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[Thucydides411 <57797@xxxxxxxxxxxxxxxxxx>]

> Also, according to listening tests, opus is known to be better than
vorbis in every tested scenario, see:
http://jmspeex.livejournal.com/13547.html

I can say from the experience of ABX testing classical music at low
bitrates, 32 kb/s to 64 kb/s, that there's basically no comparison
between AoTuV and Opus, in that AoTuV performs vastly better. That can
be important for devices with limited storage, like smartphones. I know
Xiph consistently claims Opus to be superior, but I've had a very
different experience with the music I've tested, and in any case, this
isn't a question of Opus vs. AoTuV. This is a question of the latest
AoTuV vs. an old version, and we know which is better.

I understand that getting the patch applied upstream would be preferred,
but realistically, that's not going to happen. This has been a known
issue in Debian for years, and nothing has been done about it. It's a
simple enough patch to apply that I would say Ubuntu should just go
ahead and do it.

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Packages, which is subscribed to libvorbis in Ubuntu.
https://bugs.launchpad.net/bugs/57797

Title:
  include aoTuV patch

Status in Medibuntu:
  Invalid
Status in Ogg Vorbis:
  Confirmed
Status in “libvorbis” package in Ubuntu:
  Confirmed
Status in “libvorbis” package in Debian:
  Fix Released

Bug description:
  Would be nice to include aoTuV [1] Release 1 patch to libvorbis. aoTuV is an improved libvorbis encoder, that, while keeping ABI compatibility, gives many improvement:
  * better quality at all bitrates versus libvorbis-1.1.2 [2], giving aoTuV better quality than other codec (AAC, MP3, MPC, WMA, ...) [3];
  * support of quality down to -2 (32kb/s at 44kHz stereo), versus -1 (45kb/s at 44kHz stereo) of libvorbis-1.1.x;
  * encoding speed 10% better thanks to the included Vorbis-OptSort patch (improve ordering loop);

  aoTuV Release 1 have just been releases. aoTuV Release 1 is the same
  as of beta4.51 (released on 2005-11), renamed after a lot of testing
  of the audio community (especially on hydrogenaudio forum [4]) and
  this is the reccomended vorbis encoder [5].

  [1] aoTuV site: http://www.geocities.jp/aoyoume/aotuv/
  [2] comparison of aoTuV beta 4 vs libvorbis-1.1.x: http://wiki.xiph.org/index.php/VorbisEncoders
  [3] Wikipedia test of vorbis vs other codecs: http://en.wikipedia.org/wiki/Vorbis#Codec_comparisons
  [4] hydrogenaudio forum: http://www.hydrogenaudio.org
  [5] Recommended Ogg Vorbis: http://wiki.hydrogenaudio.org/index.php?title=Recommended_Ogg_Vorbis

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