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How to Implement Video Call Background

How to Implement Video Call Background

Who has never used a video call background? Whether attending a business meeting, keeping up with friends and family, or simply connecting with someone online, video calls are the new way to communicate. This article will discuss implementing a background for video calls using ZEGOCLOUD video call SDK.

How to Implement Background for Video Calls

The ZEGOCLOUD Express-Video SDK is a tool that allows developers to easily add video calling and live video streaming functionality to a range of applications, including features like video call backgrounds. This functionality can be used for various purposes, such as one-on-one and group video calls, online education, entertainment, live streaming, and more.

There are several benefits to using ZEGOCLOUD’s Express Video SDK in your video call applications. Some of the standout advantages include the following:

1. High concurrency

One of the main advantages of using ZEGOCLOUD Express Video SDK is its ability to support high concurrency. This means it can handle many users simultaneously without experiencing any slowdown or performance issues. This is particularly useful for applications that support a high volume of users, such as those used for online education or live-streaming entertainment.

2. Ultra-low latency

Another critical benefit of ZEGOCLOUD Express Video SDK is its ultra-low latency. This means there is minimal delay between when an action is performed and when it is displayed on the screen. This is important for ensuring a smooth and seamless user experience, especially in real-time applications such as video calls.

3. Interactive video features

ZEGOCLOUD Express Video SDK allows developers to easily add interactive features to their video applications. For example, they can enable users to share their screens, draw on a shared whiteboard, or use virtual backgrounds during a video call. These features can enhance the overall user experience and make it more engaging and interactive.

To use the Express-Video SDK, developers must follow four steps to connect their applications to the ZEGOCLOUD streaming platform. This platform is designed to deliver high-quality, ultra-low latency, and interactive live video to end users across all platforms, with support for handling large numbers of users concurrently. This ensures that users have the best possible experience with live video.

video call background

Steps to Change Video Call Background

To use ZEGOCLOUD and its Express Video SDK for video call backgrounds, you will need a few things:

  • A ZEGOCLOUD developer account – Sign up here.
  • A device with an active internet connection and audio and video capabilities.
  • Some familiarity with web development.

Integrating ZEGOCLOUD’s Express Video SDK into your project to change the background for video calls is a straightforward process. Here’s how you can do it:

  1. Create a new project with an index.htmlindex.css, and index.js file. The folder structure should look something like this:
├── index.html
├── js
│   └── index.js
└── css
   └── index.css

2. Copy the following code to the index.html file:

<!DOCTYPE html>
    <meta charset="UTF-8">
    <title>Zego RTC Video Call</title>
    <link rel="stylesheet" href="./css/index.css">
        Zego RTC Video Call
    <h4>Local video</h4>
    <video id="local-video" autoplay muted playsinline controls></video>
    <h4>Remote video</h4>
    <video id="remote-video" autoplay muted playsinline controls></video>
    <script src="./js/index.js"></script>

3. Copy the following code to the index.css file:

    font-family: sans-serif;
    text-align: center;
video {
    width: 300px;
    height: auto;
    position: relative;
    margin: 0 auto;
    display: block;

    display: flex;
    height: auto;
    margin: auto;
    position: relative !important;
  1. Run and test your project on a local web server using the live-server extension. If you don’t have it installed, run the command npm i live-server -g to install it.
  2. Install the Express Video SDK into your project by running the commandnpm i zego-express-engine-webrtc to install the dependencies.

Implementation steps

To change the background during a video call using the ZEGOCLOUD video call SDK, you will need to use the setVideoBackground method of the ZegoExpressEngine class. This method allows you to specify an image or a video file as the background to be displayed during the call.

Here’s an example of how you can use this method in your code:

import { ZegoExpressEngine } from 'zego-express-engine';

// Initialize the ZegoExpressEngine object
const engine = new ZegoExpressEngine();

// Set the background image or video file

You can also specify a callback function as the second argument to the setVideoBackground method, which will be called when the background has been set successfully.

engine.setVideoBackground('path/to/image/or/video.jpg', function() {
  console.log('Background set successfully');

Note that the setVideoBackground  the method only works when the local user uses a camera that does not support hardware video encoding. If the local user’s camera does support hardware video encoding, the background will not be displayed.

Implementing a video call background can add a professional and personalized touch to your video call application and improve the user experience. We have learned how to add this customized touch using the setVideoBackground method of the ZegoExpressEngine.

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ZEGOCLOUD With our fully customizable and easy-to-integrate Live SDK, you can quickly build reliable, scalable, and interactive live streaming into your mobile, web, and desktop apps.

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