I was on OS X Lion and all worked perfectly, but when I've installed Mountaion lion and Aperture 3.3.2... It can't import any types of video files to Aperture library now.
When I go to File -> Import -> Files ... it shows me an empty folder (if there is video only) or photos:
When I drag and drop any video file to Aperture icon, it says:
So, if I import video file to iPhoto library and then open it in Aperture, it can't play video:
I've searched about this problem, but I couldn't find anything. I don't know where's my mistake. Maybe Aperture on Mountain Lion has bug?
yesterday my problem was solved.
First I reinstalled (and updated) Aperture again, but this did not help.
Then I started from the recovery partition (cmd-r during start) and reinstalled Mountain Lion. No, you won't loose anything (but have a backup anyway!!). I did not have the Golden Master (as TheWrongStuff had), but the "normal" release fom the AppStore. But reinstallation helped anyway!
Now I am able to import again, and play my "old" movies, as it used to be!
Anyway, Apple is interested in my Aperture Library, I will send it to them on Monday. If they find out anything else, I will report here.
Just try to reinstall Mountain Lion, you can't do anything wrong doing this, I hope it works for you, too.
Have a nice weekend!