{
  "captured_at": "20260922T172430Z",
  "feature": "portrait-image-startup",
  "description": "Automatic startup after direct-readback-verified portrait shell image flash. Serial reset; no UI input. USB cables attached.",
  "capture_source": {
    "device": "/dev/video0",
    "input_format": "mjpeg",
    "video_size": "1920x1080",
    "framerate": 30
  },
  "interaction_provenance": "unknown",
  "provenance_note": "Operator-declared metadata does not prove that footage shows a real touch.",
  "artifact": {
    "path": "docs/evidence/shell-features/startup-portrait/20260922T172430Z-portrait-image-startup.mp4",
    "kind": "mp4",
    "duration_seconds": 150.0,
    "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",
    "150.0",
    "-an",
    "-c:v",
    "libx264",
    "-pix_fmt",
    "yuv420p",
    "-color_range",
    "tv",
    "-preset",
    "veryfast",
    "-crf",
    "23",
    "-threads",
    "2",
    "-movflags",
    "+faststart",
    "-y",
    "docs/evidence/shell-features/startup-portrait/20260922T172430Z-portrait-image-startup.mp4"
  ],
  "dry_run": false,
  "site_assets": {
    "video": "demo.mp4",
    "screenshot": "screen.png"
  },
  "presentation_copy": {
    "path": "demo.mp4",
    "rotation_degrees": 180,
    "source_seconds": [
      0,
      110
    ],
    "original_duration_seconds": 150,
    "encoding": "H264/yuv420p, faststart",
    "note": "Original timestamped camera file retained."
  }
}