{
  "version": 2,
  "output": { "width": 1920, "height": 1080, "fps": 30 },
  "sources": [],
  "tracks": [
    {
      "id": "v-shape",
      "lane": "visual",
      "items": [
        {
          "id": "shape-1",
          "at": 0,
          "duration": 90,
          "source": { "kind": "shape", "shape": "star" }
        }
      ]
    }
  ]
}