{
  "capture": "P6C2",
  "subject": "P6",
  "session": "C2",
  "role": "cross_reenact_driving",
  "n_cams": 32,
  "n_rigs_in_calibration": 32,
  "video": {
    "width": 4096,
    "height": 1500,
    "n_frames": 175,
    "fps": 22.0,
    "codec": "h264",
    "pix_fmt": "yuv444p",
    "layout": "side-by-side: LEFT half = RGB, RIGHT half = alpha matte",
    "rgb_width": 2048
  },
  "video_bytes": 325781755,
  "frame_convention": {
    "offset_d": 0,
    "rule": "video frame index == smplx frame index == GT frame index (d=0)",
    "smplx_frame": "0-based frame id, stored in smplx.npz['frames']",
    "video_frame": "the same number, 0-based index into camNN.mp4",
    "measured": "d is measured per capture by verify_alignment.py, not assumed"
  },
  "camera_convention": {
    "K": "[[fx,0,cx],[0,fy,cy],[0,0,1]] from rigs[i].cameras[0]",
    "R_w2c": "R @ diag(1,-1,-1)",
    "t_w2c": "-R @ c",
    "note": "cameras.json world is Y-down; the world_flip puts the fit in the same Y-up world as the DEGAS GT"
  },
  "n_frames": 175,
  "frame_range": [
    0,
    174
  ],
  "smplx_kwargs": {
    "model_type": "smplx",
    "gender": "neutral",
    "use_pca": false,
    "num_betas": 300,
    "num_expression_coeffs": 100,
    "use_face_contour": true,
    "flat_hand_mean": false,
    "create_global_orient": false,
    "create_body_pose": false,
    "create_betas": false,
    "create_left_hand_pose": false,
    "create_right_hand_pose": false,
    "create_jaw_pose": false,
    "create_leye_pose": false,
    "create_reye_pose": false,
    "create_expression": false,
    "create_transl": false
  }
}