Implementing webrtc functionality in Angular 2: A beginner's guide

Question

Implementing webrtc functionality in Angular 2: A beginner's guide

I attempted to integrate webrtc into my Angular 2 TypeScript project and encountered the following error: navigation.getUserMedia is not a function.

Below is the code I used:

ngOnInit(): void {
    navigator.getUserMedia(this.constraints,
      stream => {
        var track: MediaStreamTrack = stream.getTracks()[0];
        console.log('label:' + track.label);
        console.log('ended:' + track.readyState);
        track.onended = (event:Event) => console.log('Track ended');
        var objectUrl = URL.createObjectURL(stream);
      },
      error => {
        console.log('Error message: ' + error.message);
        console.log('Error name: ' + error.name);
      });
  }

You can view the code on Plunker here.

If anyone has any advice or solutions, please let me know.

typescript angular webrtc

Answer 1

Answer №1

To ensure full access to WebRTC functions, it is recommended to include adapter.js from https://github.com/webrtc/adapter

You can easily integrate the necessary code by using the following snippet:

navigator.getUserMedia = ( navigator.getUserMedia ||
                       navigator.webkitGetUserMedia ||
                       navigator.mozGetUserMedia ||
                       navigator.msGetUserMedia);

Although you could use the above code alone, it may limit your access to certain WebRTC features. Including adapter.js is the preferred method as it ensures complete functionality and is regularly updated and maintained by Google, a major contributor to the WebRTC community.

Answer 2

To ensure full access to WebRTC functions, it is recommended to include adapter.js from https://github.com/webrtc/adapter

You can easily integrate the necessary code by using the following snippet:

navigator.getUserMedia = ( navigator.getUserMedia ||
                       navigator.webkitGetUserMedia ||
                       navigator.mozGetUserMedia ||
                       navigator.msGetUserMedia);

Although you could use the above code alone, it may limit your access to certain WebRTC features. Including adapter.js is the preferred method as it ensures complete functionality and is regularly updated and maintained by Google, a major contributor to the WebRTC community.

Answer 3

Answer №2

here is how I implemented WebRTC in Angular 4 -->

import {Component, OnInit, ViewChild} from '@angular/core';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit {

  @ViewChild('hardwareVideo') hardwareVideo: any;

  _navigator = <any> navigator;
  localStream;

  ngOnInit() {

    const video = this.hardwareVideo.nativeElement;
    this._navigator = <any>navigator;

    this._navigator.getUserMedia = ( this._navigator.getUserMedia || this._navigator.webkitGetUserMedia
    || this._navigator.mozGetUserMedia || this._navigator.msGetUserMedia );

    this._navigator.mediaDevices.getUserMedia({video: true})
      .then((stream) => {
        this.localStream = stream;
        video.src = window.URL.createObjectURL(stream);
        video.play();
    });

  }

  stopStream() {
    const tracks = this.localStream.getTracks();
    tracks.forEach((track) => {
      track.stop();
    });
  }

}

template:

<div style="text-align:center">
  <h1>
    Welcome to my WebRTC implementation demo!
  </h1>
  <button (click)="stopStream()">Stop Streaming</button>
  <video #hardwareVideo autoplay></video>
</div>

Answer 4

here is how I implemented WebRTC in Angular 4 -->

import {Component, OnInit, ViewChild} from '@angular/core';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit {

  @ViewChild('hardwareVideo') hardwareVideo: any;

  _navigator = <any> navigator;
  localStream;

  ngOnInit() {

    const video = this.hardwareVideo.nativeElement;
    this._navigator = <any>navigator;

    this._navigator.getUserMedia = ( this._navigator.getUserMedia || this._navigator.webkitGetUserMedia
    || this._navigator.mozGetUserMedia || this._navigator.msGetUserMedia );

    this._navigator.mediaDevices.getUserMedia({video: true})
      .then((stream) => {
        this.localStream = stream;
        video.src = window.URL.createObjectURL(stream);
        video.play();
    });

  }

  stopStream() {
    const tracks = this.localStream.getTracks();
    tracks.forEach((track) => {
      track.stop();
    });
  }

}

template:

<div style="text-align:center">
  <h1>
    Welcome to my WebRTC implementation demo!
  </h1>
  <button (click)="stopStream()">Stop Streaming</button>
  <video #hardwareVideo autoplay></video>
</div>

Answer 5

Answer №3

You have encountered a few errors:

1) The function getUserMedia returns a Promise, but there is no .then method utilized.

2) It is advised to use

navigator.mediaDevices.getUserMedia

instead of navigator.getUserMedia.

3) Ensure that the line

video = document.querySelector('video');

is placed within the ngOnInit method.

4) Consequently, you must declare video: HTMLVideoElement; in the initial section.

5) Use this.video.srcObject = stream to assign the stream to the HTMLVideoElement.

Combining all corrections will result in the following revised code:

import {Component, OnInit} from '@angular/core'

@Component({
  selector: 'my-app',
  template: `
    <h1>Realtime communication with WebRTC</h1>
    <video autoplay></video>
  `
})
export class App {

  video: HTMLVideoElement;
  constraints = { audio: false, video: true };

  constructor() {}

  ngOnInit(): void {
    this.video = document.querySelector('video');
    navigator.mediaDevices.getUserMedia(this.constraints).then(
      stream => {
        this.video.srcObject = stream
      },
      error => {
        console.log('Error: ' + error);
      });
  }
}

Answer 6

You have encountered a few errors:

1) The function getUserMedia returns a Promise, but there is no .then method utilized.

2) It is advised to use

navigator.mediaDevices.getUserMedia

instead of navigator.getUserMedia.

3) Ensure that the line

video = document.querySelector('video');

is placed within the ngOnInit method.

4) Consequently, you must declare video: HTMLVideoElement; in the initial section.

5) Use this.video.srcObject = stream to assign the stream to the HTMLVideoElement.

Combining all corrections will result in the following revised code:

import {Component, OnInit} from '@angular/core'

@Component({
  selector: 'my-app',
  template: `
    <h1>Realtime communication with WebRTC</h1>
    <video autoplay></video>
  `
})
export class App {

  video: HTMLVideoElement;
  constraints = { audio: false, video: true };

  constructor() {}

  ngOnInit(): void {
    this.video = document.querySelector('video');
    navigator.mediaDevices.getUserMedia(this.constraints).then(
      stream => {
        this.video.srcObject = stream
      },
      error => {
        console.log('Error: ' + error);
      });
  }
}

Answer 7

Answer №4

Make sure to perform the following steps before summoning that function:

navigator.getUserMedia = ( navigator.getUserMedia ||
                       navigator.webkitGetUserMedia ||
                       navigator.mozGetUserMedia ||
                       navigator.msGetUserMedia);

Answer 8

Make sure to perform the following steps before summoning that function:

navigator.getUserMedia = ( navigator.getUserMedia ||
                       navigator.webkitGetUserMedia ||
                       navigator.mozGetUserMedia ||
                       navigator.msGetUserMedia);

Implementing webrtc functionality in Angular 2: A beginner's guide

Answer №1

Answer №2

Answer №3

You have encountered a few errors:

Combining all corrections will result in the following revised code:

Answer №4

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