[MPlayer-users] mplayer bind keys to execute command

[Jerry Geis]

I am looking how to bind a key with mplayer and execute a system command.

I found

##
## MPlayer input control file
##

RIGHT seek +10
LEFT seek -10
- audio_delay 0.100
+ audio_delay -0.100
q quit
> pt_step 1
< pt_step -1
ENTER pt_step 1 1

but I cannot find an example of how to execute a linux command one 
the RIGHT key being pressed.

Is that possible and how? THanks,

Jerry