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From: Mick <michaelkintzios@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] libav and ffmpeg on the same computer issue once again
Date: Fri, 15 May 2015 19:51:52 +0100
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On Friday 15 May 2015 18:30:29 Alexander Kapshuk wrote:
> On Fri, May 15, 2015 at 9:04 AM, Gevisz <gevisz@gmail.com> wrote:
> > On Fri, 15 May 2015 01:45:35 -0400 Gregory Woodbury <redwolfe@gmail.com>
> >=20
> > wrote:
> > > I had a similar problem with some packages wanting virtual/ffmpeg and
> > > it wouldn't take the -libav USE flag without adding a keyword for
> > > ~amd64 on the virtual.
> > > (yes, I am going the opposite way from you, but the cause seem the
> > > same -- various USE flags are not yet adjusted in the stable
> > > branches.)
> > >=20
> > > Perhaps we need to request "stabilization" for some of the newer
> > > packages to solve this.
> >=20
> > Thank you for confirming that libav USE flag do not work not only for m=
e.
> >=20
> > However, it would be interesting to hear what the Gentoo devs think abo=
ut
> > this issue.
>=20
> Portage news item No 19 has the answer you're looking for.
>=20
> > eselect news read 19
> > 2015-04-16-ffmpeg-default
> >=20
> > Title FFmpeg default
> > Author Ben de Groot <yngwin@gentoo.org>
> > Posted 2015-04-16
> > Revision 1
> >=20
> > Since the choice between ffmpeg and libav has been made more
> > explicit, there has been a lot of discussion about what the
> > default implementation should be. It can be concluded that
> > media-video/ffmpeg has wider support, and would be somewhat
> > more convenient for most end-users.
> >=20
> > For this reason the default implementation has been switched
> > back from media-video/libav to media-video/ffmpeg by removing
> > the libav useflag from the base profile.
> >=20
> > If the libav useflag is already globally enabled or disabled
> > in /etc/portage/make.conf, then no further action is required.
> >=20
> > Users who implicitly relied on libav being enabled in their
> > profile, and who wish to continue using libav, should enable
> > USE=3Dlibav in their /etc/portage/make.conf file.
No, this is not yet 100% true, or at least not true for some packages, whic=
h=20
are also pulling in abi_x86_32 versions.
I came across this problem something like a week ago on a PC with no ffmpeg=
or=20
libav USE flags. I tried setting USE=3D"-libav" and also +ffmpeg, but coul=
dn't=20
fix the blockers. Eventually, I uninstalled the hard blockers like 'media-
libs/libpostproc' and then rebuilt any packages already installed which wer=
e=20
causing portage to complain/want libav. Can't recall fully which packages=
=20
these were, k3b springs to mind.
There may be a more scientific way of resolving the conflict, but that's ho=
w I=20
got around this problem.
HTH.
=2D-=20
Regards,
Mick
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