# Depends: GNU parallel 20161222, ffmpeg 4.3.6-0
# Ref/Attrb: [1]: FFmpeg wiki: https://trac.ffmpeg.org/wiki/Scaling
declare -g dir_in dir_out;
# Depends: GNU parallel 20161222, ffmpeg 4.3.6-0
# Ref/Attrb: [1]: FFmpeg wiki: https://trac.ffmpeg.org/wiki/Scaling
declare -g dir_in dir_out;