I used Videostudio 6 to add a fade-in to the beginning of a .m2v clip and it made the clip longer than the original forcing me to edit the audio to match.
I muxed the m2v & mp2 files and repeated the procedure but when I demuxed and imported the files into DVDMaestro the mp2 file was shorter than the m2v and sounded like the audio was on Helium.
Clueless in K.C.