fixing renderText script

datamosh.rb

@@ -0,0 +1,49 @@
+#!/usr/bin/env ruby
+# encoding: utf-8
+require File.expand_path '../helper.rb', $0
+
+doc = <<-DOC.gsub '__FILE__', File.basename($0)
+Do simple datamoshing.
+
+Usage:
+  __FILE__ <infile> [-s <start> --decap --raw] -o <outfile>  [--debug]
+  __FILE__ -h | --help
+
+Options:
+  -o <outfile>   Set output file name.
+  -s <start>     Set begining position of datamoshing as sec [default: 0].
+  --raw          Keep output as no-keyframe avi [default: false].
+  --decap        Remain datamoshed frames only [default: false].
+  --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'
+    infile = options['<infile>']
+    avifile = tmpdir.join('mpeg4.avi')
+    cmd.run infile: infile, outfile: avifile.to_s
+    cmd = Cocaine::CommandLine.new 'ffmpeg', '-i :infile 2>&1', :expected_outcodes => [0, 1]
+    info = cmd.run infile: avifile.to_s
+    fps = (info =~ /, ([\.\d]*) fp/) ? $1 : 24
+    start_at = (fps.to_f * options['-s'].to_f).to_i
+    a = AviGlitch.open avifile
+    datamoshed = a.frames[start_at..-1].to_avi.remove_all_keyframes!
+    if !options['--decap']
+      base = a.frames[0..start_at].mutate_keyframes_into_deltaframes!
+      datamoshed = (base.concat datamoshed.frames).to_avi
+    end
+    glitchfile = tmpdir.join 'glitch.avi'
+    datamoshed.output glitchfile
+    if options['--raw']
+      cmd = Cocaine::CommandLine.new 'cp', ':infile :outfile'
+    else
+      cmd = Cocaine::CommandLine.new 'ffmpeg', '-i :infile -an -q:v 0 :outfile'
+    end
+    cmd.run infile: glitchfile.to_s, outfile: options['-o']
+  end
+rescue Docopt::Exit => e
+  puts e.message
+end