<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"><base href="x-msg://6301/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><blockquote type="cite"><div lang="EN-US" link="blue" vlink="purple" style="font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div class="WordSection1" style="page: WordSection1; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; ">I am trying to record the audio from a Polycom Telepresence m100 SIP software client.<o:p></o:p></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><o:p> </o:p></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; 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></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; 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" style="color: purple; text-decoration: underline; ">sip:10.0.71.24@10.0.71.24</a><o:p></o:p></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><o:p> </o:p></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; 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></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><o:p> </o:p></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; ">playSIP creates only a zero length file named: audio-PCMU-1<o:p></o:p></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><o:p> </o:p></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; ">Any advice?</div></div></div></blockquote><div><br></div>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</div><div><span class="Apple-tab-span" style="white-space:pre"> </span><span style="font-family: Calibri, sans-serif; font-size: 11pt; ">m=audio 8000 RTP/AVP 118 115 114 113 99 98 97 102 101 103 9 15 0 8 119</span><blockquote type="cite"><div lang="EN-US" link="blue" vlink="purple"><div class="WordSection1" style="page: WordSection1; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><o:p></o:p></div></div></div></blockquote>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.</div><div><span class="Apple-tab-span" style="white-space: pre; "> </span><span style="font-family: Calibri, sans-serif; font-size: 11pt; ">m=audio 8000 RTP/AVP 0 118 115 114 113 99 98 97 102 101 103 9 15 8 119</span></div><div><div><font face="Calibri, sans-serif"><span style="font-size: 15px;">because "0" </span></font>(i.e., PCMU) RTP payload format happens to be the only RTP payload format that's used in this stream.</div></div><br><div apple-content-edited="true">
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; ">Ross Finlayson<br>Live Networks, Inc.<br><a href="http://www.live555.com/">http://www.live555.com/</a></span></span>
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