I wanted to give a heads up about some additions I've made recently. The existing code has long permitted the selection of audio tracks and subtitles for non-disc playback. We have had no place in the user interface to make selections so far. For me this has been frustrating, I really enjoy 'foreign' or 'subtitled' movies. To that end I have added buttons to UI1 that allow the cycling of the audio tracks or subtitle tracks that exist in a playing media file. They are hidden away on the UI1 'Zoom & Aspect' menu.
There is no feedback on the UI for the currently selected tracks, nor for any listing of available tracks. I hope to provide this functionality at some point but there is a lot that goes into making that happen in the old Orbiter UI. So for now, you can change audio tracks and subtitle tracks in playing media files.
I would also like to point out that this functionality works within both Xine_Player AND (on regular MDs) and in OMX_Player (on Raspberry Pi MDs).
Like I said, I hope to extend this to make it more user friendly. For now the capability is there for those that have been requiring or missing it.
This is available for 1204 (precise) ubuntu and on raspbian (wheezy). apt-get update && apt-get dist-upgrade then reload your router to get the functionality.