I've got two timelapses, one shot in landscape, and another in portrait mode. How do I rotate the portrait mode images 90 degrees so they will not be incorrectly viewed in the final timelapse?
---Steve

After making all adjustments (LRTimelapse will not rotate) as a last step in Lightroom got to grid mode (G) select all images and rotate them with Ctrl+"," or Ctrl+".". Then export your video as usually from the slideshow module.

Thanks, I really appreciate it!
---Steve

there is a tutorial on how to rotate images using an image app, you can take a look. hope you get what you what.

Will this method work if I am using aftereffects to compile the Images after LRT?

This is a very old thread. LRTimelapse 5 is able to deal with rotated images.
What exactly are you trying to do?