extract_mkv_fonts.fish

function extract_mkv_fonts
	set -l BEFORE (ls | wc -l)
	set -l COUNT 0
	for FILE in $argv
		set COUNT (math $COUNT + 1)
		mkvextract attachments $FILE (mkvmerge -i $FILE | grep -o Attachment\ ID\ [0-9]\*: | grep -o [0-9]\*) 1> /dev/null
	end
	echo Extracted (math (ls | wc -l) - $BEFORE) fonts from $COUNT files
end