lerobot/lerobot/configs/default.yaml

defaults:
  - _self_
  - env: pusht
  - policy: diffusion

hydra:
  run:
    # Set `dir` to where you would like to save all of the run outputs. If you run another training session
    # with the same value for `dir` its contents will be overwritten unless you set `resume` to true.
    dir: outputs/train/${now:%Y-%m-%d}/${now:%H-%M-%S}_${env.name}_${policy.name}_${hydra.job.name}
  job:
    name: default

# Set `resume` to true to resume a previous run. In order for this to work, you will need to make sure
# `hydra.run.dir` is the directory of an existing run with at least one checkpoint in it.
# Note that when resuming a run, the default behavior is to use the configuration from the checkpoint,
# regardless of what's provided with the training command at the time of resumption.
resume: false
device: cuda  # cpu
# `use_amp` determines whether to use Automatic Mixed Precision (AMP) for training and evaluation. With AMP,
# automatic gradient scaling is used.
use_amp: false
# `seed` is used for training (eg: model initialization, dataset shuffling)
# AND for the evaluation environments.
seed: ???
# You may provide a list of datasets here. `train.py` creates them all and concatenates them. Note: only data
# keys common between the datasets are kept. Each dataset gets and additional transform that inserts the
# "dataset_index" into the returned item. The index mapping is made according to the order in which the
# datsets are provided.
dataset_repo_id: lerobot/pusht
video_backend: pyav

training:
  offline_steps: ???

  # Number of workers for the offline training dataloader.
  num_workers: 4

  batch_size: ???

  eval_freq: ???
  log_freq: 200
  save_checkpoint: true
  # Checkpoint is saved every `save_freq` training iterations and after the last training step.
  save_freq: ???

  # Online training. Note that the online training loop adopts most of the options above apart from the
  # dataloader options. Unless otherwise specified.
  # The online training look looks something like:
  #
  # for i in range(online_steps):
  #     do_online_rollout_and_update_online_buffer()
  #     for j in range(online_steps_between_rollouts):
  #         batch = next(dataloader_with_offline_and_online_data)
  #         loss = policy(batch)
  #         loss.backward()
  #         optimizer.step()
  #
  online_steps: ???
  # How many episodes to collect at once when we reach the online rollout part of the training loop.
  online_rollout_n_episodes: 1
  # The number of environments to use in the gym.vector.VectorEnv. This ends up also being the batch size for
  # the policy. Ideally you should set this to by an even divisor or online_rollout_n_episodes.
  online_rollout_batch_size: 1
  # How many optimization steps (forward, backward, optimizer step) to do between running rollouts.
  online_steps_between_rollouts: null
  # The proportion of online samples (vs offline samples) to include in the online training batches.
  online_sampling_ratio: 0.5
  # First seed to use for the online rollout environment. Seeds for subsequent rollouts are incremented by 1.
  online_env_seed: null
  # Sets the maximum number of frames that are stored in the online buffer for online training. The buffer is
  # FIFO.
  online_buffer_capacity: null
  # The minimum number of frames to have in the online buffer before commencing online training.
  # If online_buffer_seed_size > online_rollout_n_episodes, the rollout will be run multiple times until the
  # seed size condition is satisfied.
  online_buffer_seed_size: 0
  # Whether to run the online rollouts asynchronously. This means we can run the online training steps in
  # parallel with the rollouts. This might be advised if your GPU has the bandwidth to handle training
  # + eval + environment rendering simultaneously.
  do_online_rollout_async: false

  image_transforms:
  # These transforms are all using standard torchvision.transforms.v2
  # You can find out how these transformations affect images here:
  # https://pytorch.org/vision/0.18/auto_examples/transforms/plot_transforms_illustrations.html
  # We use a custom RandomSubsetApply container to sample them.
  # For each transform, the following parameters are available:
  #   weight: This represents the multinomial probability (with no replacement)
  #           used for sampling the transform. If the sum of the weights is not 1,
  #           they will be normalized.
  #   min_max: Lower & upper bound respectively used for sampling the transform's parameter
  #           (following uniform distribution) when it's applied.
    # Set this flag to `true` to enable transforms during training
    enable: false
    # This is the maximum number of transforms (sampled from these below) that will be applied to each frame.
    # It's an integer in the interval [1, number of available transforms].
    max_num_transforms: 3
    # By default, transforms are applied in Torchvision's suggested order (shown below).
    # Set this to True to apply them in a random order.
    random_order: false
    brightness:
      weight: 1
      min_max: [0.8, 1.2]
    contrast:
      weight: 1
      min_max: [0.8, 1.2]
    saturation:
      weight: 1
      min_max: [0.5, 1.5]
    hue:
      weight: 1
      min_max: [-0.05, 0.05]
    sharpness:
      weight: 1
      min_max: [0.8, 1.2]

eval:
  n_episodes: 1
  # `batch_size` specifies the number of environments to use in a gym.vector.VectorEnv.
  batch_size: 1
  # `use_async_envs` specifies whether to use asynchronous environments (multiprocessing).
  use_async_envs: false

wandb:
  enable: false
  # Set to true to disable saving an artifact despite save_checkpoint == True
  disable_artifact: false
  project: lerobot
  notes: ""