A couple of days ago I made 2 videos of jupiter with different exposure settings. The lower exposed video was to get some detail on jupiter while de overexposed video was to get some view of the moons on the image. I stacked both videos and added the resulting images in photoshop to obtain the following image.
At first I could only distinguish 2 moons, but after cranking up the exposure in photoshop Ganymede showed up as well. The 4th of the bright moons, Callisto, falls out of the field of view.