Audio file duration comparisons in Python

filename = '/Users/othrif/spectrum/voice/datasets/free-spoken-digit-dataset/recordings/4_yweweler_5.wav'

import timeit
import sox
import subprocess
import soundfile as sf

def get_length_with_ffprobe(input_audio):
    result = subprocess.run(['ffprobe', '-i', input_audio, '-show_entries', 'format=duration', '-v', 'quiet', '-of', 'default=noprint_wrappers=1:nokey=1'], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
    return float(result.stdout)

%time sf.info(filename).duration

CPU times: user 1.61 ms, sys: 3.46 ms, total: 5.07 ms
Wall time: 7.5 ms





0.333875

%time get_length_with_ffprobe(filename)

CPU times: user 2.78 ms, sys: 8.43 ms, total: 11.2 ms
Wall time: 92.1 ms





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%time sox.file_info.info(filename)['duration']

CPU times: user 9.91 ms, sys: 29.6 ms, total: 39.5 ms
Wall time: 112 ms





0.333875