Coppelion 10bit mkv w/ subs to mp4

ffmpeg -dump_attachment:t "" -y -i %1 -c copy %~n1-script.ass
start /LOW /WAIT "%cd%" ffmpeg -i %1 -report -codec:v libx264 -preset slow -x264opts crf=18.0 -vf ass='%~n1-script.ass' -codec:a copy -sn -movflags +faststart "%~dpn1-hardsub.mp4"



"C:\ffmpeg\bin\ffmpeg.exe" ffmpeg -i "Coppelion - 01.mkv" -map 0:v -map 0:a -c:a aac -strict -2 -b:a 640k -c:v libx264 -crf 18 -preset ultrafast "Coppelion - 01.mp4"