rtpbin, multicast and ssrc change

[Mailing List SVR]

Hi,

I have some questions about sending rtp via multicast, I want simulate 
something like rtsp where only two ports are used, I started with the 
samples here:

http://cgit.freedesktop.org/gstreamer/gst-plugins-good/tree/tests/examples/rtp

so I use rtpbin ecc.. (complete dot file attached)

server unicast:

rtp => udpsink host=192.168.10.25 port=40000
rtcp sender => udpsink host=192.168.10.25 port=40001
rtcp receiver => udpsrc address=0.0.0.0 port=40001

server multicast:

rtp => udpsink host=224.4.0.0 port=40000
rtcp sender => udpsink host=224.4.0.0 port=40001
rtcp receiver => udpsrc address=224.4.0.0 port=40001

in unicast mode all is fine,

in multicast the client start receiving data but after about two seconds 
it eos. I connected the notify::caps on "send_rtp_src_0" on the server 
pipeline and when the client disconnect I see a new caps notify, the 
ssrc is changed!

If I change rtcp sender or receiver port the client works fine, however 
this way I think rtcp is lost.

What's wrong here?

thanks
Nicola
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