{
  "scope": "Encoded fixture structure, caption-region differences and decoded audio equality only; not transcription accuracy or desktop-editor verification",
  "files": [
    {
      "file": "subtitle-delivery-clean.mp4",
      "durationSeconds": 8.0,
      "frames": 192,
      "fps": "24/1",
      "width": 960,
      "height": 540,
      "hasAudio": true,
      "subtitleStreams": 0
    },
    {
      "file": "subtitle-delivery-burned.mp4",
      "durationSeconds": 8.0,
      "frames": 192,
      "fps": "24/1",
      "width": 960,
      "height": 540,
      "hasAudio": true,
      "subtitleStreams": 0
    }
  ],
  "captionRegionChecks": [
    {
      "frame": 0,
      "captionRegionMeanAbsoluteRGBDifference": 0.0
    },
    {
      "frame": 48,
      "captionRegionMeanAbsoluteRGBDifference": 30.837564824278214
    },
    {
      "frame": 120,
      "captionRegionMeanAbsoluteRGBDifference": 30.401491431568815
    }
  ],
  "decodedAudioIdentical": true,
  "decodedAudioSHA256": "10ddc7a44274d4fa55524694cdacfa40228a717b487ab45638d07759dd0738ea",
  "narration": "macOS Samantha system voice, original two-line script, utterances placed at 0.5 and 4 seconds",
  "captionIntervalsSeconds": [[0.5, 2.9], [4, 6.2]],
  "externalModelInference": false
}