KMS answering with PCMU instead of OPUS

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agb...@gmail.com

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Jan 25, 2016, 6:26:34 PM1/25/16
to kurento
Hi

My OpenWebRTC iOS client offers Opus to KMS, but KMS responds with PCMU. I must be doing something wrong because Opus works fine with both Kurento and OpenWebRTC's examples. It's only my client that isn't working properly. Can someone who understands SDP suggest what the issue might be?

I'm using OpenWebRTC 3.1.0 on iOS from the CocoaPod, KMS 6.3.1 on Ubuntu 14.04 and kurento-examples 6.1.0.


Failing offer from my iOS client:

v=0

o=- 1453762830611886000 1 IN IP4 127.0.0.1

s=-

t=0 0

m=audio 9 UDP/TLS/RTP/SAVPF 111 8 0

c=IN IP4 0.0.0.0

a=rtcp-mux

a=sendrecv

a=rtpmap:111 OPUS/48000/2

a=rtpmap:8 PCMA/8000

a=rtpmap:0 PCMU/8000

a=ice-ufrag:ZfjL

a=ice-pwd:wiaY1VPsHvoJuKehvpHvcd

a=candidate:1 1 UDP 2013266431 192.168.0.109 62741 typ host

a=candidate:2 1 TCP 1019216383 192.168.0.109 0 typ host tcptype active

a=candidate:3 1 TCP 1015022079 192.168.0.109 59776 typ host tcptype passive

a=candidate:4 1 UDP 2013266431 21.57.2.200 59013 typ host

a=candidate:5 1 TCP 1019216383 21.57.2.200 0 typ host tcptype active

a=candidate:6 1 TCP 1015022079 21.57.2.200 59777 typ host tcptype passive

a=candidate:7 1 UDP 1677722111 104.193.168.123 62741 typ srflx raddr 192.168.0.109 rport 62741

a=candidate:8 1 TCP 847249919 104.193.168.123 0 typ srflx raddr 192.168.0.109 rport 0 tcptype active

a=candidate:9 1 TCP 843055615 104.193.168.123 59776 typ srflx raddr 192.168.0.109 rport 59776 tcptype passive

a=candidate:10 1 UDP 167772671 52.34.12.79 52204 typ relay raddr 192.168.0.109 rport 62741

a=candidate:11 1 UDP 1677722111 172.56.38.55 23575 typ srflx raddr 21.57.2.200 rport 59013

a=candidate:12 1 TCP 847249919 172.56.38.55 0 typ srflx raddr 21.57.2.200 rport 0 tcptype active

a=candidate:13 1 TCP 843055615 172.56.38.55 59777 typ srflx raddr 21.57.2.200 rport 59777 tcptype passive

a=candidate:14 1 UDP 167772671 52.34.12.79 52540 typ relay raddr 21.57.2.200 rport 59013

a=fingerprint:sha-256 1B:9B:75:82:12:6F:62:6E:13:9D:44:08:98:FD:1B:B7:59:90:42:D9:21:B5:D5:BF:2D:12:A2:5E:42:D6:1B:32

a=setup:actpass


Failing answer from Kurento:


v=0

o=- 3662751690 3662751690 IN IP4 0.0.0.0

s=Kurento Media Server

c=IN IP4 0.0.0.0

t=0 0

m=audio 1 UDP/TLS/RTP/SAVPF 0

a=rtcp:9 IN IP4 0.0.0.0

a=rtpmap:0 PCMU/8000

a=rtcp-mux\r\na=sendrecv

a=setup:active

a=ssrc:1696434368 cname:user4093618648@host-48c0043e

a=ice-ufrag:u2IR

a=ice-pwd:LQ4WwHdxQPVoylNGdDuaCq

a=fingerprint:sha-256 7D:AE:11:65:13:E8:04:5F:93:4D:08:1C:B7:DB:5B:1A:7F:FC:C7:03:DA:6E:E6:07:C0:30:A3:26:AD:BA:8B:F5

a=mid:audio0



Working offer from OpenWebRTC iOS example:


v=0

o=- 1453758582241878800 1 IN IP4 127.0.0.1

s=-

t=0 0

m=audio 9 UDP/TLS/RTP/SAVPF 111 8 0

c=IN IP4 0.0.0.0

a=rtcp-mux

a=sendrecv

a=rtpmap:111 OPUS/48000/2

a=rtpmap:8 PCMA/8000

a=rtpmap:0 PCMU/8000

a=ice-ufrag:pqN1

a=ice-pwd:RGnpBUw4OkfwvX/nV8/hEF

a=candidate:1 1 UDP 2013266431 192.168.0.109 49470 typ host

a=candidate:2 1 TCP 1019216383 192.168.0.109 0 typ host tcptype active

a=candidate:3 1 TCP 1015022079 192.168.0.109 59381 typ host tcptype passive

a=candidate:4 1 UDP 2013266431 21.57.2.200 50383 typ host

a=candidate:5 1 TCP 1019216383 21.57.2.200 0 typ host tcptype active

a=candidate:6 1 TCP 1015022079 21.57.2.200 59382 typ host tcptype passive

a=fingerprint:sha-256 8E:34:A6:32:46:CE:42:0B:68:63:FF:E7:A5:28:41:14:31:03:EA:82:E9:25:04:14:4E:7A:7E:83:39:24:29:06

a=setup:actpass


Working response from Firefox (this is SDPARTA?!):


v=0

o=mozilla...THIS_IS_SDPARTA-43.0.4 8342453544048456001 1 IN IP4 0.0.0.0

s=-

t=0 0

a=sendrecv

a=fingerprint:sha-256 92:83:00:C4:68:32:75:72:31:D1:DE:AA:49:48:EC:9E:78:DE:79:6B:99:EF:28:83:3B:8F:4B:F9:A2:9C:44:E5

a=ice-options:trickle

a=msid-semantic:WMS *

m=audio 9 UDP/TLS/RTP/SAVPF 111

c=IN IP4 0.0.0.0

a=sendrecv

a=ice-pwd:599b2acc8d612bbd824d6f9073cb4dc7

a=ice-ufrag:c9dab545

a=msid:{b5298923-bae9-df4f-81d1-1595f7398c8c} {fe20a0d6-62d0-dc48-b111-2d441462bd77}

a=rtcp-mux

a=rtpmap:111 opus/48000/2

a=setup:active

a=ssrc:850628871 cname:{03852673-ef7b-6841-8143-a82a7ba968db}



Working offer from Chrome:


v=0

o=- 6173715873495085370 2 IN IP4 127.0.0.1

s=-

t=0 0

a=group:BUNDLE audio video

a=msid-semantic: WMS kCSNTP64nZnLPwxXlznz5wkDgl4XpXOlnOE2

m=audio 9 UDP/TLS/RTP/SAVPF 111 103 104 9 0 8 106 105 13 126

c=IN IP4 0.0.0.0

a=rtcp:9 IN IP4 0.0.0.0

a=ice-ufrag:aEUgIuDoxc0dP4EP

a=ice-pwd:CPD0RmswYeHHD2+IwWw5WlxV

a=fingerprint:sha-256 90:F0:40:32:F4:2C:B7:34:75:F4:C9:6D:2E:76:7F:08:EF:E1:48:F4:A6:20:1F:45:2A:FC:14:AE:74:E9:91:8A

a=setup:actpass

a=mid:audio

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

a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time

a=sendrecv

a=rtcp-mux

a=rtpmap:111 opus/48000/2

a=fmtp:111 minptime=10; useinbandfec=1

a=rtpmap:103 ISAC/16000

a=rtpmap:104 ISAC/32000

a=rtpmap:9 G722/8000

a=rtpmap:0 PCMU/8000

a=rtpmap:8 PCMA/8000

a=rtpmap:106 CN/32000

a=rtpmap:105 CN/16000

a=rtpmap:13 CN/8000

a=rtpmap:126 telephone-event/8000

a=maxptime:60

a=ssrc:3514090620 cname:UE1UOMssnCGaXjZl

a=ssrc:3514090620 msid:kCSNTP64nZnLPwxXlznz5wkDgl4XpXOlnOE2 e6fe3559-2191-4bfe-8ce3-1e871f58b92d

a=ssrc:3514090620 mslabel:kCSNTP64nZnLPwxXlznz5wkDgl4XpXOlnOE2

a=ssrc:3514090620 label:e6fe3559-2191-4bfe-8ce3-1e871f58b92d

m=video 9 UDP/TLS/RTP/SAVPF 100 116 117 96

c=IN IP4 0.0.0.0

a=rtcp:9 IN IP4 0.0.0.0

a=ice-ufrag:aEUgIuDoxc0dP4EP

a=ice-pwd:CPD0RmswYeHHD2+IwWw5WlxV

a=fingerprint:sha-256 90:F0:40:32:F4:2C:B7:34:75:F4:C9:6D:2E:76:7F:08:EF:E1:48:F4:A6:20:1F:45:2A:FC:14:AE:74:E9:91:8A

a=setup:actpass

a=mid:video

a=extmap:2 urn:ietf:params:rtp-hdrext:toffset

a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time

a=extmap:4 urn:3gpp:video-orientation

a=sendrecv

a=rtcp-mux

a=rtpmap:100 VP8/90000

a=rtcp-fb:100 ccm fir

a=rtcp-fb:100 nack

a=rtcp-fb:100 nack pli

a=rtcp-fb:100 goog-remb

a=rtpmap:116 red/90000

a=rtpmap:117 ulpfec/90000

a=rtpmap:96 rtx/90000

a=fmtp:96 apt=100

a=ssrc-group:FID 2390620743 352270136

a=ssrc:2390620743 cname:UE1UOMssnCGaXjZl

a=ssrc:2390620743 msid:kCSNTP64nZnLPwxXlznz5wkDgl4XpXOlnOE2 dc0e1545-0330-43a5-b06b-a6450db6d384

a=ssrc:2390620743 mslabel:kCSNTP64nZnLPwxXlznz5wkDgl4XpXOlnOE2

a=ssrc:2390620743 label:dc0e1545-0330-43a5-b06b-a6450db6d384

a=ssrc:352270136 cname:UE1UOMssnCGaXjZl

a=ssrc:352270136 msid:kCSNTP64nZnLPwxXlznz5wkDgl4XpXOlnOE2 dc0e1545-0330-43a5-b06b-a6450db6d384

a=ssrc:352270136 mslabel:kCSNTP64nZnLPwxXlznz5wkDgl4XpXOlnOE2

a=ssrc:352270136 label:dc0e1545-0330-43a5-b06b-a6450db6d384



Working response from Kurento:


v=0

o=- 3662676097 3662676097 IN IP4 0.0.0.0

s=Kurento Media Server

c=IN IP4 0.0.0.0

t=0 0

a=msid-semantic: WMS kCSNTP64nZnLPwxXlznz5wkDgl4XpXOlnOE2

a=group:BUNDLE audio video

m=audio 1 UDP/TLS/RTP/SAVPF 111 0

a=rtcp:9 IN IP4 0.0.0.0

a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time

a=rtpmap:111 opus/48000/2

a=rtpmap:0 PCMU/8000

a=setup:active

a=mid:audio

a=sendrecv

a=rtcp-mux

a=fmtp:111 minptime=10; useinbandfec=1

a=maxptime:60

a=ssrc:3877972398 cname:user4028155681@host-251055ec

a=ice-ufrag:fDPe

a=ice-pwd:N+Fbig9+6bfmbE4l/wTp7v

a=fingerprint:sha-256 7D:AE:11:65:13:E8:04:5F:93:4D:08:1C:B7:DB:5B:1A:7F:FC:C7:03:DA:6E:E6:07:C0:30:A3:26:AD:BA:8B:F5

m=video 1 UDP/TLS/RTP/SAVPF 100

b=AS:500

a=rtcp:9 IN IP4 0.0.0.0

a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time

a=rtpmap:100 VP8/90000

a=rtcp-fb:100 ccm fir

a=rtcp-fb:100 nack

a=rtcp-fb:100 nack pli

a=rtcp-fb:100 goog-remb

a=setup:active

a=mid:video

a=sendrecv

a=rtcp-mux

a=ssrc:2138775101 cname:user4028155681@host-251055ec

a=ice-ufrag:fDPe

a=ice-pwd:N+Fbig9+6bfmbE4l/wTp7v

a=fingerprint:sha-256 7D:AE:11:65:13:E8:04:5F:93:4D:08:1C:B7:DB:5B:1A:7F:FC:C7:03:DA:6E:E6:07:C0:30:A3:26:AD:BA:8B:F5



Thanks for any help!

Adrian

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Jan 26, 2016, 1:23:07 AM1/26/16
to Kurento Public
I enabled debug logging and Kurento seems to think it doesn't support OPUS:

2016-01-26 06:01:11,240765 29536 [0x00007f7d93fff700]    info KurentoWebRtcEndpointImpl WebRtcEndpointImpl.cpp:68 remove_not_supported_codecs_from_array() <kmswebrtcendpoint0>  Removing not supported codec 'OPUS/48000/2'
2016-01-26 06:01:11,241005 29536 [0x00007f7d93fff700]    info KurentoWebRtcEndpointImpl WebRtcEndpointImpl.cpp:68 remove_not_supported_codecs_from_array() <kmswebrtcendpoint0>  Removing not supported codec 'AMR/8000'
2016-01-26 06:01:11,241133 29536 [0x00007f7d93fff700]    info KurentoWebRtcEndpointImpl WebRtcEndpointImpl.cpp:68 remove_not_supported_codecs_from_array() <kmswebrtcendpoint0>  Removing not supported codec 'H264/90000'

Here is SdpEndpoint.conf.json:

{
  "numAudioMedias" : 1,
  "numVideoMedias" : 1,
  "audioCodecs" : [
    {
      "name" : "OPUS/48000/2"
// Next is an example about how a codec can be configured.
// WARNING: Usage of properties is not yet supported
//      "properties" : {
//        "maxcodedaudiobandwidth" : "16000",
//        "maxaveragebitrate" : "20000",
//        "stereo": "1",
//        "useinbandfec" : "1",
//        "usedtx" : "0"
//      }
    },
    {
      "name" : "PCMU/8000"
    },
    {
      "name" : "AMR/8000"
    }
  ],
  "videoCodecs" : [
    {
      "name" : "VP8/90000"
    },
    {
      "name" : "H264/90000"
    }
  ]
}


sdp_pattern.txt:

v=0
o=- 0 0 IN IP4 0.0.0.0
s=Kurento Media Server
c=IN IP4 0.0.0.0
t=0 0
m=audio 0 RTP/AVP 111 99 0
a=rtpmap:111 OPUS/48000/2
a=rtpmap:99 AMR/8000/1
a=rtpmap:0 PCMU/8000
m=video 0 RTP/AVP 96 97 100 101
a=rtpmap:96 H263-1998/90000
a=rtpmap:97 VP8/90000
a=rtpmap:100 MP4V-ES/90000
a=rtpmap:101 H264/90000

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Jose Antonio Santos Cadenas

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Jan 26, 2016, 2:16:59 AM1/26/16
to Kurento Public

I think that the problem is caused because opus is written in capital letters. If you mangle the sdp before passing it to kms, let the configuration as it was and try again but with opus written in lower case, it should work.

We will try to check and fix this issue asap.


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