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Ann Bens
Ann Bens
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Adding directional blur to adjustment layer/nested sequence

Jul 21, 2012 4:15 AM

When adding a directional blur to adjustment layer or a nested sequence in MPE hardware mode the sides get dark (alpha channel shows).

When turning MPE off the issue is gone.

Already submitted a bugreport but found out its MPE hardware.

Seen this issue in a previous version of Premiere. Think it was fixed then, but now its back.

 

MPE on:

mpe hardware on.png

MPE off: this is how it should be.

mpe hardware off.png

Can someone test this, and see it its reproducable.

 

Message was edited by: Ann Bens

411 Views   3 Replies   Latest reply: ComputerNovice25, Jul 21, 2012 4:02 PM
 
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  • ComputerNovice25
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    1. ComputerNovice25,
    Jul 21, 2012 1:01 PM   in reply to Ann Bens
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    This is how it looks for me when I take a extension with a alpha channel over a simple BG and turn Cuda on then turn Cuda off.

     

    CudaOn.png

    The image above is with GPU acceleration turned on.

     

     

     

     

     

     

     

    This image below this sentence is with software on.

    SoftwareOn.png

     

    In a way it appears simliar to your findings since when my GPU accleration is turned on you can see a white boarder creeping up from the bottom and top but with it off you don't see it.

     

    However when I turn the blur up higher and try it again I get these results.

     

    GPU On in the image directly below.

    CudaOn2.png

    GPU off in the image below this sentence.

    SoftwareOn2.png

     

    I'm using the exact same blur settings in both images... In the top image you can see that white is taking over the picture.

     

     

     

    This has GPU on in the image below this sentence.

    GPUon.png

     

    This is Software only on in the pic below this sentence.

    SoftwareOn3.png

     

    Not really sure if this confirms anything for you or not though. Just figured I'd post it cause the issue seemed intresting to me. Anyways though here were my findings.

     
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  • Ann Bens
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    2. Ann Bens,
    Jul 21, 2012 2:21 PM   in reply to ComputerNovice25
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    Thanks for testing, I appreciate it: it has something to do with MPE and alpha channel if you ask me.

    Tried something different.

    Sent a clip from Premiere,  via DL to AE and added a gaussian blur.

    Below a screendump from AE, note the 'feathered edge'

     

    alpha channel.png

     
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  • ComputerNovice25
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    3. ComputerNovice25,
    Jul 21, 2012 4:02 PM   in reply to Ann Bens
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    Yeah it does appear to pull the edge inwards. Almost just like feathering

     
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