Download streams of .ts files

tsget.py

import re
import argparse
import os
import time
import subprocess
from subprocess import Popen

parser = argparse.ArgumentParser(description='get panopto files')
parser.add_argument('curl', type=str)
parser.add_argument('out', type=str)
parser.add_argument('--start', type=int, required=False, default=0)
parser.add_argument('--end', type=int, required=False, default=600)
parser.add_argument('--concurrency', type=int, required=False, default=50)

args = parser.parse_args()

cmd = re.sub(r'\d\d\d.ts', '{:03d}.ts', args.curl)

try:
    os.mkdir(args.out + "_files")
except:
    pass

popens = []
for i in range(args.start, args.end):
    print("Starting {}".format(i))
    popens.append(Popen(cmd.format(i),
                        shell=True,
                        stdout=open('{}_files/{:03d}.ts'.format(args.out, i), 'w'),
                        stderr=open(os.devnull)))
    if i > args.concurrency:
        print("Waiting on {}".format(i - args.concurrency))
        popens[i - args.concurrency].wait()

for i in range(args.end - args.concurrency, args.end):
    print("Waiting on {}".format(i))
    popens[i].wait()

print("Concatenating")
subprocess.call('cat {0}_files/*.ts > {0}.ts'.format(args.out), shell=True)