Accessing WebCam with NodeJS

Question

Does anyone have any experience with trying to access a webcam through node? I can\'t seem to find any prior attempts at this.

To expand a bit - I have a nodeJS serv

Answer 1

accessing web in node application is very simple we just need to use html5 getUserMedia() method to do that and reaming part is very easy here is complete code please node i am using express framework:

Step 1. My layout.jade file in which i am accessing web cam

extends layout
block content
  div(class="container" id="Cool" ng-app="mainApp" ng-controller="formController")
    h2.blue.red#header("property"="pValue") Capture your image from webcam
    div.row
     div.col-md-6
       video#video(autoplay='')
     div.col-md-6
       canvas#canvas(width='640', height='480')
    div
      button#snap Capture
      button#new New
      button(id="upload" ng-click="uploadImage()") Upload


  script(type="text/javascript").
   // Put event listeners into place
      window.addEventListener("DOMContentLoaded", function() {
      // Grab elements, create settings, etc.
      var canvas = document.getElementById("canvas"),
      context = canvas.getContext("2d"),
      video = document.getElementById("video"),
      videoObj = { "video": true },
      errBack = function(error) {
      console.log("Video capture error: ", error.code);
      };
      // Put video listeners into place
      if(navigator.getUserMedia) { // Standard
      navigator.getUserMedia(videoObj, function(stream) {
      video.src = stream;
      video.play();
      }, errBack);
      } else if(navigator.webkitGetUserMedia) { // WebKit-prefixed
      navigator.webkitGetUserMedia(videoObj, function(stream){
      video.src = window.URL.createObjectURL(stream);
      video.play();
      }, errBack);
      } else if(navigator.mozGetUserMedia) { // WebKit-prefixed
      navigator.mozGetUserMedia(videoObj, function(stream){
      video.src = window.URL.createObjectURL(stream);
      video.play();
      }, errBack);
      }
      // Trigger photo take
      document.getElementById("snap").addEventListener("click", function() {
      context.drawImage(video, 0, 0, 640, 480);
      // Littel effects
      //$('#video').fadeOut('slow');
      $('#canvas').fadeIn('slow');
      //$('#snap').hide();
      //$('#new').show();
      // Allso show upload button
      //$('#upload').show();
      });
      // Capture New Photo
      document.getElementById("new").addEventListener("click", function() {
      //$('#video').fadeIn('slow');
      //$('#canvas').fadeOut('slow');
      //$('#snap').show();
      //$('#new').hide();
      });
      // Upload image to sever
      document.getElementById("upload").addEventListener("click", function(){
      var dataUrl = canvas.toDataURL();
       console.log(dataUrl);

      });
      }, false);   
   var mainApp = angular.module("mainApp", []);
   mainApp.controller("formController", function($scope, $http) {
       $scope.uploadImage = function () {
         var request = $http({
            method: "post",
            url:  "/captureImage",
            data: {
               base64: document.getElementById("canvas").toDataURL()
            },
            headers: { 'Content-Type': 'application/json' }
          });
        request.success(function (data) {
          console.log(data);
        });
        request.error(function(serverResponse, status, headers, config) {
           alert("failure");
        });
      };
   });

Step 2. my routes file in which i hand or save my uploaded image

router.get('/captureImage', function(req, res, next) {
    res.render('captureImage', { title: 'Capture Image and upload' });
});

router.post('/captureImage', function(req, res, next) {
    //console.log("FormData "+ req.body.base64);
    var base64Data = req.body.base64.replace(/^data:image\/png;base64,/, "");
    fs.writeFile("uploads/out.png", base64Data, 'base64', function(err) {
        if(err){
            console.log(err);
            }else{
            res.send(JSON.stringify({'status': 1, 'msg': 'Image Uploaded'}));
        }
    });
});

For complete tutorial please follow link Accessing WebCam with NodeJS and save click image - TrinityTuts