#!/bin/sh

if [ $# != 1 ]; then
  echo "Usage: duration video-file" >&2
  exit 1
fi

fp="$1"
out="$(ffprobe -loglevel error -show_format "$fp")"

# shellcheck disable=SC2181
if [ $? != 0 ]; then
  echo "$out" >&2
  exit 1
fi

python2.7 <<EOF
from __future__ import division, print_function
import re

m = re.search('duration=(\d+)', '''$out''')
seconds = int(m.group(1))

hours = seconds // 3600
seconds -= hours * 3600

minutes = seconds // 60
seconds -= minutes * 60

print('%dh%dm%ds' % (hours, minutes, seconds))
EOF