stream.js

/*
*   Get mediastream
*/
var userStream;
navigator.getUserMedia = ( navigator.getUserMedia ||
                       navigator.webkitGetUserMedia ||
                       navigator.mozGetUserMedia ||
                       navigator.msGetUserMedia);
 
if (navigator.getUserMedia) {
   navigator.getUserMedia (
 
      // constraints
      {
         video: true,
         audio: true
      },
 
      // successCallback
      function(localMediaStream) {
        
        // Assign mediastream to global variable
         userStream = localMediaStream;

         var video = document.querySelector('video');
         video.src = window.URL.createObjectURL(localMediaStream);
         // Do something with the video here, e.g. video.play()
      },
 
      // errorCallback
      function(err) {
         console.log("The following error occured: " + err);
      }
   );
} else {
   console.log("getUserMedia not supported");
}



/*
*   To remove Audio Track
*/

var audioTrack = userStream.getAudioTracks();
 
if (audioTrack.length > 0) {
 
    userStream.removeTrack(audioTrack[0]);
 
    var video = document.querySelector('video');
    video.src = window.URL.createObjectURL(userStream);
 
}


/*
*   To remove Video Track
*/

var videoTrack = userStream.getVideoTracks();
 
if (videoTrack.length > 0) {
 
    userStream.removeTrack(videoTrack[0]);
 
    var video = document.querySelector('video');
    video.src = window.URL.createObjectURL(userStream);

    // Option-1
    $('video').css('display', 'none');

   // Option-2
   var audio = document.querySelector('audio');
   audio.src = window.URL.createObjectURL(userStream);
 
  $('video').attr('src', '');

}