I record presentations of professors in front of students
lecturing with power point at a University with Captivate 3.
Some of these presentations go on past the 2 hour mark and
the resulting Captivate project has about 570 slides, amongst this
project are large chunks of about 30 slides with audio but only
white and blank. I know that there's still an image there as the
professors was still lecturing but not sure why large parts of
project only have white slides.