JxrDecApp included in calibre fails for some images

[John Howell]

JPEG-XR is used in books delivered in KFX format by Amazon to e-ink Kindles.

The version of JxrDecApp included with calibre 3.28 (x64 Windows) fails to convert some JPEG-XR images.

The same images convert without error using a copy of JxrDecApp that I compiled years ago from the jxrlib 1.1 source using VS 11.

I am attaching a zip containing two sample images that fail and two that succeed, along with my version of JxrDecApp that works for all of these images.

JxrDecApp-working -i fail1.jxr -o image.bmp
Yields a bmp file with the content of the original image.

JxrDecApp-calibre -i fail1.jxr -o image.bmp
Prints the help screen and exits, leaving an empty bmp file.

[Kovid Goyal (kovid)]

Not sure what I can do about this. calibre must include only compiled from source components. The version of jxrlib bundled with calibre comes from https://mirrorservice.org/sites/ftp.debian.org/debian/pool/main/j/jxrlib/jxrlib_1.1.orig.tar.gz

If you have an updated source link, I will be happy to update the bundled version to use that.

[Eli Schwartz (eschwartz)]

This file converts fine for me on Arch Linux.

FWIW we have a jxrlib 2.0 package, which comes from
https://github.com/glencoesoftware/jxrlib

[Kovid Goyal (kovid)]

I can probably look into upgrading the bundled calibre version, assuming
building it is not too much of a headache.

[Kovid Goyal (kovid)]

I have updated the version of jxrlib bundled with calibre to 0.2.1
which is the latest available.

 status fixreleased

[John Howell (jhowell-o)]

Thank you.