{
  "schemaVersion": 1,
  "title": "AI whiteboard explainer: what makes a circle?",
  "language": "en",
  "createdAt": "2026-11-10T17:24:19.553Z",
  "source": "Original unchanged Donatello production export",
  "funding": "Production public API using an isolated editorial test account and promotional test credits. Normal credit-funded operations; no purchase, customer media or customer balance used. This is not a Relax run. Total recorded variable provider cost for both demos, including rejected attempts, is $0.140063. Fixed hosting and subscriptions are excluded; this is not a future price quote.",
  "scope": "A short, manually reviewed credit-funded example, not an unattended quality benchmark or a test of Relax eligibility, waiting times or 20-minute duration. Drawings can use reusable resources. Narration is synthetic; subtitle timing is approximate. Results vary and other topics may need corrections.",
  "attempts": {
    "rejectedExports": 1,
    "reason": "Initial radius/diameter narration produced an incorrect radio-receiver illustration. The first export was rejected. The script was simplified to circle, irregular outline and radius; resources were explicitly selected and the scenes regenerated.",
    "reviewedScript": "A circle is a round outline with no corners. Every point on that outline is the same distance from the center.\n\nAn uneven outline is different. Some parts bend farther outward and others curve inward, so it is not a perfect circle.\n\nThe straight segment from the center to the edge is called the radius. It connects the center to one point on the circle.\n\nFollow the outline back to where you started. A circle is closed, round, and has no corners.",
    "visualGuidance": [
      {
        "keep": [
          "donatello-vector-circle"
        ],
        "mode": "preserve",
        "note": "Show this exact geometric outline only, centered on white. No radio receiver or person."
      },
      {
        "keep": [
          "donatello-vector-imperfect-circle"
        ],
        "mode": "preserve",
        "note": "Show this exact geometric outline only, centered on white. No radio receiver or person."
      },
      {
        "keep": [
          "donatello-vector-radius"
        ],
        "mode": "preserve",
        "note": "Show this exact geometric outline only, centered on white. No radio receiver or person."
      },
      {
        "keep": [
          "donatello-vector-circle"
        ],
        "mode": "preserve",
        "note": "Show this exact geometric outline only, centered on white. No radio receiver or person."
      }
    ]
  },
  "settings": [
    {
      "label": "Workflow",
      "value": "Original script → editorial review → selected drawings → new narration → Whiteboard MP4"
    },
    {
      "label": "Drawing",
      "value": "Native Whiteboard renderer; progressive reveal with drawing hand, no separate Fast or Quality clips"
    },
    {
      "label": "Scenes",
      "value": "4"
    },
    {
      "label": "Voice",
      "value": "Graham Bennett · English"
    },
    {
      "label": "Subtitles",
      "value": "Classic · 44 px setting · bottom · additional adjustable VTT track"
    },
    {
      "label": "Music",
      "value": "Disabled to keep the explanation clear"
    },
    {
      "label": "Revisions",
      "value": "One complete first export rejected; all four scenes regenerated after script and visual-direction review"
    }
  ],
  "checks": {
    "fullDecode": true,
    "audioLevels": [
      "mean_volume: -22.1 dB",
      "max_volume: -3.4 dB"
    ],
    "videoCodec": "h264",
    "audioCodec": "aac",
    "durationSeconds": 30.068,
    "byteSize": 1137119,
    "sha256": "5ae9469d7ac1fdfaf5fcb7e1f0bf3325dc435a3b81b5212421cf77d5edbb8367"
  },
  "output": {
    "url": "/gallery/whiteboard-20261110/circle.mp4",
    "mimeType": "video/mp4",
    "mediaKind": "video",
    "byteSize": 1137119,
    "sha256": "5ae9469d7ac1fdfaf5fcb7e1f0bf3325dc435a3b81b5212421cf77d5edbb8367",
    "durationSeconds": 30.068,
    "width": 1280,
    "height": 720,
    "posterUrl": "/gallery/whiteboard-20261110/circle-poster.jpg",
    "captions": [
      {
        "url": "/gallery/whiteboard-20261110/circle.vtt",
        "language": "en",
        "label": "English narration"
      }
    ]
  }
}