• Adobe After Effects Expressions

  lower thirds for premiere using sourceRectAtTime

  Posted by Shahar Bareket on June 14, 2017 at 4:58 pm

  Hi Guys!
  Im trying to create a lower third to be used as a template in premiere and i want it to be as foolproof as possible.

  

  We work in RTL here (right to left)
  I want the text to slide from the right behind a mask and reveal. thats pretty straight forward with keyframes,
  the problem is, i want it to always hit the same start and end points no matter what the width of the text layer is!

  I can do the math, i just don’t know how to write as an expression to the position..

  I tried it with markers and i guess it works.. (i think it has errors on it though it did worked at some point)
  I just want it to have ease in the timing, and im sure im missing something huge in here and theres a much more elegant way of doing this..

  Any help will be appreciated!!
  Thanks!

  s=thisLayer
r=s.sourceRectAtTime(time-s.inPoint,true);
n = 0;
if (marker.numKeys > 0){
n = marker.nearestKey(time).index;
if (marker.key(n).time > time){
n--;
}
if (n > 0) {t = time - marker.key(n).time;

  if (n == 0){
value;
} else {
if n == 1 {s.property("Position").setValue([1920+r.width,900]);}
if n == 2 {s.property("Position").setValue([1700-r.width,900]);}
if n == 3 {s.property("Position").setValue([1700-r.width,900]);}
if n == 4 {s.property("Position").setValue([1920+r.width,900]);}
}

  Shahar Bareket replied 9 years, 2 months ago 1 Member · 0 Replies
• 0 Replies

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