[streaming] Re: WMV & Multicast for Internet

[Marshall Eubanks]

More correctly, multicast is not provided on _much_ of the
public Internet. See

http://www.multicasttech.com/status/  for more details on this.

It is commonly used in Enterprise / campus networks. Whether it will
meet  his needs depends of course on  just what those needs are.

Regards
Marshall

On Nov 25, 2005, at 11:08 AM, ScHinZe wrote:

> Multicast is not providing on a internet public network...
> You have to use a private network, like satellite...
> On internet, you can only provide unicast streaming connections...
> Or peer to peer, with tools like SopCast ;)
>
> 2005/11/25, Marshall Eubanks <tme at multicasttech.com>: Hello;
>
> 1.) Multicast addresses are the _destination_ address, not the
> _source_ address for multicasts. I.e.,
> to send multicasts, in most systems it suffices to pick UDP and put
> in a multicast address
> as the destination address. (My reading of the original post was that
> he thought that
> the  multicast address was assigned in some  fashion to the  source,
> as a secondary
> source IP address, which it isn't.)
>
> 2.) Of the 224/4 multicast range that Viktor mentions below, most has
> been assigned by IANA for
> various purposes or are reserved. PLEASE do NOT pick a multicast
> address at random from
> the 224.0.0.0-239.255.255.255 range.
>
> 3.) The 239/8 range has been assigned for site  and network local
> addresses, which  need no coordination except
> with the local network administrator. In other words, the range
> 239.0.0.0 to 239.255.255.255 is analogous for multicast to the 10 / 8
> (i.e., 10.0.0.0 to 10.255.255.255) range used for RFC1918 NAT's -
> just pick one.
>
> 4.) If you want to have a globally routable multicast address, the
> best bet is to use  "GLOP" space
> in 233/8. This is covered in the multicast faq file
>
> http://www.multicasttech.com/faq/
>
> Regards
> Marshall Eubanks
>
> On Nov 25, 2005, at 3:54 AM, Viktor Kompaneyets wrote:
>
> > Steit Slings wrote:
> >
> >> Hai Rafa,
> >>
> >> You do not need a multicast IP for wmv. The problem is in your  
> config
> >> 1) acodec should be mp3 for windows media
> >> 2) url ahould be the IP number of the network card, now your
> >> listening on
> >> the localhost. You sould do url=:1234 to listen on ALL IP's for  
> your
> >> computer,
> >> Furthermore with this statement your are not sending out, the
> >> client needs
> >> to collect the stream from your server using mms://your.ip.number :
> >> 1234/
> >
> > Partially wrong. For multicast You need to select as mcast-addr
> > adress in
> > range 224.0.0.0-239.255.255.255. Adresses in 224.0.0.0-225.0.0.0
> > can be
> > assigned only if You have network without routers. Reserved
> > addresses are
> > described in RFC, or you can read this article:
> > http://www.linuxfocus.org/English/January2001/article144.shtml
> >
> > So if you stream to mcast you should set as output URL something
> > like this:
> > {acodec=mp3, vcodec=WMV2,mux=asf,url=225.0.0.1:1234}
> >
> > So on the player you should open stream as: mms://225.0.0.1:1234
> > Check, if on both sides is mcast-routing is set for network
> > 224.0.0.0/4 on
> > the interface, which is envolved in multicast.
> >
> >
> > --
> > Viktor Kompaneyets
> > Wnet project manager
> >
> > --
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> >
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