[streaming] Re: DVB channel multicasted using RTSP

[Matthew Geier]

>>>  Changing channel is sort of easy - you multicast em all, and the user
>>>changes multicast groups to change channels. Especially easy if all the
>>>interesting channels are on the same multiplex.
> 
> 
> How can I send multiple channels of the same transponder ?

#!/bin/sh
/usr/local/bin/vlc dvb:// --dvb-adapter=1 --dvb-frequency=571500000 
--dvb-bandwidth=7 --programs=769,770 --ts-es-id-pid --ttl 12 
--sout='#duplicate{dst=std{access=udp,mux=ts,url=239.255.100.102:1234,sap,group="Usyd 
META",name="Usyd META - SBS 1 Sydney 
"},select="program=769",dst=std{access=udp,mux=ts,url=239.255.100.103:1234,sap,group="Usyd 
META",name="Usyd META - SBS 2 Sydney"},select="program=770"}'


  This works for me - seperating out the two channels on the same 
transponder and sending them on different multicast groups.
  This is actually a slightly edited command line straight out of one of 
the examples in the documentation for vlc.
  BTW I found what 'PID's to use (programs) using dvbscan and consulting 
the resulting 'channels.conf' file.


  I've experimented with using RTP to frame the streams, but I don't see 
any point really. I could get quicktime to connect when I did
--sout='#duplicate{dst=rtp{mux=ts,dst=239.255.100.104,port=1234,sap,group="Usyd 
META",name="Usyd META - ABC Sydney",sdp="sap://"},select="program=546"

  But it didn't show anything. The 'get info' show it recieving a 5Mb/s 
stream, but no output. MPEG2 is an optional extra in quicktime it seems.

  And the sap stuff didn't seem to get broadcast.

  vlc and it's play list are all good, but I am hoping to build web 
pages that allow people to connect to our streams. I've done this before 
with Quicktime, and the same page works on Win and Mac. The vlc mozilla 
plugin works - but no mac version and most of the 'clients' are using Macs.
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