• Adobe After Effects

  Exprssion to scale layer to pixel size

  Posted by Riccardo Sinti on October 6, 2015 at 4:43 pm

  I have hundreds layers of differing sizes.
  I need an expression that will scale the layer to a specific size, say
  60px by 40px.
  Thanks!

  Riccardo Sinti replied 10 years, 7 months ago 3 Members · 4 Replies
• 4 Replies

• 

  Walter Soyka

  October 6, 2015 at 4:59 pm

  // set target dimensions in pixels
  targetX = 60;
  targetY = 40;

  [targetX/width*100, targetY/height*100]

  Walter Soyka
  Designer & Mad Scientist at Keen Live [link]
  Motion Graphics, Widescreen Events, Presentation Design, and Consulting
  @keenlive   |   RenderBreak [blog]   |   Profile [LinkedIn]
• 

  Kalleheikki Kannisto

  October 6, 2015 at 5:01 pm

  The code for scale would be:

  rect=sourceRectAtTime(time, false);
rw = rect.width;
rh = rect.height;
finalWidth=60;
finalHeight=40;
[finalWidth/rw*100, finalHeight/rh*100]

  You can replace the finalWidth and finalHeight settings with a slider if you want to be able to change them.

  The scaling is not proportional with this expression, it will force the layers to be that size regardless of original dimensions. Layers will scale around their origin points.

  You can put this expression into one layer scale property then copy and paste to all other layers.
• 

  Walter Soyka

  October 6, 2015 at 5:11 pm

  Kalle’s is better than mine. Mine won’t work on vector/text layers, but his will.

  Walter Soyka
  Designer & Mad Scientist at Keen Live [link]
  Motion Graphics, Widescreen Events, Presentation Design, and Consulting
  @keenlive   |   RenderBreak [blog]   |   Profile [LinkedIn]
• 

  Riccardo Sinti

  October 7, 2015 at 8:48 pm

  Thank you both!

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