Psp converters that can selectively choose audio and subtitle in mkv/ogm containers?

anybody know the NAME(s) of any psp video converting software that can selectively choose the audio and subtitle from a container file like ogm or mkv? i’ve tried riverpast but it just doesn’t work… crashes a lot and sometimes would not run. i’m currently using ALLOK but i have to demux the subtitle/audio using another program. that just takes too long.

dvd fab is amazing but only works for dvds. i need something that can work with container files.

thanks

nobody owns a psp?