What does HackerNews think of Anime4K?

Microsoft Edge is getting a video upscaler to make blurry old videos look better | Mar 2023

Personally, it's not really any better than mpv filters like NIS [0] (Nvidia Image Scaling, which does not use AI but is somehow more sharp than these filters, likely because Nvidia used what they learned from AI upscaling to create a better non-AI upscaler; AMD's FidelityFX Super Resolution is also available as an mpv filter on the same page at [0]) as well as Anime4k [1] (which does use AI but only in the training phase to create the initial glsl file which then does not use AI inferencing but plain old image filters).

Combine mpv with its yt-dlp [2] and SponsorBlock support [3] and you have a competent way to upscale your own YouTube (and other types of [4]) videos.

If you really want to upscale with AI (albeit not at runtime), I've found Topaz Video AI to be the best so far, much sharper than other solutions on the market.

[0] https://gist.github.com/agyild

[1] https://github.com/bloc97/Anime4K

[2] https://www.funkyspacemonkey.com/replace-youtube-dl-with-yt-...

[3] https://github.com/po5/mpv_sponsorblock

[4] https://github.com/yt-dlp/yt-dlp/blob/master/supportedsites....

Project 4K77 | Sep 2021

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Even digital video created with low-resolution cameras will eventually be viewable in 4K, 8K and beyond because AI upscaling technology is just so great. See Anime4K for examples.

https://github.com/bloc97/Anime4K

Yes it "guesses" what the missing information is and populates it. Similar approaches will work for live action media too.

And successive video frames encode so much extra resolution that a single frame doesn't capture, so there's a lot of information to pull from.

Bringing 4K and HDR to Anime at Netflix with Sol Levante | Apr 2020

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There is also Anime4K [1]. It doesn't use machine learning though.

[1]: https://github.com/bloc97/Anime4K

Someone used neural networks to upscale a famous 1896 video to 4k quality | Feb 2020

Tangentially related, a real-time video upscaler: https://github.com/bloc97/Anime4K