eric2006 said:Have you tried installing the codec for quicktime? I installed that, and .avi's played in quicktime. No conversions, or anything.
Mikuro said:When you open the AVI in QuickTime and open the info window (Window menu -> Show Movie Info), what does it say under "format"?
MisterMe said:IV50 is Indeo® Video5, an ancient Intel video format. It is supported under Classic. To the best of my knowledge, no MacOS X QuickTime codec for this format was every developed or released. It you have Classic installed, however, the Classic QuickTime Player should play it.