Extract all subtitles from MKV video file, and make a copy of the video file without subtitles. Requires mkvmerge and subtitleedit CLI in PATH

subtitle_extractor.bat

@echo off

FOR %%A IN (*.mkv) DO (
	echo %%~nxA
	FOR /F %%I IN ('mkvmerge  -i "%%A" ^| FIND /C "SubRip"') DO (IF %%I GTR 0 (echo     SRT found in file) & (subtitleedit /convert "%%A" SubRip) else (echo     SRT not found in file))
	echo.&echo.
	FOR /F %%I IN ('mkvmerge  -i "%%A" ^| FIND /C "SubStationAlpha"') DO (IF %%I GTR 0 (echo     ASS found in file) & (subtitleedit /convert "%%A" SubStationAlpha) else (echo     ASS not found in file))
	echo.&echo.
	FOR /F %%I IN ('mkvmerge  -i "%%A" ^| FIND /C "VobSub"') DO (IF %%I GTR 0 (echo. &echo. &echo. &echo. & echo      VobSub - SUB/IDX found in file. You should use SubtitleEdit to convert the subtitles to a text-based format such as SRT) else (echo     VobSub not found in file))
	echo.&echo.
	FOR /F %%I IN ('mkvmerge  -i "%%A" ^| FIND /C "subtitles"') DO (IF %%I GTR 0 (rename "%%~nxA" old-"%%~nxA") & (mkvmerge -o "%%A" --no-subtitles "old-%%A"))
)
pause

Alternatively, instead of using mkvmerge.exe in the last line you could also use:

FOR /F %%I IN ('mkvmerge  -i "%%A" | FIND /C "subtitles"') DO (IF %%I GTR 0 (echo     SRT found in file) & (rename "%%A" "%%~dpnA"-ORIGINALBACKUP.%%~xA) & (ffmpeg -hide_banner -loglevel quiet -i "%%A" -sn -vcodec copy -acodec copy "%%A") else (echo     No subtitles found in the file...))