Answers.Body: <p>Here's what I did in the end (as an expression on the  text layer)</p>
  
  <pre><code>countspeed = 144;
  clockStart = thisComp.duration * countspeed * -1;
  
  function times(n) {
      if (n &lt; 10)  return "0" + n else return "" + n
  }
  
  clockTime = clockStart + countspeed * (time - inPoint);
  
  if (clockTime &lt; 0) {
      minus = "";  clockTime = -clockTime;
  } else {
      minus = "";
  }
  
  t = Math.floor(clockTime);
  h = Math.floor(t/3600);
  min = Math.floor((t%3600)/60);
  sec = Math.floor(t%60);
  ms = clockTime.toFixed(3).substr(-3);
  minus + times(h) + ":" + times(min) + ":" + times(sec) 
  </code></pre>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2012-11-20T20:43:00.297Z
Answers.LastActivityDate: 2012-11-20T20:43:00.297Z
Answers.UserDisplayName: Alfo
Answers.Body: <p>You will have to do it with expressions, unfortunantly it is the only outside of possibly finding a 3rd Party plugin...</p>
  
  <p>This is a good start, <a href="http://www.motionscript.com/design-guide/up-down-clock.html" rel="nofollow">http://www.motionscript.com/design-guide/up-down-clock.html</a></p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2012-11-19T22:58:59.793Z
Answers.LastActivityDate: 2012-11-19T22:58:59.793Z
Answers.UserDisplayName: Chris James Champeau
Body: <p>I'm sure someone out there must have done this before, but how do I create a countdown timer with hours, minutes and seconds that starts from a specific time and counts down at 71.928x speed?</p>
  
  <p>71.928x because I took one frame every 3 seconds and I'm playing it back at 23.976fps.</p>
  
  <p>I've tried using text expressions but to no avail.</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2012-11-18T14:13:35.203Z
Comments.Text: Take a look at this tutorial: http://www.youtube.com/watch?v=KFFiWQhnfGo
Comments.UserDisplayName: Saaru Lindestøkke
Tags: <after-effects>
Title: Timelapse Countdown Timer in After Effects
UserDisplayName: Alfo
ThreadText: # Timelapse Countdown Timer in After Effects
  
  (Asked by: username_0 on 2012-11-18)
  
  I'm sure someone out there must have done this before, but how do I create a countdown timer with hours, minutes and seconds that starts from a specific time and counts down at 71.928x speed?
  
  71.928x because I took one frame every 3 seconds and I'm playing it back at 23.976fps.
  
  I've tried using text expressions but to no avail.
  
  **Tags:** after-effects
  
  > **Comments:**
  > **username_1**: Take a look at this tutorial: http://www.youtube.com/watch?v=KFFiWQhnfGo  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_0 on 2012-11-20. Score: 0 | Accepted answer
  
  Here's what I did in the end (as an expression on the text layer)
  
  ```
  countspeed = 144;
  clockStart = thisComp.duration * countspeed * -1;
  
  function times(n) {
      if (n < 10)  return "0" + n else return "" + n
  }
  
  clockTime = clockStart + countspeed * (time - inPoint);
  
  if (clockTime < 0) {
      minus = "";  clockTime = -clockTime;
  } else {
      minus = "";
  }
  
  t = Math.floor(clockTime);
  h = Math.floor(t/3600);
  min = Math.floor((t%3600)/60);
  sec = Math.floor(t%60);
  ms = clockTime.toFixed(3).substr(-3);
  minus + times(h) + ":" + times(min) + ":" + times(sec) 
  
  ```
  
  
  ---
  
  ### Answer by username_2 on 2012-11-19. Score: 1
  
  You will have to do it with expressions, unfortunantly it is the only outside of possibly finding a 3rd Party plugin...
  
  This is a good start, <http://www.motionscript.com/design-guide/up-down-clock.html>
  
  
  ---
  
  