[mythtv-users] Potential IPTV additions for Myth

Dave Bixler dbixler at wbs-wireless.com
Thu Jan 26 19:34:22 UTC 2006


An awesome idea if I must say so -- that is if I completely understand 
what you're proposing :).

Robert Johnston wrote:
> IPTV uses SAP+SDP for stream announcement and RTP+RTCP/RSTP (It seems
> that RTSP is used for VOD/PPV, and RTP is used for regular channels)
> for the actual video streams. All over multicast (Which is supported
> in all linux kernels from 2.2+).
>
> SAP/SDP description details: http://www.faqs.org/rfc/rfc2327.html
>
> SAP default announcement address: UDP:224.2.127.254:9875
>
> RTP defined in http://www.faqs.org/rfcs/rfc1889.html
>
> RSTP defined in http://www.faqs.org/rfcs/rfc2326.html
>
> VLC can be used as an example SAP/SDP provider, and to provide RTP or
> RTSP (In version 0.8.3+) streams (Use the wizard, or the "Open"
> dialog, and choose to "Stream" output, and VLC will announce the
> SAP/SDP and stream to a multicast port of your choosing). This means
> you don't actually *need* an IPTV provider, as you can be one yourself
> on your local network.
>
> I *think* that the existing code for DBox2 can be copied and re-purposed.
>
> The only thing that would be missing is the code to grab the "Program
> guide" (Which, I presume, is mentioned as a HTTP url in the SDP
> description, and is in a reasonably standard format, as it's made so
> differing set-top boxen can all auto-configure to pick up the correct
> lineup and information)
>
> I believe, with this integrated into Myth as another tuner(s) (And if
> we can find the Program Guide data, the equivalent of a EIT program
> guide provider) we can make Myth a formidable open-source IPTV STB,
> and as that is where TV is moving, it would be an early foot in the
> door.
>
> While I realise we have a feature freeze for 0.19, how would people
> (users and developers) feel about trying to get this into 0.20?
> --
> Robert "Anaerin" Johnston
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