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</o:shapelayout></xml><![endif]--></head><body lang=EN-IN link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thanks, the fix does work, I am able to stream my live source. But the video quality I am getting on other side is quite glitch. Basically I am streaming encoded data from ffmpeg’s output packet (AVPacket) but I am suspecting that since FFmpeg Gives more than one nal unit in a single AVPacket there might be data loss in live media while streaming because of which playing in client side producing wrong images. I have increased the outPacketBuffer::maxSize to 160000 but it doesn’t seem to fix the problem. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Does live media do the parsing of Nal unit which are inside FFmpeg’s AVPacket or I have to copy single nal unit at a time in my device source?<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'>Thanks<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Bhawesh Kumar<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>VizExperts India Pvt. Ltd.<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 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US 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>Ross Finlayson<br><b>Sent:</b> 09 January 2014 01:59<br><b>To:</b> LIVE555 Streaming Media - development & use<br><b>Subject:</b> Re: [Live-devel] Subclassing OnDemandServerMediaSubsession for Live Video Sources to stream h264<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>I am using Live555 library to create rtsp stream for live device source. I read the FAQ and mailing list and sub classed all the required classes ::<o:p></o:p></span></p></div><div style='margin-left:36.0pt'><p class=MsoNormal style='text-indent:-18.0pt'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>1.</span><span style='font-size:7.0pt'> <span class=apple-converted-space> </span></span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Framed source (using the deviceSource.cpp model)<o:p></o:p></span></p></div><div style='margin-left:36.0pt'><p class=MsoNormal style='text-indent:-18.0pt'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>2.</span><span style='font-size:7.0pt'> <span class=apple-converted-space> </span></span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>OnDemandServerMediaSubsession (using H264VideoFileServerMediaSubsession model)<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>But few on the questions are I am not able to figure out:<o:p></o:p></span></p></div><div style='margin-left:36.0pt'><p class=MsoNormal style='text-indent:-18.0pt'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>1.</span><span style='font-size:7.0pt'> <span class=apple-converted-space> </span></span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>In each call of my doGetNextFrame() of my device source I am assuming that no frame data is available and I am returning. Instead whenever I receive data I trigger a event which schedule getNextFrame() of my device source. Is there is status check (waiting for event or running) required for Live555 run loop to schedule the task of the new data arrival in the function signalNewFrameData() of device source?<o:p></o:p></span></p></div></div></blockquote><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>The LIVE555 event loop (which you entered when you ran "doEventLoop()") automatically figures out when "TaskScheduler::triggerEvent()" has been called (from another thread), and calls the appropriate handler function (which you registered when you called "createEventTrigger()"; i.e., the "deliverFrame0()" function in the "DeviceSource" example code).<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><br><br><o:p></o:p></p><div><div style='margin-left:36.0pt'><p class=MsoNormal style='text-indent:-18.0pt'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>2.</span><span style='font-size:7.0pt'> <span class=apple-converted-space> </span></span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>In my OnDemandServerMediaSubsession subclass I have implemented both required function createNewStreamSource() and createNewRTPSink(). Since I set the reuseFirstSource to true in my OnDemandServerMediaSunsession I keep a reference of my device source in my dataMember variable.<o:p></o:p></span></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>That's your problem. Setting "reuseFirstSource" to True simply means that only one instance of the source class will be created *at a time*, regardless of the number of concurrent RTSP clients that have requested the stream. It does *not* mean that only one instance of the source class will be created *ever*. In fact, as you noticed, the "OnDemandServerMediaSubsession" code creates an initial instance of the source class (it uses this to generate the SDP description in response to the first RTSP "DESCRIBE"). It then closes this object. Later, when the first RTSP client does a RTSP "SETUP", another instance of the source class will be created. (That instance will not get closed again until the last concurrent client does a "TEARDOWN".)<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>So, your code should allow for the possibility of more than one instance of your data source class being instantiated (and later closed) - but sequentially, not concurrently. DO NOT modify the supplied "OnDemandServerMediaSubsession" source code.<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><span class=apple-style-span><span style='font-family:"Helvetica","sans-serif";color:black'>Ross Finlayson</span></span><span style='font-family:"Helvetica","sans-serif";color:black'><br><span class=apple-style-span>Live Networks, Inc.</span><br><span class=apple-style-span><a href="http://www.live555.com/">http://www.live555.com/</a></span></span> <o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div></body></html>