@formoe/use-media-stream

use-media-stream

The useMediaStream hook. The hook can be used to acquire MediaStream input objects from the users system using the navigator.mediaDevices interface.

Usage

import { useMediaStream } from "@formoe/use-media-stream"

const streamConfig = {
  requestAudio: true,
  requestVideo: true,
  dummyAudio: true,
  dummyVideo: true,
}

const ownVideoPreview = useRef<null | HTMLMediaElement>(null)

const { streamResult } = useMediaStream({ streamConfig, display })

// initially mute outgoing audio tracks (mute own mic)
useEffect(() => {
  if (streamResult.response) {
    streamResult.response.getAudioTracks().forEach((track) => {
      track.enabled = false
    })
  }
}, [streamResult.response])

return <video ref={ownVideoPreview}></video>

Returned Interface

The hook returns the streamResult. This is a @formoe/use-async result. It contains the acquired MediaStream object as response if finished successfully and an error if the given configuration could not successfully be fullfilled.

Params

The hook takes a configuration object containing two parameters:

Stream Configuration

streamConfig contains the configuration on which devices to acquire.

The optional flags requestAudio and requestVideo mark whether or not the specified media type is optional:

• undefined means media will be aquired if possible but ignored if not
• true means media has to be aquired, resulting in an error response on failure
• false means meadia will not be aquired in any case

Acquiring media will prompt the user to allow access to the given media type.

The optional flags dummyAudio and dummyVideo mark whether or not a dummy track should be used if media is not aquired. For video this will result in a black 640x480px track and for audio in a silent track. This is useful if you need media tracks (for example for a WebRTC connection) but can not aquire it from the user.

The display parameter is a HTMLMediaElement, that get's its srcObject set to the aquired stream on sucessful aquisition.

{
  streamConfig: {
    requestAudio?: boolean,
    requestVideo?: boolean,
    dummyAudio?: boolean,
    dummyVideo?: boolean,
  },
  display?: HTMLMediaElement | null,
}