[Live-devel] using stdin for live555MediaServer

[Simon Brown]

On 25/08/2020 10:51, Simon Brown wrote:
> On 25/08/2020 10:44, Ross Finlayson wrote:
>>> It would transpire that the onDemandRTSP server doesn't open stdin 
>>> or pull data from it until it gets an RTSP request from the outside 
>>> world.  But our encoder is pushing data out on stdout continuously.
>> Why is it doing that?  Is it doing non-blocking writes to ’stdout’?  
>> If so, then it probably shouldn’t.  If you do blocking writes to 
>> ’stdout’, and nothing is currently reading from the other side, then 
>> your encoder will just block until the other side needs data.
>
> It does non-blocking writes because otherwise everything else stalls.  
> We're only sending one of the streams to live555, the other streams 
> can't stop just because no-one is pulling the RTSP stream.
>
Is there any way for the onDemandRTSPServer to signal when it has a 
request for a stream?  If I set my stdout to non-blocking (it wasn't 
before which was causing my encoder to stall) then the main stream 
continues to run smoothly even if RTSP isn't being asked for, but the 
RTSP stream fails to lock onto the signal properly, so outputs very little.

Regards,

Simon

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