hls_ts_download.py

"""Quick and dirty HLS transport stream downloader.
Give it a URI that points to a media playlist (one that contains transport stream URIs,
not a multivariant playlist that contains other playlist URIs).
It will read the playlist, download all the segments, and write them to your chosen
output location.
A single output file is created. This works because MPEG Transport Stream files
can be concatenated.
"""
from argparse import ArgumentParser
from concurrent.futures import ThreadPoolExecutor
from sys import argv

from m3u8 import loads as m3u8_loads
from requests import Session


def main(args=None):
    args = args or argv[1:]
    argument_parser = ArgumentParser(description='HLS transport stream downloader')
    argument_parser.add_argument('playlist_uri', type=str, help='Playlist location')
    argument_parser.add_argument(
        'output_path', type=str, help='Output transport stream location'
    )
    argument_parser.add_argument(
        '--threads', type=int, default=8, help='Number of concurrent downloads'
    )
    parsed_args = argument_parser.parse_args()

    playlist_uri = parsed_args.playlist_uri
    max_workers = parsed_args.threads
    output_path = parsed_args.output_path

    pool = ThreadPoolExecutor(max_workers=max_workers)
    session = Session()
    outfile = open(output_path, 'wb')

    with pool, session, outfile:
        playlist_text = session.get(playlist_uri).text
        parsed_playlist = m3u8_loads(playlist_text, uri=playlist_uri)

        all_uris = (s.absolute_uri for s in parsed_playlist.segments)
        for data in pool.map(lambda uri: session.get(uri).content, all_uris):
            outfile.write(data)


if __name__ == '__main__':
    main()

You'll need to run python -m pip install m3u8 requests to download the required libraries for this script. Then run it with python ./hls_ts_download.py.