如何使用node和openCV停止videoCapture（）

Question

我想从Node.js停止videoCaputure。我该怎么做？

var cv = require('opencv');
var camWidth = 640;
var camHeight = 480;
var camFps = 40;
var camInterval = 1000 / camFps;

camera = new cv.VideoCapture(0);
camera.setWidth(camWidth);
camera.setHeight(camHeight);

camera.read(function(err, im) {
   if (err) throw err;
   ...
}

现在，我想停止videoCapture ...

Answer 1

你试过调用release（）吗？ http://docs.opencv.org/3.2.0/d8/dfe/classcv_1_1VideoCapture.html#afb4ab689e553ba2c8f0fec41b9344ae6

在你的例子中它应该是：

camera.release();

Answer 2

你可以用这个例子来停止你的相机

///stop camera after 10 seconds
function isTimerFinished(timeBeforeExecute) {
    var currentTime = new Date().getTime() / 1000;
    return (currentTime < timeBeforeExecute + 10)
}


 var timeBeforeExecute = new Date().getTime() / 1000; 


var video = setInterval(function () {

        if (isTimerFinished(timeBeforeExecute)) {
            const frame = wCap.read();
            const image = cv.imencode('.jpg', frame).toString('base64');
            io.emit('image', image)
        } else {
            image = '../public/img/image.jpg';
            io.emit('image', image)
            clearInterval(video);
        }

    }, 1000 / FPS);