[Live-devel] JPEG multicast relay

[Cifrzak Gmail]

   Hi all,

I have a situation where I have a relay host connected to two networks. 
On one there are cameras streaming JPEG frames via multicast (they use 
PassiveServerMediaSubsesson and JPEGVideoRTPSink with custom source 
class), on the other I have the clients which need to receive those 
streams.
I'm not allowed to setup routing between the two networks.
I was planning to run a relay between the two networks, which would 
receive the multicast streams and make them available on the client-side 
network, but with no success.
My camera streamers do work (tested with VLC on their network), I can 
also receive data to a file on the relay. I can't re-stream it on the 
relay.

The relay call flow is this:
request stream information from camera via RTSP (works)
retrieve FramedSource from the camera stream subsession (works)
create rtp and rtcp groupsocks for streaming (works)
create JPEGVideoRTPSink with above rtp groupsock (works)
create RTCPInstance with the sink (works)
create PassiveServerMediaSubsession using the sink and add it to relay RTSP
send play command (works)
sink->startPlaying() using the FramedSource

I can't receive the stream streamed by relay host. RTSP commands are 
being exchanged but no data comes out afterwards.

So the working vs non-working case is the relay can save to a file, but 
can't re-stream

As you can see I have only vague knowledge about live555/streaming. Any 
help on the JPEG multicast relay is much appreciated.

Many thanks