[MPlayer-cygwin] Q: Define a key for -stereo mode while playing..

[Jenwen]

Hi there,

When starting to play KTV movie ,which oral at right channel and music at left, I use -stereo mode (0:full,1-left,2-right). 

However can I define a key in the 'input' file so that I can change between 0 and 1 while playing?

−stereo <mode> Select type of MP2/MP3 stereo output.
 0 stereo
 1 left channel 
 2 right channel

For exmples, my 'input' file

## Define a key to toggle or change stereo mode
S stereo 0
L stereo 1
R stereo 2