Below is a script that can be used to convert all files in the directory to AV1 #!/bin/bash set -e find * -type f -iname '*.mkv' | grep -v av1 | while read -r mkv; do file=${mkv%.*} av1="${file}-av1.mkv" if [ -f "${av1}" ]; then echo "${av1} already there" # echo "${file} -> ${av1}" else echo "converting ${file} --> ${av1}" ffmpeg -i "${mkv}" -c:v libsvtav1 -crf 35 "${av1}" < /dev/null && echo "${av1}" >> completed.