promise-audioconcat

Concatenates multiple audio files using ffmpeg.

promise-audioconcat provides a programmatic interface to do basically the same as calling ffmpeg via CLI like:

ffmpeg -i "concat:audio1.mp3|audio2.mp3" -acodec copy out.mp3

Install

npm install promise-audioconcat

Usage

TypeScript

import audioconcat from 'promise-audioconcat';

JavaScript

const audioconcat = require('promise-audioconcat');

API

audioconcat(inputs: string[], output: string): Promise<void>

• inputs: an array of the filenames of the audio files to concatenate
• output: the filename of the output file

Note: The output file will be overwritten if it exists.

const songs = [
  'introduction.mp3',
  'recording.mp3',
];

const output = 'combined.mp3';

try {
  await audioconcat(songs, output);
  console.log(`Audio created in ${output}`);
} catch (err) {
  console.error('Error:', err);
  console.error('ffmpeg stderr:', err.stderr);
}

See also

• audioconcat - The package that inspired this one
• fluent-ffmpeg - The underlying ffmpeg library
• @ffmpeg-installer/ffmpeg - Provides the required ffmpeg binaries