[vorbis] icecast2

[Marshall Eubanks]

Gregory Maxwell wrote:
> 
> On Tue, Mar 06, 2001 at 07:56:06PM +0100, Smörk wrote:
> > >Also there were rumors around a while back that icecast2 would support
> > >rtsp and possibly real. Is there any strength in these rumors?
> >
> > I'm not a icecast developer, but I think it's not unlikely that icecast
> > will support rtp. I don't see a reason why it should support RealMedia
> > streams? It's more likely, that there is is a Ogg/Vorbis plugin for the
> > RealPlayer.
> 
> 'rtsp' (what the orignal poster said) is in IETF standard (RFC 2326), not
> just some propritary RealMedia standard. That said, icecast doesn't support
> it, but most likely because it's overkill.
> 
> 'rtp' what you said, is also a IETF standard (1889).. Icecast doesn't do RTP
> because icecast is unicast (RTP is overkill for unicast and not widely used
> for that). Vorbis multicast (done by icecast or otherwise) will use RTP.
> 
>

RTP is useful for UDP, whether unicast or multicast. Any tcp based streaming
will be subject to TCP's slow start and congestion control, which causes the
annoying "rebuffering" of TCP unicast streaming. FWIW we plan to switch
our unicast streams to RTP/UDP in the near future.

There is no one RTP standard - it's really a meta-standard. See the AVT charter for
lot's of RTP info :
http://www.ietf.org/html.charters/avt-charter.html

RTSP requires a server - the client sends a command to the rtsp, which prepares
a file or other instructions to enable the client to get the stream. It
makes things like fail-over easier. See rfc2326

http://www.ietf.org/rfc/rfc2326.txt

                                   Regards
                                   Marshall Eubanks

   Multicast Technologies, Inc.
   10301 Democracy Lane, Suite 410
   Fairfax, Virginia 22030
   Phone : 703-293-9624          Fax     : 703-293-9609     
   e-mail : tme at on-the-i.com     http://www.on-the-i.com

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