A ruby script to calculate the total amount of time of all videos on a YouTube channel.

yt-channel-time.rb

#!/usr/bin/ruby
##
# This script will calculate the total time for all videos on a user's channel
# It pulls from the channel's RSS feeds automatically, but is not particularly
# robust as it semi-scrapes out the time from the content area.
#
# (c) CBojar 2012, This is licensed under the MIT license.
##

require 'optparse'
require 'uri'
require 'net/http'
require 'rexml/document'

options = {}
optparser = OptionParser.new do |opts|
  opts.banner = "Usage: yt-channel-time.rb [options] <channel_name>"

  options[:verbose] = false
  opts.on( '-v', '--verbose', 'Turn on verbose output' ) do
    options[:verbose] = true
  end

  opts.on( '-h', '--help', 'Display this screen' ) do
    puts opts
    exit
  end
end

optparser.parse!

channel = ARGV[0]
if channel.nil?
  puts "Channel name required."
  exit 1
end

time = 0
videos = 0
url = "http://gdata.youtube.com/feeds/base/users/#{channel}/uploads?alt=atom&v=2&orderby=published"
puts "Fetching YouTube channel feed for #{channel}..."

while true
  puts "Fetching #{url}" if options[:verbose]
  response = Net::HTTP.get_response(URI.parse(url))
  break if response.code != '200'
  atom = REXML::Document.new(response.body)

  atom.elements.each('/feed/entry/content') do |content|
    videos += 1
    content.to_s.scan(/((?:[0-9]{2}:){1,2}[0-9]{2})&lt;/) do |match|
      match = match[0]
      time += (match.slice -2..-1).to_i
      time += (match.slice -5..-4).to_i * 60
      time += (match.slice -8..-7).to_i * 3600
    end
  end

  link = atom.elements.to_a('/feed/link[@rel=\'next\']')[0]
  break if link.nil?
  url = link.attribute('href').to_s.gsub /&amp;/, '&'

  sleep 1
end

hours = (time / 3600).floor
time -= hours * 3600
minutes = (time / 60).floor
time -= minutes * 60
seconds = time
puts "#{videos} videos: #{hours} hours, #{minutes} minutes, #{seconds} seconds."