2025-10-13T23:09:50 - INFO: DataPrep 0.13.4
2025-10-13T23:09:50 - INFO: Prepared data will be output to /working/9967ce0f-0a86-4abe-af09-182f372caf85/processing/data
2025-10-13T23:09:50 - INFO: ignore-cam-epochs flag enabled in flags file
2025-10-13T23:09:50 - deployment - INFO: Detected P3D version: P3D_2
2025-10-13T23:09:50 - INFO: Preparing payout data...
2025-10-13T23:09:50 - INFO: Interpreting counter as imperial
2025-10-13T23:09:50 - INFO: Prepared payout data in 0.0240 s
2025-10-13T23:09:50 - INFO: Preparing video data...

2025-10-13T23:09:50 - INFO: Processing camera 0...
2025-10-13T23:09:50 - INFO: Extracting frames from /working/9967ce0f-0a86-4abe-af09-182f372caf85/cameras/20250915T082227Z_front_cam0.mkv at 10.00 FPS
2025-10-13T23:10:25 - INFO: Processed camera 0 in 34.7055 s
2025-10-13T23:10:25 - INFO: Extracted 9321 frames for camera 0
2025-10-13T23:10:25 - INFO: Duplicating 0 zero-frames for camera 0 (good)

2025-10-13T23:10:25 - INFO: Processing camera 1...
2025-10-13T23:10:25 - INFO: Extracting frames from /working/9967ce0f-0a86-4abe-af09-182f372caf85/cameras/20250915T082227Z_top_cam1.mkv at 10.00 FPS
2025-10-13T23:11:02 - INFO: Processed camera 1 in 37.4319 s
2025-10-13T23:11:02 - INFO: Extracted 9322 frames for camera 1
2025-10-13T23:11:02 - INFO: Duplicating 0 zero-frames for camera 1 (good)

2025-10-13T23:11:02 - INFO: Processing camera 2...
2025-10-13T23:11:02 - INFO: Extracting frames from /working/9967ce0f-0a86-4abe-af09-182f372caf85/cameras/20250915T082227Z_left_cam2.mkv at 10.00 FPS
2025-10-13T23:11:36 - INFO: Processed camera 2 in 33.9543 s
2025-10-13T23:11:36 - INFO: Extracted 9311 frames for camera 2
2025-10-13T23:11:36 - INFO: Duplicating 0 zero-frames for camera 2 (good)

2025-10-13T23:11:36 - INFO: Processing camera 3...
2025-10-13T23:11:36 - INFO: Extracting frames from /working/9967ce0f-0a86-4abe-af09-182f372caf85/cameras/20250915T082227Z_right_cam3.mkv at 10.00 FPS
2025-10-13T23:12:10 - INFO: Processed camera 3 in 34.1358 s
2025-10-13T23:12:10 - INFO: Extracted 9303 frames for camera 3
2025-10-13T23:12:10 - INFO: Duplicating 0 zero-frames for camera 3 (good)

2025-10-13T23:12:10 - INFO: Prepared video data in 0:02:20.330141
2025-10-13T23:12:10 - INFO: Preparing video tracks...
2025-10-13T23:12:10 - INFO: Timesync camera offsets (ns) before generation are [0, 0, 0, 0]
2025-10-13T23:12:10 - WARNING: Ignoring non-primary camera epochs
2025-10-13T23:12:10 - ERROR: mkv - No creation time found
Traceback (most recent call last):
  File "/app/src/dataprep/__main__.py", line 187, in main
    dataprep.prepare.prepare(
  File "/app/src/dataprep/prepare.py", line 268, in prepare
    image_gen.generate_track(
  File "/app/src/dataprep/mkv.py", line 295, in generate_track
    first_epoch = get_creation_time_from_metadata(videos[0].path)
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/src/dataprep/mkv.py", line 69, in get_creation_time_from_metadata
    raise ValueError("No creation time found in metadata")
ValueError: No creation time found in metadata