research.m1stereo.tv/gitweb/ - melted/blob - mlt++/swig/ruby/thumbs.rb

   1 #!/usr/bin/env ruby
   2
   3 # Required modules
   4 require 'mltpp'
   5
   6 # Create the mlt system
   7 Mltpp::Factory::init
   8
   9 # Get and check the argument
  10 file = ARGV.shift
  11 name = ARGV.shift
  12 size = ARGV.shift
  13 size = "192x144" if size.nil?
  14 raise "Usage: thumbs.rb file name [ size ]" if file.nil? || name.nil?
  15
  16 # Create the producer
  17 producer = Mltpp::Producer.new( file )
  18 raise "Unable to load #{file}" if !producer.is_valid
  19
  20 # Construct the playlist
  21 playlist = Mltpp::Playlist.new( )
  22
  23 # Get the out point
  24 out = producer.get_int( "out" );
  25
  26 # Calculate position of frames
  27 [ 0, 0.25, 0.5, 0.75, 1 ].each { |x| playlist.append( producer, x*out, x*out ) }
  28
  29 # Create the thumb nail generator
  30 generator = Mltpp::Consumer.new( "avformat", "#{name}%d.jpg" )
  31 generator.set( "real_time", "0" )
  32 generator.set( "progressive", "1" )
  33 generator.set( "size", size )
  34
  35 # Connect the consumer
  36 generator.connect( playlist );
  37 generator.run
  38