{
  "captured_at": "20260922T183200Z",
  "feature": "uboot-splash-first-trial",
  "description": "Warm reboot initiated over serial, countdown interrupted, panel held at U-Boot prompt before any Linux load. Raw camera orientation; see timestamped serial transcript.",
  "capture_source": {
    "device": "/dev/video0",
    "input_format": "mjpeg",
    "video_size": "1920x1080",
    "framerate": 30
  },
  "interaction_provenance": "injected",
  "provenance_note": "Operator-declared metadata does not prove that footage shows a real touch.",
  "artifact": {
    "path": "docs/evidence/splash-trial/20260922T183200Z-uboot-splash-first-trial.mp4",
    "kind": "mp4",
    "duration_seconds": 40.0,
    "presentation_rotation": 0
  },
  "ffmpeg_command": [
    "ffmpeg",
    "-hide_banner",
    "-loglevel",
    "warning",
    "-f",
    "v4l2",
    "-input_format",
    "mjpeg",
    "-video_size",
    "1920x1080",
    "-framerate",
    "30",
    "-i",
    "/dev/video0",
    "-vf",
    "scale=out_range=tv",
    "-t",
    "40.0",
    "-an",
    "-c:v",
    "libx264",
    "-pix_fmt",
    "yuv420p",
    "-color_range",
    "tv",
    "-preset",
    "veryfast",
    "-crf",
    "23",
    "-threads",
    "2",
    "-movflags",
    "+faststart",
    "-y",
    "docs/evidence/splash-trial/20260922T183200Z-uboot-splash-first-trial.mp4"
  ],
  "dry_run": false
}