Print duration of all movies with 'Christmas' in the title

duration.sh

#!/usr/bin/env bash

# use mediainfo to get total playtime of one or more video files
# and then calculate total playtime.
# e.g. mediainfo --Inform="Video;%Duration%" [inputfile]

err() {
    echo "Error: $1"
    exit 1
}

duration() {
  # returns video file playtime in seconds (convert from ms).
  # also accounting for some files that return decimal values.
  ms=$(mediainfo --Inform="Video;%Duration%" "$1") || err "failed to read video"
  awk -v v="$ms" 'BEGIN{printf "%d", v/1000}'
}

# check for mediainfo
if ! command -v "mediainfo" 1> /dev/null 2>&1; then
   echo "mediainfo not found!" && exit
fi

movies=()
mapfile -t movies < <(find /srv/pve/zpool/movies -type f \( -name '*Christmas*.mp4' -o -name '*Christmas*.mkv' \))
IFS=""

total=0
for m in ${movies[@]}; do
  sec=$(duration $m)
  total=$(($total+$sec))
done

num_movies=${#movies[@]}
echo "Movies with 'Christmas' in the title"
echo "===================================="
echo "Total Movies: $num_movies"
echo "Total Seconds: $total"
printf 'Avg. Runtime: %.2f hrs\n' $(echo "scale=2; 510275 / 3600 / 97" | bc)
echo "----------------------"
printf '%d days, %d hours, %d minutes, %d seconds\n' \
    $((total/86400)) \
    $((total%86400/3600)) \
    $((total%3600/60)) \
    $((total%60))