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google / brax

Massively parallel rigidbody physics simulation on accelerator hardware.
Apache License 2.0
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Failure to write videos upon training completion #470

Open HowdyMoto opened 3 months ago

HowdyMoto commented 3 months ago

I'm on MacOS Sonoma, and when training completes, I get:

  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/os.py", line 225, in makedirs
    mkdir(name, mode)
OSError: [Errno 30] Read-only file system: '/saved_videos'

I've done chmod -R u+w . from my brax folder, I've set up brax using pip install -e . from my local repo, and finally, I'm running sudo learn humanoid, so I thought that would give it permissions to write the output video wherever it wishes.

Any tips on how to stop it from failing\? It's unclear to me where it's trying to write to by default.

btaba commented 3 months ago

Hi @HowdyMoto , it looks like it's try to write to '/saved_videos', so the root directory

Can you specify a logdir in your command? See https://github.com/google/brax/blob/2329ae76759e37b0b1f1861cf34e5a67d0f7efa8/brax/training/learner.py#L74C22-L74C28

Feel free to send over a PR to set a default logdir, perhaps /tmp/brax, possibly creating the directory if empty.