def main():
lock = Lock()
if len(argv) < 2:
print('Must have file path argument.')
exit()
global file_dir
file_dir = argv[1]
files = glob.glob(f'{file_dir}/out/**/*.jpg', recursive=True)
if not path.exists(f'{file_dir}/faces'):
mkdir(f'{file_dir}/faces')
with Pool(initializer=init_child, initargs=(lock, )) as p:
p.map(find_faces, files)
