I am reverse-engineering a project and am running into some perplexing problems. The project is in Meteor, which I like, but doesn't seem to follow Meteors conventions.
This is essentially a javascript file to allow users to take a selfie using the laptop devices camera. However, after taking the photo, the camera does not turn off.
After having tried a number of suggestions online, I am putting the question: how does one turn off the camera?
Thank you for your help!
Template.newSelfie.rendered = function(){
// Grab elements, create settings, etc.
var canvas = document.getElementById("canvas"),
context = canvas.getContext("2d"),
video = document.getElementById("video"),
videoObj = { "video": true },
errBack = function(error) {
console.log("Video capture error: ", error.code);
};
// Put video listeners into place
if(navigator.getUserMedia) { // Standard
navigator.getUserMedia(videoObj, function(stream) {
video.src = stream;
video.play();
}, errBack);
} else if(navigator.webkitGetUserMedia) { // WebKit-prefixed
navigator.webkitGetUserMedia(videoObj, function(stream){
video.src = window.webkitURL.createObjectURL(stream);
video.play();
}, errBack);
}
else if(navigator.mozGetUserMedia) { // Firefox-prefixed
navigator.mozGetUserMedia(videoObj, function(stream){
video.src = window.URL.createObjectURL(stream);
video.play();
}, errBack);
}
// Converts canvas to an image
function convertCanvasToImage(canvas) {
var image = new Image();
image.src = canvas.toDataURL("image/png");
return image.src;
}
$('#take-selfie').click(function() {
context.drawImage(video, 0, 0, 450, 350);
var selfieImg = convertCanvasToImage(canvas);
Posts.insert({
ownerId: Meteor.userId(),
userWallId: Meteor.userId(),
content: '<img src="'+selfieImg+'">',
postedOn: new Date()
}, function(err, res) {
console.log(err || res);
});
Selfies.insert({
ownerId: Meteor.userId(),
image: selfieImg,
postedOn: moment().format('MM/DD/YYYY hh:mm a'),
createdAt: moment().format('YYYY-MM-DD')
}, function(err, res) {
console.log(err || res);
if(err){
console.log(err);
} else {
Router.go('profileSelfies');
}
});
});
};
const video = document.querySelector('video');
// A video's MediaStream object is available through its srcObject attribute
const mediaStream = video.srcObject;
// Through the MediaStream, you can get the MediaStreamTracks with getTracks():
const tracks = mediaStream.getTracks();
// Tracks are returned as an array, so if you know you only have one, you can stop it with:
tracks[0].stop();
// Or stop all like so:
tracks.forEach(track => track.stop())
https://dev.to/morinoko/stopping-a-webcam-with-javascript-4297
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