#screenw=848 ----修改此處
#screenh=480 ----修改此處
monitor-hfreq=31.468k-68.681k
monitor-vfreq=56.25-85.08
input=file=/var/mp_control
bgvideo=/usr/share/mplayer/background-audio.avi
cp-render-type=5
cp-encoding=/usr/share/mplayer/font/encoding
#subfont-blur=1
#subfont-outline=2
subfont-autoscale=2
subfont-text-scale=5
subfont-osd-scale=5
#auto expand to 16:9
#vf=expand
aspect=1.766
#auto expand to 16:9
font=/usr/share/mplayer/font/font.ttf

這樣也可以