namusyaka · August 29, 2015 14:13 · Jan 10, 2015 · Jan 10, 2015
diff --git a/gistfile1.rb b/gistfile1.rb
@@ -60,7 +60,7 @@ def each_duration(&block)
     if @duration.respond_to?(:call)
       @duration.call @movie
     else
-      @duration.instance_of?(Range) ? @duration.each : @duration.times
+      @duration.instance_of?(Range) ? @duration : @duration.times
     end.each(&block)
   end
 end
diff --git a/gistfile1.rb b/gistfile1.rb
@@ -0,0 +1,66 @@
+require 'fileutils'
+require 'RMagick'
+require 'streamio-ffmpeg'
+
+class Turmeric
+  DEFAULT_OPTIONS = {
+    tmp_dir: "./tmp/",
+    resolution: "200x100",
+    duration: ->(movie){ movie.duration.to_i.times }
+  }.freeze
+
+  attr_accessor :tmp_dir, :resolution, :duration
+  attr_reader :frames
+
+  def initialize(filename, **options)
+    @movie = FFMPEG::Movie.new(filename)
+    reset(**options)
+  end
+
+  def reset(**options)
+    @frames = []
+    @tmp_dir = options[:tmp_dir] || DEFAULT_OPTIONS[:tmp_dir]
+    @resolution = options[:resolution] || DEFAULT_OPTIONS[:resolution]
+    @duration = options[:duration] || DEFAULT_OPTIONS[:duration]
+  end
+
+  def logger
+    FFMPEG.logger
+  end
+
+  def logger=(logger)
+    FFMPEG.logger = logger
+  end
+
+  def screenshot(path, **options)
+    @movie.screenshot(path, resolution: resolution,  **options)
+  end
+
+  def ensure_output_directory
+    FileUtils.mkdir_p(tmp_dir)
+  end
+
+  def to_animation(output_file = "result.gif")
+    ensure_output_directory unless File.exist?(tmp_dir)
+    each_duration do |second|
+      path = "#{tmp_dir}#{second}.png"
+      begin
+        screenshot(path, seek_time: second)
+      ensure
+        frames << path
+      end
+    end
+    Magick::ImageList.new(*frames).coalesce.write(output_file)
+  ensure
+    FileUtils.rm(Dir.glob(File.join(tmp_dir, "*")))
+  end
+  alias to_anime to_animation
+
+  def each_duration(&block)
+    if @duration.respond_to?(:call)
+      @duration.call @movie
+    else
+      @duration.instance_of?(Range) ? @duration.each : @duration.times
+    end.each(&block)
+  end
+end