Udemy Downloader with DRM support

NOTE

This program is WIP, the code is provided as-is and I am not held resposible for any legal issues resulting from the use of this program.

Support

if you want help using the program, join my discord server or use github issues

License

All code is licensed under the MIT license

Description

Simple program to download a Udemy course, has support for DRM videos but requires the user to aquire the decryption key (for legal reasons).
Current only Windows is supported but with some small modifications it should work on linux also (and maybe mac)

Requirements

1. You would need to download ffmpeg and mp4decrypterfrom Bento4 SDK and ensure they are in path (typing their name in cmd invokes them).

Usage

quick and dirty how-to

You will need to get a few things before you can use this program:

• Decryption Key ID
• Decryption Key
• Udemy Course ID
• Udemy Bearer Token

Setting up

• rename .env.sample to .env
• rename keyfile.example.json to keyfile.json

Aquire bearer token

• open dev tools
• go to network tab
• in the search field, enter api-2.0/courses
• 
• click a random request
• locate the Request Headers section
• copy the the text after Authorization, it should look like Bearer xxxxxxxxxxx
• 
• enter this in the .env file after UDEMY_BEARER= (you can also pass this as an argument, see advanced usage for more information)

Aquire Course ID

• Follow above before following this
• locate the request url field
• 
• copy the number after /api-2.0/courses/ as seen highlighed in the above picture
• enter this in the .env file after UDEMY_COURSE_ID= (you can also pass this as an argument, see advanced usage for more information)

Key ID and Key

It is up to you to aquire the key and key id.

• Enter the key and key id in the keyfile.json
• 
• 

Start Downloading

You can now run python main.py to start downloading. The course will download to out_dir, chapters are seperated into folders.

Advanced Usage

usage: main.py [-h] [-d] [-b BEARER_TOKEN] [-c COURSE_ID] [-q QUALITY] [-l LANG] [--skip-lectures] [--download-assets] [--download-captions]

Udemy Downloader

optional arguments:
  -h, --help            show this help message and exit
  -d, --debug           Use test_data.json rather than fetch from the udemy api.
  -b BEARER_TOKEN, --bearer BEARER_TOKEN
                        The Bearer token to use
  -c COURSE_ID, --course-id COURSE_ID
                        The ID of the course to download
  -q QUALITY, --quality QUALITY
                        Download specific video quality. (144, 360, 480, 720, 1080)
  -l LANG, --lang LANG  The language to download for captions (Default is en)
  --skip-lectures       If specified, lectures won't be downloaded.
  --download-assets     If specified, lecture assets will be downloaded.
  --download-captions   If specified, captions will be downloaded.

• Passing a Bearer Token and Course ID as an argument
  • python main.py -b <Bearer Token> -c <Course ID>
• Download a specific quality
  • python main.py -q 720
• Download assets along with lectures
  • python main.py --download-assets
• Download assets and specify a quality
  • python main.py -q 360 --download-assets
• Download captions (Defaults to English)
  • python main.py --download-captions
• Download captions with specific language
  • python main.py --download-captions -l en - English subtitles
  • python main.py --download-captions -l es - Spanish subtitles
  • python main.py --download-captions -l it - Italian subtitles
  • python main.py --download-captions -l pl - Polish Subtitles
  • python main.py --download-captions -l all - Downloads all subtitles
  • etc
• Skip downloading lecture videos
  • python main.py --skip-lectures --download-captions - Downloads only captions
  • python main.py --skip-lectures --download-assets - Downloads only assets

Getting an error about "Accepting the latest terms of service"?

• If you are using Udemy business, you must edit main.py and change udemy.com to <portal name>.udemy.com

Credits

• https://github.com/Jayapraveen/Drm-Dash-stream-downloader - For the original code which this is based on
• https://github.com/alastairmccormack/pywvpssh - For code related to PSSH extraction
• https://github.com/alastairmccormack/pymp4parse/ - For code related to mp4 box parsing (used by pywvpssh)
• https://github.com/lbrayner/vtt-to-srt - For code related to converting subtitles from vtt to srt format