How to play 720p/1080p MKV&DivX without videolag and subtitles by Tim2k:
1. Deinstall all kinds of shitty codecpacks from your system, they are useless and ruin everything. If u want to play exotic codecs, just use VLC-Player from videolan.org, it has inbuild videodecoders but not allways the highest performance&quality.
2. Copy "mplayerc.exe" to your Programfolder under "C:\" and START IT and close it (important!).
3. Install "XviD-1.1.3-28062007.exe"
4. Install "MatroskaSplitter.exe"
5. Run "CoreAVC-Decoder 1.5\Install.bat"
6. Restart your Computer.
7. Start MPC and check "View--->Options--->Playback--->Output--->DirectShow--->VMR9 (renderless)" .
8.Go to "View--->Options--->External Filters--->Add Filter" and doubleclick "CoreAVC Video Decoder", make sure it's checked.
9. Check "View--->Options--->Subtitles--->Override placement" and set "Horizontal" to 50% and "Vertical" to 98%.
10. Press "OK" and restart MPC.
Now you should be able to play MKVs without any videolag, if there's a problem, just contact me.