https://bugs.kde.org/show_bug.cgi?id=451374

            Bug ID: 451374
           Summary: When changing image orientation to portrait in DNG
                    file, the change does not seem to get written to file
                    metadata.
           Product: digikam
           Version: 7.5.0
          Platform: Microsoft Windows
                OS: Microsoft Windows
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: Metadata-Orientation
          Assignee: digikam-bugs-n...@kde.org
          Reporter: jto...@gmail.com
  Target Milestone: ---

Created attachment 147426
  --> https://bugs.kde.org/attachment.cgi?id=147426&action=edit
Relevant settings.

SUMMARY
The orientation/write flag to metadata -setting is enabled. When changing DNG
file from landscape to portrait, the modified-timestamp of the file changes,
but Exiftool still reports Orientation : Horizontal (normal). So, apparently,
SOMETHING is written to the file, but not the orientation value. 

STEPS TO REPRODUCE
1. Open DNG file
2. Rotate right
3. Check Orientation: metadata field with Exiftool, it still says: Horizontal
(normal).

OBSERVED RESULT
When rotating a DNG, the rotation information does not seem to get saved in
file metadata.

EXPECTED RESULT
It ought to be saved to file metadata.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
I tried creating a copy of rotated (portrait) DNG file to different directory,
and digiKam displays it in landscape, which verifies that orientation metadata
was NOT written to file. I think digiKam displays the original file in portrait
orientation, because it has saved the orientation to its own database, but it
does NOT seem to get saved into the actual file, which means that other
software show it in incorrect (original, landscape) orientation.

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