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FastvideoWorldModel-MC

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The dataset viewer is not available for this subset.
Cannot get the split names for the config 'default' of the dataset.
Exception:    SplitsNotFoundError
Message:      The split names could not be parsed from the dataset config.
Traceback:    Traceback (most recent call last):
                File "/usr/local/lib/python3.12/site-packages/datasets/inspect.py", line 286, in get_dataset_config_info
                  for split_generator in builder._split_generators(
                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/packaged_modules/webdataset/webdataset.py", line 80, in _split_generators
                  first_examples = list(islice(pipeline, self.NUM_EXAMPLES_FOR_FEATURES_INFERENCE))
                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/packaged_modules/webdataset/webdataset.py", line 33, in _get_pipeline_from_tar
                  for filename, f in tar_iterator:
                                     ^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/utils/track.py", line 49, in __iter__
                  for x in self.generator(*self.args):
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/utils/file_utils.py", line 1380, in _iter_from_urlpath
                  yield from cls._iter_tar(f)
                File "/usr/local/lib/python3.12/site-packages/datasets/utils/file_utils.py", line 1331, in _iter_tar
                  stream = tarfile.open(fileobj=f, mode="r|*")
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/tarfile.py", line 1886, in open
                  t = cls(name, filemode, stream, **kwargs)
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/tarfile.py", line 1762, in __init__
                  self.firstmember = self.next()
                                     ^^^^^^^^^^^
                File "/usr/local/lib/python3.12/tarfile.py", line 2750, in next
                  raise ReadError(str(e)) from None
              tarfile.ReadError: bad checksum
              
              The above exception was the direct cause of the following exception:
              
              Traceback (most recent call last):
                File "/src/services/worker/src/worker/job_runners/config/split_names.py", line 65, in compute_split_names_from_streaming_response
                  for split in get_dataset_split_names(
                               ^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/inspect.py", line 340, in get_dataset_split_names
                  info = get_dataset_config_info(
                         ^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/inspect.py", line 291, in get_dataset_config_info
                  raise SplitsNotFoundError("The split names could not be parsed from the dataset config.") from err
              datasets.inspect.SplitsNotFoundError: The split names could not be parsed from the dataset config.

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FastvideoWorldModel-MC

This dataset contains short Minecraft (MineDojo) episodes. Each episode is a folder with a video and optional JSON action annotations.

File layout 

<dataset_root>/
  episode_<timestamp_utc>_w<worker_id>_<episode_index>_<run_name>/
    manifest.json
    video.mp4
    mg/
      mg_actions.json
    data.npz            # optional (advanced users)

video.mp4

  • H.264 (libx264)
  • FPS and resolution are recorded in manifest.json (fps, image_size_hw where image_size_hw = [H, W])
  • The video has 96 frames

mg/mg_actions.json

Per-frame action annotations (one entry per timestep).

Format:

  • Top-level: JSON object (dict)
  • Keys: "0" ... "T-1" (string timestep)
  • Value per timestep:
    • action: List[int] (raw MineDojo MultiDiscrete action vector)
    • move_action: str in { "", "W", "A", "S", "D", "WA", "WD", "SA", "SD" }
    • view_action: str in { "", "up", "down", "left", "right", "up_left", "up_right", "down_left", "down_right" }

Notes:

  • view_action is derived from the per-frame yaw/pitch delta.
  • Convention: dyaw > 0 => right; dpitch > 0 => down (common Minecraft convention).

Advanced (Pro): data.npz (optional)

Some episodes also include data.npz (created with numpy.savez_compressed). It contains per-frame aligned numpy arrays.

Keys (all aligned to the video frames; typically T = 96):

  • actions: int64, shape (T, D)
    • raw MineDojo MultiDiscrete action vector per frame
    • D matches len(manifest["action_nvec"])
  • positions: float32 (sometimes float64), shape (T, 3)
    • Minecraft world position (x, y, z)
  • yaws: float32 (sometimes float64), shape (T,)
    • camera yaw in degrees
  • pitches: float32 (sometimes float64), shape (T,)
    • camera pitch in degrees

If you only need video + mg_actions.json, you can ignore data.npz.

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