I've manually created a stereo mixdown oft some 5.1 DTS tracks. Now I would like to add the new audio track to the original movie file, without dropping the old audio tracks.
My problem appears to be that I either miss to hand ffmpeg the correct mapping of the tracks (the file has a two audio tracks already and a number of subtiles, which appear to count too), so that I receive the "Number of stream maps must match the number of output streams" (quoted from memory), or I even geht the whole stream/map concept wrong.
Is there any good explanation for what I'm trying to do? I'd even read a whole text about the topic, the documentation in ffmpeg.org just isn't that helpful in this case.
To be more specific: I want to know if there is any way to make ffmpeg display the actual stream mapping of a file and how can I merge my stereo track into it?
Everything I've found so far deals with silent videos vor replacling an audio track, which is not what I want to do.