https://bugs.kde.org/show_bug.cgi?id=466005
Bug ID: 466005
Summary: Add a base tool to BQM to transcode jpg to jxl (and
vice versa) [transcode is different from convert)
Classification: Applications
Product: digikam
Version: 8.0.0
Platform: Manjaro
OS: Linux
Status: REPORTED
Severity: wishlist
Priority: NOR
Component: BatchQueueManager-Core
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
The new JPEG-XL format (.jxl) supported by Digikam allow to "transcode" a file
pic.jpg to pic.jxl file a way that you can restore pic.jpg from pic.jxl. To do
that we need to "transcode" the jpeg file instead of to convert it.
The related command line are :
cjxl -d 0 pic.jpg pic.jxl /* the resulting file size is 20% smaller
djxl pic.jxl pic2.jpg /* pic2.jpg is binary identical to pic.jpg (so
there is retro-compatibility)
The Batch Queue Manager allows to convert jpeg files to Jxl format but it
converts, it don't transcode, so the resulting jxl files don't allow to
eventually restore the jpeg as it was. This retro-compatibility is one of the
capacities of the JPEG Consortium put forward to promote the format.
The request is to add a transcode base tool into BQM using the commands above
(or similar if others exist) : cjxl -d 0 for jxl -> jpg and djxl for jpg ->
jxl.
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