<html><font size="2"><font face="Arial">Thank you Yossi, great explanation!</font></font><div><font face="Arial" size="2"><br></font></div><div><font face="Arial" size="2">So if I disable OPUS and use raw audio like PCMA. Does this than have the effect that muted participants get all same bitstream and no individual mixing is happening?<br></font><font size="2"><blockquote style="font-family: arial; border-left-width: 2px; border-left-style: solid; border-left-color: rgb(0, 0, 0); padding-right: 0px; padding-left: 5px; margin-left: 5px; margin-right: 0px;" dir="ltr">--- Ursprüngliche Nachricht ---<br><b>Von:</b> I put the Who? in Mishehu <mishehu@freeswitch.org><br><b>Datum:</b> 24.10.2014 05:06:02<br><b>An:</b> FreeSWITCH Users Help <freeswitch-users@lists.freeswitch.org><br><b>Betreff:</b> Re: [Freeswitch-users] mod_conference / OPUS / 100 participants -> Bad Quality<br><br>
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<div class="moz-cite-prefix">To elaborate on what Brian means by a
stateful codec, it means that the codec can always be changing the
parameters it uses to perform the compression with at any point in
time even on a single call. You cannot just inject an opus
bitstream into an existing call as it may have been compressed
with totally different parameters, and all you would hear is
garbled static. This is also why there is no way to record sound
files in the opus codec for use within FS IVR's, as the files
would need to first be converted back to slin, then from slin back
to opus for that given call.<br>
<br>
<pre class="moz-signature" cols="72">--
Yossi Neiman
On 10/23/2014 09:11 AM, Brian West wrote:
</pre>
</div>
<blockquote cite="mid:CAEJMVkAHXY99Ji8sXuJYNmFVAMSRhyO5Y8Np0oJF0TsexggHow@mail.gmail.com" type="cite">
<div dir="ltr">Not with a stateful codec like OPUS</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Thu, Oct 23, 2014 at 9:25 AM, <span dir="ltr"><<a moz-do-not-send="true" href="mailto:martin.hoole@emailn.de" target="_blank">martin.hoole@emailn.de</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=""><span style="font-family:arial;font-size:small">|
"the stream can't easily be shared"</span>
<div><font face="arial"><br>
</font></div>
</span>
<div><font face="arial">Why not? Once the stream in encoded
we can reattach it to the 95 muted participants?</font></div>
<div><font face="arial">So currently mod_conderence encodes
every muted participant seperate?<br>
<blockquote style="border-left:2px solid
rgb(0,0,0);padding-right:0px;padding-left:5px;margin-left:5px;margin-right:0px" dir="ltr">--- Ursprüngliche Nachricht ---<br>
<b>Von:</b> Brian West <<a moz-do-not-send="true" href="mailto:brian@freeswitch.org" target="_blank">brian@freeswitch.org</a>><br>
<b>Datum:</b> 23.10.2014 14:55:45<br>
<b>An:</b> FreeSWITCH Users Help <<a moz-do-not-send="true" href="mailto:freeswitch-users@lists.freeswitch.org" target="_blank">freeswitch-users@lists.freeswitch.org</a>><br>
<b>Betreff:</b> Re: [Freeswitch-users] mod_conference
/ OPUS / 100 participants -> Bad Quality
<div>
<div class="h5"><br>
<br>
<div dir="ltr">You're out of resources. You'll
hit
the same thing trying to encode to 95
participants as the stream can't easily be
shared.</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Thu, Oct 23, 2014 at
8:45 AM, <span dir="ltr"><<a moz-do-not-send="true" href="mailto:martin.hoole@emailn.de" target="_blank">martin.hoole@emailn.de</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px
#ccc solid;padding-left:1ex">
<div><font face="Arial">I was testing
mod_conference + mod_verto and Opus
enabled.</font></div>
<div><font face="Arial"><br>
</font></div>
<div><font face="Arial">With 100
participants the audio quality decreases
significantly. CPU is almost 100%.</font></div>
<div><span style="font-family:Arial;font-size:small">95
participants are muted but I think their
audio stream also gets encoded and
mixed.</span></div>
<div><span style="font-family:Arial;font-size:small">We
could serve those 95 participants
the same mixed stream? That would save
lots of cpu? </span></div>
<div><br>
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