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Activity Forums Adobe After Effects Expressions Multiple expression controls in one.

  • Todd Kopriva

    August 5, 2011 at 3:55 am

    You can do that kind of thing with a “custom effect”.

    See this:
    https://maltaannon.com/what-customeffects-are/

    ———————————————————————————————————
    Todd Kopriva, Adobe Systems Incorporated
    Technical Support for professional video software
    After Effects Help & Support
    Premiere Pro Help & Support
    ———————————————————————————————————

  • Nick Wheeler

    October 12, 2011 at 7:00 am

    I am trying the application but it is not working… Anything else?

  • Dan Ebberts

    October 12, 2011 at 3:55 pm

    I would do it with a simple Pixel Bender plug-in. You’ll need to get your hands on the developer’s guide:

    https://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/devnet/pixelbender/pdfs/pixelbender_guide.pdf

    Focus on the section titled “Developing for After Effects”.

    Basically, you write a plugin that does nothing except define the controls you need and pass the image through untouched with a function like this:


    void
    evaluatePixel()
    {
    dst = sampleNearest(src,outCoord());
    }

    As a bonus, once you learn the Pixel Bender syntax, you’ll be able to write simple plugins that actually manipulate the image.

    Dan

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