Bug#822859: python-rgain: crash after upgrade gstreamer from 1.6.3-1 -> 1.8.1-1

[Simon McVittie]

Control: severity 822859 important

On Thu, 28 Apr 2016 at 14:40:32 +0200, Samuele Battarra wrote:
> Severity: grave
> Justification: renders package unusable

Inability to use replaygain on MP3 files is certainly annoying, but does
not make it unusable. I think it can still add gain correction to at least
Ogg Vorbis and FLAC files with the plugins that are hard dependencies.
With additional packages, it can also still handle MP3.

> Missing decoder: MPEG-1 Layer 3 (MP3) (audio/mpeg, mpegversion=(int)1, mpegaudioversion=(int)1, layer=(int)3, rate=(int)44100, channels=(int)2, parsed=(boolean)true)

I think that would be this gst-plugins-bad1.0 change:

    + debian/gstreamer-plugins-bad.install:
      - Drop mpg123 (moved to -ugly) [...]

This was upstream change <https://bugzilla.gnome.org/show_bug.cgi?id=719849>.

Decoding MP3s with GStreamer will now need either gstreamer1.0-plugins-ugly
(the potentially-patented plugin set), gstreamer1.0-libav (the kitchen sink),
or gstreamer1.0-fluendo-mp3. The Recommends on gstreamer1.0-plugins-bad
should be changed to one or more of those.

Gst maintainers: which plugin package(s) is/are the preferred thing to
put in Recommends for a package that expects to be able to decode MP3s?
The gnome-core metapackage depends on both gstreamer1.0-libav and
gstreamer1.0-plugins-ugly, so presumably one or both of those?

Thanks,
    S