How to use webrtc front camera by default in Google chrome


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Questions: webrtc using the front camera by default in Google chrome 54

Developers! i have been testing to get access to both front and back camera for google chrome using webrtc and its absolutely working fine , We are able to change between both front and back cameras. Even so, by default google chrome picks up the front camera, is there any way i can make chrome pick up the back camera when the browser opens up?

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var videoSelect = document.querySelector('select#videoSource');
var selectors = [videoSelect];

function gotDevices(deviceInfos) {
  // Handles being called several times to update labels. Preserve values.
  var values = selectors.map(function(select) {
    return select.value;
  });
  selectors.forEach(function(select) {
    while (select.firstChild) {
      select.removeChild(select.firstChild);
    }
  });
  for (var i = 0; i !== deviceInfos.length; ++i) {
    var deviceInfo = deviceInfos[i];
    var option = document.createElement('option');
    option.value = deviceInfo.deviceId;
   if (deviceInfo.kind === 'videoinput') {
      option.text = deviceInfo.label || 'camera ' + (videoSelect.length + 1);
      videoSelect.appendChild(option);
    } else {
      console.log('Some other kind of source/device: ', deviceInfo);
    }
  }
  selectors.forEach(function(select, selectorIndex) {
    if (Array.prototype.slice.call(select.childNodes).some(function(n) {
      return n.value === values[selectorIndex];
    })) {
      select.value = values[selectorIndex];
    }
  });
}

navigator.mediaDevices.enumerateDevices().then(gotDevices).catch(handleError);

We tried accessing the array in Desc order to get the rear camera first, but could not help

for (var  i = deviceInfos.length - 1; i >= 0; i--) {
    var deviceInfo = deviceInfos[i];
    var option = document.createElement('option');
    option.value = deviceInfo.deviceId;
           ....... //code follows

Update: We also tried inserting these lines into the above given code but again the like response, open up the front camera by default

for (var i = 0; i !== deviceInfos.length; ++i) {
    var deviceInfo = deviceInfos[i];


   if (deviceInfo.kind === 'videoinput' && deviceInfo.facing == "environment") {
    videoSourceId = deviceInfo.id;


    } else {
      console.log('Some other kind of source/device: ', deviceInfo);
    }
  }
//other code

var constraints = {
    video: { optional: [{sourceId: videoSourceId}] }
  };
  navigator.mediaDevices.getUserMedia(constraints).
      then(gotStream).then(gotDevices).catch(handleError);
}

PS: We tried using facingMode: “environment” in the another code, but is there any extent for that here ?

Total Answers 2

Answers 1 :How to use webrtc front camera by default in Google chrome

How about using constraints ?

For the BACK camera:

{audio:false,video:{facingMode:{exact:"environment"}}}

For the FRONT camera:

{audio:false,video:{facingMode:"user"}}

Answers 2 :How to use webrtc front camera by default in Google chrome

Check for the facing in device Info label and set the default value.

if(deviceInfo.label.indexOf('back') > 0) { option.selected = true; }


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