Virtual Background Removal

AI auto camera background removal using Google Mediapipe.

Video Resolution (ideal)
Video Framerate (ideal)
Audio/Video Inputs
Video Input Source
Audio Input Source
Audio Output Source

This example demonstrates dynamic virtual background removal using Google Mediapipe Segmentation. Rendering is applied using efficient graphics rendering. CPU usage is incurred obtaining the virtual stream for publishing due to software encoding in Chrome therefore the resolution needs to be restricted to 720p.

Backgrounds can be applied using the bgImage or backgroundColor config on the publisher.

With screen toggling enabled, wen switching to screenshare the screenshare video will be rendered as a GPU background texture, the video will be rendered in the foreground resized.

An api is provided to toggle enabling the virtual rendering and updating the background image, color texture or chromakey keycolor. The render type can be toggled between 1 for mediapipe and 2 for chromakey or empty argument for off.

Virtual background is supported in webrtc publishing or web conferencing features.

The maxHeight is to restrict the canvas rendering stream dimensions. Canvas capture streams are software encoding and increases cpu on top of the Mediapipe segmenetation and webgl rendering solution. In 1080p the cpu usage doubles, 720p seems more efficient.

Virtual Screen Sharing

With share screen enabled with toggledScreen in webrtc publishing and virtual enabled. A share screen virtual mixer with camera input will be enabled.

In web conferencing. Screen publishing is seperate and will not be mixed and only the stream of the virtual rendering will be switched to.

The scaledWidth configuration is a percentage of scaling the video texture to the screen share texture background.

Mediapipe Screensharing

Configuring a background image for the video stream is possible by setting the player poster image.

.video-js {
    background-color: #000000 !important;
    background-image: url(../../images/virtualbg.jpg) !important;
    background-repeat: 'no-repeat !important';
    background-position: 'center center !important';
    <div class="flex w-full h-auto my-auto">
      <video class="video-js vjs-default-skin vjs-fluid virtual" crossorigin="anonymous" controls="" id="virtual-background"></video>
  <script type="text/javascript">
  	var player = videojs("virtual-background", {
    "plugins": {
        "peakmeter": {},
        "rtcpublisher": {
            "applicationName": "webrtc",
            "autoStartDevice": true,
            "publishToken": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwiaWF0IjoxNTE2MjM5MDIyLCJpc3MiOiJ3ZWJydGMiLCJleHAiOjE3MDI2NjAxNDMzNjN9.mOZo9AQ42Ff_HazlVOTBsnejew1GTtGrtggBPZi_Yas",
            "publisher": true,
            "server": "wowza",
            "serverURL": "",
            "toggleScreen": true,
            "userData": {
                "param1": "value1"
        "virtualbackground": {
            "backgroundColor": "000000",
            "maxHeight": 720,
            "renderType": 1,
            "scaledWidth": 0.25
    "poster": "../../images/virtualbg.jpg",
    "sources": [
            "src": "myStream",
            "type": "application/webrtc"

      player.on("devices", (event, devicesMap, deviceInfos) => {
//get available devices here for building your own UI
console.log("devices", devicesMap, deviceInfos);
player.on("mediastart", (e, info, deviceInfo, videoConstraints, capabilities) => {
//console.log("mediastart111", deviceInfo);
//selected device has been activated
console.log("Device Start ", info.deviceInfo);
console.log("Updated Device Info ", info.newDeviceInfo);
console.log("Video Constraints ", info.videoConstraints);
console.log("Capabilities ", info.capabilities);
player.on("mediastop", (e) => {
console.log("Device Stop");
player.on("startpublish", (e, supportsParams) => {
console.log("Publishing Started");
//use this for enabling / disabling bandwidth select menus while publishing
//browsers that don't support it cannot update bitrate controls while publishing
console.log("Browser Supports peer setParameters ", supportsParams);
player.on("stoppublish", (e) => {
console.log("Publishing Stopped");
player.on("recordstart", (e) => {
console.log("Recording Started");
player.on("recordstop", (e) => {
console.log("Recording Stopped");
player.on("sendmessage", (e, message) => {
console.log("Signal Server Send Message: ", message);
player.on("gotmessage", (e, message) => {
console.log("Signal Server Receive Message: ", message);
player.on("offer", (e, offer) => {
console.log("WebRTC Offer ", offer.sdp);
player.on("answer", (e, answer) => {
console.log("WebRTC Answer ", answer.sdp);
player.on("bitratechanged", (e, params) => {
console.log("WebRTC Bitrate Changed ", params);
player.on("outputsuccess", (e, sinkId) => {
console.log("Success, audio output device attached:" + sinkId);
player.on("outputerror", (e, message) => {
player.on("rtcerror", (e, error) => {
console.log("WebRTC Error: ", error.message,;