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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
competitor_id: string
confidence: double
dataset_id: string
extras: struct<model_id: string>
  child 0, model_id: string
lang: string
modality: string
plugin_id: string
prediction: string
reference_text: string
sample_id: string
elapsed_ms: double
audio_url: null
plugin_version: string
audio_secs: double
created_at: string
hw: struct<host_class: string, cpu_model: string, threads: int64, accelerator: string, hostname: string>
  child 0, host_class: string
  child 1, cpu_model: string
  child 2, threads: int64
  child 3, accelerator: string
  child 4, hostname: string
dataset_revision: string
peak_rss_mb: double
latency_ms: double
runner_version: string
to
{'competitor_id': Value('string'), 'sample_id': Value('string'), 'dataset_id': Value('string'), 'dataset_revision': Value('string'), 'lang': Value('string'), 'modality': Value('string'), 'plugin_id': Value('string'), 'plugin_version': Value('string'), 'runner_version': Value('string'), 'created_at': Value('string'), 'reference_text': Value('string'), 'prediction': Value('string'), 'confidence': Value('float64'), 'audio_url': Value('null'), 'latency_ms': Value('float64'), 'audio_secs': Value('float64'), 'elapsed_ms': Value('float64'), 'peak_rss_mb': Value('float64'), 'hw': {'host_class': Value('string'), 'cpu_model': Value('string'), 'threads': Value('int64'), 'accelerator': Value('string'), 'hostname': Value('string')}}
because column names don't match
Traceback:    Traceback (most recent call last):
                File "/src/services/worker/src/worker/utils.py", line 147, 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 127, 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 483, 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 2840, in __iter__
                  for key, example in ex_iterable:
                                      ^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2373, in __iter__
                  for key, pa_table in self._iter_arrow():
                                       ~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2398, 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 2378, in table_cast
                  return cast_table_to_schema(table, schema)
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2306, in cast_table_to_schema
                  raise CastError(
                  ...<3 lines>...
                  )
              datasets.table.CastError: Couldn't cast
              competitor_id: string
              confidence: double
              dataset_id: string
              extras: struct<model_id: string>
                child 0, model_id: string
              lang: string
              modality: string
              plugin_id: string
              prediction: string
              reference_text: string
              sample_id: string
              elapsed_ms: double
              audio_url: null
              plugin_version: string
              audio_secs: double
              created_at: string
              hw: struct<host_class: string, cpu_model: string, threads: int64, accelerator: string, hostname: string>
                child 0, host_class: string
                child 1, cpu_model: string
                child 2, threads: int64
                child 3, accelerator: string
                child 4, hostname: string
              dataset_revision: string
              peak_rss_mb: double
              latency_ms: double
              runner_version: string
              to
              {'competitor_id': Value('string'), 'sample_id': Value('string'), 'dataset_id': Value('string'), 'dataset_revision': Value('string'), 'lang': Value('string'), 'modality': Value('string'), 'plugin_id': Value('string'), 'plugin_version': Value('string'), 'runner_version': Value('string'), 'created_at': Value('string'), 'reference_text': Value('string'), 'prediction': Value('string'), 'confidence': Value('float64'), 'audio_url': Value('null'), 'latency_ms': Value('float64'), 'audio_secs': Value('float64'), 'elapsed_ms': Value('float64'), 'peak_rss_mb': Value('float64'), 'hw': {'host_class': Value('string'), 'cpu_model': Value('string'), 'threads': Value('int64'), 'accelerator': Value('string'), 'hostname': Value('string')}}
              because column names don't match

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OVOS stt bench — speech-massive-es-ES

Per-clip transcripts predictions of the registered OVOS Plugin Arena stt fighters over FBK-MT/Speech-MASSIVE-test.

One dedicated repo per modality; one dataset split per language; one JSONL file per fighter under predictions/<lang>/<competitor_id>.jsonl. Rows follow the arena §3.2 contract (pinned dataset_revision, plugin_version, latency_ms). Produced by the reproducible benchmark script in the arena repo; the arena's assemble workflow turns these rows into benchmark boards, blind battle pools and a benchmark-seeded ELO ladder.

Funded by the NGI0 Commons Fund / NLnet under grant agreement No 101135429, through the European Commission's Next Generation Internet programme.

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