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Write image/audio/video blobs as is in parquet (PLAIN) #7976

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Merged
lhoestq merged 2 commits into from
Jan 31, 2026
Merged

Write image/audio/video blobs as is in parquet (PLAIN) #7976

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21cb3c6
plain encoding, uncompressed, no dict for videos in parquet
lhoestq Jan 31, 2026
1b8bd00
style
lhoestq Jan 31, 2026
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11 changes: 11 additions & 0 deletions src/datasets/io/parquet.py
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@

from .. import Dataset, Features, NamedSplit, config
from ..arrow_writer import get_writer_batch_size_from_data_size, get_writer_batch_size_from_features
from ..features.features import require_storage_embed
from ..formatting import query_table
from ..packaged_modules import _PACKAGED_DATASETS_MODULES
from ..packaged_modules.parquet.parquet import Parquet
Expand Down Expand Up @@ -126,6 +127,16 @@ def _write(self, file_obj: BinaryIO, batch_size: int, **parquet_writer_kwargs) -
schema=schema,
use_content_defined_chunking=self.use_content_defined_chunking,
write_page_index=self.write_page_index,
compression={
col: "none" if require_storage_embed(feature) else "snappy"
for col, feature in self.dataset.features.items()
},
use_dictionary=[
col for col, feature in self.dataset.features.items() if not require_storage_embed(feature)
],
column_encoding={
col: "PLAIN" for col, feature in self.dataset.features.items() if require_storage_embed(feature)
},
**parquet_writer_kwargs,
)

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