Could not change audio input/output and video input about opentok-react

[msach22]

You can adjust the audio source by doing something like this:
https://tokbox.com/developer/guides/audio-video/js/#setAudioSource

For switching between multiple cameras, you can use the cycleVideo function: https://tokbox.com/developer/guides/audio-video/js/#cycleVideo

Using React, you will need to create a Ref to the OTPublisher instance and call getPublisher so you can get the OpenTok publisher instance.

Here's an example on how to use cycleVideo:

class MyComponent extends Component {
  constructor(props) {
    super(props);
    this.otPublisher = React.createRef();
  }
  cycleVideo = () => { 
   if (this.otPublisher) { 
    publisher = this.otPublisher.current.getPublisher();
    publisher.cycleVideo().then().catch() // implement custom logic here
   } 
  } 
  render() {
    return ( 
      <div>
        <OTPublisher ref={this.otPublisher} />;
        <button onClick={this.cycleVideo}> Cycle Video </button>
      </div>
    )
  }
}