widevine

Widevine

Example:

widevine `
-b 63363432-3534-6364-6237-656465336530 `
-a https://lic.drmtoday.com/license-proxy-widevine/cenc/?specConform=true `
-h x-dt-custom-data:eyJ1c2VySWQiOiJhbm9uaW0iLCJzZXNzaW9uSWQiOiJrRGJZZUlYeVM4VjNtNXVRMjRtU0F6cThXdDkiLCJtZXJjaGFudCI6ImNkYSJ9

How to get key id?

If you look in the MPD file, you should see it:

<ContentProtection value="cenc" schemeIdUri="urn:mpeg:dash:mp4protection:2011"
cenc:default_KID="63363432-3534-6364-6237-656465336530"/>

How to get license URL and header?

If you watch the requests on the video page, you should see a request similar to this:

POST https://lic.drmtoday.com/license-proxy-widevine/cenc/?specConform=true HTTP/1.1
Accept-Language: en-US,en;q=0.5
Accept: */*
Connection: keep-alive
DNT: 1
Origin: https://www.cda.pl
Referer: https://www.cda.pl/video/391634853/vfilm
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:88.0) Gecko/20100101 Firefox/88.0
x-dt-custom-data: eyJ1c2VySWQiOiJhbm9uaW0iLCJzZXNzaW9uSWQiOiJrRGJZZUlYeVM4VjNtNXVRMjRtU0F6cThXdDkiLCJtZXJjaGFudCI6ImNkYSJ9

Sometimes, only the URL is needed, in which case you can omit the header option. It depends on the license server.

How to get client ID and private key files?

I cant host those here for legal reasons, but you should be able to download them from here:

https://github.com/Jnzzi/4464_L3-CDM

or search:

https://github.com/search?q=L3+CDM

or you can dump your own:

https://github.com/89z/mech/tree/v1.54.2/widevine#how-to-dump-l3-cdm

Note that if you choose to download the files from the link above, you need to either rename the files to match the defaults, or you can manually set the paths like this:

-c string
     client ID (default "C:\\Users\\Steven\\mech\\client_id.bin")
-k string
     private key (default "C:\\Users\\Steven\\mech\\private_key.pem")

Unrecognized option cenc_decryption_key

This option is only available with FFmpeg builds since 2022-05-16