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</o:shapelayout></xml><![endif]--></head><body lang=FR link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'> Hi Ross,<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>Thanks again for your support.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>We didn’t understood deeply what brings the RTCP sender report flooding, but we has such a behavior using multicast stream that share the same multicast port.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>Wireshark analysis show that an RTCP sender report is forwarded between 2 RTSP servers without ends.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>We tried to understand the comment in RTCP.cpp that decide to resend a packet when SSM flag is set and packet comes from another host.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>It could be again a consequence of the multicast problem in linux using ASM.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>However we notice that RTCPInstance constructor has an argument to say to use SSM, but the RTCPInstance have a reference to the GroupSock that know if it was created for SSM.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>Setting this flag according to how groupsock was created seems to solve the problem.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>For instance in testH264VideoStreamer.cpp seems to make a confusion.<o:p></o:p></span></p><pre><span lang=EN-US>00057 </span><a href="http://www.live555.com/liveMedia/doxygen/html/classGroupsock.html"><span lang=EN-US>Groupsock</span></a><span lang=EN-US> rtpGroupsock(*</span><a href="http://www.live555.com/liveMedia/doxygen/html/MPEG2TransportStreamIndexer_8cpp.html#dfa09dd3866fd8ba8ab69586f9437d19"><span lang=EN-US>env</span></a><span lang=EN-US>, destinationAddress, rtpPort, ttl);<o:p></o:p></span></pre><pre><a name=l00058></a><span lang=EN-US>00058 rtpGroupsock.</span><a href="http://www.live555.com/liveMedia/doxygen/html/classGroupsock.html#f1d8b7124167e2a5fc12ba3a0039346a"><span lang=EN-US>multicastSendOnly</span></a><span lang=EN-US>(); <span class=comment>// we're a SSM source</span><o:p></o:p></span></pre><pre><a name=l00059></a><span lang=EN-US>00059 </span><a href="http://www.live555.com/liveMedia/doxygen/html/classGroupsock.html"><span lang=EN-US>Groupsock</span></a><span lang=EN-US> rtcpGroupsock(*</span><a href="http://www.live555.com/liveMedia/doxygen/html/MPEG2TransportStreamIndexer_8cpp.html#dfa09dd3866fd8ba8ab69586f9437d19"><span lang=EN-US>env</span></a><span lang=EN-US>, destinationAddress, rtcpPort, ttl);<o:p></o:p></span></pre><pre><a name=l00060></a><span lang=EN-US>00060 rtcpGroupsock.</span><a href="http://www.live555.com/liveMedia/doxygen/html/classGroupsock.html#f1d8b7124167e2a5fc12ba3a0039346a"><span lang=EN-US>multicastSendOnly</span></a><span lang=EN-US>(); <span class=comment>// we're a SSM source</span><o:p></o:p></span></pre><pre><a name=l00061></a><span lang=EN-US>00061 <o:p></o:p></span></pre><pre><a name=l00062></a><span lang=EN-US>00062 <span class=comment>// Create a 'H264 Video RTP' sink from the RTP 'groupsock':</span><o:p></o:p></span></pre><pre><a name=l00063></a><span lang=EN-US>00063 </span><a href="http://www.live555.com/liveMedia/doxygen/html/classOutPacketBuffer.html#27f745b288df55bbfb39a7564fe40596"><span lang=EN-US>OutPacketBuffer::maxSize</span></a><span lang=EN-US> = 100000;<o:p></o:p></span></pre><pre><a name=l00064></a><span lang=EN-US>00064 </span><a href="http://www.live555.com/liveMedia/doxygen/html/testDVVideoStreamer_8cpp.html#d0d95ae4c5a49da3e034e3bb23adea20"><span lang=EN-US>videoSink</span></a><span lang=EN-US> = </span><a href="http://www.live555.com/liveMedia/doxygen/html/classH264VideoRTPSink.html#25c497ea6eccc5de3a22677acbcee140"><span lang=EN-US>H264VideoRTPSink::createNew</span></a><span lang=EN-US>(*</span><a href="http://www.live555.com/liveMedia/doxygen/html/MPEG2TransportStreamIndexer_8cpp.html#dfa09dd3866fd8ba8ab69586f9437d19"><span lang=EN-US>env</span></a><span lang=EN-US>, &rtpGroupsock, 96);<o:p></o:p></span></pre><pre><a name=l00065></a><span lang=EN-US>00065 <o:p></o:p></span></pre><pre><a name=l00066></a><span lang=EN-US>00066 <span class=comment>// Create (and start) a 'RTCP instance' for this RTP sink:</span><o:p></o:p></span></pre><pre><a name=l00067></a><span lang=EN-US>00067 <span class=keyword>const</span> <span class=keywordtype>unsigned</span> estimatedSessionBandwidth = 500; <span class=comment>// in kbps; for RTCP b/w share</span><o:p></o:p></span></pre><pre><a name=l00068></a><span lang=EN-US>00068 <span class=keyword>const</span> <span class=keywordtype>unsigned</span> maxCNAMElen = 100;<o:p></o:p></span></pre><pre><a name=l00069></a><span lang=EN-US>00069 <span class=keywordtype>unsigned</span> <span class=keywordtype>char</span> CNAME[maxCNAMElen+1];<o:p></o:p></span></pre><pre><a name=l00070></a><span lang=EN-US>00070 gethostname((<span class=keywordtype>char</span>*)CNAME, maxCNAMElen);<o:p></o:p></span></pre><pre><a name=l00071></a><span lang=EN-US>00071 CNAME[maxCNAMElen] = <span class=charliteral>'\0'</span>; <span class=comment>// just in case</span><o:p></o:p></span></pre><pre><a name=l00072></a><span lang=EN-US>00072 </span><a href="http://www.live555.com/liveMedia/doxygen/html/classRTCPInstance.html"><span lang=EN-US>RTCPInstance</span></a><span lang=EN-US>* rtcp<o:p></o:p></span></pre><pre><a name=l00073></a><span lang=EN-US>00073 = </span><a href="http://www.live555.com/liveMedia/doxygen/html/classRTCPInstance.html#baf83bbbca227116e81dac5a9bf0ce3c"><span lang=EN-US>RTCPInstance::createNew</span></a><span lang=EN-US>(*</span><a href="http://www.live555.com/liveMedia/doxygen/html/MPEG2TransportStreamIndexer_8cpp.html#dfa09dd3866fd8ba8ab69586f9437d19"><span lang=EN-US>env</span></a><span lang=EN-US>, &rtcpGroupsock,<o:p></o:p></span></pre><pre><a name=l00074></a><span lang=EN-US>00074 estimatedSessionBandwidth, CNAME,<o:p></o:p></span></pre><pre><a name=l00075></a><span lang=EN-US>00075 </span><a href="http://www.live555.com/liveMedia/doxygen/html/testDVVideoStreamer_8cpp.html#d0d95ae4c5a49da3e034e3bb23adea20"><span lang=EN-US>videoSink</span></a><span lang=EN-US>, </span><a href="http://www.live555.com/liveMedia/doxygen/html/UsageEnvironment_8hh.html#070d2ce7b6bb7e5c05602aa8c308d0c4"><span lang=EN-US>NULL</span></a> <span class=comment><span lang=EN-US>/* we're a server */</span></span><span lang=EN-US>,<o:p></o:p></span></pre><pre><a name=l00076></a><span lang=EN-US>00076 </span><a href="http://www.live555.com/liveMedia/doxygen/html/Boolean_8hh.html#4ef9178d6bd8f7ce58133fa8c3805842"><span lang=EN-US>True</span></a> <span class=comment><span lang=EN-US>/* we're a SSM source */</span></span><span lang=EN-US>);<o:p></o:p></span></pre><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>The RTCPIntance is create with SSM flag set but it use the ASM GroupSock, isn’t it ?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>Don’t you think it could be more robust to remove the SSM argument in RTCPInstance constructor and get it from RTCPgs->isSSM() ? <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>Thanks & Regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'> Michel.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><div><div><p class=MsoNormal><span style='mso-fareast-language:FR'>[@@ THALES GROUP INTERNAL @@]<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p></div></body></html>