diff --git a/host/Shaders/RGBtoYUV.hlsl b/host/Shaders/RGBtoYUV.hlsl
index a6ce5288..e3b73350 100644
--- a/host/Shaders/RGBtoYUV.hlsl
+++ b/host/Shaders/RGBtoYUV.hlsl
@@ -19,13 +19,13 @@ OUT main(VS input)
   OUT o;
   const float4 rgba = texTexture.Sample(texSampler, input.tex);
 
-  o.y.gba = 0.0f;
-  o.u.gba = 0.0f;
-  o.v.gba = 0.0f;
+  o.y.gba = 1.0f;
+  o.u.gba = 1.0f;
+  o.v.gba = 1.0f;
 
   o.y.r  = rgba.r * 0.2126 + 0.7152 * rgba.g + 0.0722 * rgba.b;
-  o.u.r = (rgba.b - o.y.r) / 1.8556;
-  o.v.r = (rgba.r - o.y.r) / 1.5748;
+  o.u.r = ((rgba.b - o.y.r) / 1.8556) + 0.5;
+  o.v.r = ((rgba.r - o.y.r) / 1.5748) + 0.5;
 
   return o;
 }
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