Hi, On Tue, Oct 21, 2008 at 11:48:45AM +0200, Frank Schmirler wrote: > On Tue, 21 Oct 2008 09:13:15 +0200, Theunis Potgieter wrote > > What is exactly involved in changing it from streaming to multi- > > casting, isn't it just changing the IP destination? Or does it > > require repacking it from mpeg2-ts to something else? Sorry if this > > is a stupid question. > > We are not limited to TS here - any of the formats streamdev can remux to > should do.
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/ > I'd say the following things are required: > - Use UDP instead of TCP for streaming (is it just switching from SOCK_STREAM > to SOCK_DGRAM or do we need to do something more, e.g. fixed/max. packet > sizes?) > - Provide some way to select the channel for multicast transmission and stop > it when it's no longer needed (probably via streamdev http server menu. Or do > these kinds of settop boxes support some sort of control protocol to > enable/disable the stream?) 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. 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. The best would be implementing the stream stop/start by using IGMP as this is part of the IP-Multicast standard, so in theory all multicast clients should support it. Regards, Artem _______________________________________________ vdr mailing list firstname.lastname@example.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr