Listing duration of mp4s.

duration.rb

#! /bin/sh
exec ruby -S -x "$0" "$@"
#! ruby

def h_mm_ss(sec)
  min, ss = sec.to_i.divmod(60)
  hh , mm = min.divmod(60)
  "%dh%02dm%02ds" % [hh, mm, ss]
end

while $file = gets
	$file.chomp!
	$result = `ffprobe #{$file} -hide_banner -show_entries format=duration`
	$duration = $result.gsub(/(\s)/,"").match(%r{\[FORMAT\]duration=(.+?)\[/FORMAT\]})[1].to_i
	print $duration, "\t" , h_mm_ss($duration), "\t", $file, "\n"
end