Re: [gentoo-dev] RFC News item: FFmpeg default

[Ben de Groot]

On 30 March 2015 at 00:23, Michał Górny <mgorny@g.o> wrote:
> Dnia 2015-03-30, o godz. 00:07:16
>
> Include example code.
>

Updated version:

Title: FFmpeg default
Author: Ben de Groot <yngwin@g.o>
Content-Type: text/plain
Posted: 2015-04-07
Revision: 1
News-Item-Format: 1.0
Display-If-Installed: media-video/ffmpeg
Display-If-Installed: media-video/libav

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.

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.

If the libav useflag is already globally enabled or disabled
in /etc/portage/make.conf, then no further action is required.

Users who implicitly relied on libav being enabled in their
profile, and who wish to continue using libav, should enable
USE=libav in their /etc/portage/make.conf file.

> Also please prepare an update to the USE=libav news item to state
> updated default.

Diff:

--- /var/portage/metadata/news/2015-02-01-use-libav/2015-02-01-use-libav.en.txt
2015-02-04 05:31:20.000000000 +0800
+++ /home/ben/tmp/2015-02-01-use-libav.en.txt   2015-04-06
14:05:56.982039939 +0800
@@ -2,7 +2,7 @@
 Author: Michał Górny <mgorny@g.o>
 Content-Type: text/plain
 Posted: 2015-02-01
-Revision: 1
+Revision: 2
 News-Item-Format: 1.0
 Display-If-Installed: media-video/ffmpeg
 Display-If-Installed: media-video/libav
@@ -20,17 +20,17 @@
 However, whenever appropriate additional USE=libav will be introduced to
 control the preference of one implementation over the other.

-Users who currently use libav (the Gentoo default) do not have to
-perform any action since USE=libav is enabled by default. It should be
-noted that the users still need to enable USE=ffmpeg on packages with
-optional libav support as well. Users who want to use ffmpeg instead
-need to specify USE=-libav in make.conf explicitly.
+Users who currently use libav need to enable USE=libav in
+/etc/portage/make.conf. It should be noted that users still need to
+enable USE=ffmpeg on packages with optional libav support as well.
+Users who currently use ffmpeg need to take no action.

 Please also note that some packages support only one of the two
 implementations. An attempt to install one of those packages may result
 in blockers requiring the user changes the global USE=libav state.
 The most notable example of such package is media-video/mplayer.
-media-video/mpv may be used as a replacement for users who prefer libav.
+media-video/mpv may be used as a replacement for users who prefer libav,
+even though upstream mpv developers recommend using ffmpeg.

 Please do not alter the state of 'libav' flag on a per-package basis
 (e.g. via package.use). The flag needs to be set globally to have


-- 
Cheers,

Ben | yngwin
Gentoo developer