title: XHR blob size limit
body: <p>I'm having a little trouble regarding a blob upload through xhr.send(Blob). I have a website in which a user creates a video via getUserMedia() which is placed inside my website trough a blob, they can record multiple times until they feel satisfied with the video result. I want them to give the user the ability to upload the video to a server without them downloading the file and then using a form to upload the video. So I managed to make this through xhr.send</p>
  
  <pre><code>function sendXHR(){
  var xhr = new XMLHttpRequest();
  var video=$("#myexportingvideo");
  xhr.open('GET', video.src , true);
  xhr.responseType = 'blob';
  xhr.onload = function(e) {
    if (this.status == 200) {
      // Note: .response instead of .responseText
      var blob = new Blob([this.response], {type: 'video/webm'});
      console.log(blob.size/1024);
      console.log(blob.type);
  
      form = new FormData(),
      request = new XMLHttpRequest();
      form.append("myblob",blob,"Capture.webm");
      request.open(
                  "POST",
                  "../TryExtension/upload_file.php",
                  true
              );
      //request.send(blob);
      request.send(form);
    }
  };
  xhr.send();
  }
  </code></pre>
  
  <p>The problem is that when blobs are approx bigger than 1.8 MB in size the data sent is 0, so basically my question is, Is there a limit in the blob size or i have to send the blob in chunks to the server?
  An example of the issue is the following.</p>
  
  <hr>
  
  <p>Console Log</p>
  
  <pre><code>   frames captured: 32 =&gt; 1.077s video vid.js:155
     XHR finished loading: "blob:http%3A//localhost/19d162ae-c22e-48af-a83d-2ddd579ffff9". vid.js:240
     1199.46484375 vid.js:225
     video/webm vid.js:226
     XHR finished loading: "http://localhost/TryExtension/upload_file.php". vid.js:237
     frames captured: 91 =&gt; 3.052s video vid.js:155
     XHR finished loading: "blob:http%3A//localhost/c7d4f3c6-88c8-43c5-9adb-b9060c93bfb3". vid.js:240
     3402.873046875 vid.js:225
     video/webm vid.js:226
     XHR finished loading: "http://localhost/TryExtension/upload_file.php". 
  </code></pre>
  
  <p>The first video is uploaded correctly but the next one is uploaded with 0 bytes of information.
  Thanks in advance for all your help.</p>