how to support multiple datasets

[lucasjinreal]

hi, currently the data only supports single dataset, how to support multiple dataset, since users might have multiple batch of lerobot dataset format.

[xianglunkai]

@lucasjinreal
you should create a multi-lerobot dataset

[lucasjinreal]

how to create that? i have multiple folders contains different batch of data, but in training config there is only a dataset path can be configured.