I found a batch file script to do the job I need to do. I posed the question of how to add directories and subdirectories recursively in the batch process in a comment on the post I got this code from, but no one replied after 4 months. I couldn't find an answer to this question searching this site so I figured id start a new thread on the topic.

What I wanted to do was be able to bulk change meta data information in MKV files which was accomplished thusly.


# This script takes all mkv files in the current directory and sets the filename
# (without .mkv) as its title in metadata

for mkvfile in *.mkv; do
mkvpropedit "$mkvfile" -e info -s title="${mkvfile::-4}"

How can I modify this to be run on a root directory to include all folders and sub-folders in the process? Thank you!

1 Answer 1


With bash, you'd set the globstar and nullglob shell options and use ** to recurse into subdirectories:

shopt -s globstar nullglob
for mkvfile in **/*.mkv; do
    mkvpropedit "$mkvfile" -e info -s title="${mkvfile::-4}"

See 4.3.2 The Shopt Builtin in the manual.

Note you can also use ${mkvfile%.mkv} to chop off the extension.

You can also use find, but I think it gets pretty ugly

find . -name '*.mkv' -exec sh -c 'mkvpropedit "$1" -e info -s title="$(basename "${1%.mkv}")"' sh {} \;
  • Getting error shopt: not found, Bad substitution May 10, 2018 at 19:33
  • Are you using /bin/bash or /bin/sh ? shopt is bash-specific. May 10, 2018 at 19:34
  • /bin/bash - same as the code sample I provided. May 10, 2018 at 19:35
  • find . -name '*.mkv' -exec sh -c 'mkvpropedit "$1" -e info -s title="${1%.mkv}"' sh {} \; Works like a charm but it puts the directory path in the metadata name also. May 10, 2018 at 19:37
  • Silly me I had a typo in the new script. Apologies, your script works perfectly. No error after the correction. ;) May 10, 2018 at 19:42

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