generating thumbnails for video files doesn't work on Fedora 43. It looks like the thumbnailer internally uses gdk-pixbuf2, which launches a glycin loader, but this fails: Sep 14 00:08:00 fedora nautilus[9048]: totem-video-thumbnailer couldn't write the thumbnail '/tmp/gnome-desktop-thumbnailer.png' for video 'file:///tmp/gnome-desktop-file-to-thumbnail.webm': Loader process exited early with status '1'Command: Sep 14 00:08:00 fedora nautilus[9048]: "bwrap" "--unshare-all" "--die-with-parent" "--chdir" "/" "--ro-bind" "/usr" "/usr" "--dev" "/dev" "--ro-bind-try" "/etc/ld.so.cache" "/etc/ld.so.cache" "--ro-bind-try" "/nix/store" "/nix/store" "--tmpfs" "/tmp-home" "--tmpfs" "/tmp-run" "--clearenv" "--setenv" "HOME" "/tmp-home" "--setenv" "XDG_RUNTIME_DIR" "/tmp-run" "--symlink" "/usr/lib" "/lib" "--symlink" "/usr/lib64" "/lib64" "--seccomp" "9" "/usr/libexec/glycin-loaders/2+/glycin-image-rs" "--dbus-fd" "8" Launching the thumbnailer from the command line (like below) fails with a lot of SELinux denials instead: $ totem-video-thumbnailer --size 64 test.webm output.png I suspect that the double-sandboxing between gnome-desktop and glycin just doesn't work. Reproducible: Always
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This was resolved by changes in gdk-pixbuf2 / glycin.