I have managed to download a movie with the subtitles already on, and not on a separate srt file, every time i try to convert the MKV movie file to MPG in order to create a DVD with the subs, Burn says its decoding sound and creates a wav file of the audio, I have used burn many times and have not come across this before, I have not altered any of the preferences, can anyone explain to me what is going on PLEEEEEESE.