Lightroom distorting DJI Inspire DNG photos

Question

I took some photos at sunset on March 10. Importing to Lightroom has been attempted on a Mac Pro and a MacBook Pro with the same results. Some photos are turned back (DJI_0008 & 35-46). Others get shaded purple in the overexposed areas (DJI_0006 and others).

The only thread I could find on this topic suggests there's no image in the raw data of the black pictures. That doesn't appear to be true. Please see the screenshots I took of the Lightroom import window. The photos appear as they were taken. The screenshots post-import show the changes. I could watch the thumbnails visibly change after import.

However, prior to importing, if I opened these photos in Preview or Photoshop, they also presented as black images.

Editing the photos in Lightroom does not recover or restore any of the image.

The "black" pictures were generally heavily underexposed in an attempt to keep the information from the sun and glare with the hope of bringing up the dark areas in editing. FYI, when checking the photos during flight in the DJI Go Fly app, the photos appeared as intended.

The MacBook Pro is on Big Sur 11.6.2. Lightroom Classic is on the 11.2 release.

johnrellis · Accepted Answer

Check that - the DNG attachment got blocked as well. Please try this: https://la.box.com/s/bv8oenkhxrzaas1184ul1cdi008x3w4f

Indeed, I see the same situation as in the other thread -- Rawdigger shows all the pixels have value 0 (black). Further, Exiftool shows bogus values for exposure:

[EXIF]          Exposure Time                   : 0
[EXIF]          F Number                        : 2.8
[EXIF]          Exposure Program                : Unknown (8176)
[EXIF]          ISO                             : 100
[EXIF]          Exif Version                    : 0230
[EXIF]          Date/Time Original              : 2022:03:10 17:19:21
[EXIF]          Create Date                     : 2022:03:10 17:19:21
[EXIF]          Shutter Speed Value             : 1
[EXIF]          Aperture Value                  : 2.6
[EXIF]          Exposure Compensation           : +0.7

A shutterspeed of 1 second, while Exposure Time is 0 (normally they are the same or very close).

Looks like an issue you should be taking up with DJI?

johnrellis · Answer

"Please see the screenshots I took of the Lightroom import window. The photos appear as they were taken. The screenshots post-import show the changes. I could watch the thumbnails visibly change after import.

However, prior to importing, if I opened these photos in Preview or Photoshop, they also presented as black images."

LR's import window shows the small preview JPEGs embedded in the DNGs. After they get imported, LR then tries to render the actual raw photo, which is why you see the thumbnails changing.

If you attach one of the black DNGs here, we can verify that its raw data is missing.

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