I am using Tmpg Enc Tools, which allows me to add Mpeg and AC-3 Audio files to a Video file but when i try to Multiplex a LPCM Audio file to an M2v Video file it isn't able to do it cos it doesn't support it. I have also tried to do it with Tmpg Enc Dvd Author which allows a LPCM Audio file to be attached to a Video file, but when you click on OK, the size of the File shows up as being 1.4 Gig when it should only be about 200 or 300 MB. So is there any software that will enable me to Mux a PCM Audio file to a Video file or am i just doing something wrong? Thanks.