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trevor98712893
Known Participant
December 10, 2024
Answered

Export: JPEG XL HDR export is attaching unexpected color profile and metadata

  • December 10, 2024
  • 3 replies
  • 1172 views

Trying to export images to HDR JPEG XL, but most of them are getting woldy inaccurate color profiles and metadata applied.

 

LR should export with the "Rec. ITU-R BT.2100 PQ" HDR color space, but these images are getting a color space of "QuickTime 'nclc' Video (9,1,2)". Have never seen this color profile before. Attempting to re-export the images will not resolve the issue.

This seems to occur with ~90% of the batch.

 

macOS 15.1.1 (24B91) with Lightroom Classic 14.0.1

 

[Moved from ‘Bugs’ to ‘Discussions’ by moderator, according to forum rules.]

Correct answer johnrellis

It's a Finder bug, as Johan surmised. When I use "jxlinfo" to examine such files exported by LR, I see a correct description of the Rec 2020 color space:

 

$ jxlinfo D300hSLI0100.jxl 
JPEG XL file format container (ISO/IEC 18181-2)
JPEG XL image, 4288x2848, lossy, 16-bit RGB
Color space: RGB, D65, Rec.2100 primaries, 709 transfer function, rendering intent: Perceptual
Uncompressed Exif metadata: 1452 bytes
Uncompressed xml  metadata: 14714 bytes

 

The "jxlinfo" app comes from libjxl, a widely used reference implementation of JPEG XL. Unfortunately, Exiftool doesn't fully support the JPEG XL format, since its developer objects to ISO's counter-productive policy of charging hundreds of dollars for the privilege of reading their specs.

 

In general, both Mac Finder and Windows Explorer can't be trusted to display metadata accurately.

3 replies

imaginative_thinking9965
imaginative_thinking9965
Participant
March 22, 2025

I am having this same issue with my JPG XL exports, but not my JPEG with HDR exports. I agree that  jxlinfo shows the correct color space. But when the file is opened in Preview or imported into Photos App, we see no HDR because of the quicktime color profile. I do wonder if this is an export issue in Lightroom, because earlier JPEG XL exports with HDR are just fine and show the correct colorspace, so how could it be a new Finder bug. Have you found any solution to get your JPEG XL photos to display HDR, or to correct the color profile on the exports? 

johnrellis
johnrellis
Legend
March 22, 2025

@imaginative_thinking9965, this thread is about the color profile included in the file. Your issue is different -- the visual appearance of HDR JXLs exported by LR.

 

Please start a new thread describing your issue in detail. 

johnrellis
johnrellisCorrect answer
Legend
December 10, 2024

It's a Finder bug, as Johan surmised. When I use "jxlinfo" to examine such files exported by LR, I see a correct description of the Rec 2020 color space:

 

$ jxlinfo D300hSLI0100.jxl 
JPEG XL file format container (ISO/IEC 18181-2)
JPEG XL image, 4288x2848, lossy, 16-bit RGB
Color space: RGB, D65, Rec.2100 primaries, 709 transfer function, rendering intent: Perceptual
Uncompressed Exif metadata: 1452 bytes
Uncompressed xml  metadata: 14714 bytes

 

The "jxlinfo" app comes from libjxl, a widely used reference implementation of JPEG XL. Unfortunately, Exiftool doesn't fully support the JPEG XL format, since its developer objects to ISO's counter-productive policy of charging hundreds of dollars for the privilege of reading their specs.

 

In general, both Mac Finder and Windows Explorer can't be trusted to display metadata accurately.

    T
    trevor98712893Author
    Known Participant
    December 11, 2024

    Perfect, thanks!

     

      JohanElzenga
      Community Expert
      JohanElzengaCommunity Expert
      Community Expert
      December 10, 2024

      I see this too, but I think this is more likely a glitch in the MacOS Finder info.

       

      -- Johan W. Elzenga
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