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<p class=MsoNormal> Hi
Ross,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I read severals times in the live555 mailing list and on
your site that you seems to consider MJPEG streaming as something to avoid.<o:p></o:p></p>
<p class=MsoNormal>But in some situation (dedicated network, when it is needed
to garanty precise positionning) it could be interesting.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Reading the RFC 2435 and the code of live555, it seems that
what is missing is very things, so I tried to improve my understanding of
live555 library.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I attached an class inherited from JPEGVideoSource interface
that get RTP informations from the JPEG header as you suggest <a
href="http://lists.live555.com/pipermail/live-devel/2003-November/000037.html">http://lists.live555.com/pipermail/live-devel/2003-November/000037.html</a><o:p></o:p></p>
<p class=MsoNormal>and a test program.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I did not really understood debate about qFactor that seems
not extratable from the quantification table data.<o:p></o:p></p>
<p class=MsoNormal>Using different precision for quantification table
(0,8,255), and different qFactor (128,255) doesnot seems to have big impact on the
displayed picture.<o:p></o:p></p>
<p class=MsoNormal>Using qFactor below 128, produce a image with very few
contrast.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>But perhaps the viewer is translating values before display ?<o:p></o:p></p>
<p class=MsoNormal>Do you have your own favourite figure for the qFactor ? or
do I miss things in the RFC ?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks for your advices.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Best Regards,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> Michel.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>[@@THALES GROUP RESTRICTED@@]<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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