GStreamer Motion Detector Plugin
================================
This is a simple GStreamer plugin that detects motion in a video
stream in a Gstreamer pipeline. The element has one sink pad and
one source pad, both only support 24-bit RGB formats.
Connect the element inline with your video stream and either watch
the elements `notify::motion-detected` signal or watch for application
bus messages containing motion information.
The plugin uses OpenCV to find moving blobs against an averaged
background scene. It's not super-robust but it's still quite
accurate. You can tweak the element properties to improve detection
somewhat.
Here's a sample pipeline:
$ gst-launch -v --gst-plugin-path=$PLUGIN_PATH \
autovideosrc ! \
video/x-raw-rgb ! \
motiondetector draw_motion=true rate_limit=500 ! \
ffmpegcolorspace ! \
queue ! \
autovideosink