Bug 481221

Summary:	Question about transcoding JPEG to JPEGXL (JPG to JXL)
Product:	[Applications] digikam	Reporter:	Rafael Linux User <rafael.linux.user>
Component:	Plugin-Bqm-Convert	Assignee:	Digikam Developers <digikam-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	metzpinguin
Priority:	NOR
Version First Reported In:	8.2.0
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Rafael Linux User 2024-02-11 13:02:32 UTC

SUMMARY
I’m recoding my TIFF files to JXL with Digikam. I want to do the same with my JPG files, however, before doing it, I have a question, related to re-encoding.

cjxl command line tool from libjxl let users to losslessly transcode JPEG images into JPEG XL. Transcoding preserves the already-lossy compression data from the original JPEG image without any quality loss caused by re-encoding, while making the file size smaller than the original, so my question is what library is using Digikam to transcode JPG to JXL?

Thank you

Comment 1 Maik Qualmann 2024-02-11 13:24:55 UTC


*** This bug has been marked as a duplicate of bug 466005 ***

Comment 2 Maik Qualmann 2024-02-11 13:26:20 UTC

Currently we load the image and save it as JXL. I would never convert my JPG files to JXL.

Maik