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M´Pete

Q: Image border trouble

I have an image from the Action Essentials 2 package that I´m using as a layer.
The image blends perfectly, but the border/edges of the image is visible as a black box. Not in a in-your-face kind of way, but it's still visible...
I tried making a mask, but that just changed my border from a square to a circle. I tried feathering my mask, but the feathered area became a darker grey and just made things worse.

Any thoughts?

[IMG]http://i45.tinypic.com/2zeyntd.png[/IMG]

MacBook Pro, Mac OS X (10.5.8)

Posted on Jan 31, 2010 2:43 PM

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Q: Image border trouble

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  • by Patrick Sheffield,

    Patrick Sheffield Patrick Sheffield Jan 31, 2010 7:02 PM in response to M´Pete
    Level 7 (29,175 points)
    Jan 31, 2010 7:02 PM in response to M´Pete
    the picture is tiny, but I'm guessing it's a premult thing... however you're placing the one layer over the other, try turning off premult...

    Patrick

  • by M´Pete,

    M´Pete M´Pete Jan 31, 2010 11:41 PM in response to Patrick Sheffield
    Level 1 (0 points)
    Jan 31, 2010 11:41 PM in response to Patrick Sheffield
    Premult was already turned off. Tried turning it on, but that made the border more visible than before.

    And the pictures size isn´t the problem either - get the same effect when the files are 1920x1080 (originaly they are 2K files)...
  • by stuckfootage,

    stuckfootage stuckfootage Feb 1, 2010 10:34 AM in response to M´Pete
    Level 4 (3,040 points)
    Feb 1, 2010 10:34 AM in response to M´Pete
    Doesn't happen for me, but I'm just using the version of the cracks file
    from a screenshot. I don't have the original file. My guess would have
    been some sort of premult issue, but you say you've checked that out.

    I wonder if there's some weirdness around the edges of the cracks image itself.
    What if you just follow the cracks FileIn with a Crop node, and shave off
    the edge?

    Have you tried this?
    http://www.videocopilot.net/support/
    The people at Video Copilot are actually paid to answer your questions.
    Here on the Apple Forums, all we get are little virtual stars
    when people remember to mark our responses.

    Good luck! Let us know if you are able to solve the problem.
  • by masterslacker,

    masterslacker masterslacker Feb 2, 2010 7:16 AM in response to M´Pete
    Level 1 (5 points)
    Feb 2, 2010 7:16 AM in response to M´Pete
    I saw a youtube tutorial from appleshakeguru that this occurs when keying footage sometimes and he suggested using a SetBgd node. Although maybe that's not how you got the black line. Might be worth a go to dig up that youtube clip and see if it helps. You could also roto with a switchmatte if crop isn't working.
  • by M´Pete,

    M´Pete M´Pete Feb 2, 2010 10:57 AM in response to masterslacker
    Level 1 (0 points)
    Feb 2, 2010 10:57 AM in response to masterslacker
    SetBgd-node? I don´t have that one... Of course, I´m new in Shake and haven´t really worked in it much, so you could just be talking about the Set-node combined with another node. I really wouldn´t know...

    Crop isn´t working, and neither is rotoshaping with a SwitchMatte.

    I´ve found a workaround where I create a RotoShape on the MultiLayer itself. This means that the MultiLayer in reality works as an Over-node, consisting of my background movie and the image on top.
    The MultiLayer will then go into L1 of a new MultiLayer, and work as the bottom layer of my comp.

    Not exactly what I was hoping for, but at least it works!
  • by masterslacker,

    masterslacker masterslacker Feb 3, 2010 3:56 AM in response to M´Pete
    Level 1 (5 points)
    Feb 3, 2010 3:56 AM in response to M´Pete
    Oops..sorry I didn't remember the correct node name. It's called SetBGColor under the color tab and I think you make it the color that you're keying and it fixes your line. It seems you have figured it out though so that's cool. That's the really cool thing about Shake IMHO is that there are at least 2 or more ways to solve problems. I would guess the only problem could be it might take longer to render or use more memory with certain solutions but it's just CPU cycles.
  • by M´Pete,

    M´Pete M´Pete Feb 3, 2010 4:10 AM in response to masterslacker
    Level 1 (0 points)
    Feb 3, 2010 4:10 AM in response to masterslacker
    I´ll try the SetBGColor-node when I get around to it, but for now I´ll continue my comp using my newfound technique!

    Thanks