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formula for sequencing layers
i often use the Sequence Layers keyframe assistant to make quick montages of layers that all have the same duration. in order to ensure that the duration of my layer sequence fits exactly (or as closely as possble) into my comp’s duration, i will use trial & error — set the duration of all of my layers by setting their in-points at 0:00:00:00, trimming their out-points, then sequence them. if the layer sequence extends past the end of the comp, i’ll undo, re-trim out-points, try again.
i’m wondering if there is some algebraic formula i could use to calculate the exact duration of my layers so that their sequence would fit in the duration between the first layer’s in-point and the end of the comp’s duration.
the way i figure, there are four variables:
t = amount of time in comp’s duration to fill with layer sequenced = duration of each layer to sequence (assuming d is same on all layers)
o = duration of overlap (if any)
n = number of layers to sequence
i’m terrible at algebra. can some math-minded AE guru help out?
thanks in advance,
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6 Replies
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Assuming you want to solve for duration, I think it would be:
d = (t + o*(n-1))/n
Dan
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dan ebberts to the rescue, again!
thank you, sir!
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Dan,
You’re one hell of a sharp guy.What else can I say.
Andrew -
Aw, shucks – come on, I’m blushing here.
Hey Andrew, I got a chance to check out your “Serious Effects & Compositing” DVD. It’s very, very nice. I’m extremely jealous of you guys that have such a relaxed, entertaining delivery. Well done sir!
Dan
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Thanks Dan,
I’m glad you had a chance to check it out. Your opinion means a lot to me, so thanks.Andrew
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When I sequence layers I usually just grab them all in the project window and then drag them to the new comp icon. you get a dialogue box that gives you options to sequence the layers and set the overlap. before I start I just divide the time by the number of seconds. say you have 40 photos and you want the comp to be 2 minutes divide 120 by 40 and get 3 seconds, then you add the layer overlap and put it in the length window. Now your comp is made exactly the right length and all you had to do is divide the time you want by the number of photos and decide what the overlap would be.
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