Ttranslated from shaka-player project by xhlove.
pip install argparse
usage: dash mp4 vtt extractor v1.1@xhlove [-h] [-p PATH]
Dash Mp4 VTT Subtitle Extractor, which is translated from shaka-player project
by xhlove. Report bug to vvtoolbox.dev@gmail.com
optional arguments:
-h, --help show this help message and exit
-p PATH, --path PATH dash mp4 folder path