• Adobe After Effects Expressions

  random time?

  Posted by Christoph Smaid on August 1, 2008 at 10:19 pm

  hey guys,

  i m very new to expressions, so excuse me if ths is a dumb question 😉 i have a precomp with several layers (about 2000 frames long). i put this in my comp and activated time remapping. i added an expression on the time remapping – random (2000), so that i have a random sequence of my precomp. now i want that each frame (of the precomp) lasts, let’s say, 3 frames in my main comp. any ideas? hope that it is understandable and sorry for my bad english.

  thanks

  Christoph Smaid replied 17 years, 9 months ago 2 Members · 4 Replies
• 4 Replies

• 

  Dan Ebberts

  August 2, 2008 at 12:19 am

  Something like this should be pretty close:

  numFrames = 3;
  posterizeTime(1/(numFrames*thisComp.frameDuration));
  random(thisComp.duration – numFrames*thisComp.frameDuration)

  Dan
• 

  Christoph Smaid

  August 4, 2008 at 5:44 pm

  thanks for answering.
  i put the expression on the timeremapping of the precomp, but doesn’t work. can’t see anything… any other ideas? tried it with another video, but doesn’t work as well….

  chris
• 

  Dan Ebberts

  August 4, 2008 at 6:00 pm

  I just tried it again with a video clip. For me, it jumps to a random frame and holds the frame for 3 frames, jumps to another random frame, etc. I don’t have a clue as to why it doesn’t work for you.

  Dan
• 

  Christoph Smaid

  August 4, 2008 at 6:36 pm

  yeah, of course, sorry. the problem was that the precomp had a differnt lenght than my main comp. so it works well now, thank you!

  cheers, chris

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