Re: Status of AVIF support in Fedora

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On Sat, 2023-02-25 at 10:27 -0500, Neal Gompa wrote:
> On Sat, Feb 25, 2023 at 10:20 AM Sandro <lists@xxxxxxxxxxxxx> wrote:
> > 
> > Greetings everyone,
> > 
> > TL;DR
> > Will there be AVIF (AV1) support for applications using libheif in
> > Fedora?
> > 
> > A while ago I stumbled upon AVIF files not being supported by
> > applications (gThumb, ImageMagick, GIMP) in Fedora [1].
> > 
> > It appears that the applications mentioned have switched to libheif
> > for
> > AVIF support in favor of libavif. Since libheif also
> > provides/requires
> > patent encumbered libraries/codecs (libde265) related to HEIF it is
> > provided by RPMFusion.
> > 
> > AVIF, however, is not encumbered by patents as I understand it [2].
> > So
> > it seems we need a compatibility libheif-av1 or the like to allow
> > applications provided by fedora repos to enable AVIF (AV1) support
> > using
> > libheif [3].
> > 
> > I found two threads ([4],[5]) in the archives regarding HEIF and
> > AVIF.
> > But none of them are conclusive with regards to enabling AVIF
> > support.
> > 
> > Are there any plans to enable AVIF support in applications that use
> > libheif as their provider? If so, where can I find information
> > regarding
> > the status?
> > 
> > I apologize in advance if any of the above is not entirely correct
> > (or
> > entirely incorrect). Aim of my message is to better understand why
> > support for AVIF is lacking in some applications and if that can be
> > fixed.
> > 
> > [1] https://bugzilla.redhat.com/show_bug.cgi?id=2165606
> > [2] https://bugzilla.redhat.com/show_bug.cgi?id=2164329#c3
> > [3] This part is not entirely clear to me. Please correct me.
> > [4]
> > https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx/thread/TVMTMXKBMG2W3P5WSRS7REQA3DBMEZ7V/#RADV6GV7YUGPZSZZU66TQE4AQMGYUCJA
> > [5]
> > https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx/thread/ARY6HUSX7TMOUXBZ4WBOZB4P7TDEJHAI/#4454J7SUYZNPDGOD6PJ7V3PH6WQW5QTH
> > 
> 
> It looks like libheif now supports a plugin architecture, so we could
> move libheif to Fedora, while having the HEVC/H.265 backend plugin in
> RPM Fusion.
> 
> Also, according to the CMake, the HEVC/H.265 plugins are not built by
> default anymore:
> https://github.com/strukturag/libheif/blob/cdcc5b210879e0a0348032a594f8be52bb739c0d/CMakeLists.txt#L92-L98
> 
> So feel free to package it and bring it into Fedora. :)

So we can build libheif without H.265 on Fedora but how you propose
make H.265 available with one third repo ? just build the plugin on
third repo as a freeworld package ? 

Thanks 

> -- 
> 真実はいつも一つ!/ Always, there's only one truth!
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-- 
Sérgio M. B.
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