Need help to download TeleQuebec.tv video

[Bbz]

Hi,

In summary I've generated the client_id.bin and private_key.pem, from which I generated *.wvd file
From the video website https://video.telequebec.tv/player/48496/stream?assetType=episodes&playlist_id=314 I got the pssh and extracted the license server post request to curl bash, which I pass to https://curlconverter.com/ and updated the l3.py file as I think it should

from pywidevine.cdm import Cdm
from pywidevine.device import Device
from pywidevine.pssh import PSSH
import requests

headers = {
    'accept': '*/*',
    'accept-language': 'en-US,en;q=0.9,fr;q=0.8',
    'content-type': 'text/xml; charset=UTF-8',
    'dnt': '1',
    'origin': 'https://video.telequebec.tv',
    'priority': 'u=1, i',
    'referer': 'https://video.telequebec.tv/',
    'sec-ch-ua': '...',
    'sec-ch-ua-mobile': '?0',
    'sec-ch-ua-platform': '"Windows"',
    'sec-fetch-dest': 'empty',
    'sec-fetch-mode': 'cors',
    'sec-fetch-site': 'cross-site',
    'soapaction': '"http://schemas.microsoft.com/DRM/2007/03/protocols/AcquireLicense"',
    'user-agent': '...',
}

params = {
    'fastly_token': '...',
    'pubid': '...',
}

pssh = PSSH("...")
lic_url = "https://manifest.prod.boltdns.net/license/v1/cenc/playready/..."

# load device
device = Device.load(r"C:\Users\...")

# load cdm
cdm = Cdm.from_device(device)

# open cdm session
session_id = cdm.open()

# get license challenge
challenge = cdm.get_license_challenge(session_id, pssh)

# send license challenge (assuming a generic license server SDK with no API front)
licence = requests.post(lic_url, params=params, headers=headers, data=challenge)
print(licence.content)
#licence.raise_for_status()

# parse license challenge
cdm.parse_license(session_id, licence.content)

# print keys
for key in cdm.get_keys(session_id):

    if key.type=='CONTENT':
        print(f"\n--key {key.kid.hex}:{key.key.hex()}")

# close session, disposes of session data
cdm.close(session_id)

as is the code above receive

b'{"error":"retrieving license: 400 "}'

when requesting the license
I tried to decrypt the challenge which is returned by "cdm.get_license_challenge(session_id, pssh)" but I wasn't able to decode it with utf-8 or latin-1, it didn't seems to be a base64
So I tried to reuse the same challenge as my browser, which is a soap request body, that worked but it returned a soap response

<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlnsoap="http://schemas.xmlsoap.org/soap/envelope/" xmlnssi="http://www.w3.org/2001/XMLSchema-instance" xmlnssd="http://www.w3.org/2001/XMLSchema"><soap:Body><AcquireLicenseResponse xmlns="http://schemas.microsoft.com/DRM/2007/03/protocols"><AcquireLicenseResult><Response xmlns="http://schemas.microsoft.com/DRM/2007/03/protocols/messages"><LicenseResponse xmlns="http://schemas.microsoft.com/DRM/2007/03/protocols"><Version>1</Version><Licenses><License>...</License></Licenses></LicenseResponse></Response></AcquireLicenseResult></AcquireLicenseResponse></soap:Body></soap:Envelope>

and the

signed_message.ParseFromString(license_message)

failed to parse the license (soap response) so I manually extracted the license node value and tried to feed it to ParseFromString and this time I got this error

pywidevine.exceptions.InvalidLicenseMessage: Could not parse license_message as a SignedMessage, Error parsing message

Any idea how to query the license and parse the license?
Also I'm a bit uncertain about how to proceed after this step, from my understanding I can download the encrypted video with the following command
yt-dlp --allow-u --downloader aria2c --cookies-from-browser chrome "https:// ..."
Then decrypt with the following command
mp4decrypt --key [IS THIS THE KEY FROM l3.py OUTPUT] --show-progress "INPUT_FILE" "OUTPUT_FILE"
is that right?

Thank you

[sarvo99]

Use https://github.com/DevLARLEY/WidevineProxy2

[Silv3r]

N_m3u8DL-RE "https://manifest.prod.boltdns.net/manifest/v1/dash/live-baseurl/bccenc/6150020952001/f038fea3-ad14-405f-b487-5fae9e19ed05/6s/manifest.mpd?fastly_token=Njc2OWYzNmJfMjE3YWIzMDMzYWY2ZDBiMzQ2ZjJjZjY2YWIzZTBjYjBiOTdjMTNlNTg4Y2VjMWU4MjMzMzEzOTQ2ZjM0MDViZA%3D%3D&pubid=6101674910001&platform=Web&os=Windows_NT_10.0&model=133.0&mfgr=Firefox&app_id=video.telequebec.tv" -H "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:133.0) Gecko/20100101 Firefox/133.0" -H "Accept: */*" -H "Referer: https://video.telequebec.tv/" -H "Origin: https://video.telequebec.tv" -H "DNT: 1" -H "Sec-GPC: 1" -H "Proxy-Authorization: Basic ZDJYVXNMNUJ6cWhOTFZldUw2ZmNoNHRDOnk3TnlMdHZuTnloTVVER3FuVnM2ckJrQw==" --key 8e799cb931374e67a9b6c1daf7368d03:1ebeba9ec48f2aa3b67a080699f74574 -M format=mkv

[Bbz]

Ok, so the good news is that worked, it was a bit complex as it didn't work on chrome or edge, the website timed out but it worked on another browser.
So I got the key and downloaded the encrypted files.

Using mp4decrypt with the WidevineProxy2 key
I was able to decrypt the audio
and the first 21:55 minutes of the 24:55 minutes length of the video after which it failed with "ERROR: failed to process the file (-8)"
Both the decrypted audio and the video part sound and look fine

Any idea what this error is, and how to fix that?

Thank you

[Bbz]

Thank you Silv3r, I just realised that WidevineProxy2 provide the "N_m3u8DL-RE" command out of the box which works
All good
Thank you all

[Bbz]

Ok so it worked well for all this playlist, however I tried another video on the same site https://video.telequebec.tv/player/47740/stream?assetType=episodes&playlist_id=524 and it seems WidevineProxy2 doesn't pickup the stream, I don't see anything in the logs, I tried with both my Widevine Device and Remote CDN, I restarted and cleared cache multiple times
Any idea?

[sarvo99]

Ok so it worked well for all this playlist, however I tried another video on the same site https://video.telequebec.tv/player/47740/stream?assetType=episodes&playlist_id=524 and it seems WidevineProxy2 doesn't pickup the stream, I don't see anything in the logs, I tried with both my Widevine Device and Remote CDN, I restarted and cleared cache multiple times
Any idea?

First video you linked worked with the extension i downloaded the video full length is decrypted properly no issues with that.
Second video is unencrypted (no drm) which means u can just filter for m3u8 in networks tab and download it using N_m3u8DL-RE..........no keys needed.

[Bbz]

I did not expect that

Thank you sarvo99