I opened a webcam by using the following JavaScript code:
const stream = await navigator.mediaDevices.getUserMedia({ /* ... */ });
Is there any JavaScript code to stop or close the webcam?
Since this answer has been originally posted the browser API has changed.
.stop() is no longer available on the stream that gets passed to the callback.
The developer will have to access the tracks that make up the stream (audio or video) and stop each of them individually.
More info here: https://developers.google.com/web/updates/2015/07/mediastream-deprecations?hl=en#stop-ended-and-active
Example (from the link above):
stream.getTracks().forEach(function(track) {
track.stop();
});
Browser support may differ.
Previously, navigator.getUserMedia provided you with a stream in the success callback, you could call .stop() on that stream to stop the recording (at least in Chrome, seems FF doesn't like it)
Use any of these functions:
// 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();
}
});
}
Don't use stream.stop(), it's deprecated
MediaStream Deprecations
Use stream.getTracks().forEach(track => track.stop())
FF, Chrome and Opera has started exposing getUserMedia via navigator.mediaDevices as standard now (Might change :)
online demo
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();
Suppose we have streaming in video tag and id is video - <video id="video"></video> then we should have following code -
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;
Starting Webcam Video with different browsers
For Opera 12
window.navigator.getUserMedia(param, function(stream) {
video.src =window.URL.createObjectURL(stream);
}, videoError );
For Firefox Nightly 18.0
window.navigator.mozGetUserMedia(param, function(stream) {
video.mozSrcObject = stream;
}, videoError );
For Chrome 22
window.navigator.webkitGetUserMedia(param, function(stream) {
video.src =window.webkitURL.createObjectURL(stream);
}, videoError );
Stopping Webcam Video with different browsers
For Opera 12
video.pause();
video.src=null;
For Firefox Nightly 18.0
video.pause();
video.mozSrcObject=null;
For Chrome 22
video.pause();
video.src="";
With this the Webcam light go down everytime...
Try method below:
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();
You can end the stream directly using the stream object returned in the success handler to getUserMedia. e.g.
localMediaStream.stop()
video.src="" or null would just remove the source from video tag. It wont release the hardware.
Since you need the tracks to close the streaming, and you need the stream boject to get to the tracks, the code I have used with the help of the Muaz Khan's answer above is as follows:
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();
});
Of course this will close all the active video tracks. If you have multiple, you should select accordingly.
If the .stop() is deprecated then I don't think we should re-add it like #MuazKhan dose. It's a reason as to why things get deprecated and should not be used anymore. Just create a helper function instead... Here is a more es6 version
function stopStream (stream) {
for (let track of stream.getTracks()) {
track.stop()
}
}
You need to stop all tracks (from webcam, microphone):
localStream.getTracks().forEach(track => track.stop());
Start and Stop Web Camera,(Update 2020 React es6 )
Start Web Camera
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();
});
}
}
Stop Web Camera or Video playback in general
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());
}
Stop Web Camera function works even with video streams:
this.video.src = this.state.videoToTest;
this.video.play();
Using .stop() on the stream works on chrome when connected via http. It does not work when using ssl (https).
Please check this: https://jsfiddle.net/wazb1jks/3/
navigator.getUserMedia(mediaConstraints, function(stream) {
window.streamReference = stream;
}, onMediaError);
Stop Recording
function stopStream() {
if (!window.streamReference) return;
window.streamReference.getAudioTracks().forEach(function(track) {
track.stop();
});
window.streamReference.getVideoTracks().forEach(function(track) {
track.stop();
});
window.streamReference = null;
}
The following code worked for me:
public vidOff() {
let stream = this.video.nativeElement.srcObject;
let tracks = stream.getTracks();
tracks.forEach(function (track) {
track.stop();
});
this.video.nativeElement.srcObject = null;
this.video.nativeElement.stop();
}
Have a reference of stream form successHandle
var streamRef;
var handleVideo = function (stream) {
streamRef = stream;
}
//this will stop video and audio both track
streamRef.getTracks().map(function (val) {
val.stop();
});
Related
I have created an application that sings along in the app with the web audio API of JavaScript. This worked perfectly on iOS safari and Chrome, but the sound quality was poor on Android Chrome. To solve this, I tried changing the audio deviceId, but it still didn't work. Does someone have information that might help?
Doubt: After recording, I pass the file to the server and play it on another page. I am wondering if this is causing the problem.
This is my code
function captureUserMedia(mediaConstraints) {
navigator.mediaDevices.getUserMedia(mediaConstraints).then(onMediaSuccess)["catch"]();
}
function record() {
if (getParameterByName("startSec").length !== 0) {
masterSound.currentTime = getParameterByName("startSec");
}
masterSound.play();
if (document.querySelectorAll(".record")[0].getAttribute("status") == "off") {
document.querySelectorAll(".record")[0].setAttribute("status", "on");
document.querySelectorAll(".record")[0].classList.add("stoped");
var mediaConstraints;
const devices = navigator.mediaDevices.enumerateDevices()
devices.then((value) => {
// mediaConstraints = {
// audio: {
// deviceId: {
// exact: value[0].deviceId
// }
// },
// video: false
// };
mediaConstraints = {
audio: true,
video: false,
};
captureUserMedia(mediaConstraints, onMediaSuccess);
});
} else {
document.querySelectorAll(".record")[0].setAttribute("status", "off");
document.querySelectorAll(".record")[0].classList.remove("stoped");
mediaRecorder.stream.stop();
masterSound.pause();
}
}
function onMediaSuccess(stream) {
var audio = document.createElement('audio');
audio.controls = true;
audio.files = true;
audio.muted = true;
audio.srcObject = stream;
audio.play();
var audiosContainer = document.querySelectorAll(".audio_wrapper")[0];
audiosContainer.appendChild(audio);
audiosContainer.appendChild(document.createElement('hr'));
mediaRecorder = new MediaStreamRecorder(stream);
mediaRecorder.mimeType = 'audio/wav';
mediaRecorder.stream = stream;
mediaRecorder.recorderType = MediaRecorderWrapper;
mediaRecorder.audioChannels = 1;
mediaRecorder.start();
mediaRecorder.ondataavailable = function (blob) {
audioFile = blob;
var blobURL = URL.createObjectURL(blob);
document.querySelectorAll(".append_audio")[0].setAttribute("src", blobURL);
function blobToFile(theBlob, fileName) {
theBlob.lastModifiedDate = new Date();
theBlob.name = fileName;
return theBlob;
}
submit();
function submit() {
var audioTest = new Audio(URL.createObjectURL(blob));
audioTest.play();
}
};
}
When trying to build high-quality audio with getDisplayMedia, in the past I've passed in MediaStreamConstraints that remove some of the default processing on the input track:
stream = await navigator.mediaDevices.getDisplayMedia(
{
video: true,
audio:
{
channels: 2,
autoGainControl: false,
echoCancellation: false,
noiseSuppression: false
}
}
);
I'm still learning WebRTC myself, so I'm not sure if these same properties can be passed when using getUserMedia and MediaConstraints, but I thought I'd share in case helpful. It sounds like this might also be about available devices. Good luck!
Had a similar issue where we were getting complaints about very low sound/gain - barely hearable - with our HTML/JS recording client when running on Chrome on some Android devices.
Ended up buying an older Samsung phone (Galaxy A8) to easily replicate the issue.
The culprit was echoCancellation being set to false. With it disabled, we had a very low volume on the recorded audio. The solution was to set echoCancellation as true.
We ended up removing the constraint altogether and relied on each browser's defaults (echoCancellation is enabled by default on Chrome, Safari, Firefox).
Worth mentioning that autoGainControl and noiseSuppression inherit the value of echoCancellation, more exactly, if you only set audio: {echoCancellation: true} the other 2 constraints will also be set as true.
Here' my complete code for displaying and live recording audio and video (and later uploading the blob chunk into the server):
$(function () {
var handleSuccess = function(stream) {
var player = document.querySelector("#vid-user");
player.srcObject = stream;
console.log("Starting media recording")
var options = {mimeType: 'video/webm'};
var recordedChunks = [];
var mediaRecorder = new MediaRecorder(stream, options);
mediaRecorder.ondataavailable = function(e) {
console.log("Data available")
if (e.data.size > 0) {
recordedChunks.push(e.data);
var url = URL.createObjectURL(new Blob(recordedChunks));
console.log("URL: " + url)
}
}
mediaRecorder.start();
};
navigator.mediaDevices.getUserMedia({ audio: true, video: true })
.then(handleSuccess)
})
The video playback works, but the problem is that the mediaRecorder.ondataavailable is not triggered/called. What could be the problem here?
The start() method takes an optional parameter called timeslice. Unless you specify that parameter the dataavailable event only fires after you call stop() on the MediaRecorder.
https://developer.mozilla.org/en-US/docs/Web/API/MediaRecorder/start
The solution is to set
mediaRecorder.start(1000); // where 1000 is the interval
Solution according to the documentation (https://developer.mozilla.org/en-US/docs/Web/API/MediaRecorder): Use MediaRecorder.start("time in milliseconds") to trigger 'dataavailable' event at the specified interval AND/OR use setTimeout(MediaRecorder.requestData(), "time in milliseconds"). I have a jsFiddle example here (not complete code, check the console messages only).
Is it possible when user want to record either audio/video when permission is given like
({audio:true,video:true})
if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
navigator.mediaDevices.getUserMedia({ audio:true, video: true }).then(function (stream) {
if (recorder == null) {
recorder = new MediaRecorder(stream);
recorder.addEventListener('dataavailable', onRecordingReady);
}
video.srcObject = stream;
video.play();
})
.catch(function (err) {
alert(err)
});;
};
the problem is i have two radio button one is for audio record selection and another one is for video record selection since its very hard and complicated to use mediarecorder two times in a single page i have goten here stucked can somebody give a sujjetion fo this?Thanks in advance
I'm trying to use the getUserMedia method to access my webcam and track my face with clmtrackr (https://github.com/auduno/clmtrackr).
Some weeks ago it was working but since Chrome update to v50 I encounter issues, it uses the replacement video instead of calling my webcam.
navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;
// check for camerasupport
if (navigator.getUserMedia) {
var videoSelector = {video : true};
if (window.navigator.appVersion.match(/Chrome\/(.*?) /)) {
var chromeVersion = parseInt(window.navigator.appVersion.match(/Chrome\/(\d+)\./)[1], 10);
if (chromeVersion < 20) {
videoSelector = "video";
}
};
navigator.getUserMedia(videoSelector, function( stream ) {
if (video.mozCaptureStream) {
video.mozSrcObject = stream;
} else {
video.src = (window.URL && window.URL.createObjectURL(stream)) || stream;
}
video.play();
}, function() {
//it uses this alt video
insertAltVideo(video);
alert("There was some problem trying to fetch video from your webcam, using a fallback video instead.");
});
} else {
insertAltVideo(video);
alert("Your browser does not seem to support getUserMedia, using a fallback video instead.");
}
PS : It works as I want on Firefox
Thanks in advance
navigator.getUserMedia no longer works in Chrome (it returns undefined), use the newer MediaDevices interface:
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 console
video.srcObject = stream;
})
.catch(function(error) {
// ...
}
See more:
https://developer.mozilla.org/en-US/docs/Web/API/MediaDevices/getUserMedia
https://developers.google.com/web/updates/2015/07/mediastream-deprecations?hl=en
https://developers.google.com/web/updates/2015/10/media-devices?hl=en
after a couple of hours of struggling here I am. I have the following code, which apparently should just start my webcam and prompt the stream on the webpage:
<!doctype html>
<html>
<head>
<title>HTML5 Webcam Test</title>
</head>
<body>
<video id="sourcevid" autoplay>Put your fallback message here.</video>
<div id="errorMessage"></div>
<script>
video = document.getElementById('sourcevid');
navigator.getUserMedia = navigator.webkitGetUserMedia || navigator.getUserMedia;
window.URL = window.URL || window.webkitURL;
function gotStream(stream) {
if (window.URL) {
video.src = window.URL.createObjectURL(stream);
} else {
video.src = stream; // Opera.
}
video.onerror = function(e) {
stream.stop();
};
stream.onended = noStream;
}
function noStream(e) {
var msg = 'No camera available.';
if (e.code == 1) {
msg = 'User denied access to use camera.';
}
document.getElementById('errorMessage').textContent = msg;
}
navigator.webkitGetUserMedia({video: true}, gotStream, noStream);
</script>
</body>
</html>
No errors in the console, but no webcam stream either. Just the "User denied access to use camera.".
I tried another example, too long to show, but again apparently as soon as I try to run the page the stream falls into the .onended function:
function gotStream(stream) {
video.src = URL.createObjectURL(stream);
video.onerror = function () {
stream.stop();
};
stream.onended = noStream;
[...]
Where noStream is a simple function that prints something:
function noStream() {
document.getElementById('errorMessage').textContent = 'No camera available.';
}
So basically when I'm running the second example I'm shown the "No camera available" on the webpage.
I'm running on Chrome Version 22.0.1229.94, I saw somewhere that I needed to enable some flags, but I couldn't find them in my chrome://flags; the flags' name were Enable MediaStream and Enable PeerConnection, but in my version I only have the second one, which I enabled.
Any thoughts? Is the API I'm using old by any means? Can somebody point me to some working example?
Thanks
According to http://www.webrtc.org/running-the-demos the getUserMedia API is available on stable version as of Chrome 21 without the need to use any flag.
I think the error happens because you are trying to instantiate the stream without to define the url stream properly. Consider that you need to access the url stream differently in Chrome and Opera.
I would create the structure of your code as something like below:
function gotStream(stream) {
if (window.URL) {
video.src = window.URL.createObjectURL(stream) || stream;
video.play();
} else {
video.src = stream || stream; // Opera.
video.play();
}
video.onerror = function(e) {
stream.stop();
};
stream.onended = noStream;
}
function noStream(e) {
var msg = 'No camera available.';
if (e.code == 1) {
msg = 'User denied access to use camera.';
}
document.getElementById('errorMessage').textContent = msg;
}
var options = {video: true, toString: function(){return 'video';}};
navigator.getUserMedia(options, gotStream, noStream);
EDIT:
You need to replace the source video element with the media stream. Edited the code above.
video = document.getElementById('sourcevid');
I recommend for reading these two articles:
http://www.html5rocks.com/en/tutorials/getusermedia/intro/
http://dev.opera.com/articles/view/playing-with-html5-video-and-getusermedia-support/