ILBC audio codec not supported in chrome when using janus gateway?

[weili yang]

My sip server only support ILBC codec, using janus gateway to proxy webRTC, when I use  chrome v59.0.3071.115 64bit to make call, i got the error in chrome console:

"Uncaught (in promise) DOMException: Failed to set remote offer sdp: Session error code: ERROR_CONTENT. Session error description: Failed to set remote audio description send parameters.."

do anybody know about that?

[Lorenzo Miniero]

Can you provide an SDP that works and one that doesn't with iLBC? Maybe there's something we do (or don't) in Janus when negotiating iLBC that makes Chrome complain.

L.

[Eduardo Gondim]

I believe I can confirm this:

v=0

o=- 605826346156668998 2 IN IP4 127.0.0.1

s=-

t=0 0

a=group:BUNDLE audio

a=msid-semantic: WMS C9q0v8C4ozDRkm36nO12NQZG9miGkTy9hZlf

m=audio 9 UDP/TLS/RTP/SAVPF 97 8 110 112 113 126

c=IN IP4 0.0.0.0

a=rtcp:9 IN IP4 0.0.0.0

a=ice-ufrag:IJh4

a=ice-pwd:W7QV2/Lb0V/WP0jvdAzgfvuN

a=fingerprint:sha-256 C6:0D:06:E9:81:AE:2B:42:74:57:22:01:14:4F:34:E7:5E:4D:F2:34:CB:AB:FD:6C:1E:05:E6:05:2E:91:22:63

a=setup:actpass

a=mid:audio

a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level

a=sendrecv

a=rtcp-mux

a=rtpmap:97 iLBC/8000

a=rtpmap:8 PCMA/8000

a=rtpmap:110 telephone-event/48000

a=rtpmap:112 telephone-event/32000

a=rtpmap:113 telephone-event/16000

a=rtpmap:126 telephone-event/8000

a=ssrc:4291303445 cname:S60ZQ47H2X1AK0H5

a=ssrc:4291303445 msid:C9q0v8C4ozDRkm36nO12NQZG9miGkTy9hZlf 57669bec-4d14-46be-b155-5db2a131a43d

a=ssrc:4291303445 mslabel:C9q0v8C4ozDRkm36nO12NQZG9miGkTy9hZlf

a=ssrc:4291303445 label:57669bec-4d14-46be-b155-5db2a131a43d

Uncaught (in promise) DOMException: Failed to set local offer sdp: Session error code: ERROR_CONTENT. Session error description: Failed to set local audio description recv parameters..

Please note that i was trying to manually insert iLBC.

[Karl Wiberg]

Chromium builds WebRTC without iLBC support: https://chromium.googlesource.com/external/webrtc/+/master/webrtc/webrtc.gni#176

This has been the case for a long time.

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Karl Wiberg |

Software Engineer |

kwi...@google.com |

+46 70 696 1024