stream m3u8 url to rtmp in python with pyffmpeg

def stream(m3u8_url, rtmp_url):
    command = [
        'ffmpeg',
        '-i',
        m3u8_url,
        '-c',
        'copy',
        '-f',
        'flv',
        rtmp_url
    ]
    subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)