BiliBili_DownloadFileProcessor

A naive app to process download files from BiliBili app and turns them into available mp3 automatically.

Features

• Automatically scans and processes BiliBili app download folders
• Converts .m4s files to .mp4
• Extracts audio and converts .mp4 to .mp3 using FFmpeg
• Results are named by its video title
• Supports Chinese filenames
• Simple command-line interface

Dependencies

• FFmpeg (for media conversion)
• nlohmann/json (for JSON parsing)
• C++17 or later
• CMake 3.10 or later

Only Windows is supported currently, older versions of dependencies might work but are not tested.

Installation & Build

1. Clone this repository.

   nlohmann/json is header-only and already included in the include folder. FFmpeg is not included due to its size. Please download ffmpeg.exe manually (see the link above) and place it in the ffmpeg directory. For more details, see the Usage section below.

   Or, if you prefer:

   Download the release package from the release section of this repository. All required files are included—no need to build, so you can skip step 2 below. Simply extract everything to your Bilibili download folder. For details, see the Usage section below.

2. Build with CMake:

   mkdir build
   cd build
   cmake ..
   cmake --build .

   If you already have FFmpeg installed, just copy ffmpeg.exe (and any required .dll files) to the ffmpeg directory. For details, see the Usage section below.

Usage

I strongly recommend you to see the video tutorial first: Tutorial

1. Place the executable BiliBili_DownloadFileProcessor.exe and the folder ffmpeg to the Bilibili download directory. Please ensure the ffmpeg folder contains ffmpeg.exe, and don't forget any required .dll files if there are any.
2. Run the executable file BiliBili_DownloadFileProcessor.exe, it will automatically process all relevant files in the directory. (ffmpeg.exe is dependence, must be in the same directory and don't run it.)
3. Processed mp4 and mp3 files will be output to the Result directory. (If the directory doesn't exist, it will be created automatically.)

Here is an example of the folder structure after placing the executable and ffmpeg folder:

[**video offline download folder**]
├── some_video_folder/something
├── BiliBili_DownloadFileProcessor.exe
└── ffmpeg/
    ├── ffmpeg.exe
    └── (any required .dll files if there are any)

Example Screenshot

Directory Structure

BiliBili_DownloadFileProcessor/
├── include/         # Header files
├── src/             # Source files
├── bin/             # The executables will be generated here
├── CMakeLists.txt   # Build configuration
├── README.md        # Project documentation

License

• This project uses FFmpeg (GPL-3.0 License).
• It also uses nlohmann/json (MIT License).
• All other source code in this repository is licensed under the MIT License unless otherwise specified.

Acknowledgements

• FFmpeg
• nlohmann/json

Contact

For questions or suggestions, please open an issue on GitHub.

Todo

• If there is no ffmpeg.exe found, the program should display an error message and exit gracefully.