[icecast] bitrate for slow modems

un un at king.dom.de
Thu Apr 5 15:23:11 PDT 2001



Kelly Lee Myers:
> Depending on what you are broadcasting, for 28.8 I would go 16kbps and be
> really safe...

well, you could consider not broadcasting at all, that would be 0kbps,
and would fit my 9,6kbps gsm connection
;) scnr
uno

> ----- Original Message -----
> From: "John Griffiths" <john at capmon.com>
> To: <icecast at xiph.org>
> Cc: <icecast at xiph.org>
> Sent: Thursday, April 05, 2001 3:12 PM
> Subject: [icecast] bitrate for slow modems
> 
> 
> > ok so 24kbps for 56k modems...
> >
> > can i go any lower and get the 28 k modems? (still a lot of them about) or
> will 24 be good enough fo that?
> >
> > At 04:57 PM 4/4/2001 -0700, Jack Moffitt wrote:
> > >> >
> > >> > the bitrate on the mp3's is 128 (great for listening off the HD)
> > >> >
> > >> > whats a good bitrate to encode for streaming audio?
> > >>
> > >> I think this might be the problem 128kbps isn't going to work over a
> modem.
> > >>
> > >> I think 24kbps is probably the pratical limit for 56k modems. 56k
> modems might
> > >> be able to get a 32kbps stream but only under optimal conditions.
> > >
> > >I believe he said the outgoing stream was two 128k ISDN lines, which
> > >from my ISDN memory I remember as actually having a 112k throughput (the
> > >other channel being used for signalling, etc).  Since you can only push
> > >packets out one at a time with a single tcp connection (i think) 128 is
> > >definately not going to make it out, even if the one possible listener
> > >could receive data that fast.
> > >
> > >So a lower bitrate is most certainly necessary.  24kbps is a good one to
> > >choose if you're interested in modem listeners.  A lot of people like
> > >56k but I don't think they realize that most people with 56k modems get
> > >more like 40k throughput or so.  I think going higher than 100k is
> > >fairly wasteful.

--- >8 ----
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