diff --git a/android/opengl/system/OpenglSystemCommon/FormatConversions.cpp b/android/opengl/system/OpenglSystemCommon/FormatConversions.cpp
index 6473b48dbf1e280a3c0aea3f9778dae7b4edc3a5..da8dfa26ca13966ba04ad9c9fee07a2150eeec25 100644
--- a/android/opengl/system/OpenglSystemCommon/FormatConversions.cpp
+++ b/android/opengl/system/OpenglSystemCommon/FormatConversions.cpp
@@ -96,8 +96,8 @@ void rgb565_to_yv12(char *dest, char *src, int width, int height, int left, int
             yv12_y[i] = clamp_rgb((77 * R + 150 * G + 29 * B) >> 8);
             bool ieven = (i & 1) == 0;
             if (jeven && ieven) {
-                yv12_u[i] = clamp_rgb(((-43 * R - 85 * G + 128 * B) >> 8) + 128);
-                yv12_v[i] = clamp_rgb(((128 * R - 107 * G - 21 * B) >> 8) + 128);
+                yv12_u[i/2] = clamp_rgb(((-43 * R - 85 * G + 128 * B) >> 8) + 128);
+                yv12_v[i/2] = clamp_rgb(((128 * R - 107 * G - 21 * B) >> 8) + 128);
             }
         }
     }
@@ -132,8 +132,8 @@ void rgb888_to_yv12(char *dest, char *src, int width, int height, int left, int
             yv12_y[i] = clamp_rgb((77 * R + 150 * G + 29 * B) >> 8);
             bool ieven = (i & 1) == 0;
             if (jeven && ieven) {
-                yv12_u[i] = clamp_rgb(((-43 * R - 85 * G + 128 * B) >> 8) + 128);
-                yv12_v[i] = clamp_rgb(((128 * R - 107 * G - 21 * B) >> 8) + 128);
+                yv12_u[i/2] = clamp_rgb(((-43 * R - 85 * G + 128 * B) >> 8) + 128);
+                yv12_v[i/2] = clamp_rgb(((128 * R - 107 * G - 21 * B) >> 8) + 128);
             }
         }
     }