I've created a slideshow - 70+ slides lasting 45 minutes.
I want, ultimately to put it on VCD/DVD, but also have it
as a playable file.

I used Joern's "Slide Show Movie Maker" which does everything
I want, except -creating a version for writing to video tape
takes about 4 days!

My question:

Are there any CODECs or systems that help here: Clearly
encloding 2 minutes of a slide image that doesn't vary is a
"waste" of disc space and processing time.

I did look for an app that did the slide to movie maker live to
the display, but they seem to suffer unacceptable delays
in slide switching that makes the narrative disjointed or lose synch with the pictures - like slideshow ultra gold