Originally Posted by artem
mplayer and all (lib)xine based players
I am *very* sure mplayer doesn't support readback. No idea about xine, but I don't think it does either. And even if it does, xine is a playback-only library, so not useful for transcoding.
The only app I know which supports readback is VLC, but I have no idea how sophisticated VLC's transcoding abilities are.