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<p>Hi,</p>
<p>to understand how codec negotiation work check
<a class="moz-txt-link-freetext" href="https://freeswitch.org/confluence/display/FREESWITCH/Codec+Negotiation">https://freeswitch.org/confluence/display/FREESWITCH/Codec+Negotiation</a>
<br>
</p>
<p>Also, you may want to enable inherit_codec parameter this way the
codec negotiated in bleg is first match against codecs from aleg.
<br>
</p>
<p><br>
</p>
<p>Also, another simple way to avoid transcoding is set only one
codec in the configuration, set:</p>
<p><X-PRE-PROCESS cmd="set" data="global_codec_prefs=PCMU"/> <br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 07/11/2018 13:55, Ulrich Backes
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:380673553.633982.1541595357082@webmail.strato.de">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<meta charset="UTF-8">
<p>Hi guys,<br>
<br>
I've investigated many hours and cannot solve this problem:<br>
A and B should use g711u. </p>
<p><br>
A: <img src="cid:part1.E3195C2F.1026F7CF@wirelessmundi.com"
style="max-width: 100%;" class="aspect-ratio" alt=""
from_clipboard="true"></p>
<p><br>
B: <img src="cid:part2.8E467D16.0F9F7802@wirelessmundi.com"
style="max-width: 100%;" class="aspect-ratio" alt=""
from_clipboard="true"><br>
<br>
But FreeSwitch decides to transcode:<br>
</p>
<p> <img src="cid:part3.F832E2A5.A9CE4AB1@wirelessmundi.com"
style="max-width: 100%;" class="aspect-ratio" alt=""
from_clipboard="true"><br>
The settings:<br>
vars.xml<br>
<X-PRE-PROCESS cmd="set"
data="media_mix_inbound_outbound_codecs=false"/> <br>
<X-PRE-PROCESS cmd="set"
data="global_codec_prefs=OPUS,G722,PCMU,PCMA,VP8"/> <br>
<br>
internal.xml<br>
<param name="inbound-codec-negotiation" value="greedy"/><br>
<param name="inbound-late-negotiation" value="true"/> <br>
<param name="disable-transcoding" value="true"/> <br>
<br>
<param name="inbound-proxy-media" value="false"/> <br>
<param name="inbound-bypass-media" value="false"/><br>
<param name="inbound-codec-prefs"
value="$${global_codec_prefs}"/><br>
<param name="outbound-codec-prefs"
value="$${global_codec_prefs}"/><br>
<br>
default.xml (Using the demo-Dialplan)<br>
<extension name="Local_Extension"><br>
...<br>
<br>
Using FS v 1.8</p>
<p>Thanks.<br>
Uli<br>
<br>
</p>
<br>
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<pre class="moz-signature" cols="72">--
Saludos / Regards / Cumprimentos
António Silva</pre>
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