Hardsubbing ASS onto MPEG4 I have an ASS as the subtitle stream (with these fonts: - Orotund, jagb_.tff, jagw_.ttf, JUST.ttf, Gabrielle.ttf) in an MKV.

What technique should I use to hardsub this subtitle stream onto the MPEG4 (ISO/AVC) without losing quality?

Thanks for all suggestions
I'm pretty sure it's impossible to hardcode subs without quality loss. 

Unless there's a new technique developed in the last 4 years, the file needs to be converted to a lossless type then the subs need to be coded frame by frame and then compress again. 

So: There is no technique that may be used to hardsub onto a compressed video without losing [more] quality.