Blu-ray .mkv files won't play both audio and video at the same time

[birdbrainblue]

So the other day, I downloaded torrents of the Blu-ray version of an anime I like onto my Macbook Pro. I've tried to play them on multiple media players, but none of them work.

VLC - audio plays, but the video is just a blank green screen.

Quicktime - says I need Quicktime 7.

Quicktime 7 - plays video, but claims I need an upgrade of some sort to play the audio as well. It doesn't tell me what that upgrade is.

DivX Plus Player - same, plays video but not audio. According to this media player, "This file contains a track in an unknown format (code "4294967295") format. You may need to install a QuickTime™ component for this audio format in order to hear the soundtrack of this file." Again, it doesn't tell me what exactly I need.

Does anyone know how to help me?

[Baldrick]

Try mplayer, http://www.mplayerosx.ch/

[birdbrainblue]

Hey, that's perfect. Thanks!