Re: Webrtc->SIP Audio Issues

You have to deal with rtp profiles:


*> RTP/AVP, RTP/SAVP, UDP/TLS/RTP/SAVP, RTP/AVPF, RTP/SAVPF,
UDP/TLS/RTP/SAVPF*
Take a look closer to documentation:
https://kamailio.org/docs/modules/6.0.x/modules/rtpengine.html#rtpengine.f.rtpengine_offer

чт, 18 сент. 2025 г. в 20:35, Fernando Lopes via sr-users <
[email protected]>:

> Hello everyone,
>
> I'm currently trying to make WebRTC-to-SIP calls. My setup is: WebRTC →
> WSS → Kamailio → UDP → Asterisk, using rtpengine. I have a route named
> GET_ICE that is called in onreply_route.
> Everything else works: SIP-to-SIP calls and WebRTC messaging are fine.
> Only WebRTC-to-SIP calls have audio issues. I've tested many different ICE
> flags, but without success. In my testing I think I've managed to get audio
> to kamailio but not to webrtc, but decided to rollback to start to get help.
>
> In my PJSIP configuration, I allow these codecs:
> allow=g722,ulaw,vp9,vp8,h264
>
> My Kamailio code:
> route[GET_ICE] {
>     if ( $proto == "wss" ) {
>         if (is_ip_rfc1918("$si")) {
>             $dlg_var(ice) = " ";
>         } else {
>             $dlg_var(ice) = " ICE=remove RTP ";
>
>         }
>     } else {
>         $dlg_var(ice) = "ICE=FORCE";
>     }
> }
>
> route[BUILD_RTPENGINE_PARAMETER] {
>     route(SET_RTP_DIRECTION);   # returns $dlg_var(rtp_direction)
>     if ( is_method("INVITE") ) {
>         route(GET_ICE);             # returns $dlg_var(ice)
>     }
>
>     xlog("L_WARN", "[BUILD_RTPENGINE_PARAMETER] >
> $dlg_var(rtp_direction)\n");
>     $var(rtp_param) = "replace-origin replace-session-connection " +
> $dlg_var(ice) + " " + $dlg_var(rtp_direction);
>     xlog("L_WARN", "[RTPENGINE]: Method $rm status $rs protocol:
> $dlg_var(call_type) -> $dlg_var(rtp_direction) -> [$dlg_var(ice)]\n");
>     xlog("L_WARN", "[RTPENGINE]: Param: [$var(rtp_param)]\n");
>     rtpengine_manage($var(rtp_param));
> }
>
> My logs:
>
>  3(47) WARNING: <script>: [REPLY] 1xx or 2xx received
>  3(47) WARNING: <script>: [SET_RTP_DIRECTION] -> reply from internal =
> direction=internal direction=external
>  3(47) WARNING: <script>: [BUILD_RTPENGINE_PARAMETER] > direction=internal
> direction=external
>  3(47) WARNING: <script>: [RTPENGINE]: Method INVITE status 200 protocol:
> <null> -> direction=internal direction=external -> []
>  3(47) WARNING: <script>: [RTPENGINE]: Param: [replace-origin
> replace-session-connection  direction=internal direction=external]
> [1758217893.108564] INFO: [ID="m7e648isjm9n96ti62k9"]: [control] Received
> command 'answer' from 10.5.0.8:42938
> [1758217893.108583] INFO: [ID="m7e648isjm9n96ti62k9"]: [core]
> replace-session-connection flag encountered, but not supported anymore.
> [1758217893.108998] WARNING: [ID="m7e648isjm9n96ti62k9"
> tag="f03487ad-0be2-49d5-9452-289c407db828" index="1"]: [core] ICE restart
> detected, but reset not allowed at this point
> [1758217893.109379] INFO: [ID="m7e648isjm9n96ti62k9"]: [control] Replying
> to 'answer' from 10.5.0.8:42938 (elapsed time 0.000804 sec)
> [1758217893.109411] INFO: [ID="m7e648isjm9n96ti62k9"
> tag="f03487ad-0be2-49d5-9452-289c407db828" index="1" port="14656"]: [ice]
> ICE negotiated: peer for component 1 is 10.5.0.2:28384
> [1758217893.109418] INFO: [ID="m7e648isjm9n96ti62k9"
> tag="f03487ad-0be2-49d5-9452-289c407db828" index="1" port="14656"]: [ice]
> ICE negotiated: local interface 10.5.0.8
>
> [1758217893.208990] INFO: [ID="m7e648isjm9n96ti62k9"
> tag="f03487ad-0be2-49d5-9452-289c407db828" index="1" port="14656"]: [ice]
> ICE negotiated: peer for component 1 is 10.5.0.2:28384
> [1758217893.209036] INFO: [ID="m7e648isjm9n96ti62k9"
> tag="f03487ad-0be2-49d5-9452-289c407db828" index="1" port="14656"]: [ice]
> ICE negotiated: local interface 10.5.0.8
> [1758217894.111112] INFO: [ID="m7e648isjm9n96ti62k9"
> tag="f03487ad-0be2-49d5-9452-289c407db828" index="1" port="14656"]:
> [crypto] DTLS: Peer certificate accepted
> [1758217894.112292] INFO: [ID="m7e648isjm9n96ti62k9"
> tag="f03487ad-0be2-49d5-9452-289c407db828" index="1" port="14656"]:
> [crypto] DTLS-SRTP successfully negotiated using AES_CM_128_HMAC_SHA1_80
> [1758217894.112341] INFO: [ID="m7e648isjm9n96ti62k9"
> tag="f03487ad-0be2-49d5-9452-289c407db828" index="1" port="14656"]:
> [crypto] DTLS-SRTP successfully negotiated using AES_CM_128_HMAC_SHA1_80
> [1758217896.299109] INFO: [ID="m7e648isjm9n96ti62k9"
> tag="f03487ad-0be2-49d5-9452-289c407db828" index="1" port="14656"]: [core]
> Confirmed peer address as 10.5.0.2:28384
> [1758217896.299174] ERR: [ID="m7e648isjm9n96ti62k9"
> tag="f03487ad-0be2-49d5-9452-289c407db828" index="1" port="14656"]: [srtp]
> SRTP output wanted, but no crypto suite was negotiated
> [1758217901.298677] ERR: [ID="m7e648isjm9n96ti62k9"
> tag="f03487ad-0be2-49d5-9452-289c407db828" index="1" port="14656"]: [rtcp]
> SRTCP output wanted, but no crypto suite was negotiated
>
> [1758217930.743494] INFO: [ID="483961fa065a4df9b5f76059c8a1a3e3"]: [core]
> Closing call due to timeout
> [1758217930.743636] INFO: [ID="483961fa065a4df9b5f76059c8a1a3e3"]: [core]
> Final packet stats:
> [1758217930.743651] INFO: [ID="483961fa065a4df9b5f76059c8a1a3e3"]: [core]
> --- Tag '2bad2cacef0945b1a506a198aeb4ae01', created 1:00 ago for branch ''
> [1758217930.743659] INFO: [ID="483961fa065a4df9b5f76059c8a1a3e3"]: [core]
> ------ Media #1 (audio over RTP/AVP) using unknown codec
> [1758217930.743670] INFO: [ID="483961fa065a4df9b5f76059c8a1a3e3"]: [core]
> --------- Port        10.5.0.8:15028 <>    172.31.208.1:4000 , SSRC 0, in
> 0 p, 0 b, 0 e, 60 ts, out 0 p, 0 b, 0 e
> [1758217930.743677] INFO: [ID="483961fa065a4df9b5f76059c8a1a3e3"]: [core]
> --------- Port        10.5.0.8:15029 <>    172.31.208.1:4001  (RTCP),
> SSRC 0, in 0 p, 0 b, 0 e, 60 ts, out 0 p, 0 b, 0 e
> [1758217930.743683] INFO: [ID="483961fa065a4df9b5f76059c8a1a3e3"]: [core]
> --- Tag '88cf8c49-cdfc-475e-8075-a3ce0a36ecca', created 1:00 ago for branch
> ''
> [1758217930.743687] INFO: [ID="483961fa065a4df9b5f76059c8a1a3e3"]: [core]
> ------ Media #1 (audio over RTP/AVP) using unknown codec
> [1758217930.743693] INFO: [ID="483961fa065a4df9b5f76059c8a1a3e3"]: [core]
> --------- Port        10.5.0.8:17956 <>        10.5.0.2:64570, SSRC 0, in
> 0 p, 0 b, 0 e, 60 ts, out 0 p, 0 b, 0 e
> [1758217930.743699] INFO: [ID="483961fa065a4df9b5f76059c8a1a3e3"]: [core]
> --------- Port        10.5.0.8:17957 <>        10.5.0.2:64571 (RTCP),
> SSRC 0, in 0 p, 0 b, 0 e, 60 ts, out 0 p, 0 b, 0 e
>
> Thank you.
> __________________________________________________________
> Kamailio - Users Mailing List - Non Commercial Discussions --
> [email protected]
> To unsubscribe send an email to [email protected]
> Important: keep the mailing list in the recipients, do not reply only to
> the sender!
>

__________________________________________________________
Kamailio - Users Mailing List - Non Commercial Discussions -- [email protected]
To unsubscribe send an email to [email protected]
Important: keep the mailing list in the recipients, do not reply only to the sender!