{
  "name": "livekit-mix",
  "sources": [
    {
      "name": "room_src",
      "type": "livekit",
      "config": {
        "serverUrl": "wss://your-project.livekit.cloud",
        "token": "eyJ...",
        "select": { "mediaType": "both" }
      }
    }
  ],
  "nodes": [
    {
      "name": "mix_video",
      "type": "video_mixer",
      "inputs": ["room_src"],
      "config": {
        "canvas": { "width": 1280, "height": 720, "bgColor": "#1a1a2e" },
        "layout": {
          "mode": "grid",
          "common": { "padding": 8, "gap": 4, "borderRadius": 8, "defaultFit": "cover" },
          "grid": { "maxColumns": 3, "maxRows": 3, "sortBy": "joinedAt" }
        }
      }
    },
    {
      "name": "mix_audio",
      "type": "audio_mixer",
      "inputs": ["room_src"],
      "config": {}
    }
  ],
  "sinks": [
    {
      "name": "rtmp_out",
      "type": "rtmp_push",
      "inputs": ["mix_video", "mix_audio"],
      "config": {
        "urls": ["rtmp://live.example.com/app/stream-key"],
        "encoding": { "videoCodec": "h264", "videoBitrateBps": 2500000 }
      }
    }
  ],
  "policies": { "idleTimeoutSec": 120 }
}