[vdr] VDR and multicast streaming

Artem Makhutov artem at makhutov.org
Wed Oct 22 08:24:02 CEST 2008


Hi,

On Tue, Oct 21, 2008 at 11:11:16PM +0200, Theunis Potgieter wrote:
> 2008/10/21 Artem Makhutov <artem at makhutov.org>
> 
> > Hi,
> >
> > On Tue, Oct 21, 2008 at 04:44:20PM +0200, Frank Schmirler wrote:
> > > On Tue, 21 Oct 2008 14:46:52 +0200, Artem Makhutov wrote
> > > > The ADB-Boxes use Multicast-TS. I have captured a transmission from
> > > > my IPTV provider. So you can take a look on it:
> > > >
> > > > http://www.makhutov.org/downloads/adb/
> > >
> > > The .pcap file is not accessible. Would it contain the IGMP traffic, too?
> >
> > Ah, sorry, I fixed the permissions.
> > Yes, you can the the IGMP traffic there.
> >
> > Packet #4 is the IGMG Join Group packet. After this one the stream
> > starts. Packet 1,2 and 3 not relevant, they are used for other multicast
> > stuff.
> >
> > Packet #23114 is the IGMP Leave, after this packet the ISP stops the
> > multicast transmission.
> 
> 
> So we can safely assume that this is at least IGMPv2 packets. Since IGMPv1
> doesn't have a "Leave Group message".
> 
> source : http://www.linux.org/docs/ldp/howto/Multicast-HOWTO-7.html

Yes, exactly, it is IGMPv2.

Regards, Artem



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