fixing renderText script

huffyuv.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)
+Glitch with Huffyuv codec.
+
+Usage:
+  __FILE__ <infile> [-s <n> -d <n> -h <n> -r <n-m>] -o <outfile> [--debug]
+  __FILE__ -h | --help
+
+Options:
+  -o <outfile>  Set output file name.
+  -d <n>        Set video duration by seconds. It is preferred to be less than 60s. [default: 30].
+  -r <n-m>      Set range in height of the glitch effect. It should be between 0 and 1. Or you can set increase-decrease value like "0.1-0.9" [default: 0.99].
+  -s <n>        Set start position of the video by seconds.
+  --debug       Flag for debugging [default: false].
+  -h --help     Show this screen.
+DOC
+
+begin
+  options = Docopt::docopt doc
+  mktmpdir(options['--debug']) do |tmpdir|
+    other_options = ''
+    other_options += ' -t ' + options['-d']
+    other_options += ' -ss ' + options['-s'] if options['-s']
+    cmd = Cocaine::CommandLine.new 'ffmpeg', '-i :infile %s -c:v huffyuv -pix_fmt yuv422p -y -q:v 0 -an :outfile' % other_options
+    huffyuvfile = tmpdir.join('huffyuv.avi')
+    cmd.run infile: options['<infile>'], outfile: huffyuvfile.to_s
+    a = AviGlitch.open huffyuvfile
+    l = a.frames.size.to_f
+    pos = options['-r'].split '-'
+    pos[1] = pos[0] if pos[1].nil?
+    sp, ep = pos.collect {|p| p.to_f }
+    a.glitch_with_index do |f, i|
+      p = i / l
+      ratio = (ep - sp) * p + sp
+      f[0, (1 - ratio) * f.size]
+    end
+    glitchfile = tmpdir.join 'glitch.avi'
+    a.output glitchfile
+    cmd = Cocaine::CommandLine.new 'avconv', '-i :infile -an -q:v 0 -c:v mpeg4 :outfile'
+    cmd.run infile: glitchfile.to_s, outfile: options['-o']
+  end
+rescue Docopt::Exit => e
+  puts e.message
+end