192 lines
9.9 KiB
Markdown
192 lines
9.9 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, and there currently no public way to get those keys. Do not bother installing unless you already have keys!**
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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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# Support
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if you want help using the program, join [my discord server](https://discord.gg/5B3XVb4RRX) or use [github issues](https://github.com/Puyodead1/udemy-downloader/issues)
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# License
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All code is licensed under the MIT license
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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.
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# Requirements
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1. You would need to download `ffmpeg`, `aria2c`, `mp4decrypt` (from Bento4 SDK) and `yt-dlp` (this is installed with the other requirements). Ensure they are in the system path (typing their name in cmd should invoke them).
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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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### Setting up
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- install python 3.6+
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- install requirements: `pip install -r requirements.txt`
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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` _(this is only required if you plan to download DRM encrypted lectures)_
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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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I would rather not instruct you how to get these as its a grey area in terms of legality. I would prefer if you don't ask me for help getting these.
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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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### Start Downloading
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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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# Udemy Subscription Plans
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To download a course included in a subscription plan that you did not purchase individually, you will need to follow a few more steps to get setup.
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## Getting your cookies
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- Go to the page of the course you want to download
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- press `control` + `shift` + `i` (this may be different depending on your OS, just google how to open developer tools)
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- click the `Console` tab
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- copy and paste `document.cookie` and press enter
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- copy the text between the quotes
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## Setup token file
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- Create a file called `cookies.txt`
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- Paste the cookie into the file
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- save and close the file
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# Advanced Usage
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```
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usage: udemy_downloader [-h] -c COURSE_URL [-b BEARER_TOKEN] [-q QUALITY] [-l LANG] [-cd CONCURRENT_CONNECTIONS]
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[--skip-lectures] [--download-assets] [--download-captions] [--keep-vtt] [--skip-hls] [--info]
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[--use-h265] [--h265-crf H265_CRF] [--ffmpeg-preset FFMPEG_PRESET]
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[--ffmpeg-framerate FFMPEG_FRAMERATE] [--h265-encoder H265_ENCODER] [--disable-ipv6] [-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
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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
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'en')
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-cd CONCURRENT_CONNECTIONS, --concurrent-connections CONCURRENT_CONNECTIONS
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The number of maximum concurrent connections per download for segments (HLS and DASH, must be
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a number 1-30)
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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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--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
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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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--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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--ffmpeg-preset FFMPEG_PRESET
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Set a custom preset value for encoding. This can vary depending on the encoder
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--ffmpeg-framerate FFMPEG_FRAMERATE
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Changes the FPS used for encoding. FFMPEG default is 30
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--h265-encoder H265_ENCODER
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Changes the HEVC encder that is used. Default is copy when not using h265, otherwise the
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default is libx265
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--disable-ipv6 If specified, ipv6 will be disabled in aria2
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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 udemy_downloader -c <Course URL> -b <Bearer Token>`
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- `python udemy_downloader -c https://www.udemy.com/courses/myawesomecourse -b <Bearer Token>`
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- Download a specific quality
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- `python udemy_downloader -c <Course URL> -q 720`
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- Download assets along with lectures
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- `python udemy_downloader -c <Course URL> --download-assets`
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- Download assets and specify a quality
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- `python udemy_downloader -c <Course URL> -q 360 --download-assets`
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- Download captions (Defaults to English)
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- `python udemy_downloader -c <Course URL> --download-captions`
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- Download captions with specific language
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- `python udemy_downloader -c <Course URL> --download-captions -l en` - English subtitles
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- `python udemy_downloader -c <Course URL> --download-captions -l es` - Spanish subtitles
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- `python udemy_downloader -c <Course URL> --download-captions -l it` - Italian subtitles
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- `python udemy_downloader -c <Course URL> --download-captions -l pl` - Polish Subtitles
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- `python udemy_downloader -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 udemy_downloader -c <Course URL> --skip-lectures --download-captions` - Downloads only captions
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- `python udemy_downloader -c <Course URL> --skip-lectures --download-assets` - Downloads only assets
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- Keep .VTT caption files:
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- `python udemy_downloader -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 udemy_downloader -c <Course URL> --skip-hls`
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- Print course information only:
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- `python udemy_downloader -c <Course URL> --info`
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- Specify max number of concurrent downloads:
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- `python udemy_downloader -c <Course URL> --concurrent-downloads 20`
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- `python udemy_downloader -c <Course URL> -cd 20`
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- Encode in H.265:
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- `python udemy_downloader -c <Course URL> --use-h265`
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- Encode in H.265 with custom CRF:
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- `python udemy_downloader -c <Course URL> --use-h265 -h265-crf 20`
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- Encode in H.265 with custom preset using the default encoder (libx265):
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- `python udemy_downloader -c <Course URL> --use-h265 --h265-preset faster`
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- Encode in H.265 with custom preset using a custom encoder:
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- **Note**: _The presets may be different depending on the encoder! For example: `hevc_nvenc` default is `p4` and `libx265` is `medium`_
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- _You can view encoder help with `ffmpeg -h encoder=<encoder name>`, ex: `ffmpeg -h encoder=hevc_nvenc`_
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- `python udemy_downloader -c <Course URL> --use-h265 --h265-encoder hevc_nvenc --h265-preset p7`
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- Encode in H.265 with a custom framerate:
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- `python udemy_downloader -c <Course URL> --use-h265 --ffmpeg-framerate 24`
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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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# 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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