videos from bigmarker.com

[blanc]

Hi,

I downloaded a webinar video from bigmarker.com but unfortunately it is encrypted and can’t be displayed correctly. Does anyone know how to handle this issue.

Link here: https://storage.to/IedwiAJDE

[xangetsue]

Have you used the right key and the right engine to decrypt it?

key: 92be2ae99b2fe019190ef452669e3530:31d1b78e10fe0eb87 fba28dd025257d9
format: mp4
decryption engine: mp4decrypt

you need to clean the filename as well, remove illegal charecters like / \ ? * : " | < >
This is the command I used

N_m3u8DL-RE "https://d38fobjf20dmzq.cloudfront.net/1b1771de-ba0b-431a-bb78-a98703bc5b6d/dash/dash.mpd" -H "Accept: */*" -H "DNT: 1" -H "Origin: https://www.bigmarker.com" -H "Referer: https://www.bigmarker.com/" -H "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36" --key 92be2ae99b2fe019190ef452669e3530:31d1b78e10fe0eb87fba28dd025257d9 -M format=mp4  --save-name "Webinar - A Historical Overview of Telemetry Technology - From the 1950s to Today by MA Business"

It works fine, here is the file
https://storage.to/IeqWM80Yj

[blanc]

I used WidevineProxy2 directly on bigmarker.com and got this command:

N_m3u8DL-RE "https://d38fobjf20dmzq.cloudfront.net/1b1771de-ba0b-431a-bb78-a98703bc5b6d/dash/dash.mpd" -H "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:140.0) Gecko/20100101 Firefox/140.0" -H "Accept: */*" -H "Referer: https://www.bigmarker.com/" -H "Origin: https://www.bigmarker.com" --key 92be2ae99b2fe019190ef452669e3530:31d1b78e10fe0eb87 fba28dd025257d9 --use-shaka-packager -M format=mkv

The key is Ok but an shaka-packager.exe error reports MSVCP140 is missing.

[LZAA]

decryption engine: mp4decrypt

...

[blanc]

I just used this command to do the decryption:

mp4decrypt.exe --key 92be2ae99b2fe019190ef452669e3530:31d1b78e10fe0eb87 fba28dd025257d9 --show-progress "F:\A Historical Overview of Telemetry Technology From the 1950s to.mp4" my_decrypted_file.mp4

but unfortunately it doesn’t seem to work. The output file is still encrypted.

[xangetsue]

This won’t work, you need to decrypt the compiled video.mp4 video first
Then decrypt the audio.m4a separately
At the end mux both audio_result.m4a with video_result.mkv using ffmpeg or any other tool

[blanc]

Do you mean I have to separate this file into video and audio track and decrypt them using the same key?

[xangetsue]

Do you mean I have to separate this file into video and audio track and decrypt them using the same key?

No, that won't work. it's a lost cause now, just delete the file and redownload it using this command without shaka packager. It will use the default decryption engine (mp4decrypt). Please make sure mp4decrypt is correctly added to your system's PATH and if it isn't, just place mp4decrypt.exe in the same folder you are running the command from

N_m3u8DL-RE "https://d38fobjf20dmzq.cloudfront.net/1b1771de-ba0b-431a-bb78-a98703bc5b6d/dash/dash.mpd" -H "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:140.0) Gecko/20100101 Firefox/140.0" -H "Accept: */*" -H "Referer: https://www.bigmarker.com/" -H "Origin: https://www.bigmarker.com" --key 92be2ae99b2fe019190ef452669e3530:31d1b78e10fe0eb87fba28dd025257d9 -M format=mp4