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</o:shapelayout></xml><![endif]--></head><body lang=KO link=blue vlink=purple><div class=WordSection1><p class=MsoNormal align=left style='text-align:left;background:white;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all'><span lang=EN-US style='font-size:10.5pt;font-family:"Arial","sans-serif";color:#222222'>Hi, I have some questions.<o:p></o:p></span></p><p class=MsoNormal align=left style='text-align:left;background:white;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all'><span lang=EN-US style='font-size:10.5pt;font-family:"Arial","sans-serif";color:#222222'>In my setup, my RTSP client for VOD uses another RTSP library(CURL), and RTSP server is live555.<o:p></o:p></span></p><p class=MsoNormal align=left style='text-align:left;background:white;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all'><span lang=EN-US style='font-size:10.5pt;font-family:"Arial","sans-serif";color:#222222'>(Due to the some reasons, I cannot use openRTSP for the client)<o:p></o:p></span></p><p class=MsoNormal align=left style='text-align:left;background:white;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all'><span lang=EN-US style='font-size:10.5pt;font-family:"Arial","sans-serif";color:#222222'>Because CURL only handles RTSP commands, I need to implement RTP receiver part myself.<o:p></o:p></span></p><p class=MsoNormal align=left style='text-align:left;background:white;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all'><span lang=EN-US style='font-size:10.5pt;font-family:"Arial","sans-serif";color:#222222'><o:p> </o:p></span></p><p class=MsoNormal align=left style='text-align:left;background:white;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all'><span lang=EN-US style='font-size:10.5pt;font-family:"Arial","sans-serif";color:#222222'>Question 1) <o:p></o:p></span></p><p class=MsoNormal align=left style='text-align:left;background:white;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all'><span lang=EN-US style='font-size:10.5pt;font-family:"Arial","sans-serif";color:#222222'>I have read live555 FAQ that says, to synchronize separate streams like audio and video, RTCP is needed. If so, should I also implement RTCP handling in my client?<o:p></o:p></span></p><p class=MsoNormal align=left style='text-align:left;background:white;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all'><span lang=EN-US style='font-size:10.5pt;font-family:"Arial","sans-serif";color:#222222'><o:p> </o:p></span></p><p class=MsoNormal align=left style='text-align:left;background:white;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all'><span lang=EN-US style='font-size:10.5pt;font-family:"Arial","sans-serif";color:#222222'>Question 2) <o:p></o:p></span></p><p class=MsoNormal align=left style='text-align:left;background:white;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all'><span lang=EN-US style='font-size:10.5pt;font-family:"Arial","sans-serif";color:#222222'>When I stream TS file with audio and video from VLC, its SDP shows audio and video media description separately.<o:p></o:p></span></p><p class=MsoNormal align=left style='text-align:left;background:white;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all'><span lang=EN-US style='font-size:10.5pt;font-family:"Arial","sans-serif";color:#222222'>But when I stream the same file from live555 media server, SDP only shows video media,<o:p></o:p></span></p><p class=MsoNormal align=left style='text-align:left;background:white;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all'><span lang=EN-US style='font-size:10.5pt;font-family:"Arial","sans-serif";color:#222222'>in this case I can hear audio, and when I save output with -v option(video only) in openRTSP, <o:p></o:p></span></p><p class=MsoNormal align=left style='text-align:left;background:white;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all'><span lang=EN-US style='font-size:10.5pt;font-family:"Arial","sans-serif";color:#222222'>output file also has the audio track.<o:p></o:p></span></p><p class=MsoNormal align=left style='text-align:left;background:white;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all'><span lang=EN-US style='font-size:10.5pt;font-family:"Arial","sans-serif";color:#222222'>Why does this happen? <o:p></o:p></span></p><p class=MsoNormal align=left style='text-align:left;background:white;text-autospace:ideograph-numeric ideograph-other;word-break:keep-all'><span lang=EN-US style='font-size:10.5pt;font-family:"Arial","sans-serif";color:#222222'>In this case is RTCP also needed?<o:p></o:p></span></p></div></body></html>