[Icecast] Opus vs. Vorbis

[José Luis Artuch]

El dom, 09-06-2013 a las 08:19 +0000, "Thomas B. Rücker" escribió:
> On 05/31/2013 04:48 PM, Gagarin Miljkovich wrote:
> 
> > Hello Dennis!
> > 
> > Please send me the links to your streams. I'm interested in the
> > audioquality.
> 
> You can also check out:
> http://dir.xiph.org/by_format/Opus

Hi Thomas
Very interesting. One question about *Bitrate scalability*: Does the
change from mono to stereo is keeping the same bandwidth (20 kHz) ?.
> 
> Best regards
> 
> Thomas B. Ruecker
> 
> > Dennis Heerema <Dennis at Heerema.net> wrote: 
> >         Hello Jordan,
> >         
> >         I run a test stream in OPUS format.
> >         I find the quality of OPUS way better at low bitrates then VORBIS.
> >         Thus better quality at lower bitrates, but also on higher bitrates the
> >         codec sounds good.
> >         
> >         Latency is lower, but for broadcasting a radio program for me at the
> >         moment it is not that importend, so i did not test that really with
> >         icecast (i did test opus low latency but with other applications:
> >         fideliphone and teamtalk)
> >         
> >         Stream runs stable, my stream is a transcode made by Liquidsoap, from a
> >         transparent ogg vorbis stream (The reason i'm doing that is because i'm
> >         transcoing also to  mp3, vorbis aacplus at different bitrates).
> >         
> >         Input is a live stream from a studio to my main icecast server, on this
> >         server i transcode with liquidsoap. Then every stream is relayed by two
> >         public ic
> >          ecast
> >         servers where listener clients connect to.
> >         
> >         Running this for quite a while now and it is stable for all streams.
> >         
> >         The is one downside on OPUS at the moment, there are not that much
> >         clients able to play opus, plus on track change the stream makes a
> >         little frame noticeable dropout. I do not know wheather this is cased by
> >         liquidsoap or the player.
> >         
> >         The quys from liquidsoap say it is a problem how the player implemented
> >         the opus codec (VLC).
> >         
> >         If you want, you can listen to my (dutch streams, day hours non stop
> >         music, evenings programms hosted by a announcer) streams, send my a
> >         private message and i will send you al my diffrent stream links, so you
> >         can compare.
> >         
> >         Kind regards,
> >         
> >         Dennis
> >         
> >         
> >         
> >         
> >         Op 31-5-2013 16:43, TheDarkener schreef:
> >                 Hi all,
> >                 <
> >                  br
> >                 />I've been looking at opus lately as a replacement to vorbis and it sure
> >                 seems to me that, at least on paper, it is the 'next generation'
> >                 streaming codec. Has anyone been using opus as a streaming codec to
> >                 Icecast? If so, how do the following general characteristics compare to
> >                 vorbis?
> >                 
> >                 + Quality
> >                 + Latency
> >                 + Bandwidth
> >                 + Performance (on stream client and Icecast server)
> >                 + Stability
> >                 
> >                 Also, what use case in your setup (voice only, music, pre-recorded files
> >                 vs. live input, ?) Any input is greatly appreciated. I understand there
> >                 is little support (compared to vorbis, anyway) for opus, but I'm hoping
> >                 to help change that at least a little bit.
> >                 
> >                 
> >                 Cheers,
> >                 Jordan
> >         
> >         
> >         
> >         
> >         ____________________________________________________________
> >         
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> >         Icecast at xiph.org
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> > 
> > 
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