MPlayer/sharpen video filter
< MPlayer
change the value 8 to other number, <0 makes image blur, >0 makes it sharpen
mplayer -vf-add unsharp=lc:8 "video.extension"
change the value 8 to other number, <0 makes image blur, >0 makes it sharpen
mplayer -vf-add unsharp=lc:8 "video.extension"