Some time ago, I came across a Japanese project called Waifu2x. And this project is able to upscale images using a neural network from JPEG to PNG, but only through an Internet site:
Later, I found three forks using the GPU of the computer on which they are installed:
waifu2x caffe (Nvidia GPU only)
https://github.com/lltcggie/waifu2x-caffe
waifu2x converter cpp (for Nvidia/AMD GPUs using OpenCL instructions)
https://github.com/DeadSix27/waifu2x-converter-cpp
waifu2x ncnn vulkan (uses the Vulkan API driver)
https://github.com/nihui/waifu2x-ncnn-vulkan
But, again, a little later I came across two more forks, only now for the video:
Dandere2x (uses, optionally, three installed Waifu2x forks)
https://github.com/aka-katto/dandere2x
Video2x (requires the same three forks + Anime4K)
https://github.com/k4yt3x/video2x
Closer to the topic. It would be nice to see this option in this plugin, as Z-Scale is not bad, but in places it loses much in performance at the processing stage.