@Echo off
SETLOCAL
SET constantquality=26
SET audiobitrate=65
SET d=[ENG-SUB_CRF%constantquality%_yuv420p]
SET t=[ENG-SUB_CRF%constantquality%_yuv420p]
for %%f in (*.mkv) do (
ffmpeg -y -i "%%~f" -map 0:s:0 subtitles.ass
ffmpeg -y -i "%%~f" -vf subtitles="subtitles.ass" -map 0:0 -map 0:1 -threads 4 -c:v libx265 -preset veryslow -crf %constantquality% -c:a aac -b:a %audiobitrate%k -metadata:s:v:0 title="%%~nf %t%" -metadata title="%%~nf %t%" -pix_fmt yuv420p "%%~nf %d%.mp4"
)
Pause