I assume there is nothing wrong with your footage and it’s 1920 by 1080 as you stated. Then go to your Home directory then inside it to: Library > Preferences
Drag com.apple.FinalCutPro.plist to the trash
Scroll down to the Final Cut Pro User Data folder
Drag Final Cut Pro 7.0 Prefs to the trash
Drag Final Cut Pro Obj Cache to the trash
Drag Final Cut Pro Prof Cache to the trash
Empty the trash
Open new project, import your footage and add clip to a sequence. Check sequence settings.
Everest Mokaeff
http://www.mokaeff.com