kdenlive dissolve transition fixer. Prints fixed project xml contents. (See kdenlive bug: http://www.kdenlive.org/mantis/view.php?id=2668)

kdenlive-transition-fixer.rb

#!/usr/bin/env ruby

require 'rubygems'
require 'nokogiri'



if ARGV.size != 1
  $stderr.puts "kdenlive dissolve transition fixer. Prints fixed project xml contents. (See kdenlive bug: http://www.kdenlive.org/mantis/view.php?id=2668)"
  $stderr.puts "Usage: #{File.basename $PROGRAM_NAME} <project.kdenlive>"
  $stderr.puts
  #$stderr.puts "How to write output to file:"
  #$stderr.puts "  #{File.basename $PROGRAM_NAME} project.kdenlive > fixed_project.kdenlive"
  #$stderr.puts  
  exit -1
else
  begin
  @file_path = ARGV[0]
  @modified = false
  doc=Nokogiri::XML.parse(open(@file_path))

  producers_hash = doc.xpath("//playlist/entry").map{|e| e['producer']}.inject(Hash.new(0)) {|h,p| h[p] += 1; h }

  producers_hash.each do |producer, count|
    if count > 1
      producer_element = doc.xpath("//producer[@id='#{producer}']").first
      doc.xpath("//playlist/entry[@producer='#{producer}']").each_with_index do |entry, index|
        if index>0
          new_producer_name = "#{producer}_#{index+1}"  
          entry['producer'] = new_producer_name
          new_producer = producer_element.dup(1)
          new_producer['id'] = new_producer_name        
          producer_element.add_next_sibling(new_producer)
          @modified = true
        end      
      end       
    end
  end
  
  if @modified
    puts doc.to_s
  else
    $stderr.puts "This file is already ok and not need to be fixed."
  end
  rescue Errno::ENOENT
    $stderr.puts "Wrong file name or file not exits!"
  end
end