MP4 movie does play in QuickTime but not in iTunes I have one MP4 movie that plays just fine in QuickTime (I've run it from beginning to end without problem).

However, when I imported it into iTunes, it can load but cannot play. Clicking on the play/pause button does not work. Nevertheless, I can advance the progress bar to any point in the movie, but the screen just shows a still image of that point.

This is really strange since as far as I know, iTunes plays movies with QT.

So, what is the possible cause of this problem and how to fix it? Thanks in advance.



My environmental specs: OS X 10.8.4, iTunes 11.0.4 (4), QuickTime Player 10.2 (603.17).
I suspect that the codec is the issue. You should probably try to re-encode the movie. There are a multitude of encoding apps out there such as Handbrake.