@flan_suse: sorry for the very late reply. You're right, I actually spotted this a while back but didn't find the motivation to make the move. I was a little concerned that I might miss updates, but there are some pretty reactive people reporting new versions here so that should be fine. There will still be issues when Pierre decides to change an already released tar (it happened again recently), but this is fortunately not anywhere as frequent as regular updates. I'll make the switch for this package and xnviewmp-system-libs now.
@Corax, interestingly, but the crash is not present on this updated xnviewmp archive. Version 1.4.0.2 was crashed once you try to open GPS map window in the picture properties.And since the XnViewMP is bundled with Qt 5.15.11, I supposed that the crash was caused by the Qt version mix (the Arch Linux Qt5 is 5.15.7).
XnViewMP ist nicht in den offiziellen Paketquellen enthalten. Daher muss man auf Fremdpakete des Entwicklers ausweichen.Auf der Projektseite ?? finden sich aktuelle Pakete. Dort lädt man das entsprechende .deb-Paket für die eigene Rechnerarchitektur (32-/64-Bit) (z.B. XnViewMP-linux-x64.deb) herunter und installiert es manuell [2].
Please consider to add update information to the XnViewMP AppImage and ship a .zsync file so that it can be updated using AppImageUpdate. Tools like appimagetool and linuxdeployqt can do this for you easily.
I recently tested most of the products named here in search for a quick functional viewer, preferably able to start swiftly and full-screen when invoked, capable of displaying new(ish) formats like GIF (animated), WEBP, APNG or RAW and came away sorely disappointed. In comparison with the range on offer in Windows (Imagine, Nexus Viewer, Qview, or qimgv, just to name a few good free ones), the scene linuxside looks pretty bleak.