bensonruan / webcam-easy

javascript access webcam stream and take photo

Webcam Easy JS

This is a javascript library for accessing webcam stream and taking photos.

You can easily add it as a module to your own app.

• Streaming webcam on desktop computer or mobile
• Switch back or front cameras on mobile
• Take pictures and be able to download.

Live Demo

https://bensonruan.com/how-to-access-webcam-and-take-photo-with-javascript/

Installation

Use Git Clone

git https://github.com/bensonruan/webcam-easy.git

OR Use NPM

npm install webcam-easy

Usage

1. Include script tag in html

<script type="text/javascript" src="https://unpkg.com/webcam-easy/dist/webcam-easy.min.js"></script>

or Import into javascript

import Webcam from 'webcam-easy';

2. Place elements in HTML

<video id="webcam" autoplay playsinline width="640" height="480"></video>
<canvas id="canvas" class="d-none"></canvas>
<audio id="snapSound" src="audio/snap.wav" preload = "auto"></audio>

3. Call constructor in javascript

const webcamElement = document.getElementById('webcam');
const canvasElement = document.getElementById('canvas');
const snapSoundElement = document.getElementById('snapSound');
const webcam = new Webcam(webcamElement, 'user', canvasElement, snapSoundElement);

4. Start Webcam

webcam.start()
   .then(result =>{
      console.log("webcam started");
   })
   .catch(err => {
       console.log(err);
   });

5. Take Photo

var picture = webcam.snap();

6. Stop Webcam

webcam.stop();

Functions

• start(startStream) : start streaming webcam

  • get permission from user
  • get all video input devices info
  • select camera based on facingMode
  • start stream

  startStream is optional parameter, default value is true

• stop() : stop streaming webcam

• stream() : start streaming webcam to video element

• snap() : take photo from webcam

• flip() : change Facing mode and selected camera

Properties

• facingMode : 'user' or 'enviroment'
• webcamList : all available camera device
• webcamCount : number of available camera device

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