       @__setState('recording')
 
       @__chunks = []
-      __recorderOptions = {
-        mimeType: 'video/webm'
-      }
+      __recorderOptions = {}
 
       if @settings.audioBitsPerSecond != null
         __recorderOptions.audioBitsPerSecond = @settings.audioBitsPerSecond


      @__recorder.onstop = =>
        blob = new Blob(@__chunks, {'type': @__recorder.mimeType})
        blob.name = "record.webm"
        @dialogApi.addFiles('object', [[blob, {source: 'camera'}]])
        @dialogApi.switchTab('preview')
        @__chunks = []


      @__recorder.stop()
      @__chunks = []

    __guessExtensionByMime: (mime) ->
      known_containers = {
        'mp4': 'mp4',
        'ogg': 'ogg',
        'webm': 'webm',
        'quicktime': 'mov',
        'x-matroska': 'mkv',
      }
      # e.g. "video/x-matroska;codecs=avc1,opus"
      if mime
        # e.g. ["video", "x-matroska;codecs=avc1,opus"]
        mime = mime.split('/')
        if mime[0] == 'video'
          # e.g. "x-matroska;codecs=avc1,opus"
          mime = mime.slice(1).join('/')
          # e.g. "x-matroska"
          container = mime.split(';')[0]
          # e.g. "mkv"
          if known_containers[container]
            return known_containers[container]
      # In all other cases just return the base extension for all times
      return 'avi'
