Thanks for the help.
But there is something I'd like to know : isn't it possible to access directly
the GWorld PixMap and then extract some grabbed images after a SGIdle or SGUpdate
> The "SGDataProc" sample code (previously called "MiniMung") on Apple's
> web site shows how to perform processing captured data. At a WWDC past,
> we used this code as the basis for an application that displayed
> histograms of the video (rather than the video itself).