Icecast - Aug 2004 - UDP Vs. TCP

>That and the lack of Multicast deployement on most backbones/regional
networks.
>
>The other issue is that UDP tends to be a dumb protocol, especially when
>dealing with network congestion. It doesn't deal, where TCP has some
back-off
>mechanisms. Of course, where you are streaming something, that may be more
>detrimental depending on the b/w of the stream.
>
>-Steve
The broadcast doesn't need to leave our city and I work for a major ISP so
getting Multicasting or Mbone on our system would just take a little social
engineering. The streams need to be as small as possible, so low quality is
fine. I remember when I first started ripping CDs into MP3s, I saw this
scale with CD quality on top and its equivalent bitrate, then tape, then FM
radio and then finally AM radio. Is there something like that for Ogg
Vorbis? We only need FM radio quality. Is the packet handling stack for
IceCast modular? UDP would be nice and even a SSL method whould be
interesting.
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Shaun Mcmanus wrote:
> engineering. The streams need to be as small as possible, so low quality is
> fine. I remember when I first started ripping CDs into MP3s, I saw this
> scale with CD quality on top and its equivalent bitrate, then tape, then FM
> radio and then finally AM radio. Is there something like that for Ogg
> Vorbis? We only need FM radio quality. Is the packet handling stack for
Well, all this "CD quality" etc stuff is pretty subjective and mostly
based on marketing... it'd help more if you could tell more about your
desired target bitrate, or what you're used to from MP3's "FM radio
quality", e.g. what bitrate would that be?

Vorbis comes with quality levels, going from -1 to 10. The resulting
bitrate depends on the input format (e.g. whether you resample to
something lower than 44.1kHz, downmix to mono, etc) and to some extend
on the music you want to stream. Basically, Vorbis' quality levels allow
you to have, "AM", "FM" or "CD" quality and
everything inbetween, above
and below (at least with resampling).

I suggest some experimenting. oggenc' manpage and online-help are pretty
useful, as well as the vorbis@ list archive (thinking of a similar
thread not so long ago).

<p>Moritz
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