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<p class="MsoNormal"><span style="color:#1F497D">By the way, in contrast, I created an XML block that plays the same messages as mod_voicemail (see block below). When this XML block is executed, there is no clipping of words when using wideband codec BV32.
This is why I'm thinking it's related to delays caused by mod_voicemail processing.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Courier New""> <extension name="test_message"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Courier New""> <condition field="destination_number" expression="^\*105$"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Courier New""> <action application="answer"/><o:p></o:p></span></p>
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<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Courier New""> <action application="playback" data="/opt/teoswitch/sounds/en/us/callie/voicemail/vm-hello.wav"/><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Courier New""> <action application="playback" data="/opt/teoswitch/sounds/en/us/callie/voicemail/vm-you_have.wav"/><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Courier New""> <action application="say" data="en number pronounced 1"/><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Courier New""> <action application="playback" data="/opt/teoswitch/sounds/en/us/callie/voicemail/vm-new.wav"/><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Courier New""> <action application="playback" data="/opt/teoswitch/sounds/en/us/callie/voicemail/vm-messages.wav"/><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Courier New""> <action application="playback" data="/opt/teoswitch/sounds/en/us/callie/voicemail/vm-you_have.wav"/><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Courier New""> <action application="say" data="en number pronounced 2"/><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Courier New""> <action application="playback" data="/opt/teoswitch/sounds/en/us/callie/voicemail/vm-saved.wav"/><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Courier New""> <action application="playback" data="/opt/teoswitch/sounds/en/us/callie/voicemail/vm-messages.wav"/><o:p></o:p></span></p>
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<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Courier New""> <action application="say" data="en number pronounced 1"/><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Courier New""> <action application="sleep" data="100"/><o:p></o:p></span></p>
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<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Courier New""> </extension><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Jerry<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><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""> freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org]
<b>On Behalf Of </b>Jerry Richards<br>
<b>Sent:</b> Thursday, May 10, 2012 8:23 AM<br>
<b>To:</b> FreeSWITCH Users Help<br>
<b>Subject:</b> [Freeswitch-users] Gaps In RTP (wideband) Packets From mod_voicemail<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<pre><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I'm seeing a audio problem when listening to the operator when calling into voicemail to listen to messages and a wideband codec is used. Looking at a wireshark trace, I see gaps between transmitted RTP packets that exceed the jitter buffer depth in the endpoint softphone, causing underflow. This causes clipping of the front-end of words such as "Pressed" sounds like 'ess' and "Last name" sounds like 'ast name'. While this is generally not noticeable with the G.711 codec, it causes these clipped audio phrases with wideband codecs, such as BV32. It might be due to the processing delay in mod_voicemail between phrases?<o:p></o:p></span></pre>
<pre><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></pre>
<pre><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Has anyone seen this? Is there a tag to help improve this?<o:p></o:p></span></pre>
<pre><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></pre>
<pre><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks,<o:p></o:p></span></pre>
<pre><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Jerry<o:p></o:p></span></pre>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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