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HTML

              
                <div id="container">
  <video id="videoel" width="400" height="300" preload="auto" loop playsinline autoplay>
  </video>
  <canvas id="overlay" width="400" height="300"></canvas>
</div>
<div id="console"></div>
<input type="checkbox" id="frame">Show frame</input>
              
            
!

CSS

              
                body {
  font-family: "Lato";
  background-color: #f0f0f0;
  margin: 0px auto;
  max-width: 1150px;
}

#overlay {
  position: absolute;
  top: 0px;
  left: 0px;
  -o-transform: scaleX(-1);
  -webkit-transform: scaleX(-1);
  transform: scaleX(-1);
  -ms-filter: fliph; /*IE*/
  filter: fliph; /*IE*/
}

#videoel {
  -o-transform: scaleX(-1);
  -webkit-transform: scaleX(-1);
  transform: scaleX(-1);
  -ms-filter: fliph; /*IE*/
  filter: fliph; /*IE*/
}

#container {
  position : relative;
  width : 370px;
  /*margin : 0px auto;*/
}
              
            
!

JS

              
                // https://www.auduno.com/clmtrackr/examples/clm_emotiondetection.html
var vid = document.getElementById('videoel');
var vid_width = vid.width;
var vid_height = vid.height;
var overlay = document.getElementById('overlay');
var overlayCC = overlay.getContext('2d');

function adjustVideoProportions() {
  // resize overlay and video if proportions are different
  // keep same height, just change width
  var proportion = vid.videoWidth/vid.videoHeight;
  vid_width = Math.round(vid_height * proportion);
  vid.width = vid_width;
  overlay.width = vid_width;
}

function gumSuccess( stream ) {
  // add camera stream if getUserMedia succeeded
  if ("srcObject" in vid) {
    vid.srcObject = stream;
  } else {
    vid.src = (window.URL && window.URL.createObjectURL(stream));
  }
  vid.onloadedmetadata = function() {
    adjustVideoProportions();
    vid.play();
  }
  vid.onresize = function() {
    adjustVideoProportions();
    if (trackingStarted) {
      ctrack.stop();
      ctrack.reset();
      ctrack.start(vid);
    }
  }
}

function gumFail() {
  alert("There was some problem trying to fetch video from your webcam. If you have a webcam, please make sure to accept when the browser asks for access to your webcam.");
}

navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;
window.URL = window.URL || window.webkitURL || window.msURL || window.mozURL;

// check for camerasupport
if (navigator.mediaDevices) {
  navigator.mediaDevices.getUserMedia({video : true}).then(gumSuccess).catch(gumFail);
} else if (navigator.getUserMedia) {
  navigator.getUserMedia({video : true}, gumSuccess, gumFail);
} else {
  alert("This demo depends on getUserMedia, which your browser does not seem to support. :(");
}

/*********** setup of emotion detection *************/
// set eigenvector 9 and 11 to not be regularized. This is to better detect motion of the eyebrows
pModel.shapeModel.nonRegularizedVectors.push(9);
pModel.shapeModel.nonRegularizedVectors.push(11);

var ctrack = new clm.tracker({useWebGL : true});
ctrack.init(pModel);
var trackingStarted = false;

function startVideo() {
  // start video
  vid.play();
  // start tracking
  ctrack.start(vid);
  trackingStarted = true;
  // start loop to draw face
  drawLoop();
}

function drawLoop() {
  requestAnimFrame(drawLoop);
  overlayCC.clearRect(0, 0, vid_width, vid_height);
  //psrElement.innerHTML = "score :" + ctrack.getScore().toFixed(4);
  if (ctrack.getCurrentPosition()) {
    if (document.querySelector('#frame').checked) {
      ctrack.draw(overlay);    
    }
  }
  var cp = ctrack.getCurrentParameters();
  var er = ec.meanPredict(cp);
  if (er) {
    document.querySelector('#console').innerText = er.map(s => JSON.stringify(s)).join('\n');
  }
}

delete emotionModel['angry'];
delete emotionModel['disgusted'];
delete emotionModel['fear'];
delete emotionModel['surprised'];
var ec = new emotionClassifier();
ec.init(emotionModel);

startVideo();
              
            
!
999px

Console