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. > > The boxes send IGMP Join / Leave Group messages, if you switch or > > turn on a channel. > > > > Streamdev could listen for such messages an enable/disable the streams. > > > > The IGMP Join Group messages are send in an interval (1 > > messege/minute). If an IGMP Leave Group message is recieved, or if > > no Join Message was received during 2 minutes then the stream sould > > be stopped. > > Makes sense - that's the way how it's supposed to work when subscribing to an > Internet multicast stream, i.e. accross router boundaries. With streamdev, > each channel would become a multicast group of its own. Multicast IPs are not > an issue here. The IPv4 Local Scope for multicast addresses is large enough. > But how do you configure them in the box? Or does it listen to some sort of > announcements (getstream2 sends SAP/SDP packets)? > > > The boxes also support HTML, so then can post data to a webpage, if the > > channel was switched. I am not sure if all boxes support this. At least > > the ADB boxes can do this. > > Some sort of user interface would be fine anyway. Yes, sure, this would be great. Regards, Artem _______________________________________________ vdr mailing list vdr@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
