diff --git a/AVQt/textureES.fsh b/AVQt/textureES.fsh
index afafe9e0fe884ed5be7f037cf47adc55b7e3b2e4..fb53f0b7ba18c150d40e82324e63f3a7d68b35ed 100644
--- a/AVQt/textureES.fsh
+++ b/AVQt/textureES.fsh
@@ -34,7 +34,7 @@ void main() {
         finalColor = vec4(rgb, 1.0f);
     } else if (inputFormat == 2) { // YUV420P
         mediump vec3 yuv;
-        yuv.x = texture(textureY, newTexCoord.st).r;
+        yuv.x = texture(textureY, newTexCoord.st).r * 4;
         //        yuv.x = texture(textureY, newTexCoord.st).r - 0.0625;
         yuv.y = texture(textureU, newTexCoord.st).r - 0.5;
         yuv.z = texture(textureV, newTexCoord.st).r - 0.5;