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--></style><title>Re: [Live-devel] QoS with openRTSP and Jitter
output</title></head><body>
<blockquote type="cite" cite><tt>>><i>in my "IPTV QoS
Monitoring" project i've tried to use openRTSP to get<br>
</i>>><i>QoS information for a particular stream. The output of
jitter as a QoS<br>
</i>><i>>parameter is also interesting for me, so I'v extended
the openRTSP code<br>
</i>><i>>to output this information. My question is, if I did it
the right way,<br>
</i>><i>>because the jitter value I get, seems to be strange to
me.<br>
</i><br>
>The value returned by "RTPReceptionStats::jitter()" is
the jitter<br>
>value defined in the RTP/RTCP specification (RFC 3550, section<br>
>6.4.1). It is expressed in timestamp units, *not* ms, so you
should<br>
>divide it by the RTP timestamp frequency, not
1000.</tt></blockquote>
<blockquote type="cite" cite>I am just wondering how to get the RTP
timestamp frequency from video streams</blockquote>
<div><br></div>
<div>"RTPSource:: timestampFrequency()"</div>
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<div><br>
Ross Finlayson<br>
Live Networks, Inc.<br>
http://www.live555.com/</div>
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