{
  "name": "custom-director-layout",
  "sources": [
    {
      "name": "room_src",
      "type": "livekit",
      "config": {
        "serverUrl": "wss://your-project.livekit.cloud",
        "token": "eyJ..."
      }
    }
  ],
  "nodes": [
    {
      "name": "mix_video",
      "type": "video_mixer",
      "inputs": [
        "room_src"
      ],
      "config": {
        "canvas": {
          "width": 1920,
          "height": 1080,
          "backgroundColor": "#000000",
          "coordinateSystem": "ratio"
        },
        "layout": {
          "mode": "custom",
          "custom": {
            "regions": [
              {
                "name": "speaker",
                "source": {
                  "index": 0
                },
                "width": 0.7,
                "height": 1,
                "fit": "cover"
              },
              {
                "name": "thumb_1",
                "source": {
                  "index": 0
                },
                "offsetX": 0.72,
                "width": 0.28,
                "height": 0.33,
                "style": {
                  "borderRadius": 8
                }
              },
              {
                "name": "thumb_2",
                "source": {
                  "index": 1
                },
                "offsetX": 0.72,
                "offsetY": 0.34,
                "width": 0.28,
                "height": 0.33,
                "style": {
                  "borderRadius": 8
                }
              },
              {
                "name": "thumb_3",
                "source": {
                  "index": 2
                },
                "offsetX": 0.72,
                "offsetY": 0.67,
                "width": 0.28,
                "height": 0.33,
                "style": {
                  "borderRadius": 8
                }
              },
              {
                "name": "logo",
                "source": {
                  "trackName": "logo-overlay"
                },
                "offsetX": 0.01,
                "offsetY": 0.02,
                "width": 0.06,
                "height": 0.04,
                "zIndex": 100,
                "fit": "contain"
              }
            ]
          }
        }
      }
    },
    {
      "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/director-key"
        ]
      }
    }
  ]
}