# Udemy Downloader with DRM support
[](https://forthebadge.com)
[](https://forthebadge.com)
[](https://forthebadge.com)
[](https://forthebadge.com)
# NOTE
- **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!**
- **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!**
- 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](https://discord.gg/5B3XVb4RRX) or use [github issues](https://github.com/Puyodead1/udemy-downloader/issues)
# License
All code is licensed under the MIT license
# Description
Utility script to download Udemy courses, has support for DRM videos but requires the user to acquire the decryption key (for legal reasons).
Windows is the primary development OS, but I've made an effort to support Linux also.
# Requirements
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).
# 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 URL
- Udemy Bearer Token (aka acccess token for udemy-dl users)
### Setting up
- install python 3.6+
- install requirements: `pip install -r requirements.txt`
- rename `.env.sample` to `.env` _(you only need to do this if you plan to use the .env file to store your bearer token)_
- rename `keyfile.example.json` to `keyfile.json` _(this is only required if you plan to download DRM encrypted lectures)_
### Acquire Bearer Token
- Firefox: [Udemy-DL Guide](https://github.com/r0oth3x49/udemy-dl/issues/389#issuecomment-491903900)
- Chrome: [Udemy-DL Guide](https://github.com/r0oth3x49/udemy-dl/issues/389#issuecomment-492569372)
- If you want to use the .env file to store your Bearer Token, edit the .env and add your token.
### Key ID and Key
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.
- Enter the key and key id in the `keyfile.json`
- 
- 
### Start Downloading
You can now run the program, see the examples below. The course will download to `out_dir`.
# Udemy Subscription Plans
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.
## Getting your cookies
- Go to the page of the course you want to download
- press `control` + `shift` + `i` (this may be different depending on your OS, just google how to open developer tools)
- click the `Console` tab
- copy and paste `document.cookie` and press enter
- copy the text between the quotes
## Setup token file
- Create a file called `cookies.txt`
- Paste the cookie into the file
- save and close the file
# Advanced Usage
```
usage: udemy_downloader [-h] -c COURSE_URL [-b BEARER_TOKEN] [-q QUALITY] [-l LANG] [-cd CONCURRENT_CONNECTIONS]
[--skip-lectures] [--download-assets] [--download-captions] [--keep-vtt] [--skip-hls] [--info]
[--use-h265] [--h265-crf H265_CRF] [--ffmpeg-preset FFMPEG_PRESET]
[--ffmpeg-framerate FFMPEG_FRAMERATE] [--h265-encoder H265_ENCODER] [--disable-ipv6] [-v]
Udemy Downloader
options:
-h, --help show this help message and exit
-c COURSE_URL, --course-url COURSE_URL
The URL of the course to download
-b BEARER_TOKEN, --bearer BEARER_TOKEN
The Bearer token to use
-q QUALITY, --quality QUALITY
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
-l LANG, --lang LANG The language to download for captions, specify 'all' to download all captions (Default is
'en')
-cd CONCURRENT_CONNECTIONS, --concurrent-connections CONCURRENT_CONNECTIONS
The number of maximum concurrent connections per download for segments (HLS and DASH, must be
a number 1-30)
--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
--keep-vtt If specified, .vtt files won't be removed
--skip-hls If specified, hls streams will be skipped (faster fetching) (hls streams usually contain 1080p
quality for non-drm lectures)
--info If specified, only course information will be printed, nothing will be downloaded
--use-h265 If specified, videos will be encoded with the H.265 codec
--h265-crf H265_CRF Set a custom CRF value for H.265 encoding. FFMPEG default is 28
--ffmpeg-preset FFMPEG_PRESET
Set a custom preset value for encoding. This can vary depending on the encoder
--ffmpeg-framerate FFMPEG_FRAMERATE
Changes the FPS used for encoding. FFMPEG default is 30
--h265-encoder H265_ENCODER
Changes the HEVC encder that is used. Default is copy when not using h265, otherwise the
default is libx265
--disable-ipv6 If specified, ipv6 will be disabled in aria2
-v, --version show program's version number and exit
```
- Passing a Bearer Token and Course ID as an argument
- `python udemy_downloader -c -b `
- `python udemy_downloader -c https://www.udemy.com/courses/myawesomecourse -b `
- Download a specific quality
- `python udemy_downloader -c -q 720`
- Download assets along with lectures
- `python udemy_downloader -c --download-assets`
- Download assets and specify a quality
- `python udemy_downloader -c -q 360 --download-assets`
- Download captions (Defaults to English)
- `python udemy_downloader -c --download-captions`
- Download captions with specific language
- `python udemy_downloader -c --download-captions -l en` - English subtitles
- `python udemy_downloader -c --download-captions -l es` - Spanish subtitles
- `python udemy_downloader -c --download-captions -l it` - Italian subtitles
- `python udemy_downloader -c --download-captions -l pl` - Polish Subtitles
- `python udemy_downloader -c --download-captions -l all` - Downloads all subtitles
- etc
- Skip downloading lecture videos
- `python udemy_downloader -c --skip-lectures --download-captions` - Downloads only captions
- `python udemy_downloader -c --skip-lectures --download-assets` - Downloads only assets
- Keep .VTT caption files:
- `python udemy_downloader -c --download-captions --keep-vtt`
- Skip parsing HLS Streams (HLS streams usually contain 1080p quality for Non-DRM lectures):
- `python udemy_downloader -c --skip-hls`
- Print course information only:
- `python udemy_downloader -c --info`
- Specify max number of concurrent downloads:
- `python udemy_downloader -c --concurrent-downloads 20`
- `python udemy_downloader -c -cd 20`
- Encode in H.265:
- `python udemy_downloader -c --use-h265`
- Encode in H.265 with custom CRF:
- `python udemy_downloader -c --use-h265 -h265-crf 20`
- Encode in H.265 with custom preset using the default encoder (libx265):
- `python udemy_downloader -c --use-h265 --h265-preset faster`
- Encode in H.265 with custom preset using a custom encoder:
- **Note**: _The presets may be different depending on the encoder! For example: `hevc_nvenc` default is `p4` and `libx265` is `medium`_
- _You can view encoder help with `ffmpeg -h encoder=`, ex: `ffmpeg -h encoder=hevc_nvenc`_
- `python udemy_downloader -c --use-h265 --h265-encoder hevc_nvenc --h265-preset p7`
- Encode in H.265 with a custom framerate:
- `python udemy_downloader -c --use-h265 --ffmpeg-framerate 24`
If you encounter errors while downloading such as
`errorCode=1 Network problem has occurred. cause:Unknown socket error 10051 (0x2743)`
or
`errorCode=1 Network problem has occurred. cause:A socket operation was attempted to an unreachable network.`
Then try disabling ipv6 in aria2 using the `--disable-ipv6` option
# 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
- https://github.com/r0oth3x49/udemy-dl - For some of the informaton related to using the udemy api