QT won't open .avi files...

I just made a knew thread before but I couldn't edit it. Maybe it was .avi files and not .div files QT couldn't open. I changed it by mistake and couldn't remember which it was. Anyway, can someone help me with what codecs I need?
Thanks!

AVI is just a container. A bucket or a box that carries things.
You could have a bucket of water or a bucket of strawberries (or a bucket of blood if your are a pirate). But it's just a container.
Video uses compressions schemes to fit the data into a file. Video uses compressor de-compressors (codecs) to achieve that goal.
Not all codecs (thousands of them) are available to the software you are using to open and display (decode = decompress) them and, since there are so many, there is no way you can open just any file with just one player.
On the Internet there are 4 major players (viewers):
QuickTime (Apple Computer)
WMP (Microsoft)
Real (Real Player)
Flash Video (Adobe, previously Macromedia)
You nearly always have to fall back on one of these players to view video media.
Real Player can view most QuickTime created content but QuickTime can't even open Real Media formats (.rm).
QuickTime Player can view some (but not the newer) Flash Media format (.swf) and Flash can import most QuickTime formats and convert them.
QuickTime, via Flip4Mac, can now view most WMP formats but WMP can't open most QuickTime file formats.
Confused? There are even more issues in play!
Codecs are "software" based. What is written for a PC won't work on a Mac and vice versa so their developers need to write new versions for each OS.
As newer codecs are developed older ones are obsoleted and drop out of use. It may take an older machine to play the file. Many codecs are "proprietary" and only allow viewing using their software or third party "converters" to make them work without them.
Last chance with QuickTime trying to play your AVI file (a container that Microsoft tried to kill of years ago). Open the file with QuickTime Player and then open the Movie Info (renamed Inspector in version 7.2). This info window should show what codec was used to make the file even though QuickTime may not be able to display it.
A Google search for codec name +Mac may help you find the version used in your AVI. Be sure to install a version compatible to your machine.

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This is why you need to pay attention to the actual codecs used in the AVI file and ensure that you have removed any third-party components which may conflict with the Perian component package as detailed on the support page of the Perian web site.
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Thanks Curt and 'Mylenium'
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QT won't open .avi files...

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