bun-ffmpeg

bun-ffmpeg is an audio processing library based on FFmpeg, built with Bun, designed to simplify audio encoding and processing workflows.

For now Audio Processing Only

Features

• Audio Encoding: Supports audio codecs such as aac, mp3, and pcm_s16le.
• Audio Parameters: Allows setting bitrate, channels, and sample rate.
• Stream Processing: Supports stream input and output for real-time audio data processing.

Installation

bun add bun-ffmpeg

Usage

Basic Audio Processing

Import and use the audio function to process audio files:

import { audio } from 'bun-ffmpeg'

const options = {
  codec: 'aac',
  bitrate: '192k',
  channels: 2,
  sampleRate: 44100,
  onError: error => console.error('Error processing audio:', error),
}

await audio('input.mp3', 'output.aac', options)

Stream Input

Use the audioWithStreamInput function to process audio from a readable stream:

import { audioWithStreamInput } from 'bun-ffmpeg'

const options = {
  codec: 'mp3',
  bitrate: '128k',
  channels: 2,
  sampleRate: 44100,
  onError: error => console.error('Error processing audio:', error),
}

// Example of using a ReadableStream as input
const inputStream = getReadableStreamSomehow()

await audioWithStreamInput(inputStream, 'output.mp3', options)

Stream Output

Use the audioWithStreamOut function to process audio and output to a writable stream:

import { audioWithStreamOut } from 'bun-ffmpeg'

const options = {
  codec: 'pcm_s16le',
  channels: 2,
  sampleRate: 48000,
  onError: error => console.error('Error processing audio:', error),
}

const outputHandlers = {
  onProcessDataFlushed: (data) => {
    // Handle flushed data
  },
  onProcessDataEnd: (data) => {
    // Handle end of data
  },
}

audioWithStreamOut('input.mp3', outputHandlers, options)

Stream Input and Output

Use the audioWithStreamInputAndOut function to process audio from a readable stream and output to a writable stream:

import { audioWithStreamInputAndOut } from 'bun-ffmpeg'

const options = {
  codec: 'aac',
  bitrate: '256k',
  channels: 5.1,
  sampleRate: 44100,
  onError: error => console.error('Error processing audio:', error),
}

const inputStream = getReadableStreamSomehow()

const outputHandlers = {
  onProcessDataFlushed: (data) => {
    // Handle flushed data
  },
  onProcessDataEnd: (data) => {
    // Handle end of data
  },
}

audioWithStreamInputAndOut(inputStream, outputHandlers, options)

see more examples in the audio.test.ts

Contributing

We welcome contributions to bun-ffmpeg! Whether it's feature suggestions, bug reports, or code contributions, your help is highly appreciated. Please feel free to open an issue or submit a pull request on our GitHub repository.

License

bun-ffmpeg is open-sourced software licensed under the MIT license.

Contact

Kenji - kenjiginjo@gmail.com

Project Link: https://github.com/KenjiGinjo/bun-ffmpeg