Связывать символьные клавиши для команды в Mplayer

Ответ: ДА, вы можете. Поместите привязки в файл с именем ~/.mplayer/input.config. Вот мой файл, выгруженный для вас (с моими личными модами):

    ##
    ## MPlayer input control file
    ##
    ## You are able to redefine default keyboard/joystick/mouse/LIRC bindings, or
    ## add new ones here.
    ## See DOCS/tech/slave.txt for possible commands that can be bound.
    ## Also see mplayer -input cmdlist for other possible options.
    ## The file should be placed in the $HOME/.mplayer directory.
    ##
    ## If you wish to unbind a key, use key ignore.
    ## e.g. ENTER ignore
    ##

    RIGHT seek +2
    LEFT seek -2
    DOWN volume -1
    UP volume +1
    PGUP seek 300
    PGDWN seek -300
    m mute
    # switch_audio          # switch audio streams
    + audio_delay 0.100
    = audio_delay 0.100
    - audio_delay -0.100
    [ speed_mult 0.9091 # scale playback speed
    ] speed_mult 1.1
    { speed_mult 0.5
    } speed_mult 2.0
    BS speed_set 1.0    # reset speed to normal
    q quit
    ENTER osd       #pt_step 1 1 (skip to next file (too much for an edge key))
    ESC pause
    p pause
    . frame_step            # advance one frame and pause
    SPACE pause
    HOME pt_up_step 1
    END pt_up_step -1
    > pt_step 1             # skip to next file
    < pt_step -1            #         previous
    INS alt_src_step 1
    DEL alt_src_step -1
    o osd
    I osd_show_property_text "${filename}"     # display filename in osd
    P osd_show_progression
    z sub_delay -0.1        # subtract 100 ms delay from subs
    x sub_delay +0.1        # add
    9 volume -1
    / volume -1
    0 volume 1
    * volume 1
    1 contrast -1
    2 contrast 1
    3 brightness -1
    4 brightness 1
    5 hue -1
    6 hue 1
    7 saturation -1
    8 saturation 1
    ( balance -0.1          # adjust audio balance in favor of left
    ) balance +0.1          #                                  right
d frame_drop
D step_property deinterlace  # toggle deinterlacer, requires -vf yadif or kerndeint
r sub_pos -1            # move subtitles up
t sub_pos +1            #                down
#? sub_step +1      # immediately display next subtitle
#? sub_step -1      #                     previous
#? sub_scale +0.1   # increase subtitle font size
#? sub_scale -0.1   # decrease subtitle font size
f vo_fullscreen
f11 vo_fullscreen   # to match my WinVice mod, both to match FireFox - F11 full screen
T vo_ontop              # toggle video window ontop of other windows
w panscan -0.1          # zoom out with -panscan 0 -fs
e panscan +0.1          #      in
c capturing             # save (and append) file/stream to stream.dump with -capture
s screenshot            # take a png screenshot with -vf screenshot
                        # S will take a png screenshot of every frame

h tv_step_channel 1
l tv_step_channel -1
n tv_step_norm
b tv_step_chanlist

##
## Joystick section
## WARNING: joystick support has to be explicitly enabled at
##          compiletime with --enable-joystick
##

JOY_RIGHT seek 10
JOY_LEFT seek -10
JOY_UP seek 60
JOY_DOWN seek -60
JOY_BTN0 pause
JOY_BTN1 osd
JOY_BTN2 volume 1
JOY_BTN3 volume -1
JOY_BTN4 set_menu main

##
## Apple Remote section
##
## To use OSD menu with Apple Remote, set key AR_MENU to any OSD menu command,
## or just comment out the 'AR_MENU osd' line and uncomment the line after it.
##

AR_PLAY pause
AR_PLAY_HOLD quit
AR_NEXT seek 30
AR_NEXT_HOLD seek 120
AR_PREV seek -10
AR_PREV_HOLD seek -120
AR_MENU menu up
#AR_MENU menu cancel
AR_MENU_HOLD mute
AR_VUP volume 1
AR_VDOWN volume -1

##
## OSD Menu movement keys
##
## If you are using only the keyboard it is enough to define one command (like
## "menu up"), because then that single key will display the menu, which can
## then be navigated with the cursor keys and ENTER (defined in menu.conf).
##
## LIRC users should bind each "menu" command to a button on their remote.
##
## The set_menu command directly displays the (sub)menu specified as
## its argument. Usage should be self-explanatory (although not likely
## to be needed), after reading input.conf.
##

#MOUSE_BTN0 menu up
#y menu down
#y menu ok
#y menu cancel
#y menu hide
#y set_menu general_pref

##
## DVDNAV
## Requires dvdnav://
##

UP    {dvdnav} dvdnav up          # DVDNav UP
DOWN  {dvdnav} dvdnav down        # DVDNav DOWN
LEFT  {dvdnav} dvdnav left        # DVDNav LEFT
RIGHT {dvdnav} dvdnav right       # DVDNav RIGHT
ESC   {dvdnav} dvdnav menu        # DVDNav MENU
ENTER {dvdnav} dvdnav select      # DVDNav SELECT (ok)
BS    {dvdnav} dvdnav prev        # DVDNav PREVIOUS menu (in the order chapter->title->root)

AR_VUP    {dvdnav} dvdnav up      # DVDNav UP
AR_VDOWN  {dvdnav} dvdnav down    # DVDNav DOWN
AR_PREV   {dvdnav} dvdnav left    # DVDNav LEFT
AR_NEXT   {dvdnav} dvdnav right   # DVDNav RIGHT
AR_MENU   {dvdnav} dvdnav menu    # DVDNav MENU
AR_PLAY   {dvdnav} dvdnav select  # DVDNav SELECT (ok)

#? seek_chapter -1      # skip to previous dvd chapter
#? seek_chapter +1      #         next

##
## Advanced seek
## Uncomment the following lines to be able to seek to n% of the media with
## the Fx keys.
##
#F1 seek 10 1
#F2 seek 20 1
#F3 seek 30 1
#F4 seek 40 1
#F5 seek 50 1
#F6 seek 60 1
#F7 seek 70 1
#F8 seek 80 1
#F9 seek 90 1