There is easy fistrule: use webp+webm files = nconvert (webp) OR cweb
not Avi/avif convert, becouse that tool is was designed by avi / avif files.
In otherwords its destroyes /doesnt support those files (webm files goes 0mb) etc.
Just needs selfawereness about that tool use.
Even though it looks or sounds cool, but in compress worlds needs to understand what tool does do.
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(Jiangmin i can ignore, dont remember wtf was VBA32)
i checked SDK file its 8.0.1. ArtificialAwakening 0.10.1
(but i dont have new version of ArtificialAwakening)
vc version only gave numbers: vc_version = 1648
you can use setups about image quality 70-80,
Audio bitrate 40 (keep audio same by default),
Cfr 35-41 (mostly compressors use 35-39)
Video bitrate 0 (default). (if 0 its typed in UAGC its compress as default video bitrate and comrepss it)
(if you have better understanding videobitrate what you want to use. Its about 3000-4500 ish) (3000 its minimum, after that its goes that potato [under 3000 videobitrate])