diff --git a/GlmToolkit.cpp b/GlmToolkit.cpp
index c748f8e..f2d23e5 100644
--- a/GlmToolkit.cpp
+++ b/GlmToolkit.cpp
@@ -186,7 +186,7 @@ glm::ivec2 GlmToolkit::resolutionFromDescription(int aspectratio, int height)
     int h  = glm::clamp(height, 0, 8);
 
     static glm::vec2 aspect_ratio_size[6] = { glm::vec2(1.f,1.f), glm::vec2(4.f,3.f), glm::vec2(3.f,2.f), glm::vec2(16.f,10.f), glm::vec2(16.f,9.f), glm::vec2(21.f,9.f) };
-    static float resolution_height[9] = { 16.f, 64.f, 200.f, 320.f, 480.f, 720.f, 1080.f, 1440.f, 2160.f };
+    static float resolution_height[10] = { 16.f, 64.f, 200.f, 320.f, 480.f, 576.f, 720.f, 1080.f, 1440.f, 2160.f };
 
     float width = aspect_ratio_size[ar].x * resolution_height[h] / aspect_ratio_size[ar].y;
     glm::ivec2 res = glm::ivec2( width, resolution_height[h]);
diff --git a/PatternSource.cpp b/PatternSource.cpp
index 1abb44c..1a65e2c 100644
--- a/PatternSource.cpp
+++ b/PatternSource.cpp
@@ -109,7 +109,7 @@ void Pattern::open( uint pattern, glm::ivec2 res )
     case 17:
     {
         std::ostringstream oss;
-        oss << " kx2=" << (int)(aspectRatio() * 10.f) << " ky2=10 kt=4";
+        oss << " kx2=" << (int)(res.x * 10.f / res.y) << " ky2=10 kt=4";
         gstreamer_pattern += oss.str(); // Zone plate
     }
         break;