title: RecordRTC recording crash
body: <p>According to the RecordRTC author mediarecorder api is already supported in chrome >= version 49</p>
  
  <p>i download version 50 to test the features.</p>
  
  <p>Any recording &lt; 5mins result in chrome Canary crashing. how can i solve the problem?</p>
  
  <pre><code>audioRecorder = RecordRTC(stream, {
                      recorderType: StereoAudioRecorder,
                      bufferSize: 16384,  // mandatory: if 720p output is forced. otherwise: optional default buffersize 16384
                      //sampleRate: 22050, // default samplerate 48000
                  });
  
                  videoRecorder = RecordRTC(stream, {
                      type: 'video', 
                      frameInterval: 90,
                      canvas:  {
                                width: 1280,
                                height: 720
                      }
                  });
  
                  videoRecorder.initRecorder(function() {
                      audioRecorder.initRecorder(function() {
                          audioRecorder.startRecording();
                          videoRecorder.startRecording();
                      });
                  });
  </code></pre>