Specifically from Rakuten TV (live.tv.rakuten.co.jp)
FMI: https://cdm-project.com/How-To/ & https://old.reddit.com/r/Piracy/comments/y30ffr/
- Install Tampermonkey: https://www.tampermonkey.net/
- Install yt-dlp: https://github.com/yt-dlp/yt-dlp#installation
- Install ffmpeg: https://ffmpeg.org/download.html
- Download Bento4: https://www.bento4.com/downloads/
- Have a proxy/VPN if you're not in Japan since stuff is geolocked
- Install this userscript: https://greasyfork.org/en/scripts/373903-eme-logger
- Search browser JS Console for
MediaKeySession::generateRequest, then press play on the video and look under "Init Data" - Get something like
AAAAMnBzc2gAAAAA7e+LqXnWSs6jyCfc1R0h7QAXXXXXXXXFtoyTEzFOZDD4T9lmTiI=
- After doing the above, go to your browser developer tools' Network tab and search for
Widevine - Right click > Copy > Copy link address
- Get something like
https://azcp001.keydelivery.japaneast.media.azure.net/Widevine/?kid=e0c5b68c-9313-314e-6430-f8XXXXXXXX22
- Left click on the Widevine entry from the above steps, under the "Headers tab" scroll down to "Request Headers"
- Copy the following lines & do some manual formatting, get something like:
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9,ja-JP;q=0.8,ja;q=0.7
Authorization: blahblah
Cache-Control: no-cache
Content-Length: "blahblah"
Origin: https://live.tv.rakuten.co.jp
Pragma: no-cache
Referer: https://live.tv.rakuten.co.jp/
User-Agent: blahblah
- Open https://cdrm-project.com/
- Input the results from the previous steps and press "Send"
- Hopefully see the "SUCCESS" message along with a key that looks like
e0c5b68c93133XXXXXXXX84fd9664e22:499047f36b770957XXXXXXXX9dfc4033
- In the developer console Network tab, search for
mpd - Find something that starts with
Manifest, right click and copy the URL, e.g.https://azclwds01.akamaized.net/9dc3547a-ede5-4aed-841f-5cXXXXXXXX0f/tXyKyP_tab_hd.ism/Manifest(format=mpd-time-csf,encryption=cenc,filter=pc_hd_001) - Run the Terminal command:
yt-dlp --allow-unplayable [url] - Get two files, an .mp4 and an .m4a
- In Bento4's
bin/folder, find themp4decryptcommand line utility - Navigate to this folder in your Terminal and run
mp4decrypt --key [yourkey] /path/to/corrupted.file /path/to/fixed.fileon both files - Run
ffmpeg -i fixedvideo.mp4 -i fixedaudio.m4a -c:v copy -c:a copy output.mp4 - The end

yes, unfortuanly i didnt have a fix for this guide but i found software named chris-pc youtube downloader pro which has link expert which scans the m3u8 link and you can download the video and audio. After that you can add them together in the same program. Downside is it cost 48 euro for a year and there isnt a cracked version thats working. I tried with 14 days trail where you can download 5 minute content at lowest quality which is free. I am waiting for next week to purchase a pro subscription.
https://www.videoyoutubedownloader.com/video-tube-downloader-professional.html
here is topic i started on there forum
https://forum.chris-pc.com/viewtopic.php?f=20&t=12599