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Cannot load the dataset split (in streaming mode) to extract the first rows.
Error code:   StreamingRowsError
Exception:    CastError
Message:      Couldn't cast
format: string
oracle_commit: string
artifacts: list<item: struct<path: string, media_type: string, byte_length: int64>>
  child 0, item: struct<path: string, media_type: string, byte_length: int64>
      child 0, path: string
      child 1, media_type: string
      child 2, byte_length: int64
taskSpecHash: string
captureMetadata: struct<schema: string, version: int64, camera: struct<selection: struct<availability: string, value: (... 756 chars omitted)
  child 0, schema: string
  child 1, version: int64
  child 2, camera: struct<selection: struct<availability: string, value: struct<label: string, side: string>>, width: s (... 192 chars omitted)
      child 0, selection: struct<availability: string, value: struct<label: string, side: string>>
          child 0, availability: string
          child 1, value: struct<label: string, side: string>
              child 0, label: string
              child 1, side: string
      child 1, width: struct<availability: string, value: int64>
          child 0, availability: string
          child 1, value: int64
      child 2, height: struct<availability: string, value: int64>
          child 0, availability: string
          child 1, value: int64
      child 3, frameRate: struct<availability: string, value: int64>
          child 0, availability: string
          child 1, value: int64
      child 4, calibration: struct<availability: string>
          child 0, availability: string
  child 3, device: struct<headsetModel: struct<availability
...
    child 0, item: string
  child 6, sourceRevision: string
  child 7, operationId: string
segments: list<item: struct<id: string, taskId: string, taskLabel: string, taskDescription: string, repetition (... 350 chars omitted)
  child 0, item: struct<id: string, taskId: string, taskLabel: string, taskDescription: string, repetition: int64, ta (... 338 chars omitted)
      child 0, id: string
      child 1, taskId: string
      child 2, taskLabel: string
      child 3, taskDescription: string
      child 4, repetition: int64
      child 5, take: int64
      child 6, startedAt: string
      child 7, outcome: string
      child 8, accepted: bool
      child 9, annotations: list<item: struct<id: string, action: string, actor: string, timestampMs: int64, sourceTimestampUs:  (... 7 chars omitted)
          child 0, item: struct<id: string, action: string, actor: string, timestampMs: int64, sourceTimestampUs: int64>
              child 0, id: string
              child 1, action: string
              child 2, actor: string
              child 3, timestampMs: int64
              child 4, sourceTimestampUs: int64
      child 10, endedAt: string
      child 11, startSourceTimestampUs: int64
      child 12, endSourceTimestampUs: int64
      child 13, label: string
      child 14, recorderSlotCount: int64
      child 15, gapCount: int64
      child 16, frameCount: int64
episodeId: string
taskSpecificationPath: string
version: int64
taskSpecVersion: int64
episodeIndex: int64
schema: string
to
{'schema': Value('string'), 'version': Value('int64'), 'episodeId': Value('string'), 'episodeIndex': Value('int64'), 'captureMetadata': {'schema': Value('string'), 'version': Value('int64'), 'camera': {'selection': {'availability': Value('string'), 'value': {'label': Value('string'), 'side': Value('string')}}, 'width': {'availability': Value('string'), 'value': Value('int64')}, 'height': {'availability': Value('string'), 'value': Value('int64')}, 'frameRate': {'availability': Value('string'), 'value': Value('int64')}, 'calibration': {'availability': Value('string')}}, 'device': {'headsetModel': {'availability': Value('string'), 'value': Value('string')}, 'questBrowser': {'availability': Value('string'), 'value': Value('bool')}, 'sensorSource': {'availability': Value('string'), 'value': Value('string')}, 'handTracking': {'availability': Value('string'), 'value': Value('string')}}, 'recorder': {'rateHz': {'availability': Value('string'), 'value': Value('int64')}}, 'study': {'headsetId': Value('null'), 'demonstratorId': Value('string'), 'demonstratorIdOrigin': Value('string'), 'projectId': Value('null'), 'consentDate': Value('null'), 'consentDocumentId': Value('null')}, 'audio': {'rawMicrophoneAudioRetained': Value('bool')}}, 'segments': List({'id': Value('string'), 'taskId': Value('string'), 'taskLabel': Value('string'), 'taskDescription': Value('string'), 'repetition': Value('int64'), 'take': Value('int64'), 'startedAt': Value('string'), 'outcome': Value('string'), 'accepted':
...
tartSourceTimestampUs': Value('int64'), 'endSourceTimestampUs': Value('int64'), 'label': Value('string'), 'recorderSlotCount': Value('int64'), 'gapCount': Value('int64'), 'frameCount': Value('int64')}), 'taskSpecVersion': Value('int64'), 'taskSpecHash': Value('string'), 'taskSpecificationPath': Value('string'), 'editorProvenance': {'schema': Value('string'), 'version': Value('int64'), 'taskSources': {'0:task-001': {'id': Value('string'), 'type': Value('string'), 'label': Value('string'), 'instructions': Value('string'), 'repeatCount': Value('int64'), 'resetTimeS': Value('int64')}}, 'segmentSources': {'b53a2642-a5f4-4a2e-ad4b-8eb9492bc2ee-segment-1': {'id': Value('string'), 'taskId': Value('string'), 'taskLabel': Value('string'), 'taskDescription': Value('string'), 'repetition': Value('int64'), 'take': Value('int64'), 'startedAt': Value('string'), 'frameCount': Value('int64'), 'gapCount': Value('int64'), 'recorderSlotCount': Value('int64'), 'outcome': Value('string'), 'accepted': Value('bool'), 'annotations': List({'id': Value('string'), 'action': Value('string'), 'actor': Value('string'), 'timestampMs': Value('int64'), 'sourceTimestampUs': Value('int64')}), 'endedAt': Value('string'), 'startSourceTimestampUs': Value('int64'), 'endSourceTimestampUs': Value('int64')}}, 'taskLineage': {'task-001': List(Value('string'))}, 'segmentLineage': {'b53a2642-a5f4-4a2e-ad4b-8eb9492bc2ee-segment-1': List(Value('string'))}, 'sourceRevision': Value('string'), 'operationId': Value('string')}}
because column names don't match
Traceback:    Traceback (most recent call last):
                File "/src/services/worker/src/worker/utils.py", line 149, in get_rows_or_raise
                  return get_rows(
                      dataset=dataset,
                  ...<4 lines>...
                      column_names=column_names,
                  )
                File "/src/libs/libcommon/src/libcommon/utils.py", line 272, in decorator
                  return func(*args, **kwargs)
                File "/src/services/worker/src/worker/utils.py", line 129, in get_rows
                  rows_plus_one = list(itertools.islice(safe_iter(ds, dataset=dataset), rows_max_number + 1))
                File "/src/services/worker/src/worker/utils.py", line 489, in safe_iter
                  yield from ds.decode(False) if ds.features else ds
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2818, in __iter__
                  for key, example in ex_iterable:
                                      ^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2355, in __iter__
                  for key, pa_table in self._iter_arrow():
                                       ~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2380, in _iter_arrow
                  for key, pa_table in self.ex_iterable._iter_arrow():
                                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 536, in _iter_arrow
                  for key, pa_table in iterator:
                                       ^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 419, in _iter_arrow
                  for key, pa_table in self.generate_tables_fn(**gen_kwags):
                                       ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 343, in _generate_tables
                  self._cast_table(pa_table, json_field_paths=json_field_paths),
                  ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 132, in _cast_table
                  pa_table = table_cast(pa_table, self.info.features.arrow_schema)
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2369, in table_cast
                  return cast_table_to_schema(table, schema)
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2297, in cast_table_to_schema
                  raise CastError(
                  ...<3 lines>...
                  )
              datasets.table.CastError: Couldn't cast
              format: string
              oracle_commit: string
              artifacts: list<item: struct<path: string, media_type: string, byte_length: int64>>
                child 0, item: struct<path: string, media_type: string, byte_length: int64>
                    child 0, path: string
                    child 1, media_type: string
                    child 2, byte_length: int64
              taskSpecHash: string
              captureMetadata: struct<schema: string, version: int64, camera: struct<selection: struct<availability: string, value: (... 756 chars omitted)
                child 0, schema: string
                child 1, version: int64
                child 2, camera: struct<selection: struct<availability: string, value: struct<label: string, side: string>>, width: s (... 192 chars omitted)
                    child 0, selection: struct<availability: string, value: struct<label: string, side: string>>
                        child 0, availability: string
                        child 1, value: struct<label: string, side: string>
                            child 0, label: string
                            child 1, side: string
                    child 1, width: struct<availability: string, value: int64>
                        child 0, availability: string
                        child 1, value: int64
                    child 2, height: struct<availability: string, value: int64>
                        child 0, availability: string
                        child 1, value: int64
                    child 3, frameRate: struct<availability: string, value: int64>
                        child 0, availability: string
                        child 1, value: int64
                    child 4, calibration: struct<availability: string>
                        child 0, availability: string
                child 3, device: struct<headsetModel: struct<availability
              ...
                  child 0, item: string
                child 6, sourceRevision: string
                child 7, operationId: string
              segments: list<item: struct<id: string, taskId: string, taskLabel: string, taskDescription: string, repetition (... 350 chars omitted)
                child 0, item: struct<id: string, taskId: string, taskLabel: string, taskDescription: string, repetition: int64, ta (... 338 chars omitted)
                    child 0, id: string
                    child 1, taskId: string
                    child 2, taskLabel: string
                    child 3, taskDescription: string
                    child 4, repetition: int64
                    child 5, take: int64
                    child 6, startedAt: string
                    child 7, outcome: string
                    child 8, accepted: bool
                    child 9, annotations: list<item: struct<id: string, action: string, actor: string, timestampMs: int64, sourceTimestampUs:  (... 7 chars omitted)
                        child 0, item: struct<id: string, action: string, actor: string, timestampMs: int64, sourceTimestampUs: int64>
                            child 0, id: string
                            child 1, action: string
                            child 2, actor: string
                            child 3, timestampMs: int64
                            child 4, sourceTimestampUs: int64
                    child 10, endedAt: string
                    child 11, startSourceTimestampUs: int64
                    child 12, endSourceTimestampUs: int64
                    child 13, label: string
                    child 14, recorderSlotCount: int64
                    child 15, gapCount: int64
                    child 16, frameCount: int64
              episodeId: string
              taskSpecificationPath: string
              version: int64
              taskSpecVersion: int64
              episodeIndex: int64
              schema: string
              to
              {'schema': Value('string'), 'version': Value('int64'), 'episodeId': Value('string'), 'episodeIndex': Value('int64'), 'captureMetadata': {'schema': Value('string'), 'version': Value('int64'), 'camera': {'selection': {'availability': Value('string'), 'value': {'label': Value('string'), 'side': Value('string')}}, 'width': {'availability': Value('string'), 'value': Value('int64')}, 'height': {'availability': Value('string'), 'value': Value('int64')}, 'frameRate': {'availability': Value('string'), 'value': Value('int64')}, 'calibration': {'availability': Value('string')}}, 'device': {'headsetModel': {'availability': Value('string'), 'value': Value('string')}, 'questBrowser': {'availability': Value('string'), 'value': Value('bool')}, 'sensorSource': {'availability': Value('string'), 'value': Value('string')}, 'handTracking': {'availability': Value('string'), 'value': Value('string')}}, 'recorder': {'rateHz': {'availability': Value('string'), 'value': Value('int64')}}, 'study': {'headsetId': Value('null'), 'demonstratorId': Value('string'), 'demonstratorIdOrigin': Value('string'), 'projectId': Value('null'), 'consentDate': Value('null'), 'consentDocumentId': Value('null')}, 'audio': {'rawMicrophoneAudioRetained': Value('bool')}}, 'segments': List({'id': Value('string'), 'taskId': Value('string'), 'taskLabel': Value('string'), 'taskDescription': Value('string'), 'repetition': Value('int64'), 'take': Value('int64'), 'startedAt': Value('string'), 'outcome': Value('string'), 'accepted':
              ...
              tartSourceTimestampUs': Value('int64'), 'endSourceTimestampUs': Value('int64'), 'label': Value('string'), 'recorderSlotCount': Value('int64'), 'gapCount': Value('int64'), 'frameCount': Value('int64')}), 'taskSpecVersion': Value('int64'), 'taskSpecHash': Value('string'), 'taskSpecificationPath': Value('string'), 'editorProvenance': {'schema': Value('string'), 'version': Value('int64'), 'taskSources': {'0:task-001': {'id': Value('string'), 'type': Value('string'), 'label': Value('string'), 'instructions': Value('string'), 'repeatCount': Value('int64'), 'resetTimeS': Value('int64')}}, 'segmentSources': {'b53a2642-a5f4-4a2e-ad4b-8eb9492bc2ee-segment-1': {'id': Value('string'), 'taskId': Value('string'), 'taskLabel': Value('string'), 'taskDescription': Value('string'), 'repetition': Value('int64'), 'take': Value('int64'), 'startedAt': Value('string'), 'frameCount': Value('int64'), 'gapCount': Value('int64'), 'recorderSlotCount': Value('int64'), 'outcome': Value('string'), 'accepted': Value('bool'), 'annotations': List({'id': Value('string'), 'action': Value('string'), 'actor': Value('string'), 'timestampMs': Value('int64'), 'sourceTimestampUs': Value('int64')}), 'endedAt': Value('string'), 'startSourceTimestampUs': Value('int64'), 'endSourceTimestampUs': Value('int64')}}, 'taskLineage': {'task-001': List(Value('string'))}, 'segmentLineage': {'b53a2642-a5f4-4a2e-ad4b-8eb9492bc2ee-segment-1': List(Value('string'))}, 'sourceRevision': Value('string'), 'operationId': Value('string')}}
              because column names don't match

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CERES capture dataset

LeRobot v3 episodes captured with CERES.

Open in the CERES dataset viewer

Acquisition statistics

  • Episodes: 1
  • Retained recorder slots: 2413
  • Explicit tracking gaps: 21
  • Captured duration: 1 min 20 s
  • Recorder rate: 30 Hz
  • Device: Native WebXR; Quest 3

Captured with CERES.

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