Get .wav file length or duration

Question

I\'m looking for a way to find out the duration of a audio file (.wav) in python. So far i had a look at python wave library, mutagen, pymedi

Answer 1

we can use ffmpeg to get the duration of any video or audio files.

To install ffmpeg follow this link

import subprocess
import re

process = subprocess.Popen(['ffmpeg',  '-i', path_of_wav_file], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
stdout, stderr = process.communicate()
matches = re.search(r"Duration:\s{1}(?P<hours>\d+?):(?P<minutes>\d+?):(?P<seconds>\d+\.\d+?),", stdout, re.DOTALL).groupdict()

print(matches['hours'])
print(matches['minutes'])
print(matches['seconds'])

Answer 2

This is short and needs no modules, works with all operating systems:

import os
os.chdir(foo) # Get into the dir with sound
statbuf = os.stat('Sound.wav')
mbytes = statbuf.st_size / 1024
duration = mbytes / 200

Answer 3

A very simple method is to use pysoundfile, https://github.com/bastibe/PySoundFile

Here's some example code of how to do this:

import soundfile as sf
f = sf.SoundFile('447c040d.wav')
print('samples = {}'.format(len(f)))
print('sample rate = {}'.format(f.samplerate))
print('seconds = {}'.format(len(f) / f.samplerate))

The output for that particular file is:

samples = 232569
sample rate = 16000
seconds = 14.5355625

This aligns with soxi:

Input File     : '447c040d.wav'
Channels       : 1
Sample Rate    : 16000
Precision      : 16-bit
Duration       : 00:00:14.54 = 232569 samples ~ 1090.17 CDDA sectors
File Size      : 465k
Bit Rate       : 256k
Sample Encoding: 16-bit Signed Integer PCM