I've shot some clips with a Canon 5D Mkiii (29.97 fps H.264 1920x1080 all i-frame / highest quality). They look great in Quicktime player but appear black in Avid Media Composer (6.0.3) Regardless of whether I link via AMA or import/convert to Avid codec, the result is the same: a black movie with audio. I can convert with Adobe Media Encoder or