stream m3u8 url to rtmp in python (with pym3u8)

import json
import time
import datetime
import subprocess
import sys
import pym3u8
import os

def stream_to_rtmp(url, rtmp_url, duration = 0):
    if not os.path.isdir("logs"):
        os.makedirs("logs")
    # print(url)
    sys.stdout.write("{}:\tStarted: {}\n".format(rtmp_url, datetime.datetime.now()))
    sys.stdout.write("{}:\tStream: {}\n".format(rtmp_url, url))
    process = subprocess.Popen(['ffmpeg',
                                '-i', url,
                                '-acodec', 'copy',
                                '-vcodec', 'copy',
                                '-f', 'flv', rtmp_url], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
    log_file = open("logs/{}.txt".format(rtmp_url), '