mplayer -msglevel all=6 track01.mp3

    AO: [coreaudio] Unable to initialize Output Unit component.

    sudo port install mplayer +sdl

    sudo port variants mplayer

    sudo port installed | grep mplayer

mplayer <video_file>.avi -audiofile <audio_file>.mp3

    find <music_dir> -iname '*.mp3' | mplayer -shuffle -playlist -

mplayer -cache 1024 -playlist <http://www.webstream.com>

mplayer -subcp enca:ru:utf8 film_fr.srt film_fr.mp4

mplayer -cdrom-device /dev/cdrom cdda:// -cache 5000 -ao alsa

    # cd-rom name
    cdrom="/dev/cdrom"

    # cache setting
    cache=5000

    # audio driver
    ao=alsa

    mplayer cdda://

<- 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. Pressing 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.
+ and -		Adjust audio delay by +/- 0.1 seconds.
/ and *		Decrease/increase volume.
9 and 0		Decrease/increase volume.
( and )		Adjust audio balance in favour of left/right channel.
m		Mute sound.
_ 		(MPEG-TS and libavformat only) Cycle through the available video tracks.
# 		(DVD, MPEG, Matroska, AVI and libavformat only) Cycle through the available audio tracks.
TAB 		(MPEG-TS only) Cycle through the available programs.
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.
i 		(-edlout mode only) Set start or end of an EDL skip and write it out to the given file.
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.
D 		(-vo xvmc, -vf yadif, -vf kerndeint only) Activate/deactivate deinterlacer.

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

c		Cycle through available fullscreen modes.
n		Restore original mode.

PAUSE		Pause.
STOP		Stop playing and quit.
PREVIOUS, NEXT	Seek backward/forward 1 minute.

ENTER	Start playing.
ESC	Stop playing.
l	Load file.
t	Load subtitle.
c	Open skin browser.
p	Open playlist.
r	Open preferences.

h and k	Select previous/next channel.
n	Change norm.
u	Change channel list.

keypad 8	Select button up.
keypad 2	Select button down.
keypad 4	Select button left.
keypad 6	Select button right.
keypad 5	Return to main menu.
keypad 7	Return to nearest menu (the order of preference is: chapter->title->root).
keypad ENTER	Confirm choice.

X		Switch teletext on/off.
Q and W		Go to next/prev teletext page.

button 3 and button 4	Seek backward/forward 1 minute.
button 5 and button 6	Decrease/increase volume.

left and right	Seek backward/forward 10 seconds.
up and down	Seek forward/backward 1 minute.
button 1	Pause.
button 2	Toggle OSD states: none / seek / seek + timer / seek + timer + total time.
button 3 and button 4	Decrease/increase volume.