title: how to send EOS message to the bus
body: <p>ok, I have something like this:</p>
  
  <pre><code>    self.pipeline = gst.Pipeline()
  
      self.tee = gst.element_factory_make
  
      self.source = gst.element_factory_make('subdevsrc')
      self.source.set_property('viewfinder-mode', 1)
      self.source.set_property('camera-device', 1)
  
      self.capsfilter = gst.element_factory_make('capsfilter')
      caps = 'video/x-raw-yuv, width=640, height=480'
      self.capsfilter.set_property('caps', gst.caps_from_string(caps))
  
      self.tee = gst.element_factory_make('tee')
  
      self.queue1 = gst.element_factory_make('queue')
      self.queue2 = gst.element_factory_make('queue')
  
      self.encoder = gst.element_factory_make('dsphdmp4venc')
      self.muxer = gst.element_factory_make('mp4mux')
      self.imagesink = gst.element_factory_make('xvimagesink')
  
      self.filesink = gst.element_factory_make('filesink')
      self.filesink.set_property('location', '/dev/null')
  
      self.pipeline.add(self.source, self.capsfilter, self.tee, self.queue1, self.queue2, self.encoder, self.muxer, self.imagesink, self.filesink)
      gst.element_link_many(self.source, self.capsfilter, self.tee, self.queue1, self.imagesink)
      gst.element_link_many(self.tee, self.queue2, self.encoder, self.muxer, self.filesink)
  
      self.bus = self.pipeline.get_bus()
  </code></pre>
  
  <p>I want to stop (EOS) the stream in ready state, change the location and so..
  help?</p>
  
  <p>self.bus.emit('eos')
  gives me TypeError: : unknown signal name: eos</p>