Is Possible Apply Expression in a Composition?

I want to make a expression related to time duration of "MainComp".
To the "MainComp" follow time duration of other Composition.

Mylenium is right, you can't act on compositions with expressions.
However, there are some workarounds.
_you can precompose your comp and put an expression on it's timeRemap.
_another solution is to add an adjustment layer on the top of your comp. On this adjustment layer, you can add a "time" effect (time distort for example) and link its timecode value via expression.
First solution is the simplest and gives the best results, the second is only if you absolutly can't precompose.
Cheers,
François

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Is it possible to express two y axes on a xy graph with different scale

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Hello.
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I am using pre_composed object in different compositions (A,B,C). Each compositions have their own camera in it (active camera). I am applying the expression bellow to rotate my object with the camera.
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There's no way for an expression to reference another comp, except by name. That means there's no way for an expression in a precomp to identify an outer, 'parent' comp.
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I would like to know if it is possible to configure an Airport Express so that it is connected to an ethernet port in a hotel room and have the express broadcast a wireless signal to my iPad?
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1. I currently don't own an Airport Express, so I am not certain what kind of settings will need to be changed from default.
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3. Will I still need to run the Airport Utility at the hotel?
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4. Is there an Airport Utility app available for the iPad?
Sorry, not that I'm aware of ... at least, not yet.
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Apply default transitions not working when applied next to AE Compositions

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http://rapidshare.com/files/456403457/VB_Vignette3.jsx
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Yeah, that's the problem......
I need to get the name of the "active item" (a comp in this case) and use that name inside of an expression.
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(Dan you're awesome!, love three d corner pin;)

Can I apply Burn to a composite image but without flattening?

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Background
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Guy Burns wrote:
I have uploaded a test image here…
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After pressing OK it says contact support but I thought I would post here first.

We can't know anything without knowing the expression code and the structure of your project.
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x

Applying photoshop filters in After effects layers!

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Regular expressions with boolean connectives (AND, OR, NOT) in Java?

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AND is implicit,
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>
You'd probably just be better off doing multiple
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Is Possible Apply Expression in a Composition?

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