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Thread: Problems rendering in 32 bpp...

  1. Exclamation Problems rendering in 32 bpp...

    I'm currently working on a different machine to the one I'm usually on, and every time I try and render a MOV, using the Sorenson 3 Pro codec (the only codec I know that allows me to render in 32 bpp), the rendered video ends up looking like 24 bpp, even though I have the Compressed Depth set to "32 bpp color"... Any ideas why? Pixel-Format is set to "32-bit floating point" and Compositing Gamma to "2.222 (Video)" in my Project Properties... So what's the deal?

    MS.

  2. Default

    Just a thought, but could it have something to do with working with XP, as opposed to Vista? All previous editing work was done on Vista Ultimate.

    MS.

  3. Default

    OK, I think I've found a *partial* fix for this problem...

    * Open up the file in QuickTime Pro
    * Go to Window -> Show Movie Properties
    * Highlight "Video Track"
    * Click on the "Visual Settings" tab
    * Click on the "Transparency" drop-down menu
    * Select "Blend" from the menu
    * Move the "Transparency Level" slider to 100%
    * Choose "Straight Alpha" from the same drop-down menu
    * Close "Properties"
    * Go to File -> Save
    * FIN!

    The blacks now look black as opposed to grey, but the colours still look a little washed out...

    Not perfect, but looks a lot better.

    MS.

  4. #4

    Default

    I see u also posted on dvxuser's forums as well. Their Vegas forums have been slacking as of late.
    -Sean
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  5. #5
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    Default

    I am suprised that there is a drastic bifference between 24 and 32 bit colour depth.
    Most cameras are lucky to hit 12 and many editirs work in only 8 or 16.
    To my eye I can only see any problems above 16 when using very fine colour grading.
    Are you certain this is a colour depth effect and not just a codec compression artifact ?
    I odnt think xp is a factor in this.
    Last edited by Mark W; 06-21-2008 at 01:12 PM.

  6. Default

    Quote Originally Posted by Mark W View Post
    Are you certain this is a colour depth effect and not just a codec compression artifact ?
    I'm not actually sure what it is now, other than a shift in gamma and the colours being washed out... It's just comparable to the 24bpp versions I rendered out for comparison sakes. The thing is, I've never experienced these same problems on my XPS laptop, running Vista, so I'd be tempted to say it *isn't* to do with codec compression. Apparently, the H.264 codec has an issue with Gamma / Color desaturation, and Apple are looking into it, but what it doesn't explain is why other codecs are also behaving like this. I can only think I haven't set up Vegas correctly on this machine.

    MS.

  7. #7
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    Default

    Useful info.

    I dont think that reduced colour depth should cause desaturation, all i notice at low colour depth is band on getle colour grades.

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