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Activity Forums Adobe After Effects Expressions Sorry for the repost but I meant to post here

  • Sorry for the repost but I meant to post here

    Posted by Tyler Paul on October 14, 2008 at 2:33 pm

    I’m trying to come up with a way to “speed up” the frame rate of footage but not in the conventional way.

    I’d like a set up where the first frame is held for the first two seconds, then it advances to the 61st frame for one second. Then it advances to frame 91 for half a second. Then frame 106 for quarter of a second. Then frame 113 for eight of a second and so on until the footage will be displaying every frame. For the sake of easy math I used numbers that would represent a straight line.

    I’d actually like to control the rate at which the frames advance by a curve of some sort so that it’ll hold a frame 2 seconds, advance to the 61st frame for 1.8 seconds, advance to the next frame for 1.3 seconds, next frame for .5 seconds, next frame for .05 seconds and so on. (I think those numbers make an alright curve)

    Does that make sense?

    The next thing that needs to be added to this a counter starting with 0 and adding 1000 everytime the frame switches.

    I did come up with a way to do both of these things but the math was fuzzy and the counter didn’t match up exactly with the changing of frames. It worked alright but I’m hoping there’s a more powerful and accurate way to do this

    Tyler Paul replied 17 years, 6 months ago 1 Member · 1 Reply
  • 1 Reply
  • Tyler Paul

    October 15, 2008 at 11:23 am

    Well, I found an easy solution to the time posterizing. I created a slider and keyframed it 0 to 30 and used the Math.floor(value) expression. Gave it a curve. Applied posterize time to my footage and keyframed to my slider results. Still not entirely accurate but it’ll do.

    next I have to work out how to add the counter. I’m trying to graphically represent ‘a picture is worth a thousand words’ so I need to make a counter that adds 1000 every time the frame switches. It would be mucho appreciated if someone has any tips on how to do it. I’ll be working on that now and will be sure to post the solution once I figure it out.

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