I am not very knowledgeable with Mac , but I thought I could make a go of it. I had some 8mm files converted to digital from a local shop. They gave n=me 4 DVDs and I had them put the uncompress files on a passport hard-drive. It was returned to me with 4 avi files about 16GB in size They use a PC based program so my files are Canopus Type 2. How do I convert these to something I can use in iMovie? Any help please.