[Live-devel] question RTSP server

[g.jaegy]

Fantastic, thanks a lot for that quick and very precise answer.

I've managed to update the code quickly, however, I'm just facing a little issue : I am not completely sure what the "reuseFirstSource" parameter in the OnDemandServerMediaSubsession() constructor means.

I set it to True as explained in the documentation.

I initially thought I could instantiate one single H265VideoStreamDiscreteFramer object (and one single "customized" class for its FramedSource input source), however I quickly got an execution violation as both the framer and the input source objects are destroyed  in OnDemandServerMediaSubsession::sdpLines() by the "Medium::close(dummyRTPSink);" line.

So, I guess I'll have to instanciate both the framer, and my custom input source to that, each time createNewStreamSource() gets called. 

Or do I have to only instanciate a new frame, but use the same single input source object ?

Thanks a lot !

-----Original Message-----
From: live-devel <live-devel-bounces at us.live555.com> On Behalf Of Ross Finlayson
Sent: Monday, January 9, 2023 12:27 PM
To: LIVE555 Streaming Media - development & use <live-devel at us.live555.com>
Subject: Re: [Live-devel] question RTSP server



> On Jan 9, 2023, at 2:57 AM, g.jaegy <g.jaegy at imagine3d.fr> wrote:
> 
> Hi,
>  I have a RTSP server that can stream a H265 stream from a custom H265 packet source, used by a “H265VideoStreamDiscreteFramer” object (basically a live screen capture of a Vulkan application sent down to NVenc which generated the H265 packets). It uses a “PassiveServerMediaSubsession” object and thus relies on multicast UDP packets.
>  This works great, however, I would like to add support for an optional TCP transport for RTP/RTCP (so user can configure the service to stream over TCP rather than multicast UDP).
>  I’ve managed to figure out I must replace the “PassiveServerMediaSubsession” subsession with an “OnDemandServerMediaSubsession” one. Is that correct ?

Yes.


>  “OnDemandServerMediaSubsession” being a base class, I’ve then tried to find a class that inherit from it, however, all I’ve found was the “H265VideoFileServerMediaSubsession”, which uses a file as input.
>  So, I’m not sure how to move forward. Should I write a custom class, that inherits from “OnDemandServerMediaSubsession” ?

Yes.  However, this requires reimplementing just two virtual functions in this subclass: “createNewStreamSource()” and “createNewRTPSink()”.  “createNewStreamSource()” should be simple: Just create an instance of your source object, and pass it to “H265VideoStreamDiscreteFramer::createNew()”.  And the code for “createNewRTPSink()” will probably be exactly the same as that in “H265VideoFileServerMediaSubsession.cpp”.

For more details, see: http://live555.com/liveMedia/faq.html#liveInput-unicast


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


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