-
This was the very first time I worked with QT.
I wanted to add support of the new AVIF image format to KDE apps.
I shared the source here: https://bugs.kde.org/show_bug.cgi?id=416941
The plug-in works on Linux, I haven't tried other platforms yet.
I would welcome suggestions/recommendations what to improve.
I want to add support for color profiles, in the future I will probably use QImage::Format_RGBA64 too as AVIF support 10bit and 12bit depth too.
Later in the future I wish to examine support for image sequences/animation. -
Hi and welcome to devnet,
Thanks !
-
May I ask, is there a chance that QT will officially support AVIF format in the future?
Support in QT automatically enables many applications to work with AVIF images:
This is a web browser from KDE which opened AVIF picture in website because it is a QT application:
I don't insist that any of future versions of my plug-in to be included, it can be any alternative implementation. The goal is to support AVIF. It seems that browsers will support this format and big players are interested too: Google, Netflix, Facebook (they are mentioning AVIF in the job offer).
You can open AVIF pictures in Windows10 if you installed AV1 Video Extension from Microsoft Store.I used libavif in my plug-in. Libavif needs at least one AV1 encoder and decoder. You can choose libaom, dav1d, rav1e, libgav1.
-
You should check with the KDE guys to avoid duplicating efforts. The Qt project has the qimageformats module for extra formats.
-
You should check with the KDE guys to avoid duplicating efforts. The Qt project has the qimageformats module for extra formats.
As I understood for KDE guys it doesn't matter whether AVIF is in kimageformats or in qtimageformats (I know it cannot be in both packages - they install in the same folder). KDE guys answered that it depends on license.
I don't create any additional restrictions beside mentioning license of dependencies I use.
I believe that including AVIF in qtimageformats would be the best for majority.
-
As they say, you have to check the licence(s) of the dependencies you use to ensure they are compatible with the Qt licences.
-
As they say, you have to check the licence(s) of the dependencies you use to ensure they are compatible with the Qt licences.
@SGaist
Yes, I checked the licenses:
libavif - https://github.com/AOMediaCodec/libavif/blob/master/LICENSE
libaom - https://aomedia.googlesource.com/aom/+/refs/heads/master/LICENSEThese licenses says no warranty, no liability, as-is. There is no restrictions for closed source, no open-source requirements. Only requirement is to retain&reproduce copyright notice of their permissive license.
It is like WEBP license and WEBP is included in qtimageformats already.
So I think it should be OK with https://www.qt.io/licensing/
-
Looks like it should be ok.
-
@fcarney
There are some patents but they are free to use. This URL is in AVIF specification:
http://aomedia.org/license/
A there you can find:
http://aomedia.org/license/patent-license/ -
Just letting you know that I continue to improve this AVIF format plug-in.
I will post it again when I finish with things on my TODO list.I want to say that I appreciate the fact that QColorSpace Class was introduced in Qt 5.14 - that's very important for correctly displaying images.
Maybe in the future it will be good to have direct support for modern WCG/HDR colorspaces with PQ & HLG TransferFunctions too. AVIF can use such colorspaces.
-
I create a new version of the plug-in.
I prepared an illustrated manual how to install the plug-in to KDE and how the applications are able to use the AVIF image format afterwards:
http://188.121.162.14/avif/kde.html
Download link with source (including build script and dependencies - libavif and libaom) are on the webpage too.The new version of the plug-in supports image sequences (animation) too.
I am willing to contribute this code to Qt. AVIF format is practically better than JPEG, GIF, PNG and WEBP together. I believe AVIF deserve to be supported. Many applications would benefit from AVIF if it gets included in Qt.
What can I do so the plug-in would be closer to get accepted by Qt?
-
I create a new version of the plug-in.
I prepared an illustrated manual how to install the plug-in to KDE and how the applications are able to use the AVIF image format afterwards:
http://188.121.162.14/avif/kde.html
Download link with source (including build script and dependencies - libavif and libaom) are on the webpage too.The new version of the plug-in supports image sequences (animation) too.
I am willing to contribute this code to Qt. AVIF format is practically better than JPEG, GIF, PNG and WEBP together. I believe AVIF deserve to be supported. Many applications would benefit from AVIF if it gets included in Qt.
What can I do so the plug-in would be closer to get accepted by Qt?
@novomeskyd said in My first QT imageformats plug-in for AV1 Image File Format (AVIF):
What can I do so the plug-in would be closer to get accepted by Qt?
Take a look at https://wiki.qt.io/Qt_Contribution_Guidelines
-
@novomeskyd said in My first QT imageformats plug-in for AV1 Image File Format (AVIF):
What can I do so the plug-in would be closer to get accepted by Qt?
Take a look at https://wiki.qt.io/Qt_Contribution_Guidelines
Thanks for info.
I still wish the AVIF support to be included in Qt in the future.
In order to get experiences and prepare myself for more complicated steps (from my point of view) I decided to host my project on GitHub ( https://github.com/novomesk/qt-avif-image-plugin ).
