a similar problem. I have a shape layer with two key frames on Trim Paths. I want to grab the second Trim Paths keyframe value and link it to a slider.

Do you if it is possible?

[Tomas Bumbulevičius]

Eduardo – you can’t alter the value of keyframe itself by a slider.

Instead of using keyframes, you could use interpolation methods, which can be controlled by sliders then.

Find out more:
After Effects Tutorials: motion design, expressions, scripting.
Boxer – Dynamic Text Boxes Template with a Live Preview

[Eduardo Asta]

Hello Thomas,

I guess my question wasn’t clear. I could solve my problem using, yes, a liner method.

Thanks for the website you sent to me. I didn’t know it.

if (numKeys > 1){
t1 = key(1).time;
t2 = key(2).time;
v1 = 0;
v2 = effect("Posicao")("Slider"); <----this one allows me to set by a slider the initial position of my layer
linear(time,t1,t2,v1,v2);
}else value