[mythtvnz] DVB multicasting

[Ross and Jemima Knudsen]

Hi all,

I've been working on multicasting my FreeviewHD content on my LAN.  I've 
been using mumudvb which I've got up and running (last night).  It can 
multicast an entire transponder on the network for each card you have.  
I have two tuners so I managed to multicast the TVNZ and Canwest 
transponders together.  I was able to view all these channels using VLC 
on an Ubuntu and Windows 7 box over ethernet.  The wireless wasn't able 
to handle it (not sure why maybe the WPA overhead is too much).  Problem 
is now I want to get my mythbackend to 'tune' these channels.  I 
semi-followed JYAs howto here:

http://avenard.com/iptv/Setup.html

Using network recorder as the tuner card and using a m3u playlist to 
load the channels.  The whole backend setup seems to work without a 
hitch but when you try to watch live TV on the frontend it times out 
saying that I should have received a lock by now.  I'm not sure whether 
the problem is a OS configuration problem, a Myth problem or some other 
problem as the same m3u playlist file works with VLC on the same 
machine.  I wonder if it has something to do with subscribing to the 
multicast group.  This is my m3u file (the IP addresses are the default 
ones used by mumudvb):

#EXTM3U
#EXTINF:-1,TV ONE
udp://@239.100.0.0:1234
#EXTINF:-1,TV2
udp://@239.100.0.1:1234
#EXTINF:-1,TVNZ 6
udp://@239.100.0.2:1234
#EXTINF:-1,TVNZ 7
udp://@239.100.0.3:1234
#EXTINF:-1,TV3 PLUS 1
udp://@239.100.1.0:1234
#EXTINF:-1,TV3
udp://@239.100.1.1:1234
#EXTINF:-1,C4
udp://@239.100.1.2:1234

If I can get this to work then it means I can share my tuner hardware 
with the entire network.  It also means you could (if you wanted to) run 
mythbackend in a VM which would enable you to play around with various 
configurations...