The .avi video that I'm playing was playing fine before I realized that there were no subtitles. So i downloaded a subfix and vobsub and ffdshow. It seems that ffdshow did not work, but vobsub did. However, although vobsub showed the subtitles, the video started stuttering so it's unwatchable. Now, I uninstalled both, and I now have no subtitles and it still stutters! Please help.