VRTMax: no PSSH in mpd ?

[dwayne13]

So I'm trying to download https://www.vrt.be/vrtmax/a-z/de-jaren-00-voor-tieners/1/de-jaren-00-voor-tieners-s1a1/ (and the other seasons+episodes)
Looking at the mpd https://vod.vrtcdn.be/remix/content/vod/pl-142d5ce8-b371-4478-8232-cd2957e028aa/pl-142...!%3D%22AACL%22)) I cannot seem to locate the PSSH needed for http://108.181.133.95:8080/

Any idea what I am doing wrong ?

[CMak]

Found with VRT you need to extract the PSSH from the initialisation segment of the video as it's not in the MPD.

For this particular content the PSSH is:

AAAAX3Bzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAAD8iN3ZpZC1kYjM2YWJiYy05YTg3LTRhZjItYmFlOS04MDFmMDQxZTgyYjgtQ0ROXzVfSEQyMDI0TUZI49yVmwY=

[dwayne13]

may I ask how you found the init file ? only finding the commercial mp4's.
I think I know how to extract the PSSH from the init file, but if I know how to find that one, then I'm off to the races for all the episodes

And thx for the first PSSH already !

[shellcmd]

if you only need the init.mp4, you can use yt-dlp.

yt-dlp --quiet --no-warnings --allow-u --test -f bestvideo -o "./temp/video_segment_init.mp4" mpd_url

[CMak]

may I ask how you found the init file ? only finding the commercial mp4's.
I think I know how to extract the PSSH from the init file, but if I know how to find that one, then I'm off to the races for all the episodes

And thx for the first PSSH already !

Used some Python code that has been posted on here by various users and modified for VRT.

import base64
import requests
import json
import xmltodict

def find_wv_pssh_offsets(raw: bytes) -> list:
    offsets = []
    offset = 0
    while True:
        offset = raw.find(b'pssh', offset)
        if offset == -1:
            break
        size = int.from_bytes(raw[offset-4:offset], byteorder='big')
        pssh_offset = offset - 4
        offsets.append(raw[pssh_offset:pssh_offset+size])
        offset += size
    return offsets

def to_pssh(content: bytes) -> list:
    wv_offsets = find_wv_pssh_offsets(content)
    return [base64.b64encode(wv_offset).decode() for wv_offset in wv_offsets]

def from_file(init_location: str) -> list:
    print(f'Extracting PSSHs from init location: {init_location}\n')
    init_request = requests.get(init_location).content
    return to_pssh(init_request)


def extract_init(manifest: str):
    parse_mpd = xmltodict.parse(manifest)
    MPD_JSON = json.loads(json.dumps(parse_mpd))
    a = MPD_JSON['MPD']['BaseURL']
    b = MPD_JSON['MPD']['Period']['BaseURL']
    c = MPD_JSON['MPD']['Period']['AdaptationSet'][0]['SegmentTemplate']['@initialization']
    int_location = f'{a}{b}{c}'
    represent = MPD_JSON['MPD']['Period']['AdaptationSet'][0]['Representation']['@id']
    int_location = int_location.replace('$RepresentationID$',represent)
    return int_location



mpd_url = 'https://vod.vrtcdn.be/ondemand/content/vod/vid-db36abbc-9a87-4af2-bae9-801f041e82b8-CDN_5_HD2024MF/vid-db36abbc-9a87-4af2-bae9-801f041e82b8-CDN_5_HD2024MF_drm_da4d7ea1-0489-464e-aa06-a8afe6d1aa69.ism/.mpd?filter=%28%21%28type%3D%3D%22audio%22%26%26FourCC%21%3D%22AACL%22%29%29'
manifest = requests.get(mpd_url).text

init_location = extract_init(manifest)
psshList = from_file(init_location)

for x,y in enumerate(psshList):
    print(f'Extracted PSSH {x+1}: {y}\n')

[dwayne13]

Thx for the script, works like a charm.
http://108.181.133.95:8080/ is throwing an Error 403 now.

PSSH: AAAAX3Bzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAAD8iN3ZpZC 1kYjM2YWJiYy05YTg3LTRhZjItYmFlOS04MDFmMDQxZTgyYjgt Q0ROXzVfSEQyMDI0TUZI49yVmwY=
License: https://widevine-proxy.drm.technology/proxy
Headers:
Firefox/136.0
Accept: "*/*"
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate, br, zstd
Referer: https://www.vrt.be/
Content-Type: text/plain;charset=UTF-8
Content-Length: "250"
Origin: https://www.vrt.be
Connection: keep-alive
Sec-Fetch-Dest: empty
Sec-Fetch-Mode: cors
Sec-Fetch-Site: cross-site
Priority: u=4

First time I encounter that 403 error, no clue what the cause could be ?

[CMak]

Thx for the script, works like a charm.
http://108.181.133.95:8080/ is throwing an Error 403 now.

PSSH: AAAAX3Bzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAAD8iN3ZpZC 1kYjM2YWJiYy05YTg3LTRhZjItYmFlOS04MDFmMDQxZTgyYjgt Q0ROXzVfSEQyMDI0TUZI49yVmwY=
License: https://widevine-proxy.drm.technology/proxy
Headers:
Firefox/136.0
Accept: "*/*"
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate, br, zstd
Referer: https://www.vrt.be/
Content-Type: text/plain;charset=UTF-8
Content-Length: "250"
Origin: https://www.vrt.be
Connection: keep-alive
Sec-Fetch-Dest: empty
Sec-Fetch-Mode: cors
Sec-Fetch-Site: cross-site
Priority: u=4

First time I encounter that 403 error, no clue what the cause could be ?

Don't think you will have much luck with that site for VRT due to how the requests are handled as the request is sent to the licence server as a JSON payload and will contain a token as well as the licence challenge. You will need to use a browser add on like WidevineProxy2 or alternatively write a script using WKS-Keys or something similar.

[dwayne13]

used WidevindProxy2 plugin and that worked like a charm !
Thank you very much for the help, much appreciated !