Today I did some 4K up scaling tests.
The Material I used was an old Trailer (MP4 720p) from the film “In Memoriam” that I shot 15 years ago on a Sony FS100.
I up scaled the material to 4K – first in Topaz Video Enhance AI, and than in Resolve with Superscale and an additional node for a bit of sharpening.
I was pretty much surprised, that at the end, the visual difference is nothing to write home about, but the render times are way different – like in more than 800% different.
In a nut shell: IMHO – doing it in Topaz is not really worth the wait – your mileage may vary though, depending on your material and expectations.
To be honest, even the difference between Superscale and the normal (Lanczos) scaling in Resolve is way less than I expected. If you really have a need for speed, Lanczos is probably doing the trick in most cases.
I was a bit disappointed though, cause I really wanted the Topaz result somehow reflecting the sooomuchloooooonger render times, but actually it barely does.
There are some fringe cases – like trees and foliage for example – where it does a bit of a better job than Superscale, but than – with more tweaking in Resolve, I probably could come dammed close. Topaz does definitely a better job in de-banding/de-posterizing compression artefacts though.
And yeah, if you zoom in 800% on a still frame, you can probably find some more, but that’s not the point of up-scaling.