mplayer -sws 0 -zoom file

keyboard control
<- and ->	 Seek backward/forward 10 seconds.
up and down	 Seek forward/backward 1 minute.
pgup and pgdown	 Seek forward/backward 10 minutes.
[ and ]		 Decrease/increase current playback speed by 10%.
{ and }		 Halve/double current playback speed.
backspace	 Reset playback speed to normal.
< and >		 Go backward/forward in the playlist.
ENTER		 Go forward in the playlist, even over the end.
HOME and END	 next/previous playtree entry in the parent list
INS and DEL (ASX playlist only)		 next/previous alternative source.
p / SPACE	 Pause (pressing again unpauses).
.		 Step forward. Once will pause movie, every consecutive press will play one frame and then go into pause mode again (any other key unpauses).
q / ESC		 Stop playing and quit.
U		 Stop playing (and quit if -idle is not used).
+ and -		 Adjust audio delay by +/- 0.1 seconds.
/ and *		 Decrease/increase volume.
9 and 0		 Decrease/increase volume.
( and )		 Adjust audio balance in favor of left/right channel.
m		 Mute sound.
f		 Toggle fullscreen (also see -fs).
T		 Toggle stay-on-top (also see -ontop).
w and e		 Decrease/increase pan-and-scan range.
o		 Toggle OSD states: none / seek / seek + timer / seek + timer + total time.
d		 Toggle frame dropping states: none / skip display / skip decoding (see -framedrop and -hardframedrop). 
v		 Toggle subtitle visibility.
j		 Cycle through the available subtitles.
y and g		 Step forward/backward in the subtitle list.
F		 Toggle displaying "forced subtitles".
a		 Toggle subtitle alignment: top / middle / bottom.
x and z		 Adjust subtitle delay by +/- 0.1 seconds.
r and t		 Move subtitles up/down.
s (-vf screenshot only)	 Take a screenshot.
S (-vf screenshot only)	 Start/stop taking screenshots.
I		 Show filename on the OSD.
! and @		 Seek to the beginning of the previous/next chapter.
o		 Turn on/off OSD (to see how much time has elapsed - how much is remaining)

Hardware Accel
1 and 2		 Adjust contrast.
3 and 4		 Adjust brightness.
5 and 6		 Adjust hue.
7 and 8		 Adjust saturation.