qt-avif-image-plugin

Qt plug-in to allow Qt and KDE based applications to read/write AVIF images.

Manual How to install AVIF support in KDE

What is AVIF?

AV1 Image File Format (AVIF) is an advanced image format specified by Alliance for Open Media.

AVIF is technically a picture compressed with AV1 video codec wrapped in ISO Base Media File Format.
AV1 compression provides significantly better efficiency than traditional JPEG. Beside 8bit per channel AVIF allows 10bit and 12bit depth, transparency, color profiles, metadata, animation, compression quality ranging from visually lossless to highly compressed lossy while maintaining decent visual quality at low bitrates.

1) Download

Download Latest Release and extract the content of the zip file:

unzip qt-avif-image-plugin-0.4.0.zip

Recommended: read README.txt

2) Adding MIME type

If you have shared-mime-info 2.0 or newer installed, you may skip this step. AVIF MIME type are installed already.

In order to install mime type image/avif in your system, copy (as root) qt-avif-image-plugin.xml file to /usr/share/mime/packages/ folder and run:

update-mime-database /usr/share/mime

3) Compile Qt Image Plugin

Qt Image Plugin allows Qt and KDE applications to open/save pictures in AVIF format. The plug-in uses libavif internally.
You need Qt5 development packages (for example qtbase5-dev), qmake, you may also need cmake and yasm.

If your system has libavif installed (version 0.8.2 or newer, check for the presence of /usr/include/avif/avif.h), run:

./build_libqavif_dynamic.sh

If you don't have libavif installed, run:

./build_libqavif_static.sh

Alternative way of building using cmake

This alternative requires extra-cmake-modules

mkdir build
cd build
cmake ..
make

Windows builds

MSYS2 platform

Use same steps like building under Linux.

Microsoft Visual Studio + Qt Creator

You need to prepare libaom.a and libavif.a before opening qt-avif-image-plugin_local-libavif.pro in Qt Creator.

Prepare libaom.a

Create folder ext\libavif\ext\aom\build.libavif\ and change to this folder.

Run C:\Qt\Tools\CMake_64\bin\cmake.exe -G "Visual Studio 16 2019" -DCMAKE_BUILD_TYPE=Release -DENABLE_DOCS=0 -DENABLE_EXAMPLES=0 -DENABLE_TESTDATA=0 -DENABLE_TESTS=0 -DENABLE_TOOLS=0 -DCONFIG_PIC=1 ..

cmake should create project files for Visual Studio. Now you can open AOM.sln

Go to Configuration Manager... and change (if necessary) Active solution configuration from Debug to Release.

Build Solution

Copy and rename ext\libavif\ext\aom\build.libavif\Release\aom.lib to ext\libavif\ext\aom\build.libavif\libaom.a

Prepare libavif.a

Create folder ext\libavif\build\ and change to this folder.

Run C:\Qt\Tools\CMake_64\bin\cmake.exe -G "Visual Studio 16 2019" -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=OFF -DAVIF_CODEC_AOM=ON -DAVIF_LOCAL_AOM=ON ..

cmake should create project files for Visual Studio. Now you can open libavif.sln

Go to Configuration Manager... and change (if necessary) Active solution configuration from Debug to Release.

Build Solution

Copy and rename ext\libavif\build\Release\avif.lib to ext\libavif\build\libavif.a

Open qt-avif-image-plugin_local-libavif.pro in Qt Creator

Build Project qt-avif-image-plugin_local-libavif

Plug-in is ready in plugins\imageformats\qavif.dll

4) Install libqavif.so

Copy libqavif.so to a folder where qt5-image-formats-plugins and/or kimageformats are installed. It could be one of these locations:

• /usr/lib/qt5/plugins/imageformats
• /usr/lib/qt/plugins/imageformats/
• /usr/lib/x86_64-linux-gnu/qt5/plugins/imageformats

5) Associate *.avif with applications

Qt based applications should be able to open AVIF images now.
Example how to associate AVIF file type with gwenview:

6) Enable AVIF thumbnails in dolphin file manager

Copy avif.desktop, avifs.desktop to:
/usr/share/kservices5/qimageioplugins/

Update imagethumbnail.desktop (in /usr/share/kservices5/ ):
Add ;image/avif to the MimeType= list:

AVIF thumbnails in dolphin:

7) Enjoy using AVIF in applications

gwenview

KolourPaint

nomacs

KPhotoAlbum

digiKam

qView

LXImage-Qt

qimgv

PhotoQt

Kanryu QuickViewer

VookiImageViewer