Framing a comp using another comp?

[Brendon Murphy]

Totally possible:

1. Put the same background into both comps

2. inside the smaller “framing” comp, add this expression to the position parameter of the background image

ogPosX = comp("framing Comp1").layer("background").transform.position[0];
ogPosY = comp("framing Comp1").layer("background").transform.position[1];
adjustPosX = comp("framing Comp1").layer("framing").transform.position[0];
adjustPosY = comp("framing Comp1").layer("framing").transform.position[1];
adjustWidth = thisComp.width/2;
adjustHeight = thisComp.height/2;
[ogPosX-adjustPosX+adjustWidth,ogPosY-adjustPosY+adjustHeight];

Assuming you haven’t shifted any anchor points, that should do it!

free tools at https://www.thepixeldump.com/

[Filip Vandueren]

Here’s how I do this:

• In the “Framing Comp”, where a copy of the footage lives, create a “Framing Solid” that has the same dimensions as your footage
• Parent it to the footage.
• In the other comp that you want framed add these expressions to the footage layer.

anchorPoint:

L = comp("Framing Comp").layer("Framing Solid");
L.parent.fromComp(L.toComp([L.width/2, L.height/2]));

position:

[thisComp.width/2,thisComp.height/2];

scale:

s=comp("Framing Comp").layer("Framing Solid").transform.scale[0];
value * [100/s];

rotation:

comp("Framing Comp").layer("Framing Solid").transform.rotation * -1;

This way postition, scale, and rotation will be implemented from the framing Solid, and you can freely change the anchorPoint of the framing solid which can help in certain rotation and zoom effects.

BTW, it is absolutely a practical and more intuitive way to handle these kinds of pan & scan effects.