zjt24/record-test

Record Test TsFile

This dataset is a TsFile conversion of the Hugging Face dataset sattgle/record-test, which was created using LeRobot.

Modalities: Time-series. The original repository also contains front and rear camera video streams. Videos are not included in this repository and remain available at the source.

Source Dataset

• Original dataset: sattgle/record-test
• License: Apache-2.0
• Task category: robotics
• Robot type: so101_follower
• Task: clean
• LeRobot codebase version: v2.1
• Sampling rate: 30 fps
• Original video features: observation.images.front and observation.images.rear (640 x 360 RGB, AV1, 30 fps)

The source dataset card does not provide a paper, homepage, or detailed task protocol beyond the LeRobot provenance and task metadata above.

Source Consistency Note

The source repository contains inconsistent trailing files. Its meta/info.json declares 43 episodes and 45,113 frames, while the repository tree contains 50 frame Parquet files. Direct inspection found that files 41 and 42 were overwritten with embedded episode indexes 0 and 1, and files 43-49 are outside meta/episodes.jsonl and also duplicate earlier episode indexes.

This conversion therefore uses the contiguous, internally consistent files episode_000000.parquet through episode_000040.parquet: 41 episodes and 44,533 frames. The adjusted upload metadata and meta/info.json document the excluded files. The corresponding aligned source subset has 82 videos; all source videos remain upstream.

Converted Files

• TsFile: data/record_test.tsfile
• Rows: 44,533
• Episodes: 41 (0:41)
• Tasks: 1 (task_index = 0)
• Table name: record_test
• Time precision: milliseconds
• Metadata: meta/ is based on the source metadata and filtered to the validated episode range; meta/info.json records the TsFile mapping and source-repository anomalies.

Schema

Column	Role	Type	Notes
Time	TIME	INT64	round(timestamp * 1000), in milliseconds; restarts per episode
episode_index	TAG	INT64	Source episode identifier
task_index	TAG	INT64	Source task identifier
frame_index	FIELD	INT64	Source frame index, preserved
sample_index	FIELD	INT64	Renamed from source index
action_0 ... action_5	FIELD	FLOAT	Flattened from action[6]
observation_state_0 ... observation_state_5	FIELD	FLOAT	Flattened from observation.state[6]

The action and observation-state element order is: shoulder_pan.pos, shoulder_lift.pos, elbow_flex.pos, wrist_flex.pos, wrist_roll.pos, and gripper.pos.

episode_index and task_index are TAG columns, so an individual episode can be selected by filtering on episode_index.

Conversion Notes

• The 41 validated LeRobot frame Parquet files were merged into one TsFile.
• Vector columns were flattened by preserving the source column name, replacing . with _, and appending the element index.
• The source timestamp column is dropped because it is redundant with Time / 1000 seconds.
• The source index column is renamed to sample_index.
• Front and rear videos are omitted from the converted schema and are not uploaded here. Use the original dataset videos: https://huggingface.co/datasets/sattgle/record-test/tree/main/videos

Read Example

from tsfile import TsFileReader

path = "data/record_test.tsfile"
table = "record_test"

with TsFileReader(path) as reader:
    columns = [
        "episode_index",
        "task_index",
        "frame_index",
        "sample_index",
        "action_0",
        "observation_state_0",
    ]
    with reader.query_table(table, columns, batch_size=4096) as result:
        batch = result.read_arrow_batch()
        print(batch)

Citation

The original dataset card does not provide a BibTeX citation.