unknowndevicesu盘-(unknown硬盘)

来源：191路由网 2023-01-25 16:22:06

unknowndevicesu盘 (unknown硬盘)

MediaDevices 接口提供访问连接媒体输入的设备，如照相机和麦克风，以及屏幕共享等。它可以使你取得任何硬件资源的媒体数据。

属性

从父类EventTarget中继承的属性.

事件devicechange返回 devicechange 事件类型的事件处理程序。也可通过 ondevicechange 访问方法

从其父项继承方法 EventTarget.

MediaDevices.enumerateDevices()获取有关系统中可用的媒体输入和输出设备的一系列信息。getSupportedConstraints()返回一个符合 MediaTrackSupportedConstraints (en-US) 的对象。该对象指明了 MediaStreamTrack 接口支持的可约束的属性。查看 Capabilities and constraints in Media Capture and Streams API (Media Stream) 去了解更多相关信息。getDisplayMedia()提示用户选择显示器或显示器的一部分（例如窗口）以捕获为MediaStream 以便共享或记录。返回解析为MediaStream的Promise。MediaDevices.getUserMedia()在用户通过提示允许的情况下，打开系统上的相机或屏幕共享和/或麦克风，并提供 MediaStream 包含视频轨道和/或音频轨道的输入。示例

'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 consolevideo.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);}}规范

规范	状态	评论
Media Capture and Streams MediaDevices	Candidate Recommendation	初始定义

浏览器兼容性

desktop

mobile

Chrome

Edge

Firefox

Internet Explorer

Opera

Safari

WebView Android

Chrome Android

Firefox Android

Opera Android

iOS Safari

Samsung Internet

MediaDevices

Full support47

Full support12

Full support33

No supportNo

Full support30

Full support11

Full support47

Full support36

Full support30

Full support11

Full support5.0

devicechange event

Full support57

Full support12

Full support52

No supportNo

Full support34

Full support11

No supportNo

Compatibility unknown; please update this.?

Full support43

Full support11

No supportNo

enumerateDevices

Full support47

Full support12

Full support39Open

No supportNo

Full support34

Full support11

Full support47

Full support39Open

Full support34

Full support11

Full support5.0

getDisplayMedia()

Full support72Open

Full support79Open

Full support66Open

No supportNo

Full support60Open

Full support13

No supportNofootnoteOpen

No supportNo

No supportNofootnoteOpen

No supportNo

Audio capture support

Full support74footnoteOpen

Full support≤ 79footnoteOpen

No supportNo

Compatibility unknown; please update this.?

No supportNo

getSupportedConstraints

Full support53

Full support12

Full support44

No supportNo

Full support40

Full support11

Full support53

Full support52

Full support50

Full support41

Full support11

Full support6.0

getUserMedia

Full support53footnoteOpen

Full support12

Full support36footnoteOpen

No supportNo

Full support40footnoteOpen

Full support11

Full support53

Full support53footnoteOpen

Full support36footnoteOpen

Full support41footnoteOpen

Full support11

Full support6.0

Secure context required

Full support53

Full support79

Full support68

No supportNo

Full support40

Compatibility unknown; please update this.?

Full support53

Full support68

Full support41

Compatibility unknown; please update this.?

Full support6.0

ondevicechange

Full support57

Full support12

Full support52Open

No supportNo

Full support34

Full support11

No supportNo

Full supportYes

Full support34

Full support11

No supportNo

Stereo audio capture

Compatibility unknown; please update this.?

Full support55

No supportNo

Compatibility unknown; please update this.?

No supportNo

Compatibility unknown; please update this.?

No supportNo

Compatibility unknown; please update this.?

No supportNo

Compatibility unknown; please update this.?

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unknowndevicesu盘-(unknown硬盘)

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