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共通失败与恢复：完整报文

约 514 字大约 2 分钟

2026-10-16

本页是场景流程的完整 JSON 序列，按图中编号查阅。示例中的分支互斥，不能顺序重放全部报文；实际 ID、截止、SDP、地址和密钥须由运行时取得。实施状态及字段定义仍以场景与命令页为准。

编号报文

M01 · sessionCreate

{
  "msgToken": "forbidden",
  "method": "sessionCreate",
  "params": {
    "purpose": "ipcLiveView",
    "transport": "webrtc",
    "tracks": [
      {
        "trackId": "v",
        "kind": "video",
        "sourceId": "front",
        "direction": "sendonly",
        "codec": "H264",
        "state": "requested"
      }
    ],
    "cameraId": "front"
  }
}

M02 · sessionCreated

{
  "msgToken": "forbidden",
  "method": "sessionCreated",
  "code": 403,
  "data": {
    "reason": "permissionDenied"
  }
}

M03 · mediaOffer

{
  "msgToken": "bad-offer",
  "method": "mediaOffer",
  "sessionId": "s11-session",
  "params": {
    "mediaRevision": 2,
    "webrtc": {
      "iceMode": "complete",
      "sdp": "<invalid SDP>"
    }
  }
}

M04 · mediaAnswer

{
  "msgToken": "bad-offer",
  "method": "mediaAnswer",
  "sessionId": "s11-session",
  "code": 502,
  "data": {
    "reason": "mediaNegotiationFailed"
  }
}

M05 · sessionError

{
  "msgToken": "failure-1",
  "method": "sessionError",
  "sessionId": "s11-session",
  "code": 502,
  "eventSeq": 1,
  "data": {
    "reason": "mediaNegotiationFailed",
    "retryable": false,
    "mediaRevision": 2
  }
}

M06 · sessionEnded

{
  "msgToken": "failure-3",
  "method": "sessionEnded",
  "sessionId": "s11-session",
  "data": {
    "state": "ended",
    "reason": "mediaFailed"
  },
  "eventSeq": 2
}

M07 · sessionEnded

{
  "msgToken": "failure-5",
  "method": "sessionEnded",
  "sessionId": "s11-session",
  "data": {
    "state": "ended",
    "reason": "networkTimeout"
  },
  "eventSeq": 3
}

M08 · audioStart

{
  "msgToken": "same-start",
  "method": "audioStart",
  "sessionId": "s11-session",
  "params": {
    "inputId": "same-input",
    "firstPacketSeq": 256
  }
}

M09 · requestAck

{
  "msgToken": "same-start",
  "method": "requestAck",
  "sessionId": "s11-session",
  "code": 200,
  "data": {
    "requestMethod": "audioStart",
    "result": {
      "inputId": "same-input"
    }
  }
}

M10 · audioStart

{
  "msgToken": "same-start",
  "method": "audioStart",
  "sessionId": "s11-session",
  "params": {
    "inputId": "same-input",
    "firstPacketSeq": 384
  }
}

M11 · requestAck

{
  "msgToken": "same-start",
  "method": "requestAck",
  "sessionId": "s11-session",
  "code": 200,
  "data": {
    "requestMethod": "audioStart",
    "result": {
      "inputId": "same-input"
    }
  }
}

M12 · mediaState

{
  "msgToken": "late",
  "method": "mediaState",
  "sessionId": "s11-session",
  "params": {
    "mediaRevision": 1,
    "state": "connected"
  }
}

M13 · requestAck

{
  "msgToken": "late",
  "method": "requestAck",
  "sessionId": "s11-session",
  "code": 409,
  "data": {
    "requestMethod": "mediaState",
    "reason": "sessionExpired"
  }
}

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2026/10/17 03:27
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