I’m pleased to see that Ashampoo are now giving away their fine Slideshow Studio, in a perpetually free ‘2017’ version. You do have to request a licence key by email, then turn off auto-updates, but other than that the install is fairly painless.
I did some research back in 2016 and came to the conclusion that Slideshow Studio is the best option for doing easy ‘Ken Burns’ style transitions between still photographs, slowly panning and zooming in on them. It was used to make my promo video for my H.G. Wells in the Potteries book…
I find that the free 2017 version is fully featured in terms of editing and available transitions, and is only limited in terms of its video output. It can only output to standard .WMV (Windows Media Video) and the new open source .WEBM format.
(Note that the full $15 Slideshow Studio HD 4 does have the full range out video output).
However, the free XMedia Recode for Windows can convert those two formats to .AVI etc, if required, so the paid version of Slideshow doesn’t seem to be that vital. Unless perhaps you intend to post many such videos to YouTube, Facebook etc,, or need to output for showing on a massive screen.