Got a swag of MP4 files that have two audio streams - one in Russian, the other in English. I can switch between the streams easy enough in vlc, but I want to use iTunes to manage my (rather large) video catalouge. (And before you ask I'm using Windoze, not a Mac) iTunes of course loves mp4, but curiously will play BOTH audio streams at the same time. I've scoured the net looking for a way to toggle between the two using iTunes but alas no joy. My question is, is there a way to strip out/delete the unwanted audio track? I've got a sinking feeling this will mean re-transcoding gigs of stuff (which I'm still fairly new too) but if anyplace has an easier/better solution, it's here! Many thanks for any assistance.