[Live-devel] SDP Question

[Menne, Neil]

I just realized what the issue was. In this particular case, the SDP file is used to receive an old RTSP stream that is being looped via sending a pcap of the video. Seeing as there is no RTSP server to communicate with, that part isn't used but everything else regarding the session, subsession, and sink is fine (for anyone trying to follow along: see testRTSPClient). By changing that "0.0.0.0" to the IP address that the video was being streamed to, the sink was able to find and receive the video. I am grateful for your help and prompt responses, Ross.

Keep up the good work.
-Neil

From: live-devel-bounces at ns.live555.com [mailto:live-devel-bounces at ns.live555.com] On Behalf Of Ross Finlayson
Sent: Tuesday, January 17, 2012 6:21 PM
To: LIVE555 Streaming Media - development & use
Subject: Re: [Live-devel] SDP Question

I'm trying to add the functionality of opening a video stream given an SDP file like the one included. Given that there's no URL, it doesn't seem possible to parse it for the RTSP URL then initialize the RTSPClient; however, if you look at the SDP file, there isn't a URL to find.

Is there a way to figure this out using the MediaSession as it is created using a sdp description?

Well, you could do this if the SDP description was for a multicast stream, because then the SDP description would contain the IP multicast address in its "c=" line.

However, in your case the "c=" line contains only the 'null' address "0.0.0.0", which usually means that an additional control protocol (like RTSP or SIP) is necessary to set up the reception of the stream.

So the real question here is: Where is this video stream coming from?  And how did you get this SDP description?  If the stream's server supports RTSP, then you should be able to access directly using a RTSP client (which means that the SDP description gets processed internally, and you shouldn't need to concern yourself with it).  But if the stream's server *doesn't* support RTSP, then how did you get the SDP description?

Ross Finlayson
Live Networks, Inc.
http://www.live555.com/

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