fix: rotation is not calculated for media with multiple side data elements

.rubocop.yml

@@ -37,3 +37,6 @@ Style/ArgumentsForwarding:
 
 Style/FloatDivision:
   Enabled: false
+
+Style/SafeNavigationChainLength:
+  Enabled: false

CHANGELOG

@@ -1,3 +1,7 @@
+== 6.1.2 2024-11-07
+Fixes:
+* Calculate rotation correctly for media files with multiple side data elements
+
 == 6.1.1 2024-11-04
 
 Fixes:

lib/ffmpeg/stream.rb

@@ -44,12 +44,18 @@ def initialize(metadata, stderr = '')
       @coded_height = metadata[:coded_height]
       @sample_aspect_ratio = metadata[:sample_aspect_ratio]
       @display_aspect_ratio = metadata[:display_aspect_ratio]
-      @rotation = if metadata[:tags]&.key?(:rotate)
-                    metadata[:tags][:rotate].to_i
-                  elsif metadata[:side_data_list]&.first&.key?(:rotation)
-                    rotation = metadata[:side_data_list].first[:rotation].to_i
-                    rotation.positive? ? 360 - rotation : rotation.abs
-                  end
+
+      @rotation =
+        if metadata.dig(:tags, :rotate)
+          metadata.dig(:tags, :rotate).to_i
+        else
+          metadata[:side_data_list]
+            &.find { |data| data[:side_data_type] =~ /display matrix/i }
+            &.dig(:rotation)
+            &.to_i
+            &.tap { |value| break value + 180 if value % 180 != 0 }
+            &.abs
+        end
 
       @color_range = metadata[:color_range]
       @color_space = metadata[:pix_fmt] || metadata[:color_space]

lib/ffmpeg/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module FFMPEG
-  VERSION = '6.1.1'
+  VERSION = '6.1.2'
 end