How to hardsub subtitle with FFmpeg

HardsubWithFFmpeg.txt

::
:: This demonstrate on how to hardsub embeded subtitle and downscale video to 360p with only FFmpeg. Ensure FFmpeg is compiled with --enable-libass

ffmpeg -hide_banner -i "D:\oh\test\input.mkv" -vf "subtitles='D\:\\oh\\test\\input.mkv'",scale=-1:360:flags=spline -c:v libx264 -preset ultrafast output.mp4

::Character ':', '\' need to be escaped if present in input's path

:: Escape both characters with sed.
echo "D\:\\oh\\test\\input.mkv" | sed "s,\\,\\\\,g;s,:,\\:,g" >>name
set /p modified=< name
del name
echo %modified%