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@missingcore/audio-metadata

v1.3.0

Published

An audio file metadata reader built for React Native.

Downloads

23

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Links

Git

Maintainers

cyanchillcyanchill

Keywords

react-nativeexpoiosandroidaudiometadata

Readme

@missingcore/audio-metadata

NPM Version License

An audio file metadata reader built primarily for React Native (mobile only) supporting tags used in MissingCore/Music.

[!NOTE]
Supports React Native's "New Architecture".

Also works in a plain Node.js environment.

Supported Files

| Extension | Format | Additional Information | | ------------- | --------------------------- | ---------------------------------------------------------------------------------------------------------- | | .flac | - FLAC | | | .mp3 | - ID3v1- ID3v2 | - Unsynchronisation supported*- Tag at end of file supported (ID3v2.4)*- All other flags ignored | | .mp4/.m4a | - MP-4 Part 14 (a.k.a. MP4) | |

* Currently untested as I have no .mp3 files that meets those conditions. Feel free to submit an issue to tell me if it works or doesn't work.

Installation

React Native

[!IMPORTANT]
Currently, this library only supports React Native 0.74.0 or Expo SDK 51 and newer due to the introduction of native atob() & btoa() support.

In the future, we may support older versions with a peer dependency of base-64.

This library supports using either expo-file-system or @dr.pogodin/react-native-fs (a more actively maintained fork of react-native-fs).

Note: Using @dr.pogodin/react-native-fs with expo requires a bare workflow.

Regardless of which file system library you use, they perform relatively the same.

With expo-file-system

npx expo install @missingcore/audio-metadata expo-file-system

With @dr.pogodin/react-native-fs

npm install @missingcore/audio-metadata @dr.pogodin/react-native-fs

Node.js

This library supports Node.js as it supplements the file system operations by using native Node.js modules.

Usage

import { getAudioMetadata } from '@missingcore/audio-metadata';

const uri = 'file:///storage/emulated/0/Music/Silence.mp3';
const wantedTags = ['album', 'albumArtist', 'artist', 'name', 'track', 'year'] as const;

// Of course with `await`, use this inside an async function or use `Promise.then()`.
const data = await getAudioMetadata(uri, wantedTags);
/*
  Returns:
    {
      fileType: 'mp3',
      format: 'ID3v2.3',
      metadata: {
          album: 'Void';
          albumArtist: 'Nothing';
          artist: 'Nothing';
          name: 'Silence';
          track: 1;
          year: 2024;
      }
    }
*/

Supported Tags

The full list of supported tags found here.

type AudioMetadata = {
  album: string;
  albumArtist: string;
  artist: string;
  artwork: string; // A base64 image string.
  name: string;
  track: number;
  year: number;
};

❗Note❗ that not all of the requested metadata may be present in the file read. In the returned metadata value, all the fields we want are "optional" (ie: its value can be undefined).

Related

License

MIT