Compatibility issue with soundfile

[alexjbuck]

Compatibility issue with soundfile

[alexjbuck]

I have further narrowed this down.

If you write through an io.BytesIO object then it works.

# Writing to S3 through soundfile - Apparent Success
with smart_open.open(filepath.as_uri(), "wb", **transport_params) as file:
    with io.BytesIO() as temp:
        with sf.SoundFile(temp,mode='w', samplerate=sample_rate,channels=1,format='flac') as flac:
            flac.write(signal)
            print(f"S3 IO: {flac.frames=}")
        file.write(temp.getvalue())
# > S3 IO: f.frames=25000

# Reading without defining samples - Success
with smart_open.open(filepath.as_uri(), 'rb', **transport_params) as file:
    with sf.SoundFile(io.BytesIO(file.read())) as fin:
        print(f"S3 IO: {fin.frames=}")
        samples = fin.read()
        print(f"S3 IO: {len(samples)=}")
# > S3 IO: fin.frames=25000
# > S3 IO: len(samples)=25000

Compare this to the version that failed (which is the way I was led to believe this should work through the examples)

# Writing to S3 through soundfile - Apparent Success (actual failure!)
with smart_open.open(filepath.as_uri(), "wb", **transport_params) as file:
    with sf.SoundFile(file,mode='w', samplerate=sample_rate,channels=1,format='flac') as f:
        f.write(signal)
        print(f"S3 IO: {f.frames=}")
# > S3 IO: f.frames=25000