This github repository is for dumping my various scipts

Video Audio Extractor - Batch Processor

This Gradio application allows you to extract audio from multiple video files in a specified directory, with various options for encoding, album art embedding, and metadata tagging.

Features

• Batch Processing: Process all video files within a given input directory.
• Audio Extraction: Extract audio streams from common video formats.
• Audio Re-encoding: Optionally re-encode extracted audio to various formats (MP3, AAC, FLAC, Opus, WAV) with adjustable quality.
• Album Art Embedding:
  • Use the first frame of the video as the album cover.
  • Upload an external image file to use as the album cover.
• Metadata Tagging: Automatically set the TITLE metadata tag based on the filename, with an option to remove a specified prefix (e.g., [MapleStory BGM] ).
• Original Video Deletion: Option to delete the original video files after successful audio extraction (only works if input and output directories are the same).
• Overwrite Control: Prevent overwriting existing audio files.
• Real-time Status Updates: View processing status and logs directly in the Gradio interface.
• Audio Preview: Listen to the last extracted audio file directly in the application.

Requirements

• Python 3.x
• ffmpeg and ffprobe (must be installed and accessible in your system's PATH)
• Gradio Python library (pip install gradio)
• mutagen Python library (optional, but highly recommended for metadata tagging: pip install mutagen)

Installation

1. Install FFmpeg: Download and install ffmpeg from ffmpeg.org. Ensure that ffmpeg and ffprobe are added to your system's PATH environment variable.
2. Install Python Dependencies:

   pip install gradio mutagen
   

How to Use

1. Save the Script: Save the provided Python code as audio_toolkit.py (or any other .py file).
2. Run the Application: Open your terminal or command prompt, navigate to the directory where you saved the script, and run:

   python audio_toolkit.py
   

3. Access the Interface: A local URL (usually http://127.0.0.1:7860/) will be displayed in your terminal. Open this URL in your web browser to access the Gradio interface.
4. Configure and Process:
   • Input Directory Path: Enter the full path to the folder containing your video files. By default, it will show the script's current directory.
   • Output Directory Path (optional): Specify where you want the extracted audio files to be saved. If left empty, audio files will be saved in the same directory as the input videos.
   • Audio Encoding Options (Accordion):
     • Re-encode audio: Check this box if you want to convert the audio to a specific format and quality. If unchecked, the original audio stream will be copied (faster, but no format conversion).
     • Target Audio Format: Choose the desired output format (e.g., mp3, aac).
     • Audio Quality: Select the bitrate for compressed formats.
   • Album Art Options (Accordion):
     • Use first frame of video as album cover: If checked, the first frame of each video will be extracted and embedded as album art.
     • Upload External Cover Image: If you prefer a custom cover, upload an image file here. This option takes precedence over "Use first frame" if both are selected.
   • Metadata Options (Accordion):
     • Add metadata tags (TITLE from filename): If checked, the script will attempt to set the TITLE tag of the audio file based on its filename, removing the [MapleStory BGM] prefix if present.
     • Note: If mutagen is not installed, a warning will appear, and metadata tagging will be skipped.
   • Delete original videos after extraction: If checked, the original video files will be deleted only if the input and output directories are the same.
   • Overwrite existing audio files: If checked, any existing audio files with the same name in the output directory will be overwritten. If unchecked, they will be skipped.
   • Start Batch Processing: Click this button to begin the extraction process.
5. Monitor Status: The "Processing Status" textbox will display real-time updates and logs. The "Last Extracted Audio (Preview)" will allow you to listen to the most recently processed audio file.

Helper Functions

The script includes several helper functions:

• set_title_from_filename(audio_path): Sets the TITLE metadata tag for various audio formats.
• get_audio_codec(video_file): Retrieves the audio codec of a video file using ffprobe.
• extract_audio(...): Extracts audio from a video file, with options for re-encoding and quality.
• extract_first_frame(video_file, output_dir): Extracts the first frame of a video as a JPEG image.
• add_album_art(audio_file, image_file): Embeds an image file as album art into an audio file.
• process_videos_in_directory(...): The main function that orchestrates the batch processing of video files.

Important Notes

• FFmpeg/FFprobe: Ensure ffmpeg and ffprobe are correctly installed and in your system's PATH for the script to function.
• Mutagen: While optional, installing mutagen is necessary for the metadata tagging feature to work.
• File Paths: Use absolute paths for input and output directories to avoid issues.
• Prefix for Metadata: The script is configured to remove [MapleStory BGM] from filenames when setting the title. You can modify the PREFIX constant in the script if you have a different prefix to remove.