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Description
I tried upscaling a 720p (4:3, 960x720) anime to 4K by calling
reve "input.mkv" -s 3 "output.mkv"
and it produced a very broken output:

Here's some more info:
- Windows 10, 22H2
- codec of original file: H264
- RTX 2060 SUPER
Testing another snippet with 3x produced the same broken result:

Scaling by 4x is also producing broken results:

Only scaling by 2x seems to be fine:
