[Live-devel] client port number at proxy server

[Frank van Eijkelenburg]

On 30-05-15 07:34, Ross Finlayson wrote:
>> In my situation, I have multiple cameras with a unique ip address and 
>> port number, but the remaining url could be the same as another 
>> camera. When using the proxy server I can register both back-end urls 
>> but not at different ports (because only one port is used when 
>> creating the RTSPServerWithREGISTERProxying object).
>
> I’m not sure I understand what you’re referring to here, but I suspect 
> that you may be confused about which port numbers are used where.  The 
> proxy server’s port number is the port number that 'front-end clients 
> use when communicating with the proxy server.  However, the port 
> number that’s used by the ‘back-end’ stream is the one that’s 
> mentioned (either implicitly or explicitly) in the “rtsp://“ 
> <rtsp://%93> URL that you register with the proxy server.  (By 
> default, this port number - if it’s not included explicitly in the 
> “rtsp://“ <rtsp://%93> URL - is 554, but if can be any other port 
> number.)  Or alternatively, if you use the ‘REGISTER’ mechanism asking 
> to reuse the TCP connection, then the ‘back-end’ stream’s port number 
> will be whatever ephemeral port number was used to receive the 
> ‘REGISTER’ command .  In either case, this port number (which can be 
> different for different ‘back-end’ streams) is completely independent 
> of whatever port number is used by the proxy server.
>
> Ross Finlayson
> Live Networks, Inc.
> http://www.live555.com/
>
>
>
> _______________________________________________
> live-devel mailing list
> live-devel at lists.live555.com
> http://lists.live555.com/mailman/listinfo/live-devel
Hi Ross,

Thank you for your answer. Maybe I can explain it a bit more with an 
example.

Old situation: Clients directly connect to different back-end streams 
(i.e. cameras). Suppose we have two cameras with the following url:
Camera 1: rtsp://192.168.1.1:1234/camera_stream_1
Camera 2: rtsp://192.168.1.2:4567/camera_stream_2

New situation: Clients connect through a proxy server with the back-end 
streams. Suppose the proxy server is started and both urls are 
registered. When instantiating the proxy server the proxy port is 
specified at 7621:
     RTSPServerWithREGISTERProxying::createNew(*env, 7621, NULL, NULL, 
65, False, verbosityLevel)

For the back-end streams the clients have to play either the url 
rtsp://172.16.1.1:7621/camera_stream_1 or 
rtsp://172.16.1.1:7621/camera_stream_2. There is only a difference in 
the url suffix, not in the used port (both are 7621).

The problem is, I have cameras in my network which have the same url 
suffix (camera_stream_equal). How can I distinguish (from a clients 
point of view) between these cameras? I guess the only way to make a 
difference is to give both cameras a unique url suffix when registering?


-- 

Met vriendelijke groeten / With kind regards,

*Frank van Eijkelenburg* Lead Designer

*T* +31(0)182594000 | *E* frank.van.eijkelenburg at technolution.nl
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