[Therion] Progressive coded JPG files??

[Jonny Prouty]

Hi Bill,

I don't have a solution for you, but I do have a similar install in case it
help. I'm also on Fedora 42, and I just tested, I can load into
xtherion without issue both progressive and non-progressive JPGs. I am
using therion-6.3.4-1.fc41.x86_64, which I believe comes from the
jmbegley COPR repository.

The rpm I have installed requires libjpeg:
rpm -qR therion | grep jpeg
libjpeg.so.62()(64bit)
libjpeg.so.62(LIBJPEG_6.2)(64bit)

This library, libjpeg.so.62 is provided by libjpeg-turbo on my machine of
which I have a slightly older version than you (3.0.2 vs 3.1.0):

rpm -q --whatprovides libjpeg.so.62
libjpeg-turbo-3.0.2-3.fc41.i686

Here are other jpeg related packages I have installed, in case it helps:
rpm -qa | grep jpeg
libjpeg-turbo-3.0.2-3.fc41.x86_64
libjpeg-turbo-utils-3.0.2-3.fc41.x86_64
mjpegtools-libs-2.2.1-7.fc41.x86_64
openjpeg-2.5.3-6.fc41.x86_64
libjpeg-turbo-3.0.2-3.fc41.i686
libnvjpeg-12-8-12.3.5.92-1.x86_64
libnvjpeg-devel-12-8-12.3.5.92-1.x86_64
mingw64-libjpeg-turbo-3.0.2-3.fc41.noarch
mingw32-libjpeg-turbo-3.0.2-3.fc41.noarch
libnvjpeg-12-9-12.4.0.76-1.x86_64
libnvjpeg-devel-12-9-12.4.0.76-1.x86_64
jpeginfo-1.7.1-4.fc41.x86_64

Let me know if you want me to check anything else on my machine, I'm happy
to help.

Best of luck,
Jonny

On Tue, Aug 19, 2025 at 9:35 AM Bill Gee <bgee at campercaver.net> wrote:

> Hello everyone - This has been annoying me for a bit.  Today I
> discovered it is actually a big problem.
>
> For the past few months - I do not remember exactly how long - When I
> add a background to a th2 file, I get a message about unable to load the
> file.  Screen shot attached.  For new th2 files I have got around it by
> using magick to convert the background images to PNG files.  Easy and
> quick, though annoying that it has to be done at all.  Many of those
> images come from a friend who scans the paper through a flatbed.  He
> uses Windows, and I just assumed something about his scanner software
> was wonky.
>
> Today I went back to some stuff I last worked on several years ago.  The
> th2 file failed to open the background.  The message said the file was
> not available.  I removed the background image and tried to reload it.
> BAM!  I get the same message about unable to load and asking if the file
> is a progressive JPG!  These background images did not come from my
> friend's scanner.  They came from a 25 year old camera.  Some are PDF
> files converted to JPG and others come from my flatbed scanner using xsane.
>
> These are files that worked several years ago.  I have not changed them.
>   Trying some other stuff ...  It appears that xTherion will no longer
> load ANY jpg file.  The question about progressive format is bogus.
>
> Does anyone have any idea what is going on?
>
> Yeah, I could go back and convert thousands of background images from
> all the maps I have worked on.  It would take days to find and update
> all of them, and all the th2 files as well.  But dang it - This should
> Just Work!  And what happens if PNG files stop working, too??
>
> The system is Fedora 42.  Therion is 6.3.4+dev, compiled back in April.
> I have several jpeg libraries installed:
>
> root at main2:~# rpm -qa | grep jpeg
> libjpeg-turbo-3.1.0-2.fc42.x86_64
> openjpeg-2.5.3-6.fc42.x86_64
> turbojpeg-3.1.0-2.fc42.x86_64
> openjpeg-tools-2.5.3-6.fc42.x86_64
> libjpeg-turbo-utils-3.1.0-2.fc42.x86_64
> libjpeg-turbo-devel-3.1.0-2.fc42.x86_64
> openjpeg-devel-2.5.3-6.fc42.x86_64
> jpeginfo-1.7.1-6.fc42.x86_64
> jpegoptim-1.5.5-6.fc42.x86_64
> mjpegtools-libs-2.2.1-8.fc42.x86_64
>
> I ran jpeginfo -i across some of these files.  According to jpeginfo,
> they are NOT progressive format, as shown by the 'N' right after the bit
> depth:
>
> 2021_04_01 SHN-017 CAVE SPRING CAVE PLAN VIEW X23-X26.JPG 1686 x 2952
> 24bit N JFIF,ICC                 Huffman,300dpi       1487615
>
>
> Thanks!
> --
> ===============
> Bill Gee
> _______________________________________________
> Therion mailing list
> Therion at speleo.sk
> https://mailman.speleo.sk/listinfo/therion
>
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