System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: Quadro M6000/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 436.02
Blender Version
Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-10-25 10:47, hash: rB7137d89daaae
Worked: (optional)
Short description of error
The Offset speed value in X and Y in the Background Images is non-uniform
Exact steps for others to reproduce the error
The Offset value in X and Y in the Image Background is non-uniform, it takes the dimension on the reference image and that make it difficult to use.
If the image is a square, the offset X = Offset Y in speed.
If the image isn't a square, the speed isn't uniform.
It makes it difficult to manipulate.
Example of an image.
And a video

