ofVideoPlayer, problem loading long videos on Mac

Hi!
I’m having problems displaying a mp4 film (about 1 hour and 30 min, 1,2 Gb) on a Mac. The application loads the film but it hangs at about minute 3…
I’ve checked the same application with the same film on Windows and there is no problem in this case.

I’d like to know if another Mac user has had the same problem…

thanks!!