Okay, so here is how QT/KDE works… to some extent. Image support is on a system-wide basis, not per application.
To get AVIF support, I had to update ECM & Cmake, then install the qt5-avif-plugin. (This means compile all three). Well that did not work, so I compiled (again) Gwenview. Still did not work. [ASIDE] Ubuntu LTS can be a pain to have sometimes. By the time I am done with all my compiles, it will no longer be ubuntu! 😉😀😁 [/ASIDE] It turns out that the install script for the qt5 plugin did not put things in the places where they are supposed to be. So, I had to copy them manually to the correct locations. Voila!!! Gwenview works! …sorta kinda. No EXIF data since gwenview uses EXIV2 and not ExifTool. Exiv2 version 0.27.3 (and, if I understand correctly, version 0.28.0, when it comes out) does not have support for AVIF metadata. [ASIDE] I remember not so long ago, having to compile exiv2 version 0.27.x just so that I can see metadata in WebP files on my Ubuntu 18.04 LTS. [/ASIDE] Using ExifTool, I can see my EXIF and XMP metadata. (The XMP metadata, I had to copy into it from a JPEG JFIF file, using ExifTool). Thanks to Milos Komarcevic for pointing out that the only reason I have EXIF data in the AVIF files in the first place is because libavif handles the writing of the metadata to begin with, so Exiv2 is not involved. Sincerely, Karim Hosein Top Rock Photography 754.999.1652 On Fri, 5 Feb 2021 at 15:26, Top Rock Photography < ka...@toprockphotography.com> wrote: > Thank you, Patrick. > > That made me investigate. There exists an AVIF plugin for QT5. This plugin > requires ECM version 5.70.0 or greater. Ubuntu LTS (20.04) has version > 5.68.0. > > So two more compiles to try; first, ECM (Extra CMake Modules) version > 5.70.0 (or higher), then the qt5 AVIF plugin. Then Gwenview may work…. > > …Except that I may also have to bring KF5 (and all its parts) up to > version 5.70.0 (or higher), also. Currently they are at versions 5.68.0. > > I will let you know how that works out. > > Sincerely, > > Karim Hosein > Top Rock Photography > 754.999.1652 > > > > On Fri, 5 Feb 2021 at 13:56, Patrick Shanahan <p...@opensuse.org> wrote: > >> * Top Rock Photography <ka...@toprockphotography.com> [02-05-21 13:09]: >> > Okay, I compiled gwenview 20.12.2, and, during compilation, it seems >> that >> > it uses exiv2, and only recognises FITS, JPEG (JFIF/SPIFF ???), PNG, >> > SVG,TIFF, & WebP. No indication of AVIF support. >> > >> > Installed, and found no AVIF support. (& if it did, would not recognise >> the >> > metadata). >> > >> > Will try with Geeqie per Šarūnas Burdulis. >> > >> > Sincerely, >> > >> > Karim Hosein >> > Top Rock Photography >> > 754.999.1652 >> > >> > >> > >> > On Thu, 4 Feb 2021 at 20:24, Patrick Shanahan <p...@opensuse.org> >> wrote: >> > >> > > * Top Rock Photography <ka...@toprockphotography.com> [02-04-21 >> 19:44]: >> > > > Ah! Another compile for me. Ubuntu 20.04 LTS has Gwenview 19.12.3, >> and it >> > > > does not recognise AVIF files. I see that version 20.12.2 is out. I >> have >> > > > just downloaded it, and will try to compile it tomorrow. >> > > > >> > > > Thanks. >> > > > >> > > > P.s., does it use Exiv2 or ExifTool for metadata? I do have the >> latest >> > > > ExivTool with AVIF support. ;-) >> > > > >> > > > Sincerely, >> > > > >> > > > Karim Hosein >> > > > Top Rock Photography >> > > > 754.999.1652 >> > > > >> > > > >> > > > >> > > > On Thu, 4 Feb 2021 at 17:18, Patrick Shanahan <p...@opensuse.org> >> wrote: >> > > > >> > > > > >> > > > > >> > > > > gwenview displays avif files but not exif data. >> > > > > >> > > > > >> > > > >> > > >> > > appears libexiv2.so.27 (on openSUSE Tumbleweed). >> > > >> > > >> > > -- >> > > (paka)Patrick Shanahan Plainfield, Indiana, USA >> @ptilopteri >> > > http://en.opensuse.org openSUSE Community Member >> facebook/ptilopteri >> > > Photos: http://wahoo.no-ip.org/piwigo paka @ IRCnet >> freenode >> > > >> > > >> ____________________________________________________________________________ >> > > darktable user mailing list >> > > to unsubscribe send a mail to >> > > darktable-user+unsubscr...@lists.darktable.org >> > > >> > > >> > >> > >> ____________________________________________________________________________ >> > darktable user mailing list >> > to unsubscribe send a mail to >> darktable-user+unsubscr...@lists.darktable.org >> > >> >> >> works fine on openSUSE Tumbleweed! >> -- >> (paka)Patrick Shanahan Plainfield, Indiana, USA @ptilopteri >> http://en.opensuse.org openSUSE Community Member >> facebook/ptilopteri >> Photos: http://wahoo.no-ip.org/piwigo paka @ IRCnet >> freenode >> >> ____________________________________________________________________________ >> darktable user mailing list >> to unsubscribe send a mail to >> darktable-user+unsubscr...@lists.darktable.org >> >> ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
