https://bugs.kde.org/show_bug.cgi?id=494302
Bug ID: 494302
Summary: Jxl thumbnails are unconditionally based on embedded
Exif preview
Classification: Applications
Product: digikam
Version: 8.5.0
Platform: Appimage
OS: Linux
Status: REPORTED
Severity: minor
Priority: NOR
Component: Thumbs-Image
Assignee: digikam-bugs-n...@kde.org
Reporter: paul_krause_1...@t-online.de
Target Milestone: ---
SUMMARY
Digikam creates thumbnails for Jxl images based on the embedded Exif metadata
preview (if any exists).
The user cannot change this behavior.
Depending on the Exif metadata, the thumbnail thus might be wrong, e.g.
outdated.
STEPS TO REPRODUCE
0. Make Digikam thumbnail some Jxl image. E.g.:
1. Start appimage on a clean system
2. Select a folder with Jxl images containing Exif preview image
OBSERVED RESULT
Digikam creates the thumbnails from the Exif metadata thumbnail/preview.
EXPECTED RESULT
Have an option, entry in the config file or similar to create the thumbnails
from the main image.
ADDITIONAL INFORMATION
Thumbnails for Jpg images, and probably other formats, are created from the
main image.
Full log on request.
Last relevant line appears to be:
Digikam::ThumbnailCreator::crateThumbnail: (...) from Embedded preview with
Exiv2
SOFTWARE/OS VERSIONS
digiKam-8.5.0-20241007T160120-Qt6-x86-64.appimage
Also appears on other versions of the 8.X series
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