Rock Player - MKV Issues

[JaredC01]

Just curious if anyone else is having stuttering issues when playing DVD rips in MKV format? Before you suggest re-encoding, my whole movie collection is in MKV format, and I'm not about to rip them all again into MP4 or re-convert them from MKV into MP4.

I'm wondering if it may be an SD card issue (being only a class 2 card) as well, though 480p video shouldn't use up that much card bandwidth...