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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">How can I fix this?<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">Markus.<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span 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> Thursday, May 02, 2013 2:49 PM<br>
<b>To:</b> LIVE555 Streaming Media - development & use<br>
<b>Subject:</b> Re: [Live-devel] playSIP - creates empty file<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">I am trying to record the audio from a Polycom Telepresence m100 SIP software client.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">On 10.0.71.24 I run a software VTC client configure to use SIP (Polycom Telepresence m100).<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">The URI is<span class="apple-converted-space"> </span><a href="sip:10.0.71.24@10.0.71.24"><span style="color:purple">sip:10.0.71.24@10.0.71.24</span></a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">On 10.0.71.109 I run the live555 command line tool playSIP calling 10.0.71.24.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">playSIP creates only a zero length file named: audio-PCMU-1<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Any advice?<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">The problem here is that our SDP parsing code currently only notes the first RTP payload format number in a SDP "m=" line (because our RTP processing code currently doesn't handle more than one RTP payload format code being used in a RTP
stream). Your server's SDP "m=" line is<o:p></o:p></p>
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<p class="MsoNormal"><span class="apple-tab-span"> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">m=audio 8000 RTP/AVP 118 115 114 113 99 98 97 102 101 103 9 15 0 8 119</span><o:p></o:p></p>
<p class="MsoNormal">which is legal, but our code would be able to handle it if the "0" (i.e., PCMU) payload format code were first - e.g.<o:p></o:p></p>
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<p class="MsoNormal"><span class="apple-tab-span"> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">m=audio 8000 RTP/AVP 0 118 115 114 113 99 98 97 102 101 103 9 15 8 119</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.5pt;font-family:"Calibri","sans-serif"">because "0" </span>(i.e., PCMU) RTP payload format happens to be the only RTP payload format that's used in this stream.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span class="apple-style-span"><span style="font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black">Ross Finlayson</span></span><span style="font-size:13.5pt;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>
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