The MediaDevices
interface provides access to connected media input devices like cameras and microphones, as well as screen sharing. In essence, it lets you obtain access to any hardware source of media data.
Properties
Inherits properties from its parent interface, EventTarget
.
Events
devicechange
- Fired when a media input or output device is attached to or removed from the user's computer.
Also available via theondevicechange
property.
Methods
Inherits methods from its parent interface, EventTarget
.
enumerateDevices()
- Obtains an array of information about the media input and output devices available on the system.
getSupportedConstraints()
- Returns an object conforming to
MediaTrackSupportedConstraints
indicating which constrainable properties are supported on theMediaStreamTrack
interface. See Capabilities and constraints in Media Capture and Streams API (Media Stream) to learn more about constraints and how to use them. getDisplayMedia()
- Prompts the user to select a display or portion of a display (such as a window) to capture as a
MediaStream
for sharing or recording purposes. Returns a promise that resolves to aMediaStream
. getUserMedia()
- With the user's permission through a prompt, turns on a camera and/or a microphone on the system and provides a
MediaStream
containing a video track and/or an audio track with the input.
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.onremovetrack = 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.height.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 The definition of 'MediaDevices' in that specification. |
Candidate Recommendation | Initial definition |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
MediaDevices | Chrome Full support 47 | Edge Full support ≤18 | Firefox Full support 33 | IE No support No | Opera Full support 30 | Safari Full support 11 | WebView Android Full support 47 | Chrome Android Full support 47 | Firefox Android Full support 36 | Opera Android Full support 30 | Safari iOS Full support 11 | Samsung Internet Android Full support 5.0 |
devicechange event | Chrome Full support 57 | Edge Full support 12 | Firefox Full support 52 | IE No support No | Opera Full support 34 | Safari No support No | WebView Android No support No | Chrome Android No support No | Firefox Android ? | Opera Android Full support 43 | Safari iOS No support No | Samsung Internet Android No support No |
enumerateDevices | Chrome Full support 47 | Edge Full support 12 | Firefox
Full support
63
| IE No support No | Opera Full support 34 | Safari Full support 11 | WebView Android Full support 47 | Chrome Android Full support 47 | Firefox Android
Full support
63
| Opera Android Full support 34 | Safari iOS Full support 11 | Samsung Internet Android Full support 5.0 |
getDisplayMedia() | Chrome
Full support
72
| Edge
Full support
79
| Firefox
Full support
66
| IE No support No | Opera
Full support
60
| Safari Full support 13 | WebView Android
No support
No
| Chrome Android No support No | Firefox Android
No support
No
| Opera Android No support No | Safari iOS No support No | Samsung Internet Android No support No |
getSupportedConstraints | Chrome Full support 53 | Edge Full support 12 | Firefox Full support 44 | IE No support No | Opera Full support 40 | Safari Full support 11 | WebView Android Full support 53 | Chrome Android Full support 52 | Firefox Android Full support 50 | Opera Android Full support 41 | Safari iOS Full support 11 | Samsung Internet Android Full support 6.0 |
getUserMedia | Chrome
Full support
52
| Edge Full support 12 | Firefox
Full support
36
| IE No support No | Opera
Full support
40
| Safari Full support 11 | WebView Android Full support 53 | Chrome Android
Full support
52
| Firefox Android
Full support
36
| Opera Android
Full support
41
| Safari iOS Full support 11 | Samsung Internet Android Full support 6.0 |
ondevicechange | Chrome Full support 57 | Edge Full support 12 | Firefox
Full support
52
| IE No support No | Opera Full support 34 | Safari No support No | WebView Android No support No | Chrome Android No support No | Firefox Android Full support Yes | Opera Android Full support 34 | Safari iOS No support No | Samsung Internet Android No support No |
Stereo audio capture | Chrome ? | Edge ? | Firefox Full support 55 | IE No support No | Opera ? | Safari No support No | WebView Android ? | Chrome Android ? | Firefox Android No support No | Opera Android ? | Safari iOS No support No | Samsung Internet Android ? |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
- See implementation notes.
- See implementation notes.
- User must explicitly enable this feature.
- User must explicitly enable this feature.
See also
- Media Capture and Streams API: The API this interface is part of.
- Screen Capture API: The API defining the
getDisplayMedia()
method. - WebRTC API
Navigator.mediaDevices
: Returns a reference to aMediaDevices
object that can be used to access devices.- CameraCaptureJS: HTML5 video capture and playback using
MediaDevices
and the MediaStream Recording API (source on GitHub) - OpenLang: HTML5 video language lab web application using
MediaDevices
and the MediaStream Recording API for video recording (source on GitHub)