I have premiere elements 9 and am trying to import avi files. Everytime I try, a pop up appears and says the type of file is not supported or the required codec is not installed. There is also another box that appears at startup and says a reduced set of content has been installed and I'v installed all content for premiere elements 9 online but the box still appears.
Please help, this is annoying
Welcome to the forum.
AVI (MOV, MPEG, WMV, etc.), are but wrappers, and can contain almost anything. It is what's inside those wrappers, that counts. This ARTICLE goes into detail, and also tells you how to peek inside the wrapper.
Let us know what the CODEC is, insdie the AVI wrapper, and that will tell the story.
My guess is that the CODEC is either DivX/Xvid, or MJPEG.