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lerobot/src/lerobot
Khalil Meftah 6f0ba4be38 Record eval rollouts as LeRobot datasets (#3825)
* feat(eval): record eval rollouts as raw LeRobot datasets

- Record raw env observations inline during rollout(), before
preprocess_observation() transforms them. Uses LeRobotDataset.create()
with add_frame()/save_episode().

- Supports vectorized envs: each env in the batch records independently,
with save_episode() called per env on termination. Each task gets its
own dataset under output_dir/recordings/{task_group}_{task_id}/.

Enabled via --eval.recording=true; disabled by default.

* fix(eval): use FeatureType enum comparison instead of string value

* refactor(eval): per-env datasets recording, no double reset

- Extract _infer_shape_from_obs() to reduce nesting in feature conversion
- Move dataset creation into rollout() using its own env.reset() observation,
  eliminating the extra reset in run_one()
- Replace deepcopy with _shallow_copy_obs() for raw observation stashing
- Support batch_size > 1: each parallel env records to its own dataset
  (single env skips the env_0/ nesting for simplicity)
- One-time warning for env_features keys missing from observations
- Pass recording_dir + env_features through the call chain instead of
  a pre-built recording_dataset object

* refactor(eval): remove shape inference and shallow copy helpers

* feat(eval): optionally push recorded eval datasets to the Hub

* fix(eval): address review comments

- Wrap rollout loop in try/finally so finalize() runs on crash/interrupt
- Guard push_to_hub with num_episodes > 0 to avoid pushing empty datasets
- Hoist loop-invariant multi_env and base_repo_id out of creation loop
2026-06-23 14:03:57 +02:00
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2026-05-21 11:44:04 +02:00
2026-05-12 15:49:54 +02:00
2026-05-12 15:49:54 +02:00