Subtitles running quicker than the video
 

Recently I started noticing that some, but not all, subtitles in mkvs I play on MPC tend to run faster than the actual dialogue they're supposed to sub. This only happens on MPC but not when I use VLC, but I prefer using MPC since it's lightweight and takes screencaps easier.

This happens only on some videos consistently. Other videos, when the subtitles are on par with the dialogue, always work properly. This also started happening when mkvs started on 10bit. Anyone got a good workaround.

Is your MPC and/or codec pack up-to-date? This has happened to me once before, and the problem was resolved after I updated the MPC to the newest version.

Yeh it's always up to date...

Is your PC too slow to decode 10 bit H.264 in real-time?
Try using xy-vsfilter for subtitles as suggested here and use a fast video decoder, like LAV Video.
There should also be a lot of suggestions in the Hi10p thread.

I run an i5, so unless a core is busted it shouldn't even be a problem.

Gonna try out those codecs as you suggested.

You can always give smplayer a try. Mplayer comes with its own codecs so it won't interfere with CCCP or other codecs you may have installed. If that doesn't help, try replacing mplayer with mplayer2. There's a Windows version for that as well. (You can keep smplayer itself since it's just a GUI shell for mplayer.)

Thanks for the advice. Just realized that for some reason VSfilter wasn't autoloading in my CCCP settings. Turned it back on and the subtitles work again. Thanks.