sets video file mtime to its encode date

mtime-from-encode-date.sh

#!/bin/bash
# sets video file mtime to its encode date
# requires mediainfo
# see also the inverse of this script: "encode-date-from-mtime.sh"
# https://gist.github.com/yoosefi/66d9a58466fb9e8bf5a8467fc11f470e
set -eu
for each in "$@"; do
    x=($(mediainfo "${each}" | grep -m1 'Encoded date'))
    # skip null dates
    if [ -z "${x}" ]; then
        echo no date for \""${each}"\" >&2
        continue
    fi
    # skip bogus dates
    if ! [[ "${x[4]}" =~ ^(199)|(20).* ]]; then
        echo bad date for \""${each}"\" >&2
        continue
    fi
    touch --date="${x[*]:3}" "${each}"
done