If there's anything that needs audio/video automation, I've always turned to FFmpeg, it's such a crucial and indispensible tool and so many online video tools use it and are generally a UI wrapper around this wonderful tool. TIL - there's FFmpeg.Wasm also [0].
In Jan 2024, I had used it to extract frames of 1993 anime movie in 15 minutes video segments, upscaled it using Real-ESRGAN-ncnn-vulkan [1] then recombining the output frames for final 4K upscaled anime [2]. FWIW, if I had built a UI on this workflow it could've become a tool similar to Topaz AI which is quite popular these days.
[0]: https://github.com/ffmpegwasm/ffmpeg.wasm
[1]: https://github.com/xinntao/Real-ESRGAN-ncnn-vulkan
[2]: https://files.horizon.pics/3f6a47d0-429f-4024-a5e0-e85ceb0f6...