React-native library that allows performing some advanced operation on audios and videos

Usage no npm install needed!

<script type="module">
  import reactNativeAudioVideoTools from '';



React-native-audio-video-tools is a set of functions that allow you to easily perform some advanced audio and video manipulations such as cutting, extraction, compressing, etc.

Behind the scene, react-native-audio-video-tools uses FFmpeg to execute commands.


Both local and remote media are handled and it's possible to perform the following operations:

  • Audio
    • File information
    • Compression
    • Trimming
    • Conversion
    • Volume adjusting
  • Video
    • File information
    • Compression
    • Trimming
    • Conversion
    • Extraction of audio sound from video

An Example app is available with almost all features implemented. You can build it in local or you can download APK for android here


Using Yarn

yarn add react-native-audio-video-tools

Using Npm

npm install react-native-audio-video-tools --save

Then you need to install react-native-ffmpeg and choose one of eight different packages available.

Linking (for React Native <= 0.59 only)

Note: If you are using react-native version 0.60 or higher you don't need to link this package.

react-native link react-native-audio-video-tools

Manual installation


  1. In XCode, in the project navigator, right click LibrariesAdd Files to [your project's name]
  2. Go to node_modulesreact-native-audio-video-tools and add RNAudioVideoTools.xcodeproj
  3. In XCode, in the project navigator, select your project. Add libRNAudioVideoTools.a to your project's Build PhasesLink Binary With Libraries
  4. Run your project (Cmd+R)<


  1. Open up android/app/src/main/java/[...]/
  • Add import com.reactlibrary.RNAudioVideoToolsPackage; to the imports at the top of the file
  • Add new RNAudioVideoToolsPackage() to the list returned by the getPackages() method
  1. Append the following lines to android/settings.gradle:
    include ':react-native-audio-video-tools'
    project(':react-native-audio-video-tools').projectDir = new File(rootProject.projectDir, 	'../node_modules/react-native-audio-video-tools/android')
  2. Insert the following lines inside the dependencies block in android/app/build.gradle:
      compile project(':react-native-audio-video-tools')


import {VideoTools} from 'react-native-audio-video-tools';

// Initialize a video tool
const videoTools = new VideoTools("");

// Get details about the video
videoTools.getDetails().then(details => {
    console.log("Size: " + details.size);
    console.log("Duration: " + details.duration);
    // Etc.


This package exposes 2 main class: AudioTools and VideoTools. They are instantiated with a path that can be local or remote.

Note: Local path should be a full one with file protocol (file://)

import {AudioTools, VideoTools} from 'react-native-audio-video-tools';

// Initialize with a remote url
const videoTools = new VideoTools("");

// Or initialize with a local url
const audioTools = new AudioTools("file:///storage/emulated/0/Download/my-music.mp3");

// Or use a picker and pass directly the returned path 
// but you should make that the returned path is the full path with file protocol
try {
    const res = await ImagePicker.openPicker({
        mediaType: type,
    const videoTools = new VideoTools(res.path);
} catch (err) {}

Here's a full list of available methods of these classes

1. Methods available on both AudioTools and VideoTools

getDetails(force: boolean): Promise

Return details about the current media.

By default the result of the operation is cached so the next execution will be almost synchronous. However, you can force re-executing by setting force parameter to true


force: boolean(optional, default to false)

Set it to true to disabled cache.


The promise returns a MediaDetails that contains:

  • size: number; The total length of the media in bytes
  • width: number; The width of video (Video only)
  • height: number; The height of video (Video only)
  • filename: string; The filename without extension
  • extension: string;
  • isRemoteMedia: null | boolean; Indicate whether the media is remote or local
  • format: string;
  • path: string; Full path of media
  • duration: number; The total duration of media in milliseconds
  • startTime: number;
  • bitrate: number;
  • metadata: [string, string];
  • streams: StreamInformation[];
  • rawInformation: string;

compress(options): Promise<MediaDefaultResponse>


An object that represents compression's specification. It contains:

- quality: low | medium | high (optional, default to medium)
- bitrate: string (optional)
- speed: slow | normal | fast (Video only) (optional, default to normal)

Note: The higher the speed, the less effective the compression is and can in some cases lead to an opposite effect.

- MediaDefaultParameters's property

Example with Big Bunny video

import {VideoTools} from 'react-native-audio-video-tools';

// Input file size ~ 9.75 MB
const videoTools = new VideoTools("");

// Output file size ~ 1.63 MB
await videoTools.compress({quality: 'low'});

// Output file size ~ 3.49 MB
await videoTools.compress();

// Output file size ~ 7.76 MB
await videoTools.compress({quality: 'high'});

You can make further test with example app.

cut(options): Promise<MediaDefaultResponse>


An object with the following properties:

- from: string Format hh:mm:ss

The time at which the media cut-off will begin

- to: string Format hh:mm:ss

The time when the media cut-off will stop

- outputFilePath: string (See outputFilePath of MediaDefaultParameters)

convertTo(options): Promise<MediaDefaultResponse>

Convert the media to another extension


An object with the following properties:

- extension: string

The new extension to obtain

- outputFilePath: string (See outputFilePath of MediaDefaultParameters)

setMediaFullPath(mediaFullPath: string): Void

Update the current media path


- mediaFullPath: string

The new local or remote path

isInputFileCorrect(): Promise

Check if the current media is correct it means processable


The promise returns an object with following properties:

- isCorrect: boolean

Indicate whether the media is correct or not

- message: string

Contains error message when the media is incorrect

2. Only AudioTools

adjustVolume(options): Promise<MediaDefaultResponse>

Adjust the volume of audio by either increasing or decreasing it by the value of rate (given in option parameter)


An object with the following properties:

- rate: number

Any number (including decimals) greater than zero

- MediaDefaultParameters's property
import {AudioTools} from 'react-native-audio-video-tools';

// Initialize with a remote url
const audioTools = new AudioTools("");

// Will create a new file with volume decreased by 50% percent of its original file
await audioTools.adjustVolume({rate: 0.5});

3. Only VideoTools

extractAudio(options): Promise<MediaDefaultResponse>

Extract audio from video

Input see MediaDefaultParameters

Note By default, mp3 is used as extension

import {VideoTools} from 'react-native-audio-video-tools';

const videoTools = new VideoTools("");

try {
    const result = await videoTools.extractAudio();
    const extractedAudio = new AudioTools(result.outputFilePath);
    const mediaDetails = await extractedAudio.getDetails();
    console.log(mediaDetails.extension); // mp3
} catch (e) {}

4. Others


Default parameters shared with some methods. It contains:

- outputFilePath: string

The location where the resulting media will be saved.

  • On iOs This option is required and it should be a full path.

  • On Android This option is optional

    When it's not defined, a generic one will be use.

- extension: string Format .extention or extension (optional, Android only)

When it's set, it represents the extension of the generated output file.

Note If both outputFilePath and extension are given, only outputFilePath would be considered


Default promise result shared with some methods. It contains:

- rc: number

The status of the request which is 0 if everything went fine

- outputFilePath: string

The full path of the media created


Feel free to submit issues or pull requests.


The library is released under the MIT licence. For more information see LICENSE.