Sebastian Haase a écrit : >>>> 5529600000 / 1024 / 1024 / 1024 > 5.14984130859 > > So you are saying you are mem-mapping a 5.2 GB file without problem !? > > That's pretty neat ;-) Dimensions were wrong in my code, yes. For 1200x1600x720, it works fine ;-) Cheers, -- Fred