[MPlayer-users] OSX: disable "auto-sleep" while playing a video?

[gabor]

hi,

i use mac osx.

the problem is that when i'm watching something in mplayer, the system 
seems to interpret it as 'nothing is happening', and acts accordingly:

1. lowers the brightness of the screen after some time
2. probably would later turn off the display, but i never wait so long.


after #1, simply moving the cursor around a little helps, but it gets a 
little annoying after some time.

for me this seems to be the standard problem as i had in linux with the 
screensaver jumping in.

is there anything to solve this on  mac-osx?

or to reformulate:
what are other mac-osx users doing in this situation?

thanks,
gabor