Failed to produce or consume VP9 in C++ native client (unsupported codec VP9 payloadType 98)

mediasoup libraries
1

I’ve setup my router to support VP8 and VP9 among others. Here’s the config:

mediaCodecs:
        [
          {
            kind: 'audio',
            mimeType: 'audio/opus',
            clockRate: 48000,
            channels: 2
          },
          {
            kind         : 'video',
            mimeType     : 'video/VP9',
            clockRate    : 90000,
            parameters:
              {
                'x-google-start-bitrate': 1000
              }
          },
          {
            kind: 'video',
            mimeType: 'video/VP8',
            clockRate: 90000,
            parameters:
              {
                'x-google-start-bitrate': 1000
              }
          },
          {
            kind       : 'video',
            mimeType   : 'video/H264',
            clockRate  : 90000,
            parameters :
            {
                'packetization-mode'      : 1,
                'level-asymmetry-allowed' : 1
            }
        },
        {
            kind       : 'video',
            mimeType   : 'video/H264',
            clockRate  : 90000,
            parameters :
            {
                'packetization-mode'      : 0,
                'level-asymmetry-allowed' : 1
            }
        },
        {
            kind       : 'video',
            mimeType   : 'video/H265',
            clockRate  : 90000,
            parameters :
            {
               'packetization-mode'      : 1,
               'level-asymmetry-allowed' : 1
            }
        },
        {
            kind       : 'video',
            mimeType   : 'video/H265',
            clockRate  : 90000,
            parameters :
            {
                'packetization-mode'      : 0,
                'level-asymmetry-allowed' : 1
            }
        }
        ]

My Chrome producer and consumer work fine and at first glance C++ client capabilities look same to me (see both their device.rtpCapabilities below).
However, for C++ client mediasoupRouter.canConsume(...) returns false, and transport.produce(...) throws an UnsupportedError exception saying:

UnsupportedError: unsupported codec [mimeType:video/VP9, payloadType:98]
    at Object.getProducerRtpParametersMapping (/Users/peetonn/Documents/Work/videocore-media-server/node_modules/mediasoup/lib/ortc.js:503:19)
    at WebRtcTransport.produce (/Users/peetonn/Documents/Work/videocore-media-server/node_modules/mediasoup/lib/Transport.js:243:33)
    at Socket.<anonymous> (/Users/peetonn/Documents/Work/videocore-media-server/server.js:151:64)
    at Socket.emit (node:events:379:20)
    at /Users/peetonn/Documents/Work/videocore-media-server/node_modules/socket.io/lib/socket.js:528:12
    at processTicksAndRejections (node:internal/process/task_queues:76:11)

What am I missing? Why would router say the codec is not supported when it’s obviously supported (checked Chrome-to-Chrome VP9 streaming)?

Chrome client device.rtpCapabilities:

"rtpCapabilities": {
    "codecs": [
        {
            "mimeType": "audio/opus",
            "kind": "audio",
            "preferredPayloadType": 100,
            "clockRate": 48000,
            "channels": 2,
            "parameters": {
                "minptime": 10,
                "useinbandfec": 1
            },
            "rtcpFeedback": [
                {
                    "type": "transport-cc",
                    "parameter": ""
                }
            ]
        },
        {
            "mimeType": "video/VP9",
            "kind": "video",
            "preferredPayloadType": 101,
            "clockRate": 90000,
            "parameters": {
                "profile-id": 0
            },
            "rtcpFeedback": [
                {
                    "type": "goog-remb",
                    "parameter": ""
                },
                {
                    "type": "transport-cc",
                    "parameter": ""
                },
                {
                    "type": "ccm",
                    "parameter": "fir"
                },
                {
                    "type": "nack",
                    "parameter": ""
                },
                {
                    "type": "nack",
                    "parameter": "pli"
                }
            ]
        },
        {
            "mimeType": "video/rtx",
            "kind": "video",
            "preferredPayloadType": 102,
            "clockRate": 90000,
            "parameters": {
                "apt": 101
            },
            "rtcpFeedback": []
        },
        {
            "mimeType": "video/VP8",
            "kind": "video",
            "preferredPayloadType": 103,
            "clockRate": 90000,
            "parameters": {},
            "rtcpFeedback": [
                {
                    "type": "goog-remb",
                    "parameter": ""
                },
                {
                    "type": "transport-cc",
                    "parameter": ""
                },
                {
                    "type": "ccm",
                    "parameter": "fir"
                },
                {
                    "type": "nack",
                    "parameter": ""
                },
                {
                    "type": "nack",
                    "parameter": "pli"
                }
            ]
        },
        {
            "mimeType": "video/rtx",
            "kind": "video",
            "preferredPayloadType": 104,
            "clockRate": 90000,
            "parameters": {
                "apt": 103
            },
            "rtcpFeedback": []
        },
        {
            "mimeType": "video/H264",
            "kind": "video",
            "preferredPayloadType": 105,
            "clockRate": 90000,
            "parameters": {
                "level-asymmetry-allowed": 1,
                "packetization-mode": 1,
                "profile-level-id": "42e01f"
            },
            "rtcpFeedback": [
                {
                    "type": "goog-remb",
                    "parameter": ""
                },
                {
                    "type": "transport-cc",
                    "parameter": ""
                },
                {
                    "type": "ccm",
                    "parameter": "fir"
                },
                {
                    "type": "nack",
                    "parameter": ""
                },
                {
                    "type": "nack",
                    "parameter": "pli"
                }
            ]
        },
        {
            "mimeType": "video/rtx",
            "kind": "video",
            "preferredPayloadType": 106,
            "clockRate": 90000,
            "parameters": {
                "apt": 105
            },
            "rtcpFeedback": []
        },
        {
            "mimeType": "video/H264",
            "kind": "video",
            "preferredPayloadType": 107,
            "clockRate": 90000,
            "parameters": {
                "level-asymmetry-allowed": 1,
                "packetization-mode": 0,
                "profile-level-id": "42e01f"
            },
            "rtcpFeedback": [
                {
                    "type": "goog-remb",
                    "parameter": ""
                },
                {
                    "type": "transport-cc",
                    "parameter": ""
                },
                {
                    "type": "ccm",
                    "parameter": "fir"
                },
                {
                    "type": "nack",
                    "parameter": ""
                },
                {
                    "type": "nack",
                    "parameter": "pli"
                }
            ]
        },
        {
            "mimeType": "video/rtx",
            "kind": "video",
            "preferredPayloadType": 108,
            "clockRate": 90000,
            "parameters": {
                "apt": 107
            },
            "rtcpFeedback": []
        }
    ],
    "headerExtensions": [
        {
            "kind": "audio",
            "uri": "urn:ietf:params:rtp-hdrext:sdes:mid",
            "preferredId": 1,
            "preferredEncrypt": false,
            "direction": "sendrecv"
        },
        {
            "kind": "video",
            "uri": "urn:ietf:params:rtp-hdrext:sdes:mid",
            "preferredId": 1,
            "preferredEncrypt": false,
            "direction": "sendrecv"
        },
        {
            "kind": "audio",
            "uri": "http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time",
            "preferredId": 4,
            "preferredEncrypt": false,
            "direction": "sendrecv"
        },
        {
            "kind": "video",
            "uri": "http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time",
            "preferredId": 4,
            "preferredEncrypt": false,
            "direction": "sendrecv"
        },
        {
            "kind": "video",
            "uri": "http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01",
            "preferredId": 5,
            "preferredEncrypt": false,
            "direction": "sendrecv"
        },
        {
            "kind": "audio",
            "uri": "urn:ietf:params:rtp-hdrext:ssrc-audio-level",
            "preferredId": 10,
            "preferredEncrypt": false,
            "direction": "sendrecv"
        },
        {
            "kind": "video",
            "uri": "urn:3gpp:video-orientation",
            "preferredId": 11,
            "preferredEncrypt": false,
            "direction": "sendrecv"
        },
        {
            "kind": "video",
            "uri": "urn:ietf:params:rtp-hdrext:toffset",
            "preferredId": 12,
            "preferredEncrypt": false,
            "direction": "sendrecv"
        }
    ]
}

C++ client device.GetRtpCapabilities():

"rtpCapabilities": {
    "codecs": [
        {
            "channels": 2,
            "clockRate": 48000,
            "kind": "audio",
            "mimeType": "audio/opus",
            "parameters": {
                "minptime": 10,
                "useinbandfec": 1
            },
            "preferredPayloadType": 100,
            "rtcpFeedback": [
                {
                    "parameter": "",
                    "type": "transport-cc"
                }
            ]
        },
        {
            "clockRate": 90000,
            "kind": "video",
            "mimeType": "video/VP9",
            "parameters": {
                "profile-id": "0"
            },
            "preferredPayloadType": 101,
            "rtcpFeedback": [
                {
                    "parameter": "",
                    "type": "goog-remb"
                },
                {
                    "parameter": "",
                    "type": "transport-cc"
                },
                {
                    "parameter": "fir",
                    "type": "ccm"
                },
                {
                    "parameter": "",
                    "type": "nack"
                },
                {
                    "parameter": "pli",
                    "type": "nack"
                }
            ]
        },
        {
            "clockRate": 90000,
            "kind": "video",
            "mimeType": "video/rtx",
            "parameters": {
                "apt": 101
            },
            "preferredPayloadType": 102,
            "rtcpFeedback": []
        },
        {
            "clockRate": 90000,
            "kind": "video",
            "mimeType": "video/VP8",
            "parameters": {},
            "preferredPayloadType": 103,
            "rtcpFeedback": [
                {
                    "parameter": "",
                    "type": "goog-remb"
                },
                {
                    "parameter": "",
                    "type": "transport-cc"
                },
                {
                    "parameter": "fir",
                    "type": "ccm"
                },
                {
                    "parameter": "",
                    "type": "nack"
                },
                {
                    "parameter": "pli",
                    "type": "nack"
                }
            ]
        },
        {
            "clockRate": 90000,
            "kind": "video",
            "mimeType": "video/rtx",
            "parameters": {
                "apt": 103
            },
            "preferredPayloadType": 104,
            "rtcpFeedback": []
        }
    ],
    "headerExtensions": [
        {
            "direction": "sendrecv",
            "kind": "audio",
            "preferredEncrypt": false,
            "preferredId": 1,
            "uri": "urn:ietf:params:rtp-hdrext:sdes:mid"
        },
        {
            "direction": "sendrecv",
            "kind": "video",
            "preferredEncrypt": false,
            "preferredId": 1,
            "uri": "urn:ietf:params:rtp-hdrext:sdes:mid"
        },
        {
            "direction": "sendrecv",
            "kind": "audio",
            "preferredEncrypt": false,
            "preferredId": 4,
            "uri": "http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time"
        },
        {
            "direction": "sendrecv",
            "kind": "video",
            "preferredEncrypt": false,
            "preferredId": 4,
            "uri": "http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time"
        },
        {
            "direction": "sendrecv",
            "kind": "video",
            "preferredEncrypt": false,
            "preferredId": 5,
            "uri": "http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01"
        },
        {
            "direction": "sendrecv",
            "kind": "video",
            "preferredEncrypt": false,
            "preferredId": 6,
            "uri": "http://tools.ietf.org/html/draft-ietf-avtext-framemarking-07"
        },
        {
            "direction": "sendrecv",
            "kind": "audio",
            "preferredEncrypt": false,
            "preferredId": 10,
            "uri": "urn:ietf:params:rtp-hdrext:ssrc-audio-level"
        },
        {
            "direction": "sendrecv",
            "kind": "video",
            "preferredEncrypt": false,
            "preferredId": 11,
            "uri": "urn:3gpp:video-orientation"
        },
        {
            "direction": "sendrecv",
            "kind": "video",
            "preferredEncrypt": false,
            "preferredId": 12,
            "uri": "urn:ietf:params:rtp-hdrext:toffset"
        }
    ]
}
2

If mediasoup is complaining it means that something is different when you produce/consume with Chrome and with your C++ app. So let’s go to mediasoup.

Print the rtpParameters you pass to produce() in mediasoup for both Chrome and C++ app and also the rtpCapabilities you pass to consume(). There must be differences because mediasoup does not care whether the endpoint is Chrome or a C++ app. Perhaps some codec param is being converted to string during serialization or something like that.

3

Thanks for the reply! Here are the the rtpParameters passed into produce call (first Chrome, then C++ producer) and rtpCapabilities passed into canConsume call below.
The only difference in codecs I can spot is that the parameters.profile-id is a number in Chrome while in C++ case it is a string. Can this be the issue?

produce rtpParameters (Chrome)

{
  "codecs": [
    {
      "mimeType": "video/VP9",
      "payloadType": 98,
      "clockRate": 90000,
      "parameters": {
        "profile-id": 0
      },
      "rtcpFeedback": [
        {
          "type": "goog-remb",
          "parameter": ""
        },
        {
          "type": "transport-cc",
          "parameter": ""
        },
        {
          "type": "ccm",
          "parameter": "fir"
        },
        {
          "type": "nack",
          "parameter": ""
        },
        {
          "type": "nack",
          "parameter": "pli"
        }
      ]
    },
    {
      "mimeType": "video/rtx",
      "payloadType": 99,
      "clockRate": 90000,
      "parameters": {
        "apt": 98
      },
      "rtcpFeedback": []
    }
  ],
  "headerExtensions": [
    {
      "uri": "urn:ietf:params:rtp-hdrext:sdes:mid",
      "id": 4,
      "encrypt": false,
      "parameters": {}
    },
    {
      "uri": "urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id",
      "id": 5,
      "encrypt": false,
      "parameters": {}
    },
    {
      "uri": "urn:ietf:params:rtp-hdrext:sdes:repaired-rtp-stream-id",
      "id": 6,
      "encrypt": false,
      "parameters": {}
    },
    {
      "uri": "http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time",
      "id": 2,
      "encrypt": false,
      "parameters": {}
    },
    {
      "uri": "http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01",
      "id": 3,
      "encrypt": false,
      "parameters": {}
    },
    {
      "uri": "urn:3gpp:video-orientation",
      "id": 13,
      "encrypt": false,
      "parameters": {}
    },
    {
      "uri": "urn:ietf:params:rtp-hdrext:toffset",
      "id": 14,
      "encrypt": false,
      "parameters": {}
    }
  ],
  "encodings": [
    {
      "ssrc": 2111488076,
      "rtx": {
        "ssrc": 2063412997
      },
      "dtx": false
    }
  ],
  "rtcp": {
    "cname": "fDor0grO4ftck5wE",
    "reducedSize": true
  },
  "mid": "0"
}

produce rtpParameters (C++)

{
  "codecs": [
    {
      "clockRate": 90000,
      "mimeType": "video/VP9",
      "parameters": {
        "profile-id": "0"
      },
      "payloadType": 98,
      "rtcpFeedback": [
        {
          "parameter": "",
          "type": "goog-remb"
        },
        {
          "parameter": "",
          "type": "transport-cc"
        },
        {
          "parameter": "fir",
          "type": "ccm"
        },
        {
          "parameter": "",
          "type": "nack"
        },
        {
          "parameter": "pli",
          "type": "nack"
        }
      ]
    },
    {
      "clockRate": 90000,
      "mimeType": "video/rtx",
      "parameters": {
        "apt": 98
      },
      "payloadType": 99,
      "rtcpFeedback": []
    }
  ],
  "encodings": [
    {
      "active": true,
      "dtx": false,
      "maxBitrate": 500000,
      "networkPriority": 1,
      "rtx": {
        "ssrc": 4039943701
      },
      "ssrc": 1895638995
    }
  ],
  "headerExtensions": [
    {
      "encrypt": false,
      "id": 4,
      "parameters": {},
      "uri": "urn:ietf:params:rtp-hdrext:sdes:mid"
    },
    {
      "encrypt": false,
      "id": 5,
      "parameters": {},
      "uri": "urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id"
    },
    {
      "encrypt": false,
      "id": 6,
      "parameters": {},
      "uri": "urn:ietf:params:rtp-hdrext:sdes:repaired-rtp-stream-id"
    },
    {
      "encrypt": false,
      "id": 2,
      "parameters": {},
      "uri": "http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time"
    },
    {
      "encrypt": false,
      "id": 3,
      "parameters": {},
      "uri": "http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01"
    },
    {
      "encrypt": false,
      "id": 8,
      "parameters": {},
      "uri": "http://tools.ietf.org/html/draft-ietf-avtext-framemarking-07"
    },
    {
      "encrypt": false,
      "id": 13,
      "parameters": {},
      "uri": "urn:3gpp:video-orientation"
    },
    {
      "encrypt": false,
      "id": 14,
      "parameters": {},
      "uri": "urn:ietf:params:rtp-hdrext:toffset"
    }
  ],
  "mid": "0",
  "rtcp": {
    "cname": "c31e0de4",
    "reducedSize": true
  }
}

consume rtpCapabilities (Chrome)

{
  "codecs": [
    {
      "mimeType": "audio/opus",
      "kind": "audio",
      "preferredPayloadType": 100,
      "clockRate": 48000,
      "channels": 2,
      "parameters": {
        "minptime": 10,
        "useinbandfec": 1
      },
      "rtcpFeedback": [
        {
          "type": "transport-cc",
          "parameter": ""
        }
      ]
    },
    {
      "mimeType": "video/VP9",
      "kind": "video",
      "preferredPayloadType": 101,
      "clockRate": 90000,
      "parameters": {
        "profile-id": 0
      },
      "rtcpFeedback": [
        {
          "type": "goog-remb",
          "parameter": ""
        },
        {
          "type": "transport-cc",
          "parameter": ""
        },
        {
          "type": "ccm",
          "parameter": "fir"
        },
        {
          "type": "nack",
          "parameter": ""
        },
        {
          "type": "nack",
          "parameter": "pli"
        }
      ]
    },
    {
      "mimeType": "video/rtx",
      "kind": "video",
      "preferredPayloadType": 102,
      "clockRate": 90000,
      "parameters": {
        "apt": 101
      },
      "rtcpFeedback": []
    },
    {
      "mimeType": "video/VP8",
      "kind": "video",
      "preferredPayloadType": 103,
      "clockRate": 90000,
      "parameters": {},
      "rtcpFeedback": [
        {
          "type": "goog-remb",
          "parameter": ""
        },
        {
          "type": "transport-cc",
          "parameter": ""
        },
        {
          "type": "ccm",
          "parameter": "fir"
        },
        {
          "type": "nack",
          "parameter": ""
        },
        {
          "type": "nack",
          "parameter": "pli"
        }
      ]
    },
    {
      "mimeType": "video/rtx",
      "kind": "video",
      "preferredPayloadType": 104,
      "clockRate": 90000,
      "parameters": {
        "apt": 103
      },
      "rtcpFeedback": []
    },
    {
      "mimeType": "video/H264",
      "kind": "video",
      "preferredPayloadType": 105,
      "clockRate": 90000,
      "parameters": {
        "level-asymmetry-allowed": 1,
        "packetization-mode": 1,
        "profile-level-id": "42e01f"
      },
      "rtcpFeedback": [
        {
          "type": "goog-remb",
          "parameter": ""
        },
        {
          "type": "transport-cc",
          "parameter": ""
        },
        {
          "type": "ccm",
          "parameter": "fir"
        },
        {
          "type": "nack",
          "parameter": ""
        },
        {
          "type": "nack",
          "parameter": "pli"
        }
      ]
    },
    {
      "mimeType": "video/rtx",
      "kind": "video",
      "preferredPayloadType": 106,
      "clockRate": 90000,
      "parameters": {
        "apt": 105
      },
      "rtcpFeedback": []
    },
    {
      "mimeType": "video/H264",
      "kind": "video",
      "preferredPayloadType": 107,
      "clockRate": 90000,
      "parameters": {
        "level-asymmetry-allowed": 1,
        "packetization-mode": 0,
        "profile-level-id": "42e01f"
      },
      "rtcpFeedback": [
        {
          "type": "goog-remb",
          "parameter": ""
        },
        {
          "type": "transport-cc",
          "parameter": ""
        },
        {
          "type": "ccm",
          "parameter": "fir"
        },
        {
          "type": "nack",
          "parameter": ""
        },
        {
          "type": "nack",
          "parameter": "pli"
        }
      ]
    },
    {
      "mimeType": "video/rtx",
      "kind": "video",
      "preferredPayloadType": 108,
      "clockRate": 90000,
      "parameters": {
        "apt": 107
      },
      "rtcpFeedback": []
    }
  ],
  "headerExtensions": [
    {
      "kind": "audio",
      "uri": "urn:ietf:params:rtp-hdrext:sdes:mid",
      "preferredId": 1,
      "preferredEncrypt": false,
      "direction": "sendrecv"
    },
    {
      "kind": "video",
      "uri": "urn:ietf:params:rtp-hdrext:sdes:mid",
      "preferredId": 1,
      "preferredEncrypt": false,
      "direction": "sendrecv"
    },
    {
      "kind": "audio",
      "uri": "http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time",
      "preferredId": 4,
      "preferredEncrypt": false,
      "direction": "sendrecv"
    },
    {
      "kind": "video",
      "uri": "http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time",
      "preferredId": 4,
      "preferredEncrypt": false,
      "direction": "sendrecv"
    },
    {
      "kind": "video",
      "uri": "http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01",
      "preferredId": 5,
      "preferredEncrypt": false,
      "direction": "sendrecv"
    },
    {
      "kind": "audio",
      "uri": "urn:ietf:params:rtp-hdrext:ssrc-audio-level",
      "preferredId": 10,
      "preferredEncrypt": false,
      "direction": "sendrecv"
    },
    {
      "kind": "video",
      "uri": "urn:3gpp:video-orientation",
      "preferredId": 11,
      "preferredEncrypt": false,
      "direction": "sendrecv"
    },
    {
      "kind": "video",
      "uri": "urn:ietf:params:rtp-hdrext:toffset",
      "preferredId": 12,
      "preferredEncrypt": false,
      "direction": "sendrecv"
    }
  ]
}

consume rtpCapabilities (C++)

{
 "codecs": [
   {
     "channels": 2,
     "clockRate": 48000,
     "kind": "audio",
     "mimeType": "audio/opus",
     "parameters": {
       "minptime": 10,
       "useinbandfec": 1
     },
     "preferredPayloadType": 100,
     "rtcpFeedback": [
       {
         "parameter": "",
         "type": "transport-cc"
       }
     ]
   },
   {
     "clockRate": 90000,
     "kind": "video",
     "mimeType": "video/VP9",
     "parameters": {
       "profile-id": "0"
     },
     "preferredPayloadType": 101,
     "rtcpFeedback": [
       {
         "parameter": "",
         "type": "goog-remb"
       },
       {
         "parameter": "",
         "type": "transport-cc"
       },
       {
         "parameter": "fir",
         "type": "ccm"
       },
       {
         "parameter": "",
         "type": "nack"
       },
       {
         "parameter": "pli",
         "type": "nack"
       }
     ]
   },
   {
     "clockRate": 90000,
     "kind": "video",
     "mimeType": "video/rtx",
     "parameters": {
       "apt": 101
     },
     "preferredPayloadType": 102,
     "rtcpFeedback": []
   },
   {
     "clockRate": 90000,
     "kind": "video",
     "mimeType": "video/VP8",
     "parameters": {},
     "preferredPayloadType": 103,
     "rtcpFeedback": [
       {
         "parameter": "",
         "type": "goog-remb"
       },
       {
         "parameter": "",
         "type": "transport-cc"
       },
       {
         "parameter": "fir",
         "type": "ccm"
       },
       {
         "parameter": "",
         "type": "nack"
       },
       {
         "parameter": "pli",
         "type": "nack"
       }
     ]
   },
   {
     "clockRate": 90000,
     "kind": "video",
     "mimeType": "video/rtx",
     "parameters": {
       "apt": 103
     },
     "preferredPayloadType": 104,
     "rtcpFeedback": []
   }
 ],
 "headerExtensions": [
   {
     "direction": "sendrecv",
     "kind": "audio",
     "preferredEncrypt": false,
     "preferredId": 1,
     "uri": "urn:ietf:params:rtp-hdrext:sdes:mid"
   },
   {
     "direction": "sendrecv",
     "kind": "video",
     "preferredEncrypt": false,
     "preferredId": 1,
     "uri": "urn:ietf:params:rtp-hdrext:sdes:mid"
   },
   {
     "direction": "sendrecv",
     "kind": "audio",
     "preferredEncrypt": false,
     "preferredId": 4,
     "uri": "http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time"
   },
   {
     "direction": "sendrecv",
     "kind": "video",
     "preferredEncrypt": false,
     "preferredId": 4,
     "uri": "http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time"
   },
   {
     "direction": "sendrecv",
     "kind": "video",
     "preferredEncrypt": false,
     "preferredId": 5,
     "uri": "http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01"
   },
   {
     "direction": "sendrecv",
     "kind": "video",
     "preferredEncrypt": false,
     "preferredId": 6,
     "uri": "http://tools.ietf.org/html/draft-ietf-avtext-framemarking-07"
   },
   {
     "direction": "sendrecv",
     "kind": "audio",
     "preferredEncrypt": false,
     "preferredId": 10,
     "uri": "urn:ietf:params:rtp-hdrext:ssrc-audio-level"
   },
   {
     "direction": "sendrecv",
     "kind": "video",
     "preferredEncrypt": false,
     "preferredId": 11,
     "uri": "urn:3gpp:video-orientation"
   },
   {
     "direction": "sendrecv",
     "kind": "video",
     "preferredEncrypt": false,
     "preferredId": 12,
     "uri": "urn:ietf:params:rtp-hdrext:toffset"
   }
 ]
}
4

Absolutely. Please report issue in GH project of libmediasoupclient.

1 Like
5

Thanks! For tracking purposes here’s the issue link: