bin/datamosh in aviglitch-0.0.2 vs bin/datamosh in aviglitch-0.0.3

@@ -5,47 +5,44 @@
 require 'rubygems'
 require 'aviglitch'
 
 output = './out.avi'
 all = false
-force = false
 
 opts = OptionParser.new do |opts|
   opts.banner = "datamosh - AviGlitch's datamoshing video generator."
   opts.define_head "Usage: #{File.basename($0)} <input> [options]"
   opts.separator "Options:"
   opts.on("-o", "--output [OUTPUT]", 
     "Output the video to OUTPUT (./out.avi by default)") do |f|
     output = f
   end
-  opts.on("-f", "--force", "Overwrite an existing output file") do
-    force = true
-  end
   opts.on("-a", "--all", 
     "Remove all keyframes (It remains a first keyframe by default)") do
     all = true
   end
   opts.on_tail("-h", "--help", "Show this message") do
     puts opts
     exit
   end
 end
+
 input = opts.parse!
 if input.empty?
   puts opts
   exit 1
 end
-if !force && File.exists?(output)
-  puts "!!! `#{output}' already exists. Use -f option to overwrite."
-  exit 1
-end
 
-a = AviGlitch.open input.first
+a = AviGlitch.open input.shift
 a.glitch_with_index :keyframe do |frame, i|
-  if !all && i == 0  # keep the first frame
-    frame
-  else
+  (!all && i == 0) ? frame : "\000" * frame.size # keep the first frame
+end
+input.each do |file|
+  b = AviGlitch.open file
+  b.glitch :keyframe do |frame|
     "\000" * frame.size
   end
+  a.frames.concat b.frames
 end
-a.output(output)
+
+a.output output