I have several terabytes of H246 MP4 video with 2 audio tracks. The 1st track contains a left and right channel. The left channel is one language. The right channel is a second language. The 2nd track is a third language in the left channel. What I need is to extract the left and right from track 1 as well as the left channel from track 2 and then save the 3 to separate tracks. Example: Video Track 1: left-english mono, right-french mono Track 2: left-spanish mono New file: Video Track 1: English - left/right mono Track 2: French - left/right mono Track 3: Spanish - left/right mono Is this possible with any current tools and if so how would I go about doing this?