GtkObject
  GstObject
    GstElement
      GstBin
        GstPipeline
        GstThread
      GstTee
      GstFakeSrc
      GstFakeSink
      GstDiskSrc
      GstAsyncDiskSrc
      GstHttpSrc
      GstFdSrc
      GstAudioSrc
      GstSineSrc
      GstAudioSink
      GstFdSink
      GstPipefilter
      GstIdentity
      GstQueue
      GstTypeFind
    GstPad