FILES=*.srt
for f in $FILES

# Script changes SRT numbers formula:
	# last three digits of six-digit decimal are removed
	# decimal is replaced by a comma
	
# Dependencies: Sed

# Tested to work with Mac only.

# usage:
#	1) cd to directories with files + script
#   2) enter path/to/script.sh
#    N.B. make sure file names have no space and that script is executable ( chmod +x path/to/script.sh )

# Joseph Polizzotto, Access Technology Specialist Instructor (HTCTU) 408-996-6044

do
  # extension="${f##*.}"
  filename="${f%.*}"

echo "Correcting timestamp formulas in $f"

# last three digits of six-digit decimal are removed
sed -ri 's/([0-9]+\.[0-9]{3})[0-9]+/\1/g' $f

# decimal is replaced by a comma
sed -ri '/[0-9]\./s/\./,/g' $f

done