Although there's sound in VLC but front row doesnt support it n i use front row all the time
Any1 can help ?? Thanks in advance

i'm also facing the same problem and like to know how to solve it

this cause of missing audio codec...need to chk wht is the missing codec...
sometime installing perian might helps...

http://perian.org/

yeah perian will help u a lot. if not mistaken the missing audio code will be AC3. hehe

And you will need to reinstall Perian if you recently upgraded/updated Quicktime.

i tried n it became worse.....now my avi file cant even launch due to an error in perian....n theres another codec called ac52 which suggests me to uninstall perian which has ac3......but still cant work.....whenever i open some avi files...it keeps poppin up da component download thingy...but da thing is i dunno wats missin so how 2 download z??

Would suggest you remove Quicktime & Perian totally, and reinstall Quicktime followed by Perian. Perian should be all you need.

if u already installed perian, go to system preference, it should be a perian icon there. click on it and click the about perian tab. scroll down and u can c A52Codec is supported. should be running. erm remove ur QuickTIme and perian. reinstall both. have a try. but not sure working or not.

Perian aims at providing a single package to provide all your playback needs. It is a collection of QuickTime components incorporating several libraries:
. libavcodec, from the ffmpeg project, along with code from the old FFusion component:
. MS-MPEG4 v1 & v2
. DivX
. 3ivX
. H.264
. FLV1
. FSV1
. VP6
. H263I
. VP3
. HuffYUV
. ffvhuff
. MPEG-1 & 2 video
. FRAPS
. Windows Media Audio v1 & v2
. Flash ADPCM
. Xiph Vorbis (in Matroska)
. MPEG Layer II Audio
. libavformat, from the ffmpeg project. along with AVIImporter.component:
. AVI file format
. FLV file format
. libmatroska, along with matroska-qt.component:
. MKV file format
. Subtitle parsing
. SSA
. SRT
. liba52, via A52Codec
. AC3 audio

The code is available under the LGPL. The project site is located at <http://trac.perian.org/> and the project subversion repository is located at <http://svn.perian.org/>.
The code for A52Codec is available under GPL. The project site is located at <http://trac.cod3r.com/a52codec/> and the project subversion repository is located at <http://svn.cod3r.com/a52codec/>.