[vorbis] Re: Website for Ogg/Vorbis support for MPEG4IP
mark.hetherington at studentmail.newcastle.edu.au
Sun Sep 8 22:57:51 PDT 2002
Ok, fair enough, but doesn't icecast just rebuffer if it gets too far behind?
Or is this the problem? Could icecast be modified to just send UDP packets?
It doesn't seem it would be too difficult to me, but I don't know icecast
specifics..... I guess I'll have to "RTFRFC" to see why RTP/RTSP makes UDP
work so well.....
On Lundo, la 9a de Septembro 2002 15:34, Akos Maroy wrote:
> The main problem of streaming through TCP is that it is a reliable
> transport: if packets are not recieved at the other end, they are
> resent. But with streaming content, this is usually not desirable,
> especially with live content. Since what would be resent is out of date
> anyway, it's better that it is lost. Moreover, the amount of data sent
> gets built up, since on top the new streamed data, there is the data to
> be resent.
> As a result, if the connection is unreliable, or cannot bear the width
> of the stream always, it is bound to break: in face of a glitch in the
> connection, there is more and more data sent then before, making things
> even worse. (I regularly get complaints from modem users, that a 24 kb/s
> stream always breaks for them.)
> RTP / RTSP are protocols based on UDP. UDP is an unreliable transport:
> of something sent was lost, then that data is lost. For streaming live
> content, this is actually desirable, as you have to keep up with the
> pace of the stream.
> What would be also very beneficial for icecast, is the implement
> peeling. This would enable easy downscaling of a stream if it turns out
> that the connection can not bear the full width of the stream.
> Icecast currently streams through HTTP, which is a TCP based protocol.
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