1080p or 720p x264 mkv that you could not play properly before, now you can.
For those of you who have slower machines, you may want to try using CoreAVC Reports
are that CoreAVC is quite a bit more efficient than ffdshow. Be sure that if you have
ffdshow already installed and would like to use CoreAVC instead, disable h264
playback in the ffdshow control panel.
If you already have FFDShow (codec packs) install Go to start all programs K-Lite Codec Pack
Configuration ffdshow video decoder, you need to go to its video decoder settings,
click the Codecs entry in the list to the left, find the H.264/Avc
entry in the grid, and change it (by clicking on libavcodec or disabled select from drop down menu)
from "libavcodec" to "disabled" Apply Ok.
CoreAVC will now get used instead of FFDShow for H.264 decoding.