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"""
Script for extracting audio (16-bit, mono, 22000 Hz) from video file.
"""
import os
import argparse
import subprocess
def parse_args():
"""
Create python script parameters.
Returns
-------
ArgumentParser
Resulted args.
"""
parser = argparse.ArgumentParser(
description="Extract audio from video file",
formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument(
"--in-video",
type=str,
required=True,
help="path to input video file or directory")
parser.add_argument(
"--out-audio",
type=str,
help="path to output audio file")
args = parser.parse_args()
return args
def extract_audio(in_video,
out_audio):
"""
Real extract audio from video file.
Parameters
----------
in_video : str
Path to input video file.
out_audio : str
Path to output audio file.
"""
if not out_audio:
file_stem, _ = os.path.splitext(in_video)
out_audio = file_stem + ".wav"
# command1 = "ffmpeg -i {in_video} -vn -acodec copy {aac_audio}"
# command2 = "ffmpeg -i {aac_audio} -vn -acodec pcm_s16le -ac 1 -ar 22000 {out_audio}"
# command = "ffmpeg -i {in_video} -vn -acodec pcm_s16le -ac 1 -ar 22000 {out_audio}"
command = "ffmpeg -i {in_video} -vn -acodec pcm_s16le -ac 1 -ar 16000 {out_audio}"
subprocess.call([command.format(in_video=in_video, out_audio=out_audio)], shell=True)
def main():
"""
Main body of script.
"""
args = parse_args()
in_video = os.path.expanduser(args.in_video)
if not os.path.exists(in_video):
raise Exception("Input file/directory doesn't exist: {}".format(in_video))
if os.path.isfile(in_video):
extract_audio(
in_video=in_video,
out_audio=args.out_audio)
else:
video_file_paths = []
for file_name in os.listdir(in_video):
if not os.path.isfile(os.path.join(in_video, file_name)):
continue
_, file_ext = os.path.splitext(file_name)
if file_ext.lower() in (".mp4", ".mkv", ".avi"):
video_file_path = os.path.join(in_video, file_name)
video_file_paths.append(video_file_path)
video_file_paths = sorted(video_file_paths)
for video_file_path in video_file_paths:
extract_audio(
in_video=video_file_path,
out_audio="")
if __name__ == "__main__":
main()
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