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</o:shapelayout></xml><![endif]--></head><body lang=RU link=blue vlink=purple><div class=WordSection1><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>I have tried to rewrite H264VideoStreamFarmer with H264VideoStreamParcer to SVCVideoStreamFarmer with SVCVideoStreamParcer correspondingly. Especially I put attention to the </span><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'>parse() function. The problem I met now is that the parse() function stucks, when some of the input packets should be ignored.<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'>I use “svcext” library to analyze the H264 packets. Since there are till 9 AVC flows in one SVC, I have to skip some redundant packets, but when I try to skip them in the parse function it just stucks. Could you, please, help me with explaining how should I process the data in that case.<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'>I attach the class files to this letter. Maybe you also find them useful to include in your library in the future to add the support of SVC streams.<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'>Thanks in advance.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US 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>Joao Almeida<br><b>Sent:</b> Wednesday, July 06, 2011 9:36 AM<br><b>To:</b> live-devel@ns.live555.com<br><b>Subject:</b> Re: [Live-devel] SVC -> AVC<o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>I belive live555 don' t support yet h264/SVC :(<br> <br>look from openSVC with there modified MP4box for SVC, you can hint the SVC.264 in a standard MP4 cointainer wich "H264VideoStreamFarmer" can use.<br> <o:p></o:p></span></p><div><div class=MsoNormal align=center style='text-align:center'><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><hr size=2 width="100%" align=center id=stopSpelling></span></div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From: sergey.kosov@project-10.de<br>To: live-devel@ns.live555.com<br>Date: Wed, 6 Jul 2011 02:25:57 +0200<br>Subject: Re: [Live-devel] SVC -> AVC<o:p></o:p></span></p><div><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>>><i>I wonder how to extract an AVC flow from the SVC file, using live555 </i></span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>>><i>library. Should it be a filter?</i></span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'> </span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>> I'm not sure what a "SVC file" is, but it it's the same as a ".264" file</span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>> - i.e., a sequence of H.264 NAL units, each preceded by 0x00000001 - </span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>> then you may be able to use "H264VideoStreamFramer" (or perhaps a slight </span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>> modification of this).</span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>> </span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>> -- Ross FinlaysonLive Networks, Inc.</span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>> </span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'><a href="http://www.live555.com/" target="_blank"><span lang=EN-US style='font-family:"Courier New"'>http://www.live555.com/</span></a></span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=DE style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'> </span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'>Thats right. I mean that SVC stream is a container with up to 9 layers (3 temporal and 3 spacial), where each layer could be represented as an AVC stream. It is possible to extract the needed layer with i.e. “svcext library”. But I want to do that with the help of live555. </span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'>Processing SVC stream with </span><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:black'>"H264VideoStreamFramer" produces a .ts file with spacial layer equal to 0 and temporal layer also equal to 0. And my question was about extracting a user-defined layer to save it in a .ts file. I use as an example testH264VideoStreamer application from the original library package.</span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> </span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><br></span><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>_______________________________________________ live-devel mailing list </span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><a href="mailto:live-devel@lists.live555.com"><span lang=EN-US>live-devel@lists.live555.com</span></a></span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> </span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><a href="http://lists.live555.com/mailman/listinfo/live-devel"><span lang=EN-US>http://lists.live555.com/mailman/listinfo/live-devel</span></a></span><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p></div></div></div></body></html>