我使用以下JavaScript代码打开了一个网络摄像头:
const stream = await navigator.mediaDevices.getUserMedia({ /* ... */ });
是否有任何JavaScript代码停止或关闭网络摄像头?
我使用以下JavaScript代码打开了一个网络摄像头:
const stream = await navigator.mediaDevices.getUserMedia({ /* ... */ });
是否有任何JavaScript代码停止或关闭网络摄像头?
当前回答
当通过http连接时,在流上使用.stop()在chrome上工作。它在使用ssl (https)时不起作用。
其他回答
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();
启动和停止网络摄像头,(更新2020 React es6)
开启Web摄像头
stopWebCamera =()=>
//Start Web Came
if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
//use WebCam
navigator.mediaDevices.getUserMedia({ video: true }).then(stream => {
this.localStream = stream;
this.video.srcObject = stream;
this.video.play();
});
}
}
停止网络摄像头或视频播放一般
stopVideo =()=>
{
this.video.pause();
this.video.src = "";
this.video.srcObject = null;
// As per new API stop all streams
if (this.localStream)
this.localStream.getTracks().forEach(track => track.stop());
}
停止网络摄像头功能,即使视频流:
this.video.src = this.state.videoToTest;
this.video.play();
假设我们有流式视频标签,id是video - <video id="video"></video>,那么我们应该有以下代码-
var videoEl = document.getElementById('video');
// now get the steam
stream = videoEl.srcObject;
// now get all tracks
tracks = stream.getTracks();
// now close each track by having forEach loop
tracks.forEach(function(track) {
// stopping every track
track.stop();
});
// assign null to srcObject of video
videoEl.srcObject = null;
你需要停止所有的轨迹(来自摄像头,麦克风):
localStream.getTracks().forEach(track => track.stop());
不要使用stream.stop(),它已被弃用
MediaStream用法
使用stream.getTracks()。forEach(track => track.stop())