One-liner to run ffsubsync against all media files in directory.

gistfile1.txt

# assumes .mkv media format and existing subtitles end in .en.srt
for f in ./*.mkv; do media=$(basename -s .mkv ${f}); $(ffs ${media}.mkv -i ${media}.en.srt --overwrite-input); done

# improved version that handles directory recursion
find . -type f -name '*.mkv' -print0 | while IFS= read -r -d '' file; do episode=$(echo -en ${file} | sed 's/\.[^.]*$//'); echo -en ${episode}; done