As a workaround, you might want to look into my workflow of using Still Images.
Now, I must start by saying that I nearly always create my slideshow in PrPro, and do not normally use the SlideShow feature in En.
I gather my Images into folders, that differentiate their size, and their orientation, and will often place those, that will require Panning on a Zoomed OUT Image, into yet another.
In Photoshop, I have Actions to Scale to the necessary dimensions, and also apply Rotation, if required. For those Images that WILL have the Pans, I calculate how large they need to be, and adust one of the Actions for that purpose.
Then, I use Automate>Batch, choosing the appropriate Action, and set my Source Folder and Destination Folder, as needed. Those Ps Actions work on the every Image in the Source Folder, and output (Save_As) to my Destination Folder, as PSD.
Those Scaled files are then Imported, and any Pans, Zooms, etc., are applied to them.
I have not used En's Scale function, but have read of a few problems with it. Also, remember that any sort of Scale to Frame, will only Scale up to the point, where the greatest dimension fills that dimension on the Frame, so if you have, say a portrait oriented Image (vertical), the Scale function will only Scale that up, until the vertical dimension fills the vertical dimension of your Frame, leaving black bars on either side (Pillarboxed). Same for a landscape oriented image (horizontal), whose Aspect Ratio is less than the Video Frame. That Image will be Scaled until the horizontal dimension fills the horizontal dimension of the Video Frame, and as the Aspect Ratio does not match up to the Aspect Ratio of the Video Frame, you will be left with black bars above and below (Letterboxed).
As required, I also do any Cropping that would be required by differences in Aspect Ratio, so that my processed Images WILL match my Video Frame Size.
Maybe others will have some tips on using the features in En, to perhaps save you from using the workaround.
Good luck,
Hunt
