How do I change the default configuration of MPlayer movie player?

[Steven Vollom]

> mplayer -monitoraspect 16:9 %u

Here are some attempts I made trying to set a default monitor aspect ratio of 
16:9.  Please see if you can make a recommendation that might work?  Thanks!

StevenMPlayer 1.0rc2-4.2.3 (C) 2000-2007 MPlayer Team
CPU: Intel(R) Pentium(R) 4 CPU 2.26GHz (Family: 15, Model: 2, Stepping: 4)
CPUflags:  MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.

Playing %u.
File not found: '%u'
Failed to open %u.


Exiting... (End of file)
steven at Studio25:~$ mplayer -monitoraspect 16:9
MPlayer 1.0rc2-4.2.3 (C) 2000-2007 MPlayer Team
CPU: Intel(R) Pentium(R) 4 CPU 2.26GHz (Family: 15, Model: 2, Stepping: 4)
CPUflags:  MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
Usage:   mplayer [options] [url|path/]filename

Basic options: (complete list in the man page)
 -vo <drv>        select video output driver ('-vo help' for a list)
 -ao <drv>        select audio output driver ('-ao help' for a list)
 vcd://<trackno>  play (S)VCD (Super Video CD) track (raw device, no mount)
 dvd://<titleno>  play DVD title from device instead of plain file
 -alang/-slang    select DVD audio/subtitle language (by 2-char country code)
 -ss <position>   seek to given (seconds or hh:mm:ss) position
 -nosound         do not play sound
 -fs              fullscreen playback (or -vm, -zoom, details in the man page)
 -x <x> -y <y>    set display resolution (for use with -vm or -zoom)
 -sub <file>      specify subtitle file to use (also see -subfps, -subdelay)
 -playlist <file> specify playlist file
 -vid x -aid y    select video (x) and audio (y) stream to play
 -fps x -srate y  change video (x fps) and audio (y Hz) rate
 -pp <quality>    enable postprocessing filter (details in the man page)
 -framedrop       enable frame dropping (for slow machines)

Basic keys: (complete list in the man page, also check input.conf)
 <-  or  ->       seek backward/forward 10 seconds
 down or up       seek backward/forward  1 minute
 pgdown or pgup   seek backward/forward 10 minutes
 < or >           step backward/forward in playlist
 p or SPACE       pause movie (press any key to continue)
 q or ESC         stop playing and quit program
 + or -           adjust audio delay by +/- 0.1 second
 o                cycle OSD mode:  none / seekbar / seekbar + timer
 * or /           increase or decrease PCM volume
 x or z           adjust subtitle delay by +/- 0.1 second
 r or t           adjust subtitle position up/down, also see -vf expand

 * * * SEE THE MAN PAGE FOR DETAILS, FURTHER (ADVANCED) OPTIONS AND KEYS * * *

steven at Studio25:~$ mplayer -monitoraspect -x 16 -y 6
MPlayer 1.0rc2-4.2.3 (C) 2000-2007 MPlayer Team
CPU: Intel(R) Pentium(R) 4 CPU 2.26GHz (Family: 15, Model: 2, Stepping: 4)
CPUflags:  MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
The monitoraspect option must be a floating point number or a ratio 
(numerator[:/]denominator): -x
Error parsing option on the command line: -monitoraspect
steven at Studio25:~$ mplayer -monitoraspect -x/16 -y/9
MPlayer 1.0rc2-4.2.3 (C) 2000-2007 MPlayer Team
CPU: Intel(R) Pentium(R) 4 CPU 2.26GHz (Family: 15, Model: 2, Stepping: 4)
CPUflags:  MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
The monitoraspect option must be a floating point number or a ratio 
(numerator[:/]denominator): -x/16
Error parsing option on the command line: -monitoraspect
steven at Studio25:~$ mplayer -monitoraspect -x <16> -y <9>
bash: syntax error near unexpected token `16'
steven at Studio25:~$         

Steven