Windows batch file to convert any image to AVIF image using nconvert and cavif

covid.bat

@echo off

set FILENAME=%~p1%~n1
set EXT=%~x1

set FILENAME-WITH-EXT=%FILENAME%.png

set QUALITY=16

IF NOT "%EXT%"==".png" (
    nconvert -quiet -out png %FILENAME%%EXT%
)

IF /I "%2"=="-l" (
    set ARGS=--lossless
) ELSE (
    set ARGS=--cpu-used 0 --bit-depth 8 --rate-control q --crf %QUALITY% --enable-full-color-range^
    --bit-rate 0 --tune psnr --encoder-usage good --adaptive-quantization variance --enable-cdef --full-still-picture-header^
    --row-mt --enable-rect-partitions --enable-ab-partitions --enable-1to4-partitions --enable-adaptive-quantization-b
    set ADD-ARGS= --profile 1 --pix-fmt yuv444  
) 

set ALPHA-FILENAME=%FILENAME%-alpha.avif

cavif -i %FILENAME-WITH-EXT% -o %ALPHA-FILENAME% --encode-target alpha --monochrome %ARGS%

IF EXIST %ALPHA-FILENAME% (
    cavif -i %FILENAME-WITH-EXT% -o %FILENAME%.avif --encode-target image --attach-alpha %ALPHA-FILENAME% %ARGS% %ADD-ARGS%
    del %ALPHA-FILENAME%
) ELSE (
    cavif -i %FILENAME-WITH-EXT% -o %FILENAME%.avif --encode-target image %ARGS% %ADD-ARGS%
)

IF NOT "%EXT%"==".png" (
    del %FILENAME-WITH-EXT%
)

nconvert: https://www.xnview.com/en/nconvert/
cavif: https://github.com/avif-community/cavif