[Bug 2144330] [NEW] Thumbnails from .avif are distorted

[corrado venturini]

Public bug reported:

From shotwell or gthumb I save an image in .avif format. Thumbnails view from 
nautilus are distorted.
corrado@corrado-n6-rr-0310:~$ apt list shotwell
shotwell/resolute,now 0.32.13-2ubuntu1 amd64 [installed,automatic]
corrado@corrado-n6-rr-0310:~$ apt list gthumb
gthumb/resolute,now 3:3.12.10-1 amd64 [installed]
corrado@corrado-n6-rr-0310:~$ apt list nautilus
nautilus/resolute,now 1:50~rc-0ubuntu1 amd64 [installed,automatic]
corrado@corrado-n6-rr-0310:~$

ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: nautilus 1:50~rc-0ubuntu1
ProcVersionSignature: Ubuntu 6.19.0-9.9-generic 6.19.5
Uname: Linux 6.19.0-9-generic x86_64
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Fri Mar 13 15:15:26 2026
GsettingsChanges:
 b'org.gnome.nautilus.icon-view' b'default-zoom-level' b"'extra-large'"
 b'org.gnome.nautilus.preferences' b'migrated-gtk-settings' b'true'
 b'org.gnome.nautilus.window-state' b'initial-size' b'(1655, 692)'
 b'org.gnome.nautilus.window-state' b'initial-size-file-chooser' b'(907, 635)'
InstallationDate: Installed on 2026-03-10 (3 days ago)
InstallationMedia: Ubuntu 26.04 LTS "Resolute Raccoon" - Daily amd64 (20260310)
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
SourcePackage: nautilus
UpgradeStatus: No upgrade log present (probably fresh install)
usr_lib_nautilus:
 file-roller              44.6-3
 nautilus-image-converter 0.4.0-3
 papers                   50~beta-0ubuntu2

** Affects: nautilus (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug resolute wayland-session

** Attachment added: "Screenshot From 2026-03-13 15-02-56.png"
   
https://bugs.launchpad.net/bugs/2144330/+attachment/5951748/+files/Screenshot%20From%202026-03-13%2015-02-56.png

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Title:
  Thumbnails from .avif are distorted

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