[Live-devel] QoS with openRTSP and Jitter output

Ross Finlayson finlayson at live555.com
Thu May 24 11:03:22 PDT 2007


>in my "IPTV QoS Monitoring" project i've tried to use openRTSP to get
>QoS information for a particular stream. The output of jitter as a QoS
>parameter is also interesting for me, so I'v extended the openRTSP code
>to output this information. My question is, if I did it the right way,
>because the jitter value I get, seems to be strange to me.

The value returned by "RTPReceptionStats::jitter()" is the jitter 
value defined in the RTP/RTCP specification (RFC 3550, section 
6.4.1).  It is expressed in timestamp units, *not* ms, so you should 
divide it by the RTP timestamp frequency, not 1000.
-- 

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


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