Hi,
        We used two NVRs (set to TCP with RTSP option Keep a live) and we found 
that the connection dropped every 1 minute. After tracing the packets, we found 
that the keep-alive option command of the first connection did not get a 
response from the RTSP server, so the RTSP server closed it after timeout.
And I found that handleAlternativeRequestByte did not receive any data, I also 
checked AWAITING_DOLLAR in tcpReadHandler1, the 
fServerRequestAlternativeByteHandler of the first line was modified to NULL, so 
the first line did not receive Keep a live.

        Is there any reason to do this? Can it be fixed?

Thanks,
Mono

-----Original Message-----
From: live-devel <live-devel-boun...@us.live555.com> On Behalf Of Ross Finlayson
Sent: Wednesday, March 2, 2022 5:04 PM
To: LIVE555 Streaming Media - development & use <live-de...@us.live555.com>
Subject: 【External】Re: [Live-devel] multiple TCP connections RTSP option keep a 
live not work



> On Mar 2, 2022, at 9:59 PM, Mono Lu (盧俊佑) <mono...@primax.com.tw> wrote:
>
> Hi,
>         We need to implement RTSP server and use it with NVR, but we found 
> that when we connect two TCP connections, the first connection cannot receive 
> any commands, such as OPTION and Teardown.
>         Is this a known issue? Is there any solution?

How specifically are you using our software?  (If you are not using our 
software, then we cannot help you.)

I suggest that you begin by using our demo applications: The “LIVE555 Media 
Server”, and “testOnDemandRTSPServer”.  Do you see the same problem when using 
these server applications (unmodified)?


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


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