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I found a good SVT-AV1 fork for high quality Anime encodes and made a DRAG&DROP windows batch script for it that includes SSIMULACRA2 scoring.
I also compiled the fssimu2 project for windows otherwise you have to manually convert video frames to PNG and math out the average by hand.https://github.com/nekotrix/SVT-AV1-Essential/releases/tag/v4.0.1-Essential@echo off & setlocal set "input=%~1" & set "outbase=%~dpn1" & set "stfu=-hide_banner -loglevel fatal" set "av1base=--lookahead 32 --preset 4 --rc 1 --max-qp 60" set "psy=--ac-bias 0.5 --enable-dlf 3 --noise-adaptive-filtering 4" set "bt701=--color-primaries 1 --transfer-characteristics 1 --matrix-coefficients 1" echo Welcome to the mini Essential SVT-AV1 2 pass drag and drop encoder, SSIMULACRA2 included at the end :ASK set /p bitrate="Enter 2 pass kbps bitrate: " && set /a bitrate=bitrate 2>nul || goto ASK if %bitrate% LSS 1 (goto ASK) else if %bitrate% GTR 10000 goto ASK echo: ffmpeg %stfu% -i %input% -map 0:v:0 -pix_fmt yuv420p10le -f yuv4mpegpipe -strict -1 - | ^ SvtAv1EncApp-4.0.1-Essential-Windows_Optimized -i - %av1base% --tbr %bitrate% %psy% %bt701% --pass 1 -b temp1pass.ivf ffmpeg %stfu% -i %input% -map 0:v:0 -pix_fmt yuv420p10le -f yuv4mpegpipe -strict -1 - | ^ SvtAv1EncApp-4.0.1-Essential-Windows_Optimized -i - %av1base% --tbr %bitrate% %psy% %bt701% --pass 2 -b temp2pass.ivf ffmpeg %stfu% -i temp2pass.ivf -c:v copy -an -y "%outbase%_%bitrate%_kbps_2pass_essential-av1.webm" echo: && echo --- calculating SSIMULACRA2 score of "%outbase%_%bitrate%_kbps_2pass_essential-av1.webm" --- && echo: ffmpeg %stfu% -i %input% -pix_fmt yuv420p input.y4m && timeout /t 5 /nobreak ffmpeg %stfu% -i "%outbase%_%bitrate%_kbps_2pass_essential-av1.webm" -pix_fmt yuv420p output.y4m timeout /t 5 /nobreak && fssimu2 input.y4m output.y4m del temp1pass.ivf temp2pass.ivf svtav1_2pass.log input.y4m output.y4m && pause
https://github.com/gianni-rosato/fssimu2
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!USE AT YOUR OWN RISK! !USE AT YOUR OWN RISK!
Here's the windows .exe fssimu2, you're going to need all of those .dll inside when placing them in PATH btw, I don't know how to compile them together unfortunately.
All I did was modify build.zig/dependencies from the fssimu2 project files and generate a windows executable through MSYS2 and bundle all the .dll files it needs in a .zip.
However I can't guarantee how reliable/stable this thing will be since it's fssimu2 hasn't even hit version 1.0 yet. I also got a false positive on an A/V scan.
https://files.catbox.moe/iot2sr.zip
!USE AT YOUR OWN RISK! !USE AT YOUR OWN RISK!
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For those who don't know when AV1 was released it was only beating H.264 at low quality. As the SVT-AV1 project improved it also started beating H.264 at medium quality but until recently there wasn't much benefit going from H.264 to AV1 if your goal was high quality. So that's what the Essential fork is trying to fix. In the future we may even see a fork for transparent quality (ie literally can't tell source and AV1/H264 encode apart).
Measuring what we'd subjectively describe as high video quality has also been a guessing game until recently with the introduction of SSIMULACRA2. Before that we had PSNR/SSIM with very poor subjective opinion correlation, VMAF with okay-ish subjective opinion correlation. SSIMULACRA2 AFAIK currently offers a much stronger subjective opinion correlation though I'm not sure if it's the strongest (see IW-SSIM)