Well, forget about QuickTime movie formats as well as MPEG-2. Those won't work in the 64 bit version of Sonar because there are no 64 bit codecs for these available yet. But .avi should work, not sure why this is not importing for you. Maybe try analyzing the file using G-Spot. This free application will tell you if you have the required codecs installed on your system as well as information about the video file you're using. Don't worry, it doesn't even need installing and it can be
completely removed by just deleting it. You get get G-Spot here:
http://www.headbands.com/gspot/ HTH