[MPlayer-users] Shifting SSA subtitles

[Ergzay]

Is there a way short of editing the .ssa file to shift the subtitles  
around the video to a specific position? Preferably this would shift  
all subtitles. I am using -vf expand and ssa seems to treat the  
expanded area as the new video size. The preferred look would be that  
the subtitles appeared exactly where they would in the video as if i  
hadn't used -vf expand. I don't mind doing this manually, I just want  
some way of doing it. Is this possible?