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Channel: Adobe Community : Popular Discussions - After Effects Expressions
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Define two positions, tween back and forth?

So I want to do something simple: define two sets of coordinates (a "from" and a "to" position), along with a duration in frames. I want the animation to be executed, then reversed, and looped.  I know...

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Delaying Expression

Hi,I wanted to delay the scaling that is driven by an expression over a control slider. As in a tutorial video i put -10 at the end of the expression, but i don’t yet get the wanted timing delay of 10...

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Animate Number Counter - French Version

I need help figuring out how to animate a number counter, but in french. I have the english version of my numbers animating up using the following algorithm: numDecimals = 1;commas = true;dollarSign =...

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AeRender does not recognize expressions in .txt files. How to solve this issue?

Hello. We're experiencing some problems with AE render engine. I searched this across the web but found no solution.   We're a large video publishing company and we publish same videos with changed...

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Add a 0 in front of a number

Hello,  I am using a simple expression to make a calendar, going from 1 to 31Until the number 10 i would like to display a 0 in front of the number.Unfortunately everything I am trying doesn't work....

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Expression that changes y-position continuously?

How do I write an expression that moves my layer continuously in the y-axis 10 pixels each frame?

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#include Doesn't work in AE CS4

Anyone have a work around for the "#include" javascript in CS4. Used an external file to drive some text in my comp in CS3, but the same script doesn't work in CS4. I even downloaded a comp from...

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Checkbox Control using Expressions

Hi all, I'm trying to control the Mask Layer property in the Colorama plugin to always select the current layer. What I've done is created a Checkbox Control effect on the current layer to dictate that...

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Can I link a path vertex to a position property via an expression?

I want to have curves and lines draw across or between points in a video clip that has hand held camera moves in it. I've motion tracked the points I want to use and assigned the tracking data to a...

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Inverse Opacity

I have two layers. I want one to be on while the other is off. Neither one can be visible at the same time. But one of them always has to be visible. I came up with a pretty simple expression to make...

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delay scale parameter from the shape layer repeater

Hi,  I want to animate the scale parameter of the repeater effect and delay it on several shapes.  I've tried with this expression using 2 expressions sliders but without success...

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Expression at a specific time

Hi, when I apply an expression it starts from the beginning of the composition, but if I want to start it, for example, after 10 seconds, how can I? Sorry for my english.

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Increasing opacity level after audio keyframe animation

Hello all. AE Newb here. I'm just getting my feet wet with this program.  Currently I'm animating the opacity of an object by the keyframes (generated via Convert Audio to Keyframes) via the pick whip....

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Storing a position value from the previous frame

Hey guys, So, I'm trying to assign the X value a null object had at the previous frame so I can continue to subtract a number from it cumulatively. I'm trying to assign it to a variable (prevframe)....

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Limit value range with expression?

Hi there, Is there a way to put a limit on value range when linking it to key-framed audio? My situation is that I want to link the Glow Intensity of one of my objects to the key-framed audio. The...

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Smooth Rotation Expression

I will admit expressions are my downfall when it comes to After Effects. It doesn't help that anything dealing with numbers/math are a foreign language to me.  Anyway I need to make a still image of a...

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Help with expression - linking to beam points

i have this expression applied to a flare on a beam effect - it moves the flare up and down the beam. myAngle = (thisComp.layer("Spark Speed Controller").transform.rotation) / 360;p1 =...

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Expression to control speed with the option to stop?

I made a simple animation with an expression to move a layer at a constant speed. With the Separate XYZ effect I used the expression time*120 on the X position. (120 is linked to a slider control but...

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Linking position to mask path?

I know I can copy and paste a Mask Path to a layer's Position and vice versa. But is there a way to link them live with an expression?  I think I'm running into a problem with too many dimensions in an...

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Font Size Expression

I need an expression that would automatically change the font size based on how many characters are typed in. The goal is to fit multi-line text into a bounding box as it's read from the external text...

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