Which Camera will open getUserMedia API in mobile Device? Front or Rear?

Question

While using getUserMedia API to access camera in desktop it will open web camera.of course it is help to video communication.but which camera is invoked when it is used in mobil

Answer 1

The answer is yes, for Android the default camera is the front( <=> user) one. So I developed thes script below to choose between the front camera and the rear Camera

    //----------------------------------------------------------------------
    //  Here we list all media devices, in order to choose between
    //  the front camera and the rear camera.
    //      videoDevices[0] : Front Camera
    //      videoDevices[1] : Back Camera
    //  I used an array to save the devices ID 
    //  which I get with using devices.forEach()
    //  Then I set the video resolution.
    //----------------------------------------------------------------------
    navigator.mediaDevices.enumerateDevices()
    .then(devices => {
      var videoDevices = [0,0];
      var videoDeviceIndex = 0;
      devices.forEach(function(device) {
        console.log(device.kind + ": " + device.label +
          " id = " + device.deviceId);
        if (device.kind == "videoinput") {  
          videoDevices[videoDeviceIndex++] =  device.deviceId;    
        }
      });

      var constraints =  {width: { min: 1024, ideal: 1280, max: 1920 },
      height: { min: 776, ideal: 720, max: 1080 },
      deviceId: { exact: videoDevices[1]  } 
    };
    return navigator.mediaDevices.getUserMedia({ video: constraints });

  })
    .then(stream => {
      if (window.webkitURL) {
        video.src = window.webkitURL.createObjectURL(stream);
        localMediaStream = stream;
      } else if (video.mozSrcObject !== undefined) {
        video.mozSrcObject = stream;
      } else if (video.srcObject !== undefined) {
        video.srcObject = stream;
      } else {
        video.src = stream;
      }})
    .catch(e => console.error(e));