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Using Magic Lantern => General Help Q&A => Duplicate Questions => Topic started by: cemanta on October 01, 2014, 09:19:37 PM

Title: 5d3 raw dng (black level issue?)
Post by: cemanta on October 01, 2014, 09:19:37 PM
Hello guys!  I'm having trouble with my RAW video. I'm using 5Diii 1.2.3 aug 7th build.

I have tried both MLRawViewer and RAWMagic Lite to get the DNGs, when the DNGs opened in Lightroom or Photoshop (or even AfterEffects) they could only see a bit of highlights.
Lightroom:
https://www.dropbox.com/s/chb63s6siggbxaa/Screen%20Shot%202014-10-02%20at%202.42.09%20am.png?dl=0
Photoshop:
https://www.dropbox.com/s/j4t6mw0j3c1ej9e/Screen%20Shot%202014-10-02%20at%202.51.27%20am.png?dl=0

However, I can see the image without distortion in Preview (or Xee).
https://www.dropbox.com/s/613pjb4lomcq8ki/Screen%20Shot%202014-10-02%20at%202.37.41%20am.png?dl=0
https://www.dropbox.com/s/7wyygujg3ozh8sg/Screen%20Shot%202014-10-02%20at%202.38.47%20am.png?dl=0

DNG file attached:
https://www.dropbox.com/s/qpex02qfy4u9nux/M29-1347_C0000_00000.dng?dl=0

I've made some research in this site, but can't find anything related.
Appreciate if anyone can tell me what exactly this problem, and what is the best resolution.  Many thanks!
Title: Re: 5d3 raw dng (black level issue?)
Post by: ayshih on October 02, 2014, 03:35:38 AM
The black level is incorrect and needs to be set to 2048, e.g.:

exiftool -IFD0:BlackLevel=2048 *.dng

Some applications, like Preview, ignore the black level stored in the EXIF metadata and instead use a presumed value (which happens to be the correct value in this case).