[Live-devel] multicast port of client

[Ross Finlayson]

> >> I open two clients(using vlc) at the same host connecting to the same multicast source of live555 and I found that these two clients use the same port of rtp and rtcp
> >Yes, of course they do, because that's what multicast means: Each packet is sent - just once -> to a single (multicast) IP address and port number.  (I.e., the IP address and port number are part of the packet, and are therefore the same for each recipient.)
> >> I want these two clients at the same host use different port (like unicast),how can I to do?
> >You can't, without actually getting two separate unicast streams - one to each port.
>  
> If so,these two clients will send RR reports to the server
That's true only for SSM ("source-specific multicast") streams.  For ASM ("any-source multicast") streams, RTCP "RR" reports are sent to the whole multicast group - not back to the server.

> and these RR reports use the same 'reportSenderSSRC'.
No, because each participant in the multicast session - i.e., the sender, and each of the recipients - has a different SSRC.


Ross Finlayson
Live Networks, Inc.
http://www.live555.com/

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