MediaDevices

Experimental: Esta es una tecnología experimental
Comprueba la Tabla de compabilidad de navegadores cuidadosamente antes de usarla en producción.

The MediaDevices interface provides access to connected media input devices like cameras and microphones, as well as screensharing.

Properties

None.

Methods

MediaDevices.getUserMedia()
With the user's permission through a prompt, turns on a camera or screensharing and/or a microphone on the system and provides a MediaStream (en-US) containing a video track and/or an audio track with the input.
MediaDevices.enumerateDevices() (en-US)
Obtains an array of information about the media input and output devices available on the system.

Example

'use strict';

// Put variables in global scope to make them available to the browser console.
var video = document.querySelector('video');
var constraints = window.constraints = {
  audio: false,
  video: true
};
var errorElement = document.querySelector('#errorMsg');

navigator.mediaDevices.getUserMedia(constraints)
.then(function(stream) {
  var videoTracks = stream.getVideoTracks();
  console.log('Got stream with constraints:', constraints);
  console.log('Using video device: ' + videoTracks[0].label);
  stream.onended = function() {
    console.log('Stream ended');
  };
  window.stream = stream; // make variable available to browser console
  video.srcObject = stream;
})
.catch(function(error) {
  if (error.name === 'ConstraintNotSatisfiedError') {
    errorMsg('The resolution ' + constraints.video.width.exact + 'x' +
        constraints.video.width.exact + ' px is not supported by your device.');
  } else if (error.name === 'PermissionDeniedError') {
    errorMsg('Permissions have not been granted to use your camera and ' +
      'microphone, you need to allow the page access to your devices in ' +
      'order for the demo to work.');
  }
  errorMsg('getUserMedia error: ' + error.name, error);
});

function errorMsg(msg, error) {
  errorElement.innerHTML += '<p>' + msg + '</p>';
  if (typeof error !== 'undefined') {
    console.error(error);
  }
}

Specifications

Specification Status Comment
Media Capture and Streams
La definición de 'MediaDevices' en esta especificación.
Candidate Recommendation Initial definition

Browser compatibility

BCD tables only load in the browser

See also