How to decrypt this?

[Manickam]

Hi guys,

Somebody please try decrypting this small clip with kid:key generated from widevine guesser.
--key b64dc076610350a7a91ec59850096066:89bceb31a70b355a6 028848489042755
--key da651a7a00eb5c6a9d810499d3ab5a8a:a4b846b5770afa680 8c3560b87ee589a

But while downloading nm3u8dl shows kid ae842f84edee5ffaa28e4bff640b28ef

How to decrypt this video with same kid but two keys? Any tool available or any different decryption method available?

[Obo]

Hmm; the PSSH extracted from the video says it needs a keyid "0a99223bea7f52859168de21b3032e64". (You can also use mp4info to find the keyid.)

mp4decrypt --key 0a99223bea7f52859168de21b3032e64:89bceb31a70b355a6028848489042755 encrypted_video.mp4 decrypted.mp4

kind of decrypts the video (it plays in VLC), but ffprobe shows strange stats:
"Duration: 481378:35:05.17, start: 1732961697.249322, bitrate: N/A"

[Manickam]

Ok. Fine. Thanks. Now video got partially decrypted. So how to use Same kid 0a99223bea7f52859168de21b3032e64 with the two different keys.

[Obo]

To my understanding you can't do this directly. What seems to work is to decrypt the video twice, the second time with the second key. That makes the second half of the clip visible.

I've then used mkvtoolnix to convert (or repair?) the two decrypted mp4's into mkv's with proper stats. Next step would be to cut the clips and merge the correctly decoded parts.

[Manickam]

Yeah complicated process. Can you able to fix everything without any video frame loss?

Will be good if Some experts create some tools or script to decrypt using same kid different keys at a time.

[iamghost]

video site URL?

[2nHxWW6GkN1l916N3ayz8HQoi]

You can do a lossless cut by keyframes using avidemux and you won't miss any video frames.
https://www.swisstransfer.com/d/40e7d094-b504-4b52-8b59-1a0abf01cba6

[Manickam]

Loseless copy mode in avidemiux Sometimes fails. So reencoding sees the only way.? I have to miss some frames to use copy mode.

[2nHxWW6GkN1l916N3ayz8HQoi]

No reencoding needed. Video copy + audio copy in avidemux does the job. Decrypt both parts like @obo said and you get 2 mp4s. Then import first one, do a cut till 10 min mark, import second, do a new cut from 10 min mark and you obtain 2 cut mp4 with no reencoding done. Then you append them in avidemux with again video/audio copy.

Since you do a cut by keyframes, nothing is lost so no frames sacrificed. The encrypted content with their different keys is split perfectly across a single keyframe.

That's exactly what I did step by step and I had no problems with your video and no frames lost

Edit: download the video from the swisstransfer link if you have trouble with avidemux

[Manickam]

Error msg: Saved video is incomplete. This may happen as result of invalid time stamps in the video.