I recently attempted converting a movie with the nightly version of handbrake and the resulting mp4 file does not seem to have any subtitles. I selected a few subtitle tracks I wanted and chose not to burn them in, in hopes that I could select the subtitle track I wanted. Yet, none of these tracks made it through to the final file. Is it possible to make the subtitles from a blu ray mkv selectable in an mp4 file, or do you have to burn them in? Really, I just want to be able to have the forced subtitles burned in, but I am afraid to use the foreign audio search and screw up a bunch of rips by burning in subtitles!