FFMPEG can do what you need, and a lot more, from the command line under Windows, OS-X & Linux. It is free, gratis & open source.
Because it is so powerful you will probably have to spend some time reading the documentation but from a given input file you can specify which video, audio and subtitle streams you wish to output, in what format.
Yes. There is a fork: https://github.com/abarnert/meteorite
Unfortunately, no released any binary files of this Meteorite forked.
I personally wanted to compile to EXE that source-codes of this fork.
Downloaded master.zip from GitHub.
Downloaded CodeBlocks & MinGW (GCC version 4.9.2).
I spent a lot of time for compile. ...