{
  "schemaVersion": 2,
  "file": "MP4",
  "video": {"width": 1920, "height": 1080, "aspectRatio": "16:9", "codec": "h264", "pixelFormat": "yuv420p", "fps": 30},
  "audio": {"required": true, "codec": "aac", "sampleRate": 48000, "channels": 2},
  "durationSeconds": {"sameAs": "sum(steps.durationSeconds)", "tolerance": 0.12, "minimum": 12, "maximum": 240.12},
  "captions": "Burned in by the official compositor from each narrated step's timed caption phrases.",
  "evidence": ["<output>.receipt.json", "quality-report.json", "quality-report-contact-sheet.jpg", "sha256"],
  "providerCalls": 0
}