No Sound! Which codec I need?

[25minutes]

I downloaded two hdtv samples from the link below:

http://movies.apple.com/movies/fox/i...-tsr_h720p.mov
http://movies.apple.com/movies/fox/i...tsr_h1080p.mov

On my pc, quicktime is installed, and I can play both samples properly.
However, when I use bsplayer (latest version) on the same box to play the samples, there's no sound!

This sounds strange to me, because I thought bsplayer should be able to use quicktime codecs automatically. Pls correct me if I'm wrong.

Also, is there any way I can find out what codec I need? Or how could I fix this issue?

[adicoto]

Just downloaded one file. Playing OK using CoreAVC and CoreAAC filters.