Raiplay: find a way to get the key above 2400 bitrate

[lucacolaiacomo]

https://mediapolisvod.rai.it/relinker/relinkerServlet.htm?cont=C1KrqCWRhfmaitSetissSla...gentRule=mpd-*
(note the parameters output=64 and overrideUserAgentRule)

With this url we obtain a xml with mpd and auth, replacing * with 5000 the error almost seems a suggestion:
Relinker Exception: Needed one of those content type (and bitrate if not *): mpd-5000

https://mediapolisvod.rai.it/relinker/relinkerServlet.htm?cont=C1KrqCWRhfmaitSetissSla...5000&output=64
(note the new parameter forceUserAgent=mpd-5000, output=64 as before)

This parameter looks promising...

I made a shell script to make the creation of the headers.py file faster:

#|/bin/bash
read -p "pssh: " pssh
read -p "lic: " lic
read -p "auth: " auth
cat > ~/.local/cdm/headers.py << EOF
import requests

headers = {
    'nv-authorizations': '$auth',
}
EOF
l3.py $pssh $lic

replace ~/.local/cdm/headers.py to the path where your header.py is located
l3.py is slightly modified to accept pssh and lic (license link) as parameters:

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Module: KEYS-L3
# Created on: 11-10-2021
# Authors: -∞WKS∞-
# Version: 1.1.0
import base64, requests, sys, xmltodict
import headers
from pywidevine.L3.cdm import cdm, deviceconfig
from base64 import b64encode
from pywidevine.L3.getPSSH import get_pssh
from pywidevine.L3.decrypt.wvdecryptcustom import WvDecrypt

def main():
    # Verifica che siano forniti due argomenti
    if len(sys.argv) != 3:
        print("Sintassi: l3.py <pssh> <lic_url>")
        return
    # Leggi gli argomenti dalla riga di comando
    pssh = sys.argv[1]
    lic_url = sys.argv[2]
    correct, keys = WV_Function(pssh, lic_url)
    for key in keys:
        print('--key ' + key)

def WV_Function(pssh, lic_url, cert_b64=None):
    wvdecrypt = WvDecrypt(init_data_b64=pssh, cert_data_b64=cert_b64, device=deviceconfig.device_android_generic)
    widevine_license = requests.post(url=lic_url, data=wvdecrypt.get_challenge(), headers=headers.headers)
    license_b64 = b64encode(widevine_license.content)
    wvdecrypt.update_license(license_b64)
    Correct, keyswvdecrypt = wvdecrypt.start_process()
    if Correct:
        return Correct, keyswvdecrypt

if __name__ == "__main__":
    main()

yt-dlp --allow-unplayable-formats "https://mediapolisvod.rai.it/relinker/relinkerServlet.htm?cont=C1KrqCWRhfmaitSetissSlashRGgeeqqEEqualeeqqEEqual&forceUserAgent=mpd-5000&output=64"

Now:

mp4decrypt --key 32dfa84df6cd34299cfcb442e79e856e:c4a73b7fe7d15b5dcea1d94f6b2c80db obfuscate.mp4 clear.mp4

Finally a decrypted video with a resolution of 1920x1080, same for audio (to do: remove the boring audio description)

Edit:
I found a way to download only the audio part in italian:

yt-dlp --allow-unplayable-formats -f "ba[language=Italiano]" "https://mediapolisvod.rai.it/relinker/relinkerServlet.htm?cont=C1KrqCWRhfmaitSetissSlashRGgeeqqEEqualeeqqEEqual&forceUserAgent=mpd-5000"