I am currently working on a project with XDCAM EX footage in Final Cut Pro. I am also making some motion graphics in AE. However when I render my comps with the XDCAM EX codec (QT file), FCP keeps dropping frames, and ONLY with those files rendered in AE. Besides the files just play OK in QT player. Any idea ?
I just read your post and i know its nearly a year since..
i had the same problem, and could not find a real solution,
except that when i export in after effects using file->export -> quicktime movie and use the XDCAM codec, they will play fine in final cut... if i use the render queue the exported files will drop frames in FCP !
its pitty not being able to use render queue though, but at least i could finish my project...
i suspect an after effects bug.