Ok, this works very well, but also very slowly. It requires several seconds to process each frame.

Is there a way to get the property using sourceRectAtTime() on the first layer inside the comp?

something like: sc=comp(“1”).layer(0).sourceRectAtTime();

but then I get an error that “index 0 is out of range”

maybe something made up like:…

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i have a comp with transparency. i want to center the anchor point of the comp to the area of opacity. I tried this on the comp:

// [CENTER, CENTER]
l = thisLayer.sourceRectAtTime();
[l.left + l.width/2, l.top + l.height/2];

but it seems to measure the entire comp, not the opaque areas. Suggestions?

oh wow, thank you! Not sure how that happened.

it suggests Math.trunc() when i type it, but then it says its not a function. The slider is a number, and did parseInt() to make sure it was a number. I’m in AE 23.1.0