[Freeswitch-users] comfort noise and opus

[Michael Jerris]

This is quite old FreeSWITCH code, almost 2 years old.  We’ve done significant work on opus support since then, i would start before you make any assumptions switching to the latest release 1.6.10.


> On Sep 20, 2016, at 3:42 PM, Russell Treleaven <rtreleaven at bunnykick.ca> wrote:
> 
> I noticed something that I thought I would share for the benefit of others.
> 
> FreeSWITCH Version 1.5.15b+git~20141215T224714Z~0b414a8de8~64bit (git 0b414a8 2014-12-15 22:47:14Z 64bit)
> Linphone 3.9.1
> 
> To reproduce
> place a call with linphone using opus to a freeswitch server voicemail extension.
> listen to the outgoing message and leave a voicemail after the prompt.
> 
> observed
> Fairly loud comfort noise is heard while leaving the message.
> 
> expected
> should hear silence instead of comfort noise.
> 
> If we change the codec to pcmu we hear silence instead of comfort noise.
> Comfort noise is heard because after the outgoing message freeswitch stops sending rtp.
> 
> workaround
> add this to the voicemail extension before the answer application.
> 	<action
> 		application="set"
> 		data="record_waste_resources=true"
> 	></action>
> 
> Sincerely,
> 
> Russell Treleaven
> 
>