Enable ASS/SSA rendering through libass in mencoder. This duplicates a
bit of code (to parse font attachments, for example). Additionally, add
a filter "fixpts" that generates PTS, simulating fixed fps. PTS
generated by this filter are then used for subtitle timing.
Original patch by Nicolas George. (nicolas.george normalesup.org)
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@30849 b3059339-0415-0410-9bf9-f77b7e298cf2
