Re: Status of AVIF support in Fedora

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On Mon, Feb 27, 2023 at 10:04 AM Sérgio Basto <sergio@xxxxxxxxxx> wrote:
>
> 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 ?
>

It may be possible to build the plugin independently and link to
libheif, but at the minimum, that's what I expect.




--
真実はいつも一つ!/ Always, there's only one truth!
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