Set Video Mode to 1080p
Open video/images (sized at 3840x1080)
Drag from source to timeline (Creates V1)
Crop: Source – Right 960px (Shows Side 1)
Add Video track: V2
Drag from source to V2
Crop: Source – Left 960px (Shows Side 2)
Use Size, Position & Rotate after Crop: Source to positioning.
Source image I created: You can download this image from here.
Edited with Shotcut
You can download this MLT file and see what I’ve done.
Download the source image I created and have tell Shotcut where to find the downloaded source file. Shotcut will actually ask you where to find that file when you attempt to open the MLT.
Sides 1 and 2.mlt (6.0 KB)
Source images: (That I used to create the 3840x1080 image)
Side 1 : https://pixabay.com/photos/tunnel-road-fog-drive-transport-6723643/
Side 2: https://www.pexels.com/photo/luxury-sport-car-in-bright-blue-smoke-5628246/