This is a plugin for yt-dlp that enables decryption of encrypted audio and video files using the mp4decrypt command-line tool. The files will be decrypted instantly after download and will replace the encrypted files.

Prerequisites

Before using this plugin, ensure that you have the mp4decrypt executable added to your system's PATH. You can download the mp4decrypt tool from the Bento4 website and follow their installation instructions.

Installation

You can install this plugin directly from the GitHub repository using the following command:

python -m pip install -U https://github.com/pratikpatel8982/yt-dlp-mp4decrypt/archive/master.zip

Make sure you have Python 3.6+ installed before running this command.

BUGS

Don't use the + operator when specifying format in -f "wv+wa". Use , instead like this -f "wv,wa".

Usage

To use this plugin, make sure you place the --use-postprocessor option before any other arguments to avoid any issues. Here are the correct usage instructions:

Decrypt using a single decryption_key:

yt-dlp --use-postprocessor MP4Decrypt:decryption_key=your_key <video_url>

Replace your_key with your actual decryption key in the format kid:key.

Decrypt using keys from keys.txt(Useful when downloading a Playlist):

yt-dlp --use-postprocessor MP4Decrypt:keyfile="/path/to/keys.txt" <video_url or playlist_url>

Replace /path/to/keys.txt with the actual path to your keys.txt file. Make sure keys.txt contains keys in the format kid:key, one per line. mp4decrypt will automatically decrypt the file using the correct keys from keys.txt

keys.txt Sample:

If you're decrypting using keys from a file, the keys.txt file should contain keys in the format kid:key, with each key on a separate line. Here's a sample keys.txt file:

kid1:key1
kid2:key2
kid3:key3
kid4:key4
kid5:key5