[vdr] VDR and multicast streaming

Theunis Potgieter theunis.potgieter at gmail.com
Tue Oct 21 23:11:16 CEST 2008


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
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