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Nokia-N810-43-7:~# mplayer
MPlayer dev-SVN-rUNKNOWN-3.4.4 (C) 2000-2008 MPlayer Team
CPU: ARM
Internet Tablet OS version: RX-34+RX-44+RX-48_DIABLO_5.2008.43-7_PR_MR0

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 * * *

Nokia-N810-43-7:~# mplayer -ao help
MPlayer dev-SVN-rUNKNOWN-3.4.4 (C) 2000-2008 MPlayer Team
CPU: ARM
Internet Tablet OS version: RX-34+RX-44+RX-48_DIABLO_5.2008.43-7_PR_MR0

Available audio output drivers:
alsa ALSA-0.9.x-1.x audio output
esd EsounD audio output
gst Gstreamer audio output for Nokia 770
sdl SDLlib audio output
mpegpes Mpeg-PES audio output
null Null audio output
pcm RAW PCM/WAVE file writer audio output

Nokia-N810-43-7:~# mplayer -vo help
MPlayer dev-SVN-rUNKNOWN-3.4.4 (C) 2000-2008 MPlayer Team
CPU: ARM
Internet Tablet OS version: RX-34+RX-44+RX-48_DIABLO_5.2008.43-7_PR_MR0

Available video output drivers:
xv X11/Xv
x11 X11 ( XImage/Shm )
xover General X11 driver for overlay capable video output drivers
sdl SDL YUV/RGB/BGR renderer (SDL v1.1.7+ only!)
omapfb Nokia 770 video driver
null Null video output
mpegpes Mpeg-PES file
yuv4mpeg yuv4mpeg output for mjpegtools
png PNG file
jpeg JPEG file
md5sum md5sum of each frame

Nokia-N810-43-7:~#