'XiFL', Stereo, 48.000 kHz --- NO SOUND

I was trying to open a .mkv file with the audio format
'XiFL', Stereo, 48.000 kHz
with quicktime 7
I can still see the picture, but there's just no sound.
Then I tried using VLC, iSubtitle, the results are the same - no sound.
I've got Perian DivX Flip4Mac installed. And all the other playbacks are just fine.
But this one with audio format 'XiFL', Stereo, 48.000 kHz just wouldn't make a sound...
I tried converting it to .mov and used Quicktime X to open it, it says that it can not play such a file even if it is a .mov file due to certain missing components. But previewing the .mov file is okay, with full picture, but still no sound.
I'm guessing it's some audio encoding component that I'm missing?
What's this 'XiFL' format anyway...
Please help me =. =

It could be a 'difficult' form of Matroska file. FYI Matroska is just a container like MOV or AVI, and some mkv have the video encoded with Real Video Codec (RV9 RV10). Perian+QT can't decode this, but VLC will play .mkv files just fine on OS X, as long as they don't use H.264!
It's a bit of a lottery until Matroska decide to support the Apple platform. I have found this:
http://mkv4mac.free.fr/index.php?lang=en&p=lec
which may help.
But there may be another workaround: 1. Get Info the mkv file
2. Change to extension to wmv. Save as wmv and that could work better.
Or this link may be helpful:
http://www.squidoo.com/mkv-converter-mac
Recently, a poster (ZachP14) suggested this:
"There's a program called Plex that runs .mkv files awesome on my 2.0 ghz macbook."
http://www.plexapp.com/
Maybe worth a try?

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