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elcuad Calculating status...

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Pink/purple pixels in clipped highlights only in 16 and 32bpc

May 17, 2012 8:00 PM

Tags: #video #render #pink #purple #pixels #color_correction #color_space #bpc

Hello all,

I put my color space in 16bpc and the clipped highlights show pink/purple pixels. i thought they were just warning, but when I render them out, they show up still. They don't show in 8 bpc. i tried other projects I have, but with teh same result. After effects CS5.5 Picture is attached.

473 Views 4 Replies Latest reply: elcuad, May 18, 2012 11:16 AM

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1. Mylenium,

May 17, 2012 11:27 PM in reply to elcuad

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Yes, your compressed footage is not correctly being expanded to higher bit depths. Apply a Compander effect to compensate.

Mylenium

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2. elcuad,

May 17, 2012 11:37 PM in reply to Mylenium

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Thanks for the reply. I tried the HDR Expander and, unfortunately, it didn't work. It seems the problem is with the Avid DNxHD codec. Animation, cineform other codecs work fine with this same footage, just DNxHD (all flavors from 36-175 10bit) is giving me the pink/purple clipped highlights in 16 bpc and 32 bpc.

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3. Mylenium,

May 17, 2012 11:42 PM in reply to elcuad

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Ah yes. DNxHD could be problematic. Make sure to download the latest version from Avid. They fixed it in on of the recent versions, if I'm not mistaken.

Mylenium

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4. elcuad,

May 18, 2012 11:16 AM in reply to Mylenium

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again, thanks for the reply. I do have the latest version (Comes with AVid MC 6.0 which is 2.3.7), unfotunately. Oh, well, I can work in 8 bit I guess.

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