Channel4 (United Kingdom): get wvkeys http 404

[CrymanChen]

Folks, I tried to download a series from British channel4, but I met something wrong

url goes first: premium not needed, geo-restricted (UK), you can enjoy it by just watching a maybe 30-sec ad.

https://www.channel4.com/programmes/derry-girls/on-demand/59741-001

mpd file url:

https://ak-jos-c4assets-com.akamaized.net/CH4_08_02_900_59741001001001_008/CH4_08_02_900_59741001001001_008_J01.ism/stream.mpd?c3.ri=13506901869727903823&mpd_segment_template=time&filter=%28type%3D%3D%22video%22%26%26%28%28DisplayHeight%3E%3D288%29%26%26%28DisplayHeight%3C%3D576%29%29%29%7C%7Ctype%21%3D%22video%22&ts=1652232921&e=600&st=59vHhJG117NpJvjqdR3NVRJqgbsMzwxngSoD3X84rMM

I don't know if a mpd file will expire.

license server url:

https://c4.eme.lp.aws.redbeemedia.com/wvlicenceproxy-service/widevine/acquire

-------

in the mpd file, a KID was found:

<ContentProtection
        schemeIdUri="urn:mpeg:dash:mp4protection:2011"
        value="cenc"
        cenc:default_KID="00000000-0000-0000-0000-000003800593">
      </ContentProtection>

and it provided two methods, whose uuids are as below:

urn:uuid:9A04F079-9840-4286-AB92-E65BE0885F95
urn:uuid:EDEF8BA9-79D6-4ACE-A3C8-27DCD51D21ED

so I tried to generate a pssh at https://tools.axinom.com/generators/PsshBox

here is a screenshot:


[Attachment 64753 - Click to enlarge]

AAAAMnBzc2gAAAAAmgTweZhAQoarkuZb4IhflQAAABISEAAAAAAAAAAAAAAAAAOABZM=
AAAAMnBzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAABISEAAAAAAAAAAAAAAAAAOABZM=

as you can see, when I tried to get the wvkey, an http 404 error occurred.

is there anything I did wrong?

Thank you~

[naim2007]

use this script http://getwvkeys.cc/download/channel4.py
not notaghost site. the request is in json payload not bytes.

[CrymanChen]

use this script http://getwvkeys.cc/download/channel4.py
not notaghost site. the request is in json payload not bytes.

OK. Thanks for your help.
Will go and check about it later.

[bobob1928]

use this script http://getwvkeys.cc/download/channel4.py
not notaghost site. the request is in json payload not bytes.

Hello! im not quite understanding which part of the payload to put in getwvkeys. can someone please explain? thanks in advance!

[lomero]

search "acquire" from dev tool network. on right side you have payload tab. here you find token value

[bobob1928]

hey lomero! i see the token value but how should the headers be formatted? or should i just use the token value as the license?

[[ss]vegeta]

hey lomero! i see the token value but how should the headers be formatted? or should i just use the token value as the license?

Headers are already inside the channe4.py
Didn't you check?
Yes, you should just use the token value inside the channel4.py. Just replace it with the one that is already inside.
Not sure but maybe you should also change the url and request id.
This is everything in self.json_payloads

[bobob1928]

thank you vegeta and lomero! i see now what you're talking about i will try it soon and reply back if i have any more issues

[CrymanChen]

use this script http://getwvkeys.cc/download/channel4.py
not notaghost site. the request is in json payload not bytes.

I used python to try to download another one:


[Attachment 64773 - Click to enlarge]

the code is from the getwvkeys.cc.

the pssh is

AAAAUnBzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAAADIAAAAycHNzaAAAAADt74upedZKzqPIJ9zVHSHtAAAAEhIQexR0NjbPTGOrOWsEXY3GEg==

the lic server is

https://disney.playback.edge.bamgrid.com/widevine/v1/obtain-license

so is this method correct though the pssh is not right? or this method is also wrong?

Thank you~

[pkp]

Use this https://forum.videohelp.com/threads/405711-Does-anyone-know-how-to-get-the-keys-for-ch...-4#post2656360

[CrymanChen]

Use this https://forum.videohelp.com/threads/405711-Does-anyone-know-how-to-get-the-keys-for-ch...-4#post2656360

Many thanks!