SMPlayer and MKV Files

So I've been spending the better part of the day trying to figure out how to make the shittastic MKV format work on my computer again (sometime between when I was watching Gurren Lagann and today it decided to go back to its old video lag shenanigans). Everywhere I go tells me that SMPlayer is an MKV player, and the SMPlayer website has an MKV file being played right there on a screenshot just to show how great it is at playing MKV files. So I load an MKV file into the player... and it plays a whole millisecond of audio with no image and then ceases playing. What the fuck is this shit?

>>14
MKV is a container and not a codec. This explains why one can play one MKV file and not another - the media player might not be able to handle to codecs contained within the container. You can contain WMV + MP3 streams within an MKV container. You can contain an XVID + WAV streams within an MKV container. You can contain Theora + Monkey Audio streams within an MKV container. You can contain h.264 + Quicktime Audio streams within an MKV container. You can contain Theora + Flac streams within an MKV container. >>1 needs to find out which codec combination is contained within the MKV container. Then >>1 needs to find out if the media player supports decoding and demuxing this combination.