[Live-devel] Is there a better command to use other than OPTION for keep-alive?

[Ross Finlayson]

> I see that the OPTION command is used for keeping a stream alive.  I 
> there a better command that can be used that can also indicate the 
> stream is still running?

Not really.  Every server should support "OPTIONS".

("GET_PARAMETER" could also be used, but some servers don't support this.)


> // Choose a random time from [delayMax/2,delayMax) seconds:
> 
> If delayMax is choosen, and a camera reports timeout=XX, should XX ever 
> be used?

It *is* used - to compute "delayMax".  (Note the call to "sessionTimeoutParameter()", which returns this value.)


> I think a delayMax should never be used, but something less than the max?

The code does this - that's why the comment in the code says "[delayMax/2,delayMax)", rather than "[delayMax/2,delayMax]".

In any case, a standards-compliant server (e.g., network camera) should also be using RTCP "RR" packets - sent by the proxy server - to indicate liveness. It should not be relying just upon the periodic "OPTIONS" commands.

-----------------------
A reminder to everyone, once again: If anyone is having a problem with one particular third-party server or client, then I need to hear *directly* from the manufacturer of that third-party server or client.  (Via the "live-devel" mailing list is OK.)  I will not spend any time debugging (or attempting to 'work around') a buggy third-party server or client solely via an intermediary.


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

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