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211 lines
12 KiB
Markdown
211 lines
12 KiB
Markdown
# Udemy Downloader with DRM support
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[](https://forthebadge.com)
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[](https://forthebadge.com)
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[](https://forthebadge.com)
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[](https://forthebadge.com)
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# NOTE
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- **This tool will not work without decryption keys. Do not bother installing unless you already have keys or can obtain them!**
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- **Downloading courses is against Udemy's Terms of Service, I am NOT held responsible for your account getting suspended as a result from the use of this program!**
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- 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.
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# Description
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Utility script to download Udemy courses, has support for DRM videos but requires the user to acquire the decryption key (for legal reasons).<br>
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Windows is the primary development OS, but I've made an effort to support Linux also (Mac untested).
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# Requirements
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The following are a list of required third-party tools, you will need to ensure they are in your systems path and that typing their name in a terminal invokes them.
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_**Note**:_ _These are seperate requirements that are not installed with the pip command! You will need to download and install these manually!_
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- [ffmpeg](https://www.ffmpeg.org/) - This tool is also available in Linux package repositories
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- [aria2/aria2c](https://github.com/aria2/aria2/) - This tool is also available in Linux package repositories
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- [shaka-packager](https://github.com/shaka-project/shaka-packager/releases/latest)
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- [yt-dlp](https://github.com/yt-dlp/yt-dlp/) - This tool is also available in Linux package repositories, but can also be installed using pip if desired (`pip install yt-dlp`)
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# Usage
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_quick and dirty how-to_
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You will need to get a few things before you can use this program:
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- Decryption Key ID
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- Decryption Key
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- Udemy Course URL
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- Udemy Bearer Token (aka acccess token for udemy-dl users)
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- Udemy cookies (only required for subscription plans - see [Udemy Subscription Plans](#udemy-subscription-plans))
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## Setting up
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- rename `.env.sample` to `.env` _(you only need to do this if you plan to use the .env file to store your bearer token)_
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- rename `keyfile.example.json` to `keyfile.json`
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## Acquire Bearer Token
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- Firefox: [Udemy-DL Guide](https://github.com/r0oth3x49/udemy-dl/issues/389#issuecomment-491903900)
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- Chrome: [Udemy-DL Guide](https://github.com/r0oth3x49/udemy-dl/issues/389#issuecomment-492569372)
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- If you want to use the .env file to store your Bearer Token, edit the .env and add your token.
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## Key ID and Key
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It is up to you to acquire the key and key ID. Please **DO NOT** ask me for help acquiring these, decrypting DRM protected content can be considered piracy. The tool required for this has already been discused in a GitHub issue.
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- Enter the key and key id in the `keyfile.json`
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- 
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- 
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## Cookies
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To download a course included in a subscription plan that you did not purchase individually, you will need to use cookies. You can also use cookies as an alternative to Bearer Tokens.
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The program can automatically extract them from your browser. You can specify what browser to extract cookies from with the `--browser` argument. Supported browsers are:
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- chrome
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- firefox
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- opera
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- edge
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- brave
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- chromium
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- vivaldi
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- safari
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## Ready to go
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You can now run the program, see the examples below. The course will download to `out_dir`.
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# Advanced Usage
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```
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usage: main.py [-h] -c COURSE_URL [-b BEARER_TOKEN] [-q QUALITY] [-l LANG] [-cd CONCURRENT_DOWNLOADS] [--disable-ipv6] [--skip-lectures] [--download-assets] [--download-captions] [--download-quizzes]
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[--keep-vtt] [--skip-hls] [--info] [--id-as-course-name] [-sc] [--save-to-file] [--load-from-file] [--log-level LOG_LEVEL] [--browser {chrome,firefox,opera,edge,brave,chromium,vivaldi,safari}]
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[--use-h265] [--h265-crf H265_CRF] [--h265-preset H265_PRESET] [--use-nvenc] [-v]
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Udemy Downloader
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options:
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-h, --help show this help message and exit
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-c COURSE_URL, --course-url COURSE_URL
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The URL of the course to download
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-b BEARER_TOKEN, --bearer BEARER_TOKEN
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The Bearer token to use
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-q QUALITY, --quality QUALITY
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Download specific video quality. If the requested quality isn't available, the closest quality will be used. If not specified, the best quality will be downloaded for each lecture
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-l LANG, --lang LANG The language to download for captions, specify 'all' to download all captions (Default is 'en')
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-cd CONCURRENT_DOWNLOADS, --concurrent-downloads CONCURRENT_DOWNLOADS
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The number of maximum concurrent downloads for segments (HLS and DASH, must be a number 1-30)
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--disable-ipv6 If specified, ipv6 will be disabled in aria2
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--skip-lectures If specified, lectures won't be downloaded
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--download-assets If specified, lecture assets will be downloaded
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--download-captions If specified, captions will be downloaded
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--download-quizzes If specified, quizzes will be downloaded
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--keep-vtt If specified, .vtt files won't be removed
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--skip-hls If specified, hls streams will be skipped (faster fetching) (hls streams usually contain 1080p quality for non-drm lectures)
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--info If specified, only course information will be printed, nothing will be downloaded
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--id-as-course-name If specified, the course id will be used in place of the course name for the output directory. This is a 'hack' to reduce the path length
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-sc, --subscription-course
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Mark the course as a subscription based course, use this if you are having problems with the program auto detecting it
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--save-to-file If specified, course content will be saved to a file that can be loaded later with --load-from-file, this can reduce processing time (Note that asset links expire after a certain
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amount of time)
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--load-from-file If specified, course content will be loaded from a previously saved file with --save-to-file, this can reduce processing time (Note that asset links expire after a certain amount of
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time)
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--log-level LOG_LEVEL
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Logging level: one of DEBUG, INFO, ERROR, WARNING, CRITICAL (Default is INFO)
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--browser {chrome,firefox,opera,edge,brave,chromium,vivaldi,safari}
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The browser to extract cookies from
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--use-h265 If specified, videos will be encoded with the H.265 codec
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--h265-crf H265_CRF Set a custom CRF value for H.265 encoding. FFMPEG default is 28
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--h265-preset H265_PRESET
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Set a custom preset value for H.265 encoding. FFMPEG default is medium
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--use-nvenc Whether to use the NVIDIA hardware transcoding for H.265. Only works if you have a supported NVIDIA GPU and ffmpeg with nvenc support
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-v, --version show program's version number and exit
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```
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- Passing a Bearer Token and Course ID as an argument
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- `python main.py -c <Course URL> -b <Bearer Token>`
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- `python main.py -c https://www.udemy.com/courses/myawesomecourse -b <Bearer Token>`
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- Download a specific quality
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- `python main.py -c <Course URL> -q 720`
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- Download assets along with lectures
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- `python main.py -c <Course URL> --download-assets`
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- Download assets and specify a quality
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- `python main.py -c <Course URL> -q 360 --download-assets`
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- Download captions (Defaults to English)
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- `python main.py -c <Course URL> --download-captions`
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- Download captions with specific language
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- `python main.py -c <Course URL> --download-captions -l en` - English subtitles
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- `python main.py -c <Course URL> --download-captions -l es` - Spanish subtitles
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- `python main.py -c <Course URL> --download-captions -l it` - Italian subtitles
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- `python main.py -c <Course URL> --download-captions -l pl` - Polish Subtitles
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- `python main.py -c <Course URL> --download-captions -l all` - Downloads all subtitles
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- etc
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- Skip downloading lecture videos
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- `python main.py -c <Course URL> --skip-lectures --download-captions` - Downloads only captions
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- `python main.py -c <Course URL> --skip-lectures --download-assets` - Downloads only assets
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- Keep .VTT caption files:
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- `python main.py -c <Course URL> --download-captions --keep-vtt`
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- Skip parsing HLS Streams (HLS streams usually contain 1080p quality for Non-DRM lectures):
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- `python main.py -c <Course URL> --skip-hls`
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- Print course information only:
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- `python main.py -c <Course URL> --info`
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- Specify max number of concurrent downloads:
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- `python main.py -c <Course URL> --concurrent-downloads 20`
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- `python main.py -c <Course URL> -cd 20`
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- Cache course information:
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- `python main.py -c <Course URL> --save-to-file`
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- Load course cache:
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- `python main.py -c <Course URL> --load-from-file`
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- Change logging level:
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- `python main.py -c <Course URL> --log-level DEBUG`
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- `python main.py -c <Course URL> --log-level WARNING`
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- `python main.py -c <Course URL> --log-level INFO`
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- `python main.py -c <Course URL> --log-level CRITICAL`
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- Use course ID as the course name:
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- `python main.py -c <Course URL> --id-as-course-name`
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- Encode in H.265:
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- `python main.py -c <Course URL> --use-h265`
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- Encode in H.265 with custom CRF:
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- `python main.py -c <Course URL> --use-h265 -h265-crf 20`
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- Encode in H.265 with custom preset:
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- `python main.py -c <Course URL> --use-h265 --h265-preset faster`
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- Encode in H.265 using NVIDIA hardware transcoding:
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- `python main.py -c <Course URL> --use-h265 --use-nvenc`
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If you encounter errors while downloading such as
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`errorCode=1 Network problem has occurred. cause:Unknown socket error 10051 (0x2743)`
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or
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`errorCode=1 Network problem has occurred. cause:A socket operation was attempted to an unreachable network.`
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Then try disabling ipv6 in aria2 using the `--disable-ipv6` option
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# Support
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if you want help using the program, join my [Discord](https://discord.gg/tMzrSxQ) server or use [GitHub Issues](https://github.com/Puyodead1/udemy-downloader/issues)
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# Credits
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- https://github.com/Jayapraveen/Drm-Dash-stream-downloader - For the original code which this is based on
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- https://github.com/alastairmccormack/pywvpssh - For code related to PSSH extraction
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- https://github.com/alastairmccormack/pymp4parse - For code related to mp4 box parsing (used by pywvpssh)
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- https://github.com/lbrayner/vtt-to-srt - For code related to converting subtitles from vtt to srt format
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- https://github.com/r0oth3x49/udemy-dl - For some of the informaton related to using the udemy api
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## License
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All code is licensed under the MIT license
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## and finally, donations!
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Woo, you made it this far!
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I spend a lot of time coding things, and almost all of them are for nothing in return. When theres a lot of use of a program I make, I try to keep it updated, fix bugs, and even implement new features! But after a while, I do run out of motivation to keep doing it. If you like my work, and can help me out even a little, it would really help me out. If you are interested, you can find all the available options [here](https://github.com/Puyodead1/#supporting-me). Even if you don't, thank you anyways!
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