<div dir="ltr">You can either:<div><br></div><div>1. proxy media </div><div><span style="font-weight:bold;color:rgb(95,99,104);font-family:arial,sans-serif;font-size:14px"><action application</span><span style="color:rgb(77,81,86);font-family:arial,sans-serif;font-size:14px"> = "</span><span style="font-weight:bold;color:rgb(95,99,104);font-family:arial,sans-serif;font-size:14px">set</span><span style="color:rgb(77,81,86);font-family:arial,sans-serif;font-size:14px">" </span><span style="font-weight:bold;color:rgb(95,99,104);font-family:arial,sans-serif;font-size:14px">data</span><span style="color:rgb(77,81,86);font-family:arial,sans-serif;font-size:14px"> = "</span><span style="font-weight:bold;color:rgb(95,99,104);font-family:arial,sans-serif;font-size:14px">proxy_media</span><span style="color:rgb(77,81,86);font-family:arial,sans-serif;font-size:14px">=</span><span style="font-weight:bold;color:rgb(95,99,104);font-family:arial,sans-serif;font-size:14px">true</span><span style="color:rgb(77,81,86);font-family:arial,sans-serif;font-size:14px">" /></span><br></div><div>This is something I would not recommend as proxy-media is not the standard way FS works. But it will preserve the seq gaps client B-> Freeswitch and it's lightweight. </div><div><br></div><div>2. use JB + FEC and also have FS enable FEC on encoding so client A has FEC info as well. This makes more sense because client A <- FS can be subject of packet loss too (new gaps). It is heavy (transcoding twice) but in a network environment subject to a lot of packet loss improves quality.</div><div><br></div><div>So in your case OPUS->FS(bridge)->OPUS with JB might be right.</div><div><br></div><div>But there may be other solutions apart from these.</div><div><br></div><div>Cheers,</div><div>Dragos</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, May 13, 2020 at 10:16 AM Alexander Haugg <<a href="mailto:Alexander.Haugg@c4b.de">Alexander.Haugg@c4b.de</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div lang="DE">
<div class="gmail-m_-2470387844425511730WordSection1">
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">Hi,<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">thanks for the fast answer.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">How is it possible to transport the package lost information from the “leg Client B” to the “leg Client A”?<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">If I understand You correct, for the bridged scenario OPUS to OPUS I don’t start a JB on Freeswitch side?<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">Without the JB the OPUS FEC feature cannot used on the Freeswitch.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">For this case, the Client A need the package lost information from the “leg Client B” to repair the stream via FEC info.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">The sequence numbers for the “leg Client A” will set new, completely independent from the sequence numbers of the “leg
Client B”, for which reason the Client A have no PL (package lost) information. <u></u>
<u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> OPUS OPUS<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">Client A (JB) <--------------------- FreeSwitch <------------------- Client B<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> No PL info Package lost<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> Because new<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> Sequence Numbering<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">Is there a FreeSwitch pattern to solve this problem? Or is it not solvable without JB on FreeSwitch side?<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">Thanks a lot!<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif">Von:</span></b><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif"> FreeSWITCH-users <freeswitch-users-bounces@lists.freeswitch.or</span><span style="font-size:11pt;font-family:Calibri,sans-serif">g>
<b>Im Auftrag von </b>Dragos Oancea<br>
<b>Gesendet:</b> Dienstag, 12. Mai 2020 14:49<br>
<b>An:</b> FreeSWITCH Users Help <<a href="mailto:freeswitch-users@lists.freeswitch.org" target="_blank">freeswitch-users@lists.freeswitch.org</a>><br>
<b>Betreff:</b> Re: [Freeswitch-users] OPUS: Jitter Buffer for bridged calls to use FEC?<u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<p class="MsoNormal">That snip of documentation for JB is pretty old and obsolete I'd say, it does not mention transcoding + FEC .<u></u><u></u></p>
<div>
<p class="MsoNormal">But where transcoding is used/needed is like a "point of termination".<u></u><u></u></p>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">Relevant docs (and best practices) about OPUS + JB + FEC here:<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><a href="https://freeswitch.org/confluence/display/FREESWITCH/FreeSWITCH+And+The+Opus+Audio+Codec" target="_blank">https://freeswitch.org/confluence/display/FREESWITCH/FreeSWITCH+And+The+Opus+Audio+Codec</a><u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">If there's no JB then it can't be any FEC decoding.<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">If you just do OPUS->FS(bridge)->OPUS then no point of enabling the JB, it only adds delay.<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
</div>
<div>
<p class="MsoNormal">Cheers,<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal">Dragos<u></u><u></u></p>
</div>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<div>
<p class="MsoNormal">On Tue, May 12, 2020 at 10:23 AM Alexander Haugg <<a href="mailto:Alexander.Haugg@c4b.de" target="_blank">Alexander.Haugg@c4b.de</a>> wrote:<u></u><u></u></p>
</div>
<blockquote style="border-top:none;border-right:none;border-bottom:none;border-left:1pt solid rgb(204,204,204);padding:0cm 0cm 0cm 6pt;margin-left:4.8pt;margin-right:0cm">
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<div>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">Hi,</span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> </span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">I try to find out the best practice to use the OPUS features.</span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">The scenario is:</span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> </span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">Client A -------> (JitterBuffer) FreeSwitch -----------------------> Client B
</span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> <---------------------- FreeSwitch (JitterBuffer) <--------</span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> </span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">Is this the correct way?</span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> </span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">In the documentation for OPUS the message is, JitterBuffer is needed to use FEC.</span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">But in the documentation for the JitterBuffer is written:</span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> If both sides of a bridge are RTP and both sides have a jb, its fairly</span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> useless. In fact if anything, it can worsen call quality.</span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> </span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> You should only run jitterbuffers at points of termination change of</span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> protocol. Examples, if FS was hosting a conference or IVR, if you are</span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> bridging the call to a phone for instance, you want to not use a</span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> jitterbuffer because you want to preserve the original timestamps so</span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> your phone can use its own jitterbuffer.</span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> </span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> </span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">I think, package lost is the start indicator for FEC and normally the RTP sequence number
is the indicator for package lost, but the sequence number is valid for the own SSRC space only.</span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">That means, if I have lost packages from Client A to Freeswitch is this information on
the other side to client B missing, correct? </span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> </span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">Now the question, what is the best practice handle this scenario?</span><u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> </span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">Thanks a lot!</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">Alex</span><u></u><u></u></p>
</div>
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