That is interesting that Tony also already came up with displaying more than one portrait orientation photos in a video. 15 years ago consumer NLE did not have multitrack so I came up with this in the beginning. Use photoshop with win 98. Create a new frame with desired background color. Add two 2:3 aspect ratio photos, save, replace the left photo, save, replace the right photo, save, etc. until maybe 50 save were done. Batch reduce all saves to 720x480. Place all in a timeline in time order for say 6 sec. and add an overlap fade transition between each for a slideshow in a DVD. The apparent result is that the left photo fades out and a new one fades in while the right photo appear steady, then the right one fades out, etc. This repeats to the last one.
Creative minds at work and play. When there is a will there is a way even with old software. PD14 makes it a lot easier with it’s multitrack.
This would be a good way for portrait cell phone users to ultilize their photos should they ask again.
PS. The attached 9.16 Image Cycles.zip file is excellent presentation on what can be done in powerdirector for others who want to try this.