{
  "meta_version": "1.0",
  "name": "2026-07-06-15-29-09-PA9410MGL4110500G",
  "version": "1.4.1",
  "app_version": "1.4.1",
  "debug": false,
  "build_type": "release",
  "debug_version": "",
  "collection_date": "2026-07-06T15:29:09",
  "device_type": "PICO 4 Ultra",
  "device_sn": "PA9410MGL4110500G",
  "video": {
    "file_name": "CameraRecord_2026-07-06-15-29-09.mp4",
    "width": 4096,
    "height": 1536,
    "fps": 24.999116,
    "recording_api": "pxrcapture_rawfisheye_sbs_hevc",
    "duration_sec": 59.682111
  },
  "tracking": {
    "file_name": "trackingData_2026-07-06-15-29-09.txt",
    "timebase": "timeStampNs_wall_ns_and_row_predictTime_CLOCK_MONOTONIC_us",
    "timestamp_semantics": {
      "timeStampNs": "App-side row write wall-clock timestamp in Unix nanoseconds.",
      "predictTime": "Row-level PXR_Enterprise.GetPredictedDisplayTime timestamp in CLOCK_MONOTONIC microseconds. Use it for video/tracking alignment; do not treat it as a unique source sample timestamp for every joint.",
      "hand": "Current trackingData has no independent hand source timestamp. Hand joints are attached to the row-level predictTime.",
      "body": "Body.joints[].t is the SDK localPose timestamp when the SDK provides a non-zero value. bodyTracking.displayTime is recorded after GetBodyTrackingData returns.",
      "sample_rate_note": "trackingData row cadence can be higher than the real Hand/Body source sample update cadence."
    }
  },
  "command_args": {
    "task_id": "283",
    "task_name": "A033 居家数采",
    "task_description": "A033 居家数采"
  },
  "recording_sync": {
    "recording_api": "pxrcapture_rawfisheye_sbs_hevc",
    "mvhevc": false,
    "output_width": 4096,
    "output_height": 1536,
    "fps": 30,
    "video_start_boot_ns": 873239874249,
    "video_start_mono_ns": 873239885811,
    "video_start_wall_ns": 1783322951865000000,
    "tracking_start_predict_time_us": 873280517.004,
    "tracking_start_wall_ns": 1783322951884822000,
    "video_pose_timebase": "relative_pts_sec",
    "tracking_timebase": "row_predictTime_CLOCK_MONOTONIC_us",
    "tracking_timestamp_semantics": "predictTime is a row-level alignment timestamp, not a guaranteed unique source sample timestamp for every joint.",
    "alignment_method": "metadata_clock_anchor",
    "optional_refinement": "spatialmp4_head_pose_xcorr",
    "clock_note": "SpatialMP4 video/pose timestamps are RELATIVE PTS seconds (start at 0). Default offline alignment maps video PTS 0 to videoStartMonoNs; optional refinement can cross-correlate the embedded head-pose track against trackingData 'Head' pose when spatialmp4 tooling is available. trackingData.predictTime is row-level mono us and shares CLOCK_MONOTONIC with videoStartMonoNs; videoStartWallNs is UTC."
  },
  "video_info": {
    "fps": 24.999116,
    "frame_count": 1492,
    "width": 4096,
    "height": 1536,
    "duration_sec": 59.682111
  },
  "tracking_info": {
    "profile_fps": 73.8,
    "profile_total_frames": 5364,
    "profile_duration_sec": 60.4
  },
  "movement_summary": {
    "moving_frame_ratio": 0.0,
    "cumulative_travel_distance_m": 0.901,
    "max_movement_range_m": 0.676,
    "net_displacement_m": 0.48,
    "cumulative_waist_rotation_deg": 311.53
  },
  "valid_data": [
    {
      "start_timestamp": "00:00:04.787",
      "end_timestamp": "00:00:22.606",
      "start_sec": 4.787,
      "end_sec": 22.606,
      "duration_sec": 17.819,
      "reason": "双手在去畸变视野内连续可见"
    },
    {
      "start_timestamp": "00:00:28.272",
      "end_timestamp": "00:00:43.939",
      "start_sec": 28.272,
      "end_sec": 43.939,
      "duration_sec": 15.667,
      "reason": "双手在去畸变视野内连续可见"
    },
    {
      "start_timestamp": "00:00:44.521",
      "end_timestamp": "00:00:59.682",
      "start_sec": 44.521,
      "end_sec": 59.682,
      "duration_sec": 15.161,
      "reason": "双手在去畸变视野内连续可见"
    }
  ],
  "quality": {
    "valid_duration_sec": 48.647,
    "valid_ratio": 0.8151,
    "best_clip_count": 3,
    "level": "usable",
    "notes": "基于hand_visible基础属性自动生成，客户交付前建议结合annotation复核动作语义。"
  },
  "delivery_processing": {
    "generated_at": "2026-07-06T14:06:03.196164+00:00",
    "source_profile": "all_profiles.json",
    "source_tracking_raw_preserved": true,
    "best_clips_source": "best_clips.json"
  }
}