[Live-devel] Using live555 to advertise multicast UDP

[Ross Finlayson]

> On Apr 24, 2024, at 2:24 AM, Jonathan Brady via live-devel <live-devel at us.live555.com> wrote:
> 
> I have an application which already outputs (none RTP) video via multicast, I would like to use a Live555 server to simply "advertise" these streams via an RTSP connection in it's SDP without actually serving the data.  How can I go about doing this?

Jonathan,

What do you mean by “non-RTP video” (I assume that’s what you meant)?  What kind of video is this, and how is it packaged and sent (presumably over raw UDP)?

The problem here is that’s no IETF-standard way for a SDP description to describe a video (or audio) stream that’s not being sent over RTP.  And our RTSP server (actually “PassiveServerMediaSubsession”) code is not set up to deal with multicast streams that don’t use RTP.

If your stream were RTP, then it would be easy (using the LIVE555 libraries) to set up a RTSP server that just ‘advertised’ a multicast stream, without actually sending it.  Why aren’t you using RTP?


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