Update README

Author: nathan242

README.md

@@ -1,2 +1,8 @@
 # php-rtsp-client
-PHP class for working with the RTSP protocol (WIP).
+This is a PHP class for interacting with the RTSP protocol. It is still a work in progress.
+
+I started this whilst experimenting with the possibility of getting an RTSP stream from a device on the server side then transcoding it so it can be played in a webpage.
+
+This class only handles communication with the RTSP control protocol. You can activate streams on devices but you will need seperate software to receive them.
+
+If you think this is useful then please feel free to contribute.