GStreamer Daemon, also called gstd, is a GStreamer framework fore controlling audio and video streaming using D-Bus messages. Qt applications, web interfaces, and GStreamer element test suites show different ways the framework can be utilized. GStreamer Daemon is gst-launch on steroids where you can create a GStreamer pipeline, play, pause, change speed, skip around, and even change element parameter settings all while the pipeline is active.