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Problem with interpolation expressions controlling position/rotation

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Guilherme Oliveira
Problem with interpolation expressions controlling position/rotation
on Dec 13, 2012 at 7:41:26 pm

Hello folks,

I'm really bad at coding but somehow I managed to put together some eyebrown animation based on audio amplitude + position/rotation interpolation expressions but it came out very choppy :(

The thing is: I got the eyebrowns (which are represented by a red shape at the moment) of my character to move when the audio amplitude peaks but I need the movement to be smoother

Here's a piece of the animation so you can see what I'm talking about:






Let me know if you need any more details and thanks in advance

Edit: My goal here is to animate the eyebrowns only when the audio peaks to give some surprise/enthusiasm look on the face and to accomplish that I'm using the highest values of the audio peak as trigger but if you guys have a better idea I'm all ears :)

And heres the expressions:

Position:

volAmp = thisComp.layer("cabeca inteira boca fechada").effect("Voice Volume")("Slider");
ease(volAmp, 80, 90, [706,260], [706,250]);

Rotation:

volAmp = thisComp.layer("cabeca inteira boca fechada").effect("Voice Volume")("Slider");
ease(volAmp, 70, 90, 0, 5);


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Dan Ebberts
Re: Problem with interpolation expressions controlling position/rotation
on Dec 13, 2012 at 9:51:12 pm

My guess is that what you really want is an animation that is triggered by the audio level going above a certain value. That's a more complicated application. Hopefully this will explain the issues and how you detect the peaks:

http://www.motionscript.com/design-guide/audio-trigger.html

You'll probably want a different animation than the oscillation example, but if you get that far come back and ask more questions.

Dan



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Guilherme Oliveira
Re: Problem with interpolation expressions controlling position/rotation
on Dec 13, 2012 at 10:18:44 pm

That's a approach that I haven't considered! I'll give it a try, thanks!


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