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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>>
Is there any reference or commonly cited material about how these values
are calculated?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>“The
RTP timestamp represents the sampling instant of the first octet of data in the
frame. It starts from a random initial value and increments at a
media-dependent rate.”<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>From
“RTP, Audio and Video for the Internet”, Colin Perkins, 2003, ISBN:
0-672-32249-8<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
live-devel-bounces@ns.live555.com [mailto:live-devel-bounces@ns.live555.com] <b>On
Behalf Of </b>Chris Burns<br>
<b>Sent:</b> Thursday, August 07, 2008 3:32 AM<br>
<b>To:</b> live-devel@ns.live555.com<br>
<b>Subject:</b> [Live-devel] Calculating rtptime for RTSP/PLAY-Response
"RTP-Info" header<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>Hi
all,</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>I'm
trying to figure out how to calculate the RTPTime values in the
RTSP/PLAY-Response "RTP-Info" header, based on an incoming live
RTP/RTCP stream(s) from a live encoder.</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>I've
pulled apart an HUSM packet dump and the critical section looks something
like this:</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>769:
RTCP-SR/9301 from LENC</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
NTP: MSW: 3403825895 (0xcae242e7); LSW: 133143986 (0x07ef9db2)
==> Nov 12, 2007 03:11:35.0310 UTC</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
RTP: 670943030</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>803:
RTCP-SR/9303 from LENC</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
NTP: MSW: 3403825896 (0xcae242e8); LSW: 64424509 (0x03d70a3d) ==> Nov 12,
2007 03:11:36.0150 UTC<br>
RTP: 383790848</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>840:
RTCP-SR/9301 from LENC</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
NTP: MSW: 3403825897 (0xcae242e9); LSW: 64424509 (0x03d70a3d) ==> Nov 12,
2007 03:11:37.0150 UTC<br>
RTP: 671123120</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:red'>871: RTSP/PLAY-Request from CLIENT</span><span style='font-size:
10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>881:
RTCP-SR/9303 from LENC</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> NTP:
MSW: 3403825898 (0xcae242ea); LSW: 64424509 (0x03d70a3d) ==> Nov 12, 2007
03:11:38.0150 UTC</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
RTP: 383834926</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:red'>882: RTCP-SR/3457 to CLIENT</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
Same as 881<br>
<br>
906: RTCP-RR/3457 from CLIENT</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>919:
RTCP-SR/9301 from LENC</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
NTP: MSW: 3403825899 (0xcae242eb); LSW: 133143986 (0x07ef9db2) ==> Nov 12,
2007 03:11:39.0310 UTC</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
RTP: 671303570</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:red'>920: RTCP-SR/9301 to CLIENT</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
Same as 919</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>921:
RTP/9302 from LENC</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
Seq: 39932</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
RTP: 383841717</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:red'>922: RTP/3456 to CLIENT</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
Same as 921</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>923:
RTP/9300 from LENC</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
Seq: 59095</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
RTP: 671369087</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>924:
RTP/9302 from LENC</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
Seq: 39933</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
RTP: 383842741</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:red'>925: RTSP/PLAY-Response to CLIENT</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
RTP-Info:
url=rtsp://172.28.15.239/rtpencoder/Blah.sdp/streamid=1;seq=39932;rtptime=383841717,</span><span
style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
url=rtsp://172.28.15.239/rtpencoder/Blah.sdp/streamid=0;seq=59095;rtptime=671239890</span><span
style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:red'>926: RTP/3458 to CLIENT</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
Seq: 59095</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
RTP: 671369087</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>927:
RTP/3456 to CLIENT<br>
Seq: 39933</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
RTP: 383842741</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>How
in the world did HUSM come up with "rtptime=671239890"?????</span><span
style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>Is
there any reference or commonly cited material about how these values are
calculated?</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>Thanks
in advance,</span><span style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>ChrisB</span><span
style='font-size:10.0pt'><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
style='font-size:7.5pt;font-family:"Verdana","sans-serif"'>Chris Burns<br>
</span></b><span style='font-size:7.5pt;font-family:"Verdana","sans-serif"'>M:
+64 21 391 286<br>
<a href="mailto:chris.burns@abdeus.com">chris.burns@abdeus.com</a></span><o:p></o:p></p>
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