{
  "timezone": "Asia/Kolkata",
  "sessions": [
    {
      "session_id": "GGN_20260618_S01",
      "capture_date": "2026-06-18",
      "timezone": "Asia/Kolkata",
      "collector_id": "WRK_846159",
      "clips_in_session": 1,
      "indoor_outdoor": "indoor",
      "lighting": "tubelight_cfl",
      "mount_type": "head_mounted_via_headband_egocentric",
      "task_id": "pack_shuttle_tube",
      "time_reference": "clip_start",
      "utc_available": true,
      "utc_note": "Wall-clock start approximated for robotics fusion (minute resolution, 12:00-17:00 IST window); not embedded in deliverable MP4. Clip-relative timestamps remain authoritative.",
      "clip_id": "sample_01_shuttle_tube_packaging",
      "video_file": "sample_01_shuttle_tube_packaging.mp4",
      "environment": "factory",
      "capture_device": "Samsung Galaxy S24",
      "duration_seconds": 359.99,
      "timestamps_csv": "annotations/timestamps/sample_01_shuttle_tube_packaging_timestamps.csv",
      "frame_count": 10800,
      "utc_precision": "minute_approximate",
      "capture_start_ist_approx": "2026-06-18T16:47:00+05:30",
      "capture_start_utc_approx": "2026-06-18T11:17:00Z"
    },
    {
      "session_id": "GGN_20260618_S02",
      "capture_date": "2026-06-18",
      "timezone": "Asia/Kolkata",
      "collector_id": "WRK_809884",
      "clips_in_session": 1,
      "indoor_outdoor": "indoor",
      "lighting": "mixed",
      "mount_type": "head_mounted_via_headband_egocentric",
      "task_id": "sew_garment",
      "time_reference": "clip_start",
      "utc_available": true,
      "utc_note": "Wall-clock start approximated for robotics fusion (minute resolution, 12:00-17:00 IST window); not embedded in deliverable MP4. Clip-relative timestamps remain authoritative.",
      "clip_id": "sample_02_industrial_sewing_machine",
      "video_file": "sample_02_industrial_sewing_machine.mp4",
      "environment": "factory",
      "capture_device": "Samsung Galaxy S24",
      "duration_seconds": 342.967,
      "timestamps_csv": "annotations/timestamps/sample_02_industrial_sewing_machine_timestamps.csv",
      "frame_count": 10289,
      "utc_precision": "minute_approximate",
      "capture_start_ist_approx": "2026-06-18T14:58:00+05:30",
      "capture_start_utc_approx": "2026-06-18T09:28:00Z"
    },
    {
      "session_id": "GGN_20260618_S03",
      "capture_date": "2026-06-18",
      "timezone": "Asia/Kolkata",
      "collector_id": "WRK_111569",
      "clips_in_session": 1,
      "indoor_outdoor": "indoor",
      "lighting": "tubelight_cfl",
      "mount_type": "head_mounted_via_headband_egocentric",
      "task_id": "heat_shrink_wrap",
      "time_reference": "clip_start",
      "utc_available": true,
      "utc_note": "Wall-clock start approximated for robotics fusion (minute resolution, 12:00-17:00 IST window); not embedded in deliverable MP4. Clip-relative timestamps remain authoritative.",
      "clip_id": "sample_03_heatgun_and_batching",
      "video_file": "sample_03_heatgun_and_batching.mp4",
      "environment": "factory",
      "capture_device": "Samsung Galaxy S24",
      "duration_seconds": 306.999,
      "timestamps_csv": "annotations/timestamps/sample_03_heatgun_and_batching_timestamps.csv",
      "frame_count": 9210,
      "utc_precision": "minute_approximate",
      "capture_start_ist_approx": "2026-06-18T12:09:00+05:30",
      "capture_start_utc_approx": "2026-06-18T06:39:00Z"
    },
    {
      "session_id": "GGN_20260618_S04",
      "capture_date": "2026-06-18",
      "timezone": "Asia/Kolkata",
      "collector_id": "WRK_862915",
      "clips_in_session": 1,
      "indoor_outdoor": "indoor",
      "lighting": "tubelight_cfl",
      "mount_type": "head_mounted_via_headband_egocentric",
      "task_id": "iron_and_pack",
      "time_reference": "clip_start",
      "utc_available": true,
      "utc_note": "Wall-clock start approximated for robotics fusion (minute resolution, 12:00-17:00 IST window); not embedded in deliverable MP4. Clip-relative timestamps remain authoritative.",
      "clip_id": "sample_04_garment_ironing_and_packing",
      "video_file": "sample_04_garment_ironing_and_packing.mp4",
      "environment": "factory",
      "capture_device": "Samsung Galaxy S24",
      "duration_seconds": 300.0,
      "timestamps_csv": "annotations/timestamps/sample_04_garment_ironing_and_packing_timestamps.csv",
      "frame_count": 17982,
      "utc_precision": "minute_approximate",
      "capture_start_ist_approx": "2026-06-18T16:26:00+05:30",
      "capture_start_utc_approx": "2026-06-18T10:56:00Z"
    },
    {
      "session_id": "GGN_20260620_S05",
      "capture_date": "2026-06-20",
      "timezone": "Asia/Kolkata",
      "collector_id": "WRK_930715",
      "clips_in_session": 1,
      "indoor_outdoor": "indoor",
      "lighting": "tubelight_cfl",
      "mount_type": "head_mounted_via_headband_egocentric",
      "task_id": "commercial_catering",
      "time_reference": "clip_start",
      "utc_available": true,
      "utc_note": "Wall-clock start approximated for robotics fusion (minute resolution, 12:00-17:00 IST window); not embedded in deliverable MP4. Clip-relative timestamps remain authoritative.",
      "clip_id": "sample_05_commercial_catering",
      "video_file": "sample_05_commercial_catering.mp4",
      "environment": "restaurant",
      "capture_device": "Apple iPhone 16 Pro Max",
      "duration_seconds": 371.955,
      "timestamps_csv": "annotations/timestamps/sample_05_commercial_catering_timestamps.csv",
      "frame_count": 11148,
      "utc_precision": "minute_approximate",
      "capture_start_ist_approx": "2026-06-20T12:11:00+05:30",
      "capture_start_utc_approx": "2026-06-20T06:41:00Z"
    },
    {
      "session_id": "GGN_20260620_S06",
      "capture_date": "2026-06-20",
      "timezone": "Asia/Kolkata",
      "collector_id": "WRK_207935",
      "clips_in_session": 1,
      "indoor_outdoor": "outdoor",
      "lighting": "natural",
      "mount_type": "head_mounted_via_headband_egocentric",
      "task_id": "cane_weaving",
      "time_reference": "clip_start",
      "utc_available": true,
      "utc_note": "Wall-clock start approximated for robotics fusion (minute resolution, 12:00-17:00 IST window); not embedded in deliverable MP4. Clip-relative timestamps remain authoritative.",
      "clip_id": "sample_06_cane_weaving",
      "video_file": "sample_06_cane_weaving.mp4",
      "environment": "roadside_shop",
      "capture_device": "Apple iPhone 16 Pro Max",
      "duration_seconds": 344.711,
      "timestamps_csv": "annotations/timestamps/sample_06_cane_weaving_timestamps.csv",
      "frame_count": 10331,
      "utc_precision": "minute_approximate",
      "capture_start_ist_approx": "2026-06-20T15:04:00+05:30",
      "capture_start_utc_approx": "2026-06-20T09:34:00Z"
    },
    {
      "session_id": "GGN_20260620_S07",
      "capture_date": "2026-06-20",
      "timezone": "Asia/Kolkata",
      "collector_id": "WRK_583769",
      "clips_in_session": 1,
      "indoor_outdoor": "indoor",
      "lighting": "tubelight_cfl",
      "mount_type": "head_mounted_via_headband_egocentric",
      "task_id": "car_detailing",
      "time_reference": "clip_start",
      "utc_available": true,
      "utc_note": "Wall-clock start approximated for robotics fusion (minute resolution, 12:00-17:00 IST window); not embedded in deliverable MP4. Clip-relative timestamps remain authoritative.",
      "clip_id": "sample_07_car_detailing",
      "video_file": "sample_07_car_detailing.mp4",
      "environment": "car_showroom",
      "capture_device": "Samsung Galaxy S24",
      "duration_seconds": 274.8,
      "timestamps_csv": "annotations/timestamps/sample_07_car_detailing_timestamps.csv",
      "frame_count": 8244,
      "utc_precision": "minute_approximate",
      "capture_start_ist_approx": "2026-06-20T15:14:00+05:30",
      "capture_start_utc_approx": "2026-06-20T09:44:00Z"
    },
    {
      "session_id": "GGN_20260620_S08",
      "capture_date": "2026-06-20",
      "timezone": "Asia/Kolkata",
      "collector_id": "WRK_851183",
      "clips_in_session": 1,
      "indoor_outdoor": "outdoor",
      "lighting": "natural",
      "mount_type": "head_mounted_via_headband_egocentric",
      "task_id": "primer_and_painting",
      "time_reference": "clip_start",
      "utc_available": true,
      "utc_note": "Wall-clock start approximated for robotics fusion (minute resolution, 12:00-17:00 IST window); not embedded in deliverable MP4. Clip-relative timestamps remain authoritative.",
      "clip_id": "sample_08_primer_and_painting",
      "video_file": "sample_08_primer_and_painting.mp4",
      "environment": "repair_shop",
      "capture_device": "Samsung Galaxy S24",
      "duration_seconds": 300.033,
      "timestamps_csv": "annotations/timestamps/sample_08_primer_and_painting_timestamps.csv",
      "frame_count": 9001,
      "utc_precision": "minute_approximate",
      "capture_start_ist_approx": "2026-06-20T16:00:00+05:30",
      "capture_start_utc_approx": "2026-06-20T10:30:00Z"
    },
    {
      "session_id": "GGN_20260620_S09",
      "capture_date": "2026-06-20",
      "timezone": "Asia/Kolkata",
      "collector_id": "WRK_290669",
      "clips_in_session": 1,
      "indoor_outdoor": "outdoor",
      "lighting": "natural",
      "mount_type": "head_mounted_via_headband_egocentric",
      "task_id": "denting_and_filing",
      "time_reference": "clip_start",
      "utc_available": true,
      "utc_note": "Wall-clock start approximated for robotics fusion (minute resolution, 12:00-17:00 IST window); not embedded in deliverable MP4. Clip-relative timestamps remain authoritative.",
      "clip_id": "sample_09_denting_and_filing",
      "video_file": "sample_09_denting_and_filing.mp4",
      "environment": "roadside_repair_shop",
      "capture_device": "Samsung Galaxy S24",
      "duration_seconds": 300.491,
      "timestamps_csv": "annotations/timestamps/sample_09_denting_and_filing_timestamps.csv",
      "frame_count": 9015,
      "utc_precision": "minute_approximate",
      "capture_start_ist_approx": "2026-06-20T15:30:00+05:30",
      "capture_start_utc_approx": "2026-06-20T10:00:00Z"
    }
  ]
}