I can set up a new project so that the width and height are 3840x1940 with a aspect ratio of 2:1 in the "movie settings" of MEP. When I go to "export movie - video as mpg4" I can set the resolution to 3840x1920 but I can not set the ratio to 2:1. I believe the wrong aspect ratio (I use 16:9) is causing "black disks" at the apex and nadir of the resulting movie.
Any suggestions appreciated.
Using MEP version 15.0.0.90 (UDP3) on Windows 10, version 1803 with 16 gig RAM and Intel Core i7 2600K.