fixing renderText script

concat.rb

@@ -0,0 +1,47 @@
+#!/usr/bin/env ruby
+# encoding: utf-8
+require File.expand_path '../helper.rb', $0
+
+doc = <<-DOC.gsub '__FILE__', File.basename($0)
+Make multiple files into datamoshing and concatenate them into one movie.
+
+Usage:
+  __FILE__ <infile>... -o <outfile>  [--debug]
+  __FILE__ -h | --help
+
+Options:
+  -o <outfile>  Set output file name.
+  --debug       Flag for debugging [default: false].
+  -h --help     Show this screen.
+DOC
+
+begin
+  options = Docopt::docopt doc
+  mktmpdir(options['--debug']) do |tmpdir|
+    cmd = Cocaine::CommandLine.new 'ffmpeg', '-i :infile -c:v mpeg4 -y -q:v 0 -an :outfile'
+    avi = nil
+    options['<infile>'].each.with_index do |infile, i|
+      avifile = tmpdir.join('mpeg4.avi')
+      cmd.run infile: infile, outfile: avifile.to_s
+      a = AviGlitch.open avifile
+      unless i == 0
+        a.glitch :keyframe do |f|
+          ''
+        end
+      end
+      a.mutate_keyframes_into_deltaframes!
+      if avi.nil?
+        avi = a
+      else
+        avi.frames.concat a.frames
+        a.close
+      end
+    end
+    glitchfile = tmpdir.join 'glitch.avi'
+    avi.output glitchfile
+    cmd = Cocaine::CommandLine.new 'ffmpeg', '-i :infile -an -q:v 0 :outfile'
+    cmd.run infile: glitchfile.to_s, outfile: options['-o']
+  end
+rescue Docopt::Exit => e
+  puts e.message
+end