Empty ValueError raised during augmentation

[rafaelgreca]

Hello!

I am doing augmentation on a bunch of audio files using batches, but somewhere in between I am getting an empty ValueError error. I know this error is coming from the io.py file located inside the utils folder (more precisely here), but I don't know what is causing it and how to fix it.

Any ideas on how to work around this issue?

Thanks in advance!

[iver56]

@hbredin Can you imagine why this would happen? The code does raise ValueError() without giving a specific error message. How can we improve the code?

[hbredin]

Most likely an off-by-one rounding error due to

torch-audiomentations/torch_audiomentations/utils/io.py

Line 232 in 1590056

original_sample_offset = round(

and

torch-audiomentations/torch_audiomentations/utils/io.py

Line 238 in 1590056

original_num_samples = round(

I believe using math.floor instead of round should fix the issue and we could safely remove the check that raises the ValueError.

@rafaelgreca could you by any chance find a way for us to reproduce the error?
You could just replace raise ValueError() by something like

raise ValueError(f"{audio_path=} {sample_offset=} {num_samples=}")

to find the faulty input argument combination.