diff --git a/ext/cog/cog.orc b/ext/cog/cog.orc
index 2322312499..e08d98f9cd 100644
--- a/ext/cog/cog.orc
+++ b/ext/cog/cog.orc
@@ -53,48 +53,6 @@ avgub t4, t4, t5
 avgub d1, t2, t4
 
 
-.function cogorc_downsample_420_mpeg2
-.dest 1 d1
-.source 2 s1
-.source 2 s2
-.source 2 s3
-.source 2 s4
-.temp 1 t1
-.temp 1 t2
-.temp 1 t3
-.temp 2 t4
-.temp 2 t5
-.temp 2 t6
-.temp 2 t7
-
-copyw t4, s1
-select0wb t1, t4
-select1wb t2, t4
-select0wb t3, s2
-convubw t4, t1
-convubw t5, t2
-convubw t6, t3
-mullw t5, t5, 2
-addw t4, t4, t6
-addw t7, t4, t5
-copyw t4, s3
-
-select0wb t1, t4
-select1wb t2, t4
-select0wb t3, s4
-convubw t4, t1
-convubw t5, t2
-convubw t6, t3
-mullw t5, t5, 2
-addw t4, t4, t6
-addw t4, t4, t5
-
-addw t7, t7, t4
-addw t7, t7, 4
-shrsw t7, t7, 3
-convsuswb d1, t7
-
-
 .function cogorc_downsample_vert_halfsite_2tap
 .dest 1 d1
 .source 1 s1
diff --git a/ext/cog/cogvirtframe.c b/ext/cog/cogvirtframe.c
index 1adfef4044..93f3849329 100644
--- a/ext/cog/cogvirtframe.c
+++ b/ext/cog/cogvirtframe.c
@@ -1617,10 +1617,27 @@ convert_444_420_mpeg2 (CogFrame * frame, void *_dest, int component, int i)
     src2 = cog_virt_frame_get_line (frame->virt_frame1, component,
         CLAMP (i * 2 + 1, 0, n_src - 1));
 
+#if 0
     cogorc_downsample_420_mpeg2 (dest + 1,
         (uint16_t *) src1, (uint16_t *) (src1 + 2),
         (uint16_t *) src2, (uint16_t *) (src2 + 2),
         frame->components[component].width - 1);
+#else
+    {
+      int j;
+      int x;
+
+      for (j = 1; j < frame->components[component].width - 1; j++) {
+        x = 1 * src1[j * 2 - 1];
+        x += 2 * src1[j * 2 + 0];
+        x += 1 * src1[j * 2 + 1];
+        x += 1 * src2[j * 2 - 1];
+        x += 2 * src2[j * 2 + 0];
+        x += 1 * src2[j * 2 + 1];
+        dest[j] = CLAMP ((x + 4) >> 3, 0, 255);
+      }
+    }
+#endif
     {
       int j;
       int x;