[Freeswitch-users] Distorted sound with JsSIP WebRTC and latest freeswitch

Fri Mar 7 17:02:46 MSK 2014

Not sure what you’re doing but webrtc.freeswitch.org is running:

FreeSWITCH Version 1.5.11b+git~20140307T043256Z~f9f36993e8~64bit (git f9f3699 2014-03-07 04:32:56Z 64bit)

Everything sounds fine, you should try the code from now.

--
Brian West
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FreeSWITCH Solutions, LLC
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On Mar 7, 2014, at 5:07 AM, Jayesh Nambiar <jayesh1017 at gmail.com> wrote:

> Hi,
> I've been working on Freeswitch and WebRTC applications for quite some time. I was working on Freeswitch version (git c811580 2013-09-06 00:55:50Z) and the voice quality was always good with that version.
> Today I upgraded to the latest master version (git f9f3699 2014-03-07 04:32:56Z 64bit) and suddenly the sound that goes out of the WebRTC client is always distorted/choppy. I also tried with few versions which got committed in February but they also had choppy sound.
> 
> The call scenario is as follows:
> Normal SIP Endpoint calls a WebRTC endpoint. I have enforced PCMU for the leg going towards WebRTC as I had read about some problems using OPUS codec with freeswitch here https://code.google.com/p/webrtc/issues/detail?id=2768. 
> My outgoing dial-string looks as below:
> {sip_invite_domain=${context},absolute_codec_string=PCMU,media_webrtc=true}sofia/abc.com/${sip_req_uri}
> 
> Sofia parameters are as follows:
> <param name="sip-trace" value="off"/>
> <param name="log-auth-failures" value="true"/>
> <param name="sip-ip" value="203.XXX.123.57"/>
> <param name="rtp-ip" value="203.XXX.123.57"/>
> <param name="sip-port" value="5000"/>
> <param name="context" value="abc.com"/>          
> <param name="dtmf-type" value="rfc2833"/>
> <param name="rfc2833-pt" value="101"/>
> <param name="dtmf-duration" value="2000"/>
> <param name="caller-id-in-from" value="true"/>
> <param name="caller-id-type" value="pid"/>       
> <param name="suppress-cng" value="true"/>
> <param name="inbound-codec-prefs" value="OPUS,G722,PCMU,PCMA"/>
> <param name="outbound-codec-prefs" value="PCMU,PCMA"/>
> <param name="rtp-timeout-sec" value="300"/>
> <param name="rtp-hold-timeout-sec" value="300"/>
> <param name="outbound-use-uuid-as-callid" value="true"/>
> 
> I generally encountered such distorted quality with WebRTC when CN was advertised in SDP going towards JS-SIP. This is the reason I added suppress-sng as true in the profile. My outgoing SDP is as follows:
> 
> v=0.
> o=FreeSWITCH 1394161698 1394161699 IN IP4 203.XXX.123.57.
> s=FreeSWITCH.
> c=IN IP4 203.XXX.123.57.
> t=0 0.
> a=msid-semantic: WMS lBMrtzG9kpA0bTRb2XqCeNEeEVGsBGsM.
> m=audio 17482 RTP/SAVPF 0 101.
> a=rtpmap:101 telephone-event/8000.
> a=fingerprint:sha-256 A2:DD:5A:FE:03:98:BB:59:A5:67:EE:D2:B1:DF:B9:E7:84:7C:D0:1D:C2:68:39:EF:60:E6:5B:48:E9:72:CB:5B.
> a=rtcp-mux.
> a=rtcp:17482 IN IP4 203.XXX.123.57.
> a=ssrc:2871096156 cname:744rtBqDQQuSAcTt.
> a=ssrc:2871096156 msid:lBMrtzG9kpA0bTRb2XqCeNEeEVGsBGsM a0.
> a=ssrc:2871096156 mslabel:lBMrtzG9kpA0bTRb2XqCeNEeEVGsBGsM.
> a=ssrc:2871096156 label:lBMrtzG9kpA0bTRb2XqCeNEeEVGsBGsMa0.
> a=ice-ufrag:09V4Nq9hcFADbSg9.
> a=ice-pwd:Maq6BHzioU0OWK7M.
> a=candidate:5046006301 1 udp 659136 203.XXX.123.57 17482 typ host generation 0.
> a=candidate:5046006301 2 udp 659136 203.XXX.123.57 17482 typ host generation 0.
> a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:sV6KRgjWRIajcY4QqbNBQeUxxjh90KbdtfAwdmo2.
> a=silenceSupp:off - - - -.
> a=ptime:20.
> 
> Is there anything that I can add or remove to fix this quality problem or any new channel variable related to webrtc that has been added but not documented anywhere. The sound going towards JS-SIP sounds acceptable but the sound going outside JS-SIP is distorted. Any help here will be appreciated as this quality problem doesn't allow me to move to new versions and stay updated !!
> 
> 
> Thanks,
> 
> --- Jayesh
> _________________________________________________________________________
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> 
> 
> 
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