DTS sound track Panasonic GT30

When I play a .mkv with a DTS sound track the video stutters and the sound does not play. Is there a profile tweak for GT30 that fixes this?

Also

I have some .mkv files that are "format profile : High@L5.1" and those seem to stutter audio and video. Is there a profile tweak for GT30 that fixes this?

I was able to have DTS transcoded to AC3 (with the existing 2011a veria profile) however had the aspect ratio of the video changed in the process. Not that I mind the cropping, however ffmpeg.exe seems to eat all my cpu even after i've stopped viewing trascoded video/audio though. I've found out how to convert DTS to AC3 and add it as the default audio track in the .MKV. That works perfectly using Xilisoft to convert and mkvmerge to add the newly converted AC3 track. This seems to be the best way to solve this problem on the GT30.

I was able to trascode the format profile : High@L5.1 content however I don't think my athlon 2.5ghz single core will do the job.

I've got some new hardware that should fix that for me.