I have a wedding video produced by a professional company with a strange audio stream (they offer a converting service - but at a very high price).
avidemux tells me that i sees more than one audiostream and that i should select one, but in the selection window is only one selection (AC3 - 6 channels). ffmpeg shows me two streams, an ac3 5.1 channels and a ac3 0 channels. How can i convert it to a single mp2-stream? I think it's an mono signal only - no stereo.