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swimmerman1989
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Grainy/"Pixelated" after color correction

Feb 4, 2013 9:37 AM

Any time I do color correction or color grading (only slight adjustments), my footage appears to be very grainy/"pixelated." Has anyone else encountered this issue?

443 Views   10 Replies   Latest reply: Steve Grisetti, Feb 6, 2013 10:47 AM
 
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  • Steve Grisetti
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    1. Steve Grisetti,
    Feb 4, 2013 9:54 AM   in reply to swimmerman1989
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    Have you rendered your timeline before playng it back (by pressing the Enter key on your keyboard)?

     
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  • swimmerman1989
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    2. swimmerman1989,
    Feb 4, 2013 3:01 PM   in reply to Steve Grisetti
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    Yes

     
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  • Steve Grisetti
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    3. Steve Grisetti,
    Feb 4, 2013 3:56 PM   in reply to swimmerman1989
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    Can you provide a screen capture of the video you're trying to color correct -- and another of what it looks like after?

     

    You can only improve an image so much -- especially a very dark image -- before it starts to get ugly blotches.

     
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  • swimmerman1989
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    4. swimmerman1989,
    Feb 5, 2013 1:22 PM   in reply to Steve Grisetti
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    http://i1298.photobucket.com/albums/ag45/swimmerman1989/1_zps4aaeb459.png

    http://i1298.photobucket.com/albums/ag45/swimmerman1989/2_zpsea63cd7b.png

    http://i1298.photobucket.com/albums/ag45/swimmerman1989/3_zpsa8c7f83c.png

     

    First image is raw footage.  Second image is color corrected and not rendered.  Third image is color corrected and rendered so I can export, but appears very grainy/pixelated.  This is the case everytime I try to color correct a clip.

     
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  • Steve Grisetti
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    5. Steve Grisetti,
    Feb 5, 2013 6:07 PM   in reply to swimmerman1989
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    I can see some graininess -- but the results actually look pretty good to me.

     

    That said, have you tried adjustments with any othe Adjustments than Gamma? You might well get different results - and without the graininess.

     
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  • swimmerman1989
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    6. swimmerman1989,
    Feb 5, 2013 6:49 PM   in reply to Steve Grisetti
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    Look at the difference between the middle snapshot, and the bottom snapshot.  Both are color corrected, but the one AFTER rendering is grainy.  The one BEFORE rendering is 100% clear. Perfect.

     

    Yes, I have tried all sorts of adjustments.  Gamma adjustments result in the least amount of image distortion.

     
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  • Steve Grisetti
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    7. Steve Grisetti,
    Feb 6, 2013 5:09 AM   in reply to swimmerman1989
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    Have you tried adjustments with any othe Adjustments than Gamma? You might well get different results - and without the graininess.

     
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  • swimmerman1989
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    8. swimmerman1989,
    Feb 6, 2013 6:47 AM   in reply to Steve Grisetti
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    Yes, I have tried every type of adjustment available.  All end with the same result.  Perfect before rendering...very grainy after rendering.

     
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  • Steve Grisetti
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    9. Steve Grisetti,
    Feb 6, 2013 7:06 AM   in reply to swimmerman1989
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    I'm sorry. I don't have a solution for you. Some adjustments are going to reduce or increase contrast between pixels, which can result in a picture that's not as sharp as the original.

     

    Although, usually, there's one Adjustment that does less of this on a given clip than another.

     
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  • Steve Grisetti
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    10. Steve Grisetti,
    Feb 6, 2013 10:47 AM   in reply to Steve Grisetti
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    BTW, have you tried outputting your movie yet as say an AVCHD?

     

    Since you're working in hi-def, it's possible the render you're viewing in your playback is not a true representation of what a finished hi-def output will look like.

     
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