I downloaded two different versions of an anime movie; one that is in 720p, but has the English audio track, and one that is in 1080p, but has only the Japanese audio track, with subtitles. I want to rip the English audio track from the 720p version, and add it to the 1080p version. Obviously, both the files are the same length, so synchronization should not be a problem, as far I can assume. How would I go about doing this?
