Dump specific subtitle tracks from MKV files to appropriate .srt files

subdump.sh

#!/bin/bash
SUB_TRACKS="2:jpn 3:eng"
find . -type f -iname "*.mkv" -print0 | while IFS= read -r -d '' file; do
    TITLE=$(basename "${file}" .mkv)
    echo $TITLE
    for track in $SUB_TRACKS; do
        TRACK_ID=$(echo $track | cut -d':' -f1)
        TRACK_LANG=$(echo $track | cut -d':' -f2)
        mkvextract tracks "${file}" "${TRACK_ID}:${TITLE}.${TRACK_LANG}.srt"
    done
done