Please help me with video downloading

[Marsha0xGriffith]

Hi all.
I have long studied the forum and came to the conclusion that only here can help me to download and decrypt the DRM video
I want to download videos from kinescope.io hosting, apparently they use protection not similar to Widevine, it seems to me that it is ClearKey.

There are 2 videos on the page, EME logger shows the following output

[EME] Navigator::requestMediaKeySystemAccess
    Key System: org.w3.clearkey
    Supported Configurations:
    [
        {
            "initDataTypes": [
                "cenc"
            ],
            "videoCapabilities": [
                {
                    "contentType": "video/mp4;codecs=\"avc1.4D401E\"",
                    "robustness": ""
                }
            ],
            "distinctiveIdentifier": "optional",
            "persistentState": "optional",
            "sessionTypes": [
                "temporary"
            ]
        }
    ]

[EME] MediaKeySystemAccess::createMediaKeys
    Key System: org.w3.clearkey
    Configurations:
    {
        "audioCapabilities": [],
        "distinctiveIdentifier": "not-allowed",
        "initDataTypes": [
            "cenc"
        ],
        "label": "",
        "persistentState": "not-allowed",
        "sessionTypes": [
            "temporary"
        ],
        "videoCapabilities": [
            {
                "contentType": "video/mp4;codecs=\"avc1.4D401E\"",
                "robustness": ""
            }
        ]
    }

[EME] MediaKeys::createSession
    Session Type: temporary

[EME] MediaKeySession::generateRequest
    Session ID: (not available)
    Init Data Type: keyids
    Init Data: eyJraWRzIjpbIlpsRnZXRVY0YUhOQldHVnplVUZyUFEiXX0=

[EME] MediaKeys::createSession
    Session Type: temporary

[EME] MediaKeySession::generateRequest
    Session ID: (not available)
    Init Data Type: keyids
    Init Data: eyJraWRzIjpbIlpsRnZXRVY0YUhOQldHVnplVUZyUFEiXX0=

[EME] MediaKeySession::message
    Session ID: 1
    Message Type: license-request
    Message: eyJraWRzIjpbIlpsRnZXRVY0YUhOQldHVnplVUZyUFEiXSwidHlwZSI6InRlbXBvcmFyeSJ9
    Listeners: 
Array [ {…} ]

[EME] MediaKeySession::message
    Session ID: 2
    Message Type: license-request
    Message: eyJraWRzIjpbIlpsRnZXRVY0YUhOQldHVnplVUZyUFEiXSwidHlwZSI6InRlbXBvcmFyeSJ9
    Listeners: 
Array [ {…} ]

[EME] Navigator::requestMediaKeySystemAccess
    Key System: org.w3.clearkey
    Supported Configurations:
    [
        {
            "initDataTypes": [
                "cenc"
            ],
            "videoCapabilities": [
                {
                    "contentType": "video/mp4;codecs=\"avc1.4D401E\"",
                    "robustness": ""
                }
            ],
            "distinctiveIdentifier": "optional",
            "persistentState": "optional",
            "sessionTypes": [
                "temporary"
            ]
        }
    ]

[EME] MediaKeySystemAccess::createMediaKeys
    Key System: org.w3.clearkey
    Configurations:
    {
        "audioCapabilities": [],
        "distinctiveIdentifier": "not-allowed",
        "initDataTypes": [
            "cenc"
        ],
        "label": "",
        "persistentState": "not-allowed",
        "sessionTypes": [
            "temporary"
        ],
        "videoCapabilities": [
            {
                "contentType": "video/mp4;codecs=\"avc1.4D401E\"",
                "robustness": ""
            }
        ]
    }

[EME] MediaKeys::createSession
    Session Type: temporary

[EME] MediaKeySession::generateRequest
    Session ID: (not available)
    Init Data Type: keyids
    Init Data: eyJraWRzIjpbImJWWkxVSE00YnpCS0xVUXRSRWxSUFEiXX0=

[EME] MediaKeys::createSession
    Session Type: temporary

[EME] MediaKeySession::generateRequest
    Session ID: (not available)
    Init Data Type: keyids
    Init Data: eyJraWRzIjpbImJWWkxVSE00YnpCS0xVUXRSRWxSUFEiXX0=

[EME] MediaKeySession::message
    Session ID: 3
    Message Type: license-request
    Message: eyJraWRzIjpbImJWWkxVSE00YnpCS0xVUXRSRWxSUFEiXSwidHlwZSI6InRlbXBvcmFyeSJ9
    Listeners: 
Array [ {…} ]

[EME] MediaKeySession::message
    Session ID: 4
    Message Type: license-request
    Message: eyJraWRzIjpbImJWWkxVSE00YnpCS0xVUXRSRWxSUFEiXSwidHlwZSI6InRlbXBvcmFyeSJ9
    Listeners: 
Array [ {…} ]

[EME] MediaKeySession::update
    Session ID: 1
    Response: eyJrZXlzIjpbeyJrdHkiOiJvY3QiLCJhbGciOiJBMTI4S1ciLCJraWQiOiJabEZ2V0VWNGFITkJXR1Z6ZVVGclBRIiwiayI6IlZEUm9VM1kwVUd0cGJuSkdjV2cwUFEifV19

[EME] MediaKeySession::keystatuseschange
    Session ID: 1
    [USABLE] ZlFvWEV4aHNBWGVzeUFrPQ==
    Listeners: 
Array [ {…} ]

[EME] MediaKeySession::update
    Session ID: 2
    Response: eyJrZXlzIjpbeyJrdHkiOiJvY3QiLCJhbGciOiJBMTI4S1ciLCJraWQiOiJabEZ2V0VWNGFITkJXR1Z6ZVVGclBRIiwiayI6IlZEUm9VM1kwVUd0cGJuSkdjV2cwUFEifV19 

[EME] MediaKeySession::keystatuseschange
    Session ID: 2
    [USABLE] ZlFvWEV4aHNBWGVzeUFrPQ==
    Listeners: 
Array [ {…} ]

[EME] MediaKeySession::update
    Session ID: 4
    Response: eyJrZXlzIjpbeyJrdHkiOiJvY3QiLCJhbGciOiJBMTI4S1ciLCJraWQiOiJiVlpMVUhNNGJ6QktMVVF0UkVsUlBRIiwiayI6ImRESmpXbXBNZDBGWlQwZFdVRkpSUFEifV19

[EME] MediaKeySession::keystatuseschange
    Session ID: 4
    [USABLE] bVZLUHM4bzBKLUQtRElRPQ==
    Listeners: 
Array [ {…} ]

[EME] MediaKeySession::update
    Session ID: 3
    Response: eyJrZXlzIjpbeyJrdHkiOiJvY3QiLCJhbGciOiJBMTI4S1ciLCJraWQiOiJiVlpMVUhNNGJ6QktMVVF0UkVsUlBRIiwiayI6ImRESmpXbXBNZDBGWlQwZFdVRkpSUFEifV19

[EME] MediaKeySession::keystatuseschange
    Session ID: 3
    [USABLE] bVZLUHM4bzBKLUQtRElRPQ==
    Listeners: 
Array [ {…} ]

Can you please tell me what to do?)
With widevine I know how to bypass protection, but with clearkey has not yet encountered

[[ss]vegeta]

Maybe it works like this.
The last base64 response is:

eyJrZXlzIjpbeyJrdHkiOiJvY3QiLCJhbGciOiJBMTI4S1ciLCJraWQiOiJiVlpMVUhNNGJ6QktMVVF0UkVsUlBRIiwiayI6ImRESmpXbXBNZDBGWlQwZFdVRkpSUFEifV19

When you base64 decode this you get

{"keys":[{"kty":"oct","alg":"A128KW","kid":"bVZLUHM4bzBKLUQtRElRPQ","k":"dDJjWmpMd0FZT0dWUFJRPQ"}]}

When you base64 to hex the kid and k (key) you get

6d564b5073386f304a2d442d4449513d

7432635a6a4c7741594f47565052513d

So this might be your kid:key combination.
Buuuut I see the last 4 characters are the same and it kinda makes me think that it doesn't work like this.

[jack_666]

@Marsha0xGriffith


Please kindly give the top url of the video.


Btw: another great job [ss]vegeta


I have a suspicion the you can use those credentials with hlsdl

[Marsha0xGriffith]

Curl command to get master.mpd
https://pastebin.com/v7NWHkcF

But there is one strange thing, the video itself does not last more than 15 minutes, but when downloaded through mpd in the worst quality you get a file size of 9 GB
downloaded with

yt-dlp --allow-u --downloader aria2c

[Marsha0xGriffith]

Maybe it works like this.
The last base64 response is:

eyJrZXlzIjpbeyJrdHkiOiJvY3QiLCJhbGciOiJBMTI4S1ciLCJraWQiOiJiVlpMVUhNNGJ6QktMVVF0UkVsUlBRIiwiayI6ImRESmpXbXBNZDBGWlQwZFdVRkpSUFEifV19

When you base64 decode this you get

{"keys":[{"kty":"oct","alg":"A128KW","kid":"bVZLUHM4bzBKLUQtRElRPQ","k":"dDJjWmpMd0FZT0dWUFJRPQ"}]}

When you base64 to hex the kid and k (key) you get

6d564b5073386f304a2d442d4449513d

7432635a6a4c7741594f47565052513d

So this might be your kid:key combination.
Buuuut I see the last 4 characters are the same and it kinda makes me think that it doesn't work like this.

Thanks, but I have no way to test it yet, my internet is limited and there is not enough space on my VDS to fully decode a 9 GB file

I can not imagine how a video 13-15 minutes long in SD quality can take 9 GB

[[ss]vegeta]

The video you think is 13-15 minutes is prolly only a smaaall part of the content in this MPD.
This mpd is 500kb and it contains thousands of segments.
Even the audio is 13GB lol.

[[ss]vegeta]

Weird stuff is happening.
I downloaded the audio and MediaInfo says 163 hours.
Windows and media players say 25 minutes 30 seconds.
I tried decrypting the audio with the key I mentioned up there. Even after decryption, MediaInfo says it is still encrypted, and yet the audio is playable, at least for those 25 minutes and 30 seconds.

[pkp]

key above works...but size of video not matches with time...getting nearly 3 minutes for 3gb plus size

[Marsha0xGriffith]

Weird stuff is happening.
I downloaded the audio and MediaInfo says 163 hours.
Windows and media players say 25 minutes 30 seconds.
I tried decrypting the audio with the key I mentioned up there. Even after decryption, MediaInfo says it is still encrypted, and yet the audio is playable, at least for those 25 minutes and 30 seconds.

Thank you all, now looking for a suitable VPS to check
There is still a question about the size of the files))
The bitrate 223 mbps looks strange, maybe after decoding it will be possible to compress the video to an adequate size with ffmpeg

[Marsha0xGriffith]

Hi all, finally found a suitable vps server to test
It looks like it really works, only I still can't figure out how to bring the final file to a normal size.
I can also get the master.m3u8 from this site using the same link, but not sure if that helps.
I think the video/audio should be no bigger than 150 mb, but definitely not 50+ GB

Maybe someone has encountered a similar situation?
Is it possible to change mpd file in some way, maybe remove some extra parts to get normal sized files?
Or is it the only option - to download files of that size, decrypt them and then convert them?
If there are ffmpeg experts here - I'll be grateful for hints

[LZAA]

'Please kindly give the top url of the video.'

[ElCap]

Hi all, finally found a suitable vps server to test
It looks like it really works, only I still can't figure out how to bring the final file to a normal size.
I can also get the master.m3u8 from this site using the same link, but not sure if that helps.
I think the video/audio should be no bigger than 150 mb, but definitely not 50+ GB

Maybe someone has encountered a similar situation?
Is it possible to change mpd file in some way, maybe remove some extra parts to get normal sized files?
Or is it the only option - to download files of that size, decrypt them and then convert them?
If there are ffmpeg experts here - I'll be grateful for hints

looks like its not being parsed properly by yt-dlp (maybe its all the extra linebreaks and tabs thats causing a problem - or thats just what i see)
the mpd breaks up the file into fragments by using range requests.
you can grab the correct file by downloading the full mp4 file for video and audio, decrypting them and then joining them.
ie. for 360p

curl -o 360p.mp4 "https://kinescopecdn.net/7a16ef25-a06d-4915-b783-b59db753c39e/videos/a9f74926-8279-44e6-a08d-3462436e692c/assets/195901bf-9039-4f73-9f6d-dd1a5554b2f6/360p.mp4?expires=1652743983&sign=<blah>"

resulting joined video + audio for 360p is 25:31 long and ~60mb

heres a fixed up version of that mpd that works with yt-dlp
https://transfer.sh/get/tEyIGn/kinescope1.mpd

[pkp]

Nice Elcap....so that was the issue...all the tabs and spaces in mpd...if you clean it up it will work with yt-dlp...

[ElCap]

sort of.
even when i cleaned up the spaces and line breaks it still didnt want to work, so i recreated it similar to another mpd that used progressive download.
the mpd is much smaller now, but itd be much quicker to just grab one of the video and audio file links and manually grab the whole mp4 file, then decrypt, join etc.

[[ss]vegeta]

then decrypt, join etc.

What comes after joining?
I know some people tend to do something along the lines of... watching. But there's no fun in that.

[ElCap]

Archiving, of course.
This is only for educational purposes

[Marsha0xGriffith]

Yay, I finally figured it out!
Special thanks to [ss]vegeta and ElCap!
And thanks to everyone who helped me solve this difficult problem!

[VitinIvsky]

The solution for those who do not understand (windows):

yt-dlp.exe --merge-output-format mp4 https://kinescope.io/NumbersOfYourLesson/master.m3u8 --referer https://kinescope.io -o "NameYourLesson"

You should have the latest versions of "yt-dlp.exe" and "ffmpeg.exe" in the folder.
This command will download the video and audio streams separately, then merge them and give them the name you specify.
P.S All the participants in this thread deserve thanks, without their help I would not have guessed how to download from kinescope.io. You are cool!!!

[teri4]

Can you help me and explain step by step how to download video? Thank you very much, friends!

[lexaring]

The solution for those who do not understand (windows):

yt-dlp.exe --merge-output-format mp4 https://kinescope.io/NumbersOfYourLesson/master.m3u8 --referer https://kinescope.io -o "NameYourLesson"

You should have the latest versions of "yt-dlp.exe" and "ffmpeg.exe" in the folder.
This command will download the video and audio streams separately, then merge them and give them the name you specify.
P.S All the participants in this thread deserve thanks, without their help I would not have guessed how to download from kinescope.io. You are cool!!!

Good, very helpful! Thank you very much!
Did everything by the tutorial, the video is downloaded and merged with audio, however it looks like this:

[Attachment 68113 - Click to enlarge]

[Attachment 68114 - Click to enlarge]

The lenght is perfect - same as the online source. The size and resolution also should be fine (1,71 GB for a hour+ video source, 720p). Also noticed this error while downloading audio:

[Attachment 68115 - Click to enlarge]

There are some squeaky noise when Im trying to play the file in MPCHC and the video plays fast.

Is there some new "protection" on the kinescope side? Why it looks like this?
Thank you!

[lomero]

Did everything by the tutorial, the video is downloaded and merged with audio, however it looks like this

Is there some new "protection" on the kinescope side? Why it looks like this?

you talk about what video link? write here

[lexaring]

Did everything by the tutorial, the video is downloaded and merged with audio, however it looks like this

Is there some new "protection" on the kinescope side? Why it looks like this?

you talk about what video link? write here

A kinescope link obvioulsy.

[cedric8528]

Your video seems to be drm encrypted.

Give us the link

[lexaring]

Your video seems to be drm encrypted.

Give us the link

Yeap, looks like it. Tried it with another video and noticed "failed to seek for auxiliary info will only parse..." messages while downloading. So it is a DRM (by StackOverflow). So basically you can download only not DRM protected files using this method? Or is there a setting i can turn on to make it work?

[codehound]

Did everything by the tutorial, the video is downloaded and merged with audio, however it looks like this

Is there some new "protection" on the kinescope side? Why it looks like this?

you talk about what video link? write here

A kinescope link obvioulsy.

No one can help you while you are being vague, to be able to provide accurate assistance you must post the url of the video, and post cedric or someone who knows what they are doing, the login credentials via PM if it needs them too.

[lexaring]

Did everything by the tutorial, the video is downloaded and merged with audio, however it looks like this

Is there some new "protection" on the kinescope side? Why it looks like this?

you talk about what video link? write here

A kinescope link obvioulsy.

No one can help you while you are being vague, to be able to provide accurate assistance you must post the url of the video, and post cedric or someone who knows what they are doing, the login credentials via PM if it needs them too.

Are you saying you need to create UNIQUE solution for every video file?
The simple answer like "There is no way to download DRM protected files from kinescope" would be just fine.

[Quint]

A bit strange seems that if you used the above

yt-dlp.exe --merge-output-format mp4 https://kinescope.io/NumbersOfYourLesson/master.m3u8 --referer https://kinescope.io -o "NameYourLesson"

why it was possible to download encrypted streams without an --allow-u.

[lexaring]

A bit strange seems that if you used the above

yt-dlp.exe --merge-output-format mp4 https://kinescope.io/NumbersOfYourLesson/master.m3u8 --referer https://kinescope.io -o "NameYourLesson"

why it was possible to download encrypted streams without an --allow-u.

Yes, I used that.

[LZAA]

Url?

[lexaring]

Url?

Any free video from nday.club/video/open
You have to be registered though and the site is in russian language.