Cinema DNG discrepancies

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JulianGil

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  • Joined: Tue Aug 28, 2012 8:06 pm

Cinema DNG discrepancies

PostWed Aug 29, 2012 4:34 pm

I've noticed that I get some discrepancies with BMCC Cinema DNGs in Resolve when compared to Adobe Camera Raw. Why is that?

For example, I have a Cinema DNG frame of a very dark scene where the blacks are completely crushed out and I cannot recover them in Resolve. However, if I open the same DNG in Adobe Camera Raw, all the detail is easily recoverable.

Am I doing something wrong? Please any insight would be great!

-Julian
cMP 2010 2x 3.46GHz 6-Core 64GB RAM Radeon VII 16GB
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CaptainHook

Blackmagic Design

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Re: Cinema DNG discrepancies

PostWed Aug 29, 2012 8:51 pm

How are you trying to recover them in resolve?
Are you adjusting the camera raw settings first in this panel?
Image

Change "decode using" to clip, and also "white balance" to clip so you can adjust exposure/wb/tint for the shot. I think this is vital with the default resolve is showing for the BMCC DNG's at present. All apps will display DNG's differently. Also, check this:

viewtopic.php?f=2&t=22&start=110#p1034
**Any post by me prior to Aug 2014 was before i started working for Blackmagic**
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JulianGil

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Re: Cinema DNG discrepancies

PostThu Aug 30, 2012 3:50 pm

It just looks like it's not as flexible in Resolve as it is in Adobe Camera Raw.
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Sareesh Sudhakaran

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Re: Cinema DNG discrepancies

PostWed Sep 05, 2012 11:43 am

juliangil wrote:I've noticed that I get some discrepancies with BMCC Cinema DNGs in Resolve when compared to Adobe Camera Raw. Why is that?

-Julian


There are many algorithms one can use to debayer RAW data. Each RAW converter has its own methods - this has been a constant 'problem' in the still photography industry.

If you use a third RAW converter, like RAW Therapee, for example, you'll see an even greater variation - or possibilities, depending on how you look at it.

For a basic understanding of RAW, read an article I wrote http://wolfcrow.com/blog/deconstructing-raw-part-i/.

Hope this helps.
https://wolfcrow.com
https://youtube.com/wolfcrow

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