BEAST dataset: IBL

This dataset from the International Brain Lab (IBL) and consists of unlabeled frames from videos of head-fixed mice performing a decision-making task (IBL et al., Nature 2025). Two cameras–‘left’ (60 Hz) and ‘right’ (150 Hz)–capture roughly orthogonal side views of the mouse’s face and upper trunk during each session. We use only the left camera. Frames are downsampled to 256 × 320 pixels.This dataset consists of 270,025 frames from 77 videos. We accessed the raw videos under the CC-BY 4.0 license using these instructions: https://int-brain-lab.github.io/iblenv/notebooks_external/data_release_brainwidemap.html.