Mark told you my favorite trick – save slides which are blank.
We do a lot of on-camera powerpoint lectures, taking the output of a laptop, into a scan converter and into a TV, plasma or projector.
Then in post we edit the slides into builds.
Let’s say a slide has 5 bullet points.
I would make 4 copies of the slide, and then carefully delete all but the first bullet point on slide 1, add point 2 on slide 2 etc. I say be careful because Powerpoint likes to automatically resize text to best fit the screen, which of course kills your build.
Inevitably Powerpoint is not safe title compliant. In those cases, when importing the slides into your NLE, scale them down so the text is safe, then create a mask to cover the black space around the edges.
If your talent has created slides with typical PPT backgrounds, I like to replace those with a plain blue color, as the bitmapped PPT patterns can vibrate or fall apart on TV.
If you can, record an ISO of the scan converter output with audio, or cut it live to tape, as a rough cut.
Mike Cohen