audio-batch-speedup

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A Rust library and command-line tool for batch processing and speeding up audio files using ffmpeg.

This crate was initially designed for visual novel audio speedup, as visual novels typically use a large number of OGG files for their audio system. It has since been extended to support a wider range of audio formats.

Features

• Parallel processing of multiple audio files recursively, maximizing speed by utilizing multiple CPU cores.
• Configurable speed adjustment.
• Support for multiple audio formats.
• Format detection: Prioritizes detecting audio format from file content (magic bytes) and falls back to file extension if content detection is not possible.

Usage

Command-line (bin) Usage

First, install the package. You can install it from Release manually or use cargo-binstall:

cargo binstall audio-batch-speedup

Then, run the executable:

abs --input /path/to/your/audio/folder --speed 1.5 --formats ogg,mp3     # speed up all OGG and MP3 files in /path/to/your/audio/folder by 1.5x

Arguments:

• -i, --input <INPUT>: Path to the folder containing audio files.
• -s, --speed <SPEED>: Audio speed multiplier (e.g., 1.5 for 1.5x speed).
• -f, --formats <FORMATS>: Comma-separated list of audio formats to process (e.g., ogg,mp3,wav). Use all to process all supported formats. Supported formats: ogg, mp3, wav, flac, aac, opus, alac, wma. Default: all.

Library (lib) Usage

Add audio-batch-speedup to your Cargo.toml:

[dependencies]
audio-batch-speedup = "0.1" # Use the latest version

Then, in your Rust code:

use std::path::Path;
use audio_batch_speedup::{process_audio_files, AudioFormat};

fn main() -> std::io::Result<()> {
    let folder = Path::new("path/to/your/audio/files");
    let speed = 1.5;
    // Process OGG and MP3 files
    process_audio_files(folder, speed, AudioFormat::OGG | AudioFormat::MP3)?;

    // Process all supported audio files
    process_audio_files(folder, speed, AudioFormat::ALL)?;

    Ok(())
}

Requirements

• FFmpeg must be installed and available in the system PATH.