Select provider of libav* libraries

[Reinhard Tartler]

On Jun 18, 2015 7:15 PM, "Andreas Cadhalpun" <
andreas.cadhalpun at googlemail.com> wrote:
>
> Hi,
>
> On 18.06.2015 18:57, Bálint Réczey wrote:
> > 2015-06-09 21:53 GMT+02:00 Andreas Cadhalpun <
andreas.cadhalpun at googlemail.com>:
> >> I have now implemented this and it works fine.
> >> It's in the extra branch of the ffmpeg git repository [1].
> > I have tested the branch and it works nicely for me.
>
> Thanks for testing it. :)
>
> > Is there any other open issue?
>
> The altivec optimizations on powerpc are still disabled, but I don't think
> this should delay the transition. I intend to fix this one way or another
> before stretch is released anyway.

That is something that the libav package handles just fine. May I ask how
you intend to address the altivec issue?

The new packaging for sure builds faster, but is build time really a
problem?

> And currently FFmpeg 2.7 failed to build on ppc64 (due to changes in
configure,
> fixed upstream) and sparc (unaligned access causing SIGBUS, problem has
been
> there for ages, but the test coverage increased recently, patch sent
upstream).
> I expect FFmpeg 2.7.1 will fix those, so once that is in unstable, it
would
> be a good time to upload the package for the transition to experimental.

I'm not sure if we had consensus on what packaging should be used.

> > I would happily sponsor an upload to
> > experimental with the new -extra package possibly with also providing
> > libav-dev and friends to if libav maintainers agree and we decide to
> > start the transition.
> > Any thoughts?

In the new packaging, libavcodec-extra is a virtual package, while the
jessie shipped with a real package. How will that play with backports, that
is, is there any chance that apt would prefer the libavcodec-extra package
that drags in the old packages over the libavcodec-extra-NN package, which
provides libavcodec-extra?

Best,
Reinhard

Reinhard
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