Added displaymatrix value and display rotation

lib/ffmpeg/movie.rb

@@ -6,6 +6,7 @@
 module FFMPEG
   class Movie
     attr_reader :path, :duration, :time, :bitrate, :rotation, :creation_time
+    attr_reader :displaymatrix, :display_rotation
     attr_reader :video_stream, :video_codec, :video_bitrate, :colorspace, :width, :height, :sar, :dar, :frame_rate
     attr_reader :audio_streams, :audio_stream, :audio_codec, :audio_bitrate, :audio_sample_rate, :audio_channels, :audio_tags
     attr_reader :container
@@ -60,8 +61,16 @@ def initialize(path)
 
         @time = @metadata[:format][:start_time].to_f
 
+
+        output[/Audio:\ (.*)/]
+        @audio_stream = $1
+
+        output[/displaymatrix:\ (.*)/]
+        @displaymatrix = $1
+
         @format_tags = @metadata[:format][:tags]
 
+
         @creation_time = if @format_tags and @format_tags.key?(:creation_time)
                            begin
                              Time.parse(@format_tags[:creation_time])
@@ -125,6 +134,10 @@ def initialize(path)
         end
 
       end
+
+      if displaymatrix
+        @display_rotation=displaymatrix[/(-|)(\d+.\d+)/]
+      end
 
       unsupported_stream_ids = unsupported_streams(std_error)
       nil_or_unsupported = ->(stream) { stream.nil? || unsupported_stream_ids.include?(stream[:index]) }