H5调用本地摄像头

<video src="" id="vvv"></video>
<canvas></canvas>

 var video = document.getElementById("vvv");
  navigator.getUserMedia({video:true}, function (stream) {
    video.src = window.webkitURL.createObjectURL(stream);
  }, function (error) { alert(error); });
  setInterval(function () {

  },16)