使用下列函数:

// stop both mic and camera
function stopBothVideoAndAudio(stream) {
    stream.getTracks().forEach(function(track) {
        if (track.readyState == 'live') {
            track.stop();
        }
    });
}

// stop only camera
function stopVideoOnly(stream) {
    stream.getTracks().forEach(function(track) {
        if (track.readyState == 'live' && track.kind === 'video') {
            track.stop();
        }
    });
}

// stop only mic
function stopAudioOnly(stream) {
    stream.getTracks().forEach(function(track) {
        if (track.readyState == 'live' && track.kind === 'audio') {
            track.stop();
        }
    });
}

试试下面的方法:

var mediaStream = null;
    navigator.getUserMedia(
        {
            audio: true,
            video: true
        },
        function (stream) {
            mediaStream = stream;
            mediaStream.stop = function () {
                this.getAudioTracks().forEach(function (track) {
                    track.stop();
                });
                this.getVideoTracks().forEach(function (track) { //in case... :)
                    track.stop();
                });
            };
            /*
             * Rest of your code.....
             * */
        });

    /*
    * somewhere insdie your code you call
    * */
    mediaStream.stop();

使用不同的浏览器启动网络摄像头视频

对于Opera 12

window.navigator.getUserMedia(param, function(stream) {
                            video.src =window.URL.createObjectURL(stream);
                        }, videoError );

Firefox夜间18.0

window.navigator.mozGetUserMedia(param, function(stream) {
                            video.mozSrcObject = stream;
                        }, videoError );

针对Chrome 22

window.navigator.webkitGetUserMedia(param, function(stream) {
                            video.src =window.webkitURL.createObjectURL(stream);
                        },  videoError );

使用不同浏览器停止摄像头视频

对于Opera 12

video.pause();
video.src=null;

Firefox夜间18.0

video.pause();
video.mozSrcObject=null;

针对Chrome 22

video.pause();
video.src="";

有了这个，网络摄像头的灯每次都要熄灭……

因为你需要音轨来关闭流，你需要流对象来获得音轨，我在Muaz Khan的回答的帮助下使用的代码如下:

if (navigator.getUserMedia) {
    navigator.getUserMedia(constraints, function (stream) {
        videoEl.src = stream;
        videoEl.play();
        document.getElementById('close').addEventListener('click', function () {
            stopStream(stream);
        });
    }, errBack);

function stopStream(stream) {
console.log('stop called');
stream.getVideoTracks().forEach(function (track) {
    track.stop();
});

当然，这将关闭所有活动的视频轨道。如果你有多个，你应该选择相应的。

FF, Chrome和Opera已经开始通过导航器公开getUserMedia。mediaDevices现在是标准(可能会改变:)

在线演示

navigator.mediaDevices.getUserMedia({audio:true,video:true})
    .then(stream => {
        window.localStream = stream;
    })
    .catch( (err) =>{
        console.log(err);
    });
// later you can do below
// stop both video and audio
localStream.getTracks().forEach( (track) => {
track.stop();
});
// stop only audio
localStream.getAudioTracks()[0].stop();
// stop only video
localStream.getVideoTracks()[0].stop();

不要使用stream.stop()，它已被弃用

MediaStream用法

使用stream.getTracks()。forEach(track => track.stop())