Editing Python (section)

==== pydub notes ====

Install pydub

<pre>C:\Users\anon\Documents\python-venv
(pydub) λ pip install pydub</pre>

Install simpleaudio

<pre>C:\Users\anon\PycharmProjects\pydub
(pydub) λ pip install --upgrade pip setuptools

C:\Users\anon\PycharmProjects\pydub
(pydub) λ pip install simpleaudio</pre>

Sample Python script for splitting wav files on silence

<pre>import os
import argparse
import re
from pydub import AudioSegment
from pydub.silence import split_on_silence

parser = argparse.ArgumentParser(description='Split .wav files at one second or more of silence. A user specified '
                                             'directory will be searched and files with .wav extension will be '
                                             'processed. Split .wav files are stored in "chunks" directory relative to '
                                             'and with similar name as reference .wav file. Split files have "_NN" '
                                             'inserted into file name before .wav extension where NN is 00 to 99 '
                                             'incremented from 00. Supports up to 100 chunks per .wav file by only '
                                             'processing the first 100 chunks.')
parser.add_argument('dir', help='the path to directory where .wav files are located')
args = parser.parse_args()
folder_name = args.dir

regex_pattern_wav_file_ext = re.compile(r"""\.wav$""")  # Regex that can identify files ending with .wav.

chunk_path = r'{}\{}'.format(folder_name, 'chunks')
if not os.path.exists(chunk_path) and not os.path.isdir(chunk_path):
    os.mkdir(chunk_path)

for filename in os.listdir(folder_name):
    if regex_pattern_wav_file_ext.search(r'{}\{}'.format(folder_name, filename)):
        wav_file = AudioSegment.from_wav(r'{}\{}'.format(folder_name, filename))
        chunks = split_on_silence(wav_file, min_silence_len=1000, silence_thresh=-60, keep_silence=500)
        if chunks:
            for i, chunk in enumerate(chunks):
                if i > 99:
                    break
                chunk.export(r"{}\chunks\{}_{:02d}.wav".format(folder_name, filename[:-4], i), format="wav")
print('Script completed.')

</pre>