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  1. Hello!

    I wanted to download some lectures from the ArtStation.com, but all I can see is a sequence of .m4f files.

    Have not any idea what to do with them...

    Details: ArtStation opens free access to all lectures until the end of the year. I wanted to download some, but stucked with described trouble.

    You can see an example of lecture here:
    https://www.artstation.com/learning/courses/6yR/compositing-in-photoshop/chapters/yyN/...toshop-part-01

    Any ideas how I could download these lectures?
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  2. Member
    Join Date
    Nov 2015
    Location
    Campuchia - Sapoche
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    get mpd from this video .

    Code:
    https://content-aaps1.uplynk.com/preplay2/2a74762d317e4371a474832f1bc2ec3f/2f1ba71f3e1d112c1908f4dcf4076cbc/F5IV7xnUjGhyCTNa090Pu5TvRIcLjtWjLIFAoiz8UvV.mpd?pbs=86c812f3c3f64d86bdd386df926f4e6f
    Use "yt-dlp" or "N_m3u8DL" to download video with mpd above

    Used WidevineDecryptoron to get the key

    Code:
    Found key: a86a7ad76593caf07f3ad70dd20d5c12 (KID=181b33e18eb94e638e3d3a98f206da08)
    Use mp4decrypt to decrypt video and audio

    See this thread --> https://forum.videohelp.com/threads/400863-Downloading-encrypted-mpd-video-files
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  3. I also was interested in this, and following the info in this post and the post you linked to (as well as other posts) I have been able to get the encripted files, and was able to decrypt the video file, the audio was trickier to do, as the key seems to change much more frequently, so by the time the video is downloaded the audio key changes. The easy fix is to just reload the page, and hit play again and copy out the one key thats different of the 3, that should be the new audio key.

    ----

    Used the Chrome extension Widevine L3 Decryptor (download that repository, unzip, open Chrome go to chrome://extensions/, hit the "Developer mode" toggle, drag and drop the unziped directory to the chrome window).

    I also had to replace the Widevine DLL's (close Chrome first) then go to
    Code:
    C:\Program Files\Google\Chrome\Application\<Your Chrome Version number>\WidevineCdm\_platform_specific\win_x64
    with the ones from this site (Or use an older version of Chrome.)

    I downloaded YT-DLP and placed it in
    Code:
    C:\Program Files\YT-DLP
    and then added that folder to the Path (this page will tell you how to do it visualy if you need)

    I downloaded mp4decrypt and placed it in
    Code:
    C:\Program Files\Bento4
    and then added
    Code:
    C:\Program Files\Bento4\bin
    to the Path

    ---

    I then used Chrome to go to the video tutorials page. Loaded up the video and ran the developer tools. In the "Console" tab I get 3 WidevineDecryptor Keys.

    In the "Network" tab I search for ".mpd" and then right click on it and select
    Code:
    Copy/Copy link address
    and then run the following in comand prompt

    Code:
    yt-dlp --allow-unplayable-formats "pasted link goes here"
    The files will now have downloaded, I rename them ]video.mp4 and audio.m4a

    It is now a good idea to refresh the page in Chrome, hit play on the video, and copy out the first key (the audio one) as it has likely changed since downloading the files.

    I can then use mp4decrypt with one of the keys (seems to always be the 3rd one for video, and 1st one when I refreshed the page for audio) I got from the console in a previous step and it decrypts and can be opened and watched in VLC.
    Code:
    mp4decrypt --key <KID>:<Key> video.mp4 video_decrpted.mp4

    Here is an example of the decrypt comand:

    Code:
    mp4decrypt --key 7bf1353ce6744875910facc49da8a6c6:a779ee973a46ad8b738adeffa9f5fa0b  audio.m4a audio_decrpted.m4a
    If you also want subtitles, in Chrome/Dev Tools/ Network tab search for .srt, and then right click and open in new tab, this should download the subtitles for you.

    Last step I use MKVtoolnixGUI to join the audio, video and subtitles together into an MKV
    Last edited by filiko-floro; 5th May 2021 at 22:58.
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  4. @therain @filiko-floro

    Is there any way I can achieve this on Mac? Apparently yt-dlp isn't available for download on Mac.
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  5. Member
    Join Date
    Feb 2006
    Location
    United States
    Search Comp PM
    Originally Posted by Jules View Post
    @therain @filiko-floro

    Is there any way I can achieve this on Mac? Apparently yt-dlp isn't available for download on Mac.
    should work on mac, see under installation - https://github.com/yt-dlp/yt-dlp
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  6. Member
    Join Date
    Jan 2019
    Location
    hawai
    Search PM
    forget poor mac and buy win pc...
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  7. Originally Posted by october262 View Post
    should work on mac, see under installation - https://github.com/yt-dlp/yt-dlp
    Ok, will try this soon, thank you tonnes!

    Originally Posted by lomero View Post
    forget poor mac and buy win pc...
    Oh I am planning to do it this year, you have no idea. I am not liking the new OS updates.
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