It does not seem to work for scale value below 4

[darkzbaron]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:
e.g.
python eval.py "rI7XCt0.mp4" --scale 2 --fps 60 --checkpoint "SuperSloMo.ckpt" --output "out.mkv"

Expected behavior
A clear and concise description of what you expected to happen.
Slow down to 2x

Desktop (please complete the following information):
Windows, conda, python2.8

[darkzbaron]

It works using eval.py.