[Live-devel] OpenRTSP stream delay increasing with time

Ross Finlayson finlayson at live555.com
Thu Sep 18 05:45:08 PDT 2014


> here is my command line
> 
> ./OpenRTSP -v -Q -D 1 -n rtsp://<IP>:554/11 | ffplay -loglevel verbose -fflags nobuffer -i pipe:0
> 
> Now this delay slowly keeps increasing from 1.5 sec upto 4~5 seconds in about 20 minutes. And I assume it will continue to increase with time.
> 
> So my questions are :-
> 1 - what is causing the initial delay ?

I don't know, but it's not "openRTSP".  (Our RTSP/RTP client software does not include any buffering, or significant delay.)  The delay is probably some combination of the OS pipe (i.e., the "!") and "ffplay" itself (i.e., the decoding/rendering overhead).


> Is there a way to disable "pre caching" of frames in OpenRTSP ?

There's no such thing.

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

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