updated readme with --help

README.md

@@ -1,6 +1,24 @@
 # RTSP replay server
 
-RTSP replay server exmaple mirrored from [gst-rtsp-server](https://gitlab.freedesktop.org/gstreamer/gst-rtsp-server).
+[gst-rtsp-server](https://gitlab.freedesktop.org/gstreamer/gst-rtsp-server) replay loop example fork with added port and mount point parsing.
 
-## Todo
-- ratelimit output options
+
+```bash
+Usage:
+  rtsp-replay-server [OPTION?] RTSP Replay Server
+
+Help Options:
+  -h, --help                        Show help options
+  --help-all                        Show all help options
+  --help-gst                        Show GStreamer Options
+
+Application Options:
+  --uri                             uri or file to stream (required)
+  --num-loops                       The number of loops (default = -1, infinite)
+  --port                            port to serve on (default = '8554')
+  --mount                           mount point of server (default = '/test')
+
+```
+
+
+Ratelimit output option to be added in the future