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Pepijn
1bd53cc7da
PyAV segfaulted (exit 139) decoding the AV1 streams modern LeRobot datasets use — a SIGSEGV that the per-episode try/except cannot catch, killing the whole job when the interjections phase started. Replace the PyAV fallback with _decode_frames_ffmpeg, which shells out to the ffmpeg CLI: a full ffmpeg build decodes AV1, and a child-process crash is a catchable non-zero exit rather than a segfault. Decoder chain is now torchcodec -> ffmpeg. _decode_frames_av stays available behind video_backend="pyav" for callers that want it. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>