Hi!
The command line parameters cannot be typed in the application address bar. They must be used when invoking the application from the command line, a shortcut, or from a batch file.
Are you using Windows? If so, you could create a shortcut of the application on your desktop, and modify the shortcut properties.
In the target box, you could type the command line parameters. For example:
“C:\Program Files (x86)\Rtsp Player\rtspplayer.exe” -a rtsp://224.137.129.18:554/live001/adr.sdp user pass