[mckv]

you can monkey-patch streamlink to change the key retrival url, tho it works fine even without doing it

import sys
import struct
import streamlink
from Crypto.Cipher import AES
from streamlink.exceptions import StreamError
from base64 import b64encode

session = streamlink.session.Streamlink()

def num_to_iv(n):
    return struct.pack(">8xq", n)

def new_create_decryptor(self, key, sequence):
    if key.method != "AES-128":
        raise StreamError("Unable to decrypt cipher {0}", key.method)

    if not key.uri:
        raise StreamError("Missing URI to decryption key")

    if self.key_uri != key.uri:
        new_uri = b'http://www.zoomtv.me/k.php?q='+b64encode(b'p=mlb&id=1&v=tv&vw=1&s='+b64encode(bytes(key.uri,'utf8')))
        res = self.session.http.get(new_uri.decode('utf-8'), exception=StreamError,
                                    retries=self.retries,
                                    **self.reader.request_params)
        self.key_data = res.content
        self.key_uri = key.uri

    iv = key.iv or num_to_iv(sequence)

    # Pad IV if needed
    iv = b"\x00" * (16 - len(iv)) + iv

    return AES.new(self.key_data, AES.MODE_CBC, iv)

streamlink.stream.hls.HLSStreamWriter.create_decryptor = new_create_decryptor

session.set_option("http-headers", {'Referer':'http://www.zoomtv.me/kembed.php?p=mlb&id=1&v=tv'})
streams = session.streams('hlsvariant://http://mlblive-akc.mlb.com/ls01/mlbam/mlb_network/NETWORK_LINEAR_1/master_wired.m3u8')
stream = streams["worst"]
fd = stream.open()
while True:
    sys.stdout.buffer.write(fd.read(100 * 1024))

python player.py | vlc -