<div dir="ltr">uuid_hold doesn't do what you think it does, everyone makes this mistake. uuid_hold sends a hold indication to the remote side putting it on hold in the same manner a phone does.<div><br></div><div>/b</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Nov 4, 2016 at 5:25 AM, Miroslav Levanic <span dir="ltr"><<a href="mailto:Miroslav.Levanic@enghouse.com" target="_blank">Miroslav.Levanic@enghouse.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Hi Brian,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Let’s say that I’m rather experimenting then writing a new module.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">In the switch_ivr_play_file() I’ve just skipped IF condition which checks the status of channel flag CF_HOLD.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Hold operation is called from our application layer by switch_api_execute(“uui_hold”,<wbr>…).<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Best regards,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Miro<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Brian West [mailto:<a href="mailto:brian@freeswitch.org" target="_blank">brian@freeswitch.org</a>]
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<b>Sent:</b> Thursday, November 3, 2016 8:05 PM<br>
<b>To:</b> FreeSWITCH Users Help <<a href="mailto:freeswitch-users@lists.freeswitch.org" target="_blank">freeswitch-users@lists.<wbr>freeswitch.org</a>><br>
<b>Subject:</b> Re: [Freeswitch-users] Jitter during on-hold<u></u><u></u></span></p><div><div class="h5">
<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">So it sounds like you're writing your own module, How are you doing this hold operation?<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">/b<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">On Thu, Nov 3, 2016 at 10:53 AM, Miroslav Levanic <<a href="mailto:Miroslav.Levanic@enghouse.com" target="_blank">Miroslav.Levanic@enghouse.com</a><wbr>> wrote:<u></u><u></u></p>
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<p class="MsoNormal">Hello,<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">I’m trying to play from file when other party is set on–hold.
<u></u><u></u></p>
<p class="MsoNormal">reINVITE sent by FreeSwitch contains sendonly attribute which opens possibility that FreeSwitch can play something to other end although other party is on-hold.
<u></u><u></u></p>
<p class="MsoNormal">I’ve used modified switch_ivr_play_file() function which by default prevents sending rtp packets to other side when call is on-hold.<u></u><u></u></p>
<p class="MsoNormal">I’ve encountered rtp stream issue causing distorted audio due to dropped packets on the caller end. <u></u><u></u></p>
<p class="MsoNormal">Codec used is G.711 mulaw 8kHz and ptime is 20ms accepted on both side, FreeSwitch and softphone. Both endpoints are located in the local LAN.<u></u><u></u></p>
<p class="MsoNormal">Wireshark rtp analysis shows that when call is not on-hold, packets comes in interval of 20ms as expected. But when the call is set on-hold, average delta time between packets is
21ms, causing dropping packet every second (1ms extra time multiplied by 50 packets per second) with jitter buffer set to 50ms in Wireshark.<u></u><u></u></p>
<p class="MsoNormal">Setting "auto-jitterbuffer-msec" parameter in sofia did not help.<u></u><u></u></p>
<p class="MsoNormal">Is there a serious reason why I cannot use switch_ivr_play_file() during on-hold and what could cause jitter only during on-hold period? When call is retrieved from hold, jitter
disappears and audio is good again. <u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">Thanks,<u></u><u></u></p>
<p class="MsoNormal">Miro<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">-- <u></u><u></u></p>
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<p><b><i><span style="font-size:13.5pt;font-family:"Courier New"">Brian West</span></i></b><span style="font-family:"Courier New""><br>
</span><span style="font-size:10.0pt;font-family:"Courier New""><a href="mailto:brian@freeswitch.org" target="_blank">brian@freeswitch.org</a></span><u></u><u></u></p>
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<a href="http://www.freeswitch.org" rel="noreferrer" target="_blank">http://www.freeswitch.org</a><br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr">
<p><font face="courier new, monospace"><b><i><font size="4">Brian West</font></i></b><br><span style="font-size:x-small"><a href="mailto:brian@freeswitch.org" target="_blank">brian@freeswitch.org</a></span></font></p>
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