[Live-devel] Help with multicast

[Marta Gros Marín]

Hi to everyone,

I have some questions about multicast that hope someone can help me with.

I need to transmit a mpeg4 video using multicast and for doing that I'm 
using the "-m" option in wis-streamer.
Doing that and using Wireshark I can see the multicast packets but if I try 
to watch the video connecting to the multicast address using VLC I see 
nothing, but, if I use the RTSP option in VLC then I can see the video.

With RTSP the SDP info is as following:
 v=0

o=- 952047184189632 1 IN IP4 192.168.1.95

s=RTSP/RTP stream 
i=mpeg4

t=0 0

a=tool:LIVE555 Streaming Media v2008.04.02

a=type:broadcast

a=control:*

a=source-filter: incl IN IP4 * 192.168.1.95

a=rtcp-unicast: reflection

a=range:npt=0-

a=x-qt-text-nam:RTSP/RTP stream from DaVinci EVM

a=x-qt-text-inf:mpeg4

m=audio 6002 RTP/AVP 96

c=IN IP4 232.36.244.217/255

a=rtpmap:96 L16/8000

a=control:track1

m=video 6000 RTP/AVP 97

c=IN IP4 232.36.244.217/255

a=rtpmap:97 MP4V-ES/90000

a=fmtp:97 
profile-level-id=1;config=000001B001000001B509000001010000012000844007A94022
D0A21F

a=control:track2
And the SETUP says:
Transport: 
RTP/AVP;multicast;destination=232.36.244.217;source=192.168.1.95;port=6002-6
003;ttl=255
Does it mean I am really transmiting in multicast? shouldn't I be able to 
connect directly to the multicast address?

Another thing is that I read that doing: ping 224.0.0.2 the multicast 
router should answer, but I get no answer. Does it mean my router is not 
multicast?

As you can see I'm pretty lost with multicast, so I would be grateful if 
something could help me.

Thanks in advance.

Best regards to everyone,

Marta

   
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