The short list for mplayer’s most used hotkeys.
<- and –> Seek backward/forward 10 seconds.
up and down Seek forward/backward 1 minute.
pgup and pgd 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
p / SPACE Pause (pressing again unpauses).
. Step forward.
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 favor of left/right channel.
m Mute sound.
_ or # Cycle through the available video tracks.
f Toggle fullscreen (also see -fs).
w and e Decrease/increase pan-and-scan range.
o Toggle OSD states
d Toggle frame dropping states
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 Show filename on the OSD.
! and @ Seek to the beginning of the previous/next chapter.
D Activate/deactivate deinterlacer.