Comment 4 for bug 611912

Sorry, I mistake. Here uau answer:
<uau> you can't independently select subtitle rendering resolution just like that
<uau> xv for example does not support modifying the output after scaling
<uau> (an application can't give a video frame to xv, have xv do the scaling, and then add subtitles at scaled resolutiono)
<uau> so if you use -vo xv then subtitles can only be added at scaled resolution if you use software scaling before giving the frame to xv

So, then maybe add software scaling options to separate tab to configuration section Advanced? Or just checkbox "Do software scaling to desktop size (if used xv output)" to General Video settings? (it's also solve subtitle problem for xv)

P.S. I know, with OpenGL output there is no problems with subtitles, but OpenGL currently not work with nouveau, and can't be used for FullHD-video and video with high bitrate on non-fast hardware.