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?

>>12
Please read >>5 again, understand it then get back to us. The problem is not with the MKV file (assuming the MKV file is valid). MKV is a container format and NOT a codec. You need to find out which codec is being used and find out whether your media player supports demuxing AND decoding these codecs from the MKV file.