diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c
index d6a85a037a..c9d9e2a764 100644
--- a/libavcodec/mpegvideo_enc.c
+++ b/libavcodec/mpegvideo_enc.c
@@ -2558,24 +2558,35 @@ static int sse(MpegEncContext *s, uint8_t *src1, uint8_t *src2, int w, int h, in
 static int sse_mb(MpegEncContext *s){
     int w= 16;
     int h= 16;
+    int chroma_mb_w = w >> s->chroma_x_shift;
+    int chroma_mb_h = h >> s->chroma_y_shift;
 
     if(s->mb_x*16 + 16 > s->width ) w= s->width - s->mb_x*16;
     if(s->mb_y*16 + 16 > s->height) h= s->height- s->mb_y*16;
 
     if(w==16 && h==16)
       if(s->avctx->mb_cmp == FF_CMP_NSSE){
-        return s->mecc.nsse[0](s, s->new_picture->data[0] + s->mb_x * 16 + s->mb_y * s->linesize   * 16, s->dest[0], s->linesize,   16) +
-               s->mecc.nsse[1](s, s->new_picture->data[1] + s->mb_x *  8 + s->mb_y * s->uvlinesize *  8, s->dest[1], s->uvlinesize,  8) +
-               s->mecc.nsse[1](s, s->new_picture->data[2] + s->mb_x *  8 + s->mb_y * s->uvlinesize *  8, s->dest[2], s->uvlinesize,  8);
+        return s->mecc.nsse[0](s, s->new_picture->data[0] + s->mb_x * 16 + s->mb_y * s->linesize * 16,
+                               s->dest[0], s->linesize, 16) +
+               s->mecc.nsse[1](s, s->new_picture->data[1] + s->mb_x * chroma_mb_w + s->mb_y * s->uvlinesize * chroma_mb_h,
+                               s->dest[1], s->uvlinesize, chroma_mb_h) +
+               s->mecc.nsse[1](s, s->new_picture->data[2] + s->mb_x * chroma_mb_w + s->mb_y * s->uvlinesize * chroma_mb_h,
+                               s->dest[2], s->uvlinesize, chroma_mb_h);
       }else{
-        return s->mecc.sse[0](NULL, s->new_picture->data[0] + s->mb_x * 16 + s->mb_y * s->linesize   * 16, s->dest[0], s->linesize,   16) +
-               s->mecc.sse[1](NULL, s->new_picture->data[1] + s->mb_x *  8 + s->mb_y * s->uvlinesize *  8, s->dest[1], s->uvlinesize,  8) +
-               s->mecc.sse[1](NULL, s->new_picture->data[2] + s->mb_x *  8 + s->mb_y * s->uvlinesize *  8, s->dest[2], s->uvlinesize,  8);
+        return s->mecc.sse[0](NULL, s->new_picture->data[0] + s->mb_x * 16 + s->mb_y * s->linesize * 16,
+                              s->dest[0], s->linesize, 16) +
+               s->mecc.sse[1](NULL, s->new_picture->data[1] + s->mb_x * chroma_mb_w + s->mb_y * s->uvlinesize * chroma_mb_h,
+                              s->dest[1], s->uvlinesize, chroma_mb_h) +
+               s->mecc.sse[1](NULL, s->new_picture->data[2] + s->mb_x * chroma_mb_w + s->mb_y * s->uvlinesize * chroma_mb_h,
+                              s->dest[2], s->uvlinesize, chroma_mb_h);
       }
     else
-        return  sse(s, s->new_picture->data[0] + s->mb_x*16 + s->mb_y*s->linesize*16, s->dest[0], w, h, s->linesize)
-               +sse(s, s->new_picture->data[1] + s->mb_x*8  + s->mb_y*s->uvlinesize*8,s->dest[1], w>>1, h>>1, s->uvlinesize)
-               +sse(s, s->new_picture->data[2] + s->mb_x*8  + s->mb_y*s->uvlinesize*8,s->dest[2], w>>1, h>>1, s->uvlinesize);
+        return  sse(s, s->new_picture->data[0] + s->mb_x * 16 + s->mb_y * s->linesize * 16,
+                    s->dest[0], w, h, s->linesize) +
+                sse(s, s->new_picture->data[1] + s->mb_x * chroma_mb_w + s->mb_y * s->uvlinesize * chroma_mb_h,
+                    s->dest[1], w >> s->chroma_x_shift, h >> s->chroma_y_shift, s->uvlinesize) +
+                sse(s, s->new_picture->data[2] + s->mb_x * chroma_mb_w + s->mb_y * s->uvlinesize * chroma_mb_h,
+                    s->dest[2], w >> s->chroma_x_shift, h >> s->chroma_y_shift, s->uvlinesize);
 }
 
 static int pre_estimate_motion_thread(AVCodecContext *c, void *arg){
diff --git a/tests/ref/seek/vsynth_lena-mpeg2-422 b/tests/ref/seek/vsynth_lena-mpeg2-422
index 06d8f7ac3a..1fc2bf93a0 100644
--- a/tests/ref/seek/vsynth_lena-mpeg2-422
+++ b/tests/ref/seek/vsynth_lena-mpeg2-422
@@ -1,46 +1,46 @@
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: NOPTS    pos:      0 size: 17497
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: NOPTS    pos:      0 size: 18339
 ret: 0         st:-1 flags:0  ts:-1.000000
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: NOPTS    pos:      0 size: 17497
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: NOPTS    pos:      0 size: 18339
 ret: 0         st:-1 flags:1  ts: 1.894167
-ret: 0         st: 0 flags:1 dts: 1.840000 pts: NOPTS    pos: 325397 size: 19967
+ret: 0         st: 0 flags:1 dts: 1.840000 pts: NOPTS    pos: 329242 size: 21479
 ret: 0         st: 0 flags:0  ts: 0.788334
-ret: 0         st: 0 flags:1 dts: 0.880000 pts: NOPTS    pos: 200747 size: 22575
+ret: 0         st: 0 flags:1 dts: 0.880000 pts: NOPTS    pos: 203086 size: 24774
 ret:-1         st: 0 flags:1  ts:-0.317499
 ret:-1         st:-1 flags:0  ts: 2.576668
 ret: 0         st:-1 flags:1  ts: 1.470835
-ret: 0         st: 0 flags:1 dts: 1.360000 pts: NOPTS    pos: 265466 size: 21329
+ret: 0         st: 0 flags:1 dts: 1.360000 pts: NOPTS    pos: 268154 size: 22845
 ret: 0         st: 0 flags:0  ts: 0.365002
-ret: 0         st: 0 flags:1 dts: 0.400000 pts: NOPTS    pos: 104454 size: 28984
+ret: 0         st: 0 flags:1 dts: 0.400000 pts: NOPTS    pos: 108763 size: 32204
 ret:-1         st: 0 flags:1  ts:-0.740831
 ret:-1         st:-1 flags:0  ts: 2.153336
 ret: 0         st:-1 flags:1  ts: 1.047503
-ret: 0         st: 0 flags:1 dts: 0.880000 pts: NOPTS    pos: 200747 size: 22575
+ret: 0         st: 0 flags:1 dts: 0.880000 pts: NOPTS    pos: 203086 size: 24774
 ret: 0         st: 0 flags:0  ts:-0.058330
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: NOPTS    pos:      0 size: 17497
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: NOPTS    pos:      0 size: 18339
 ret: 0         st: 0 flags:1  ts: 2.835837
-ret: 0         st: 0 flags:1 dts: 1.840000 pts: NOPTS    pos: 325397 size: 19967
+ret: 0         st: 0 flags:1 dts: 1.840000 pts: NOPTS    pos: 329242 size: 21479
 ret: 0         st:-1 flags:0  ts: 1.730004
-ret: 0         st: 0 flags:1 dts: 1.840000 pts: NOPTS    pos: 325397 size: 19967
+ret: 0         st: 0 flags:1 dts: 1.840000 pts: NOPTS    pos: 329242 size: 21479
 ret: 0         st:-1 flags:1  ts: 0.624171
-ret: 0         st: 0 flags:1 dts: 0.400000 pts: NOPTS    pos: 104454 size: 28984
+ret: 0         st: 0 flags:1 dts: 0.400000 pts: NOPTS    pos: 108763 size: 32204
 ret: 0         st: 0 flags:0  ts:-0.481662
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: NOPTS    pos:      0 size: 17497
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: NOPTS    pos:      0 size: 18339
 ret: 0         st: 0 flags:1  ts: 2.412505
-ret: 0         st: 0 flags:1 dts: 1.840000 pts: NOPTS    pos: 325397 size: 19967
+ret: 0         st: 0 flags:1 dts: 1.840000 pts: NOPTS    pos: 329242 size: 21479
 ret: 0         st:-1 flags:0  ts: 1.306672
-ret: 0         st: 0 flags:1 dts: 1.360000 pts: NOPTS    pos: 265466 size: 21329
+ret: 0         st: 0 flags:1 dts: 1.360000 pts: NOPTS    pos: 268154 size: 22845
 ret: 0         st:-1 flags:1  ts: 0.200839
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: NOPTS    pos:      0 size: 17497
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: NOPTS    pos:      0 size: 18339
 ret: 0         st: 0 flags:0  ts:-0.904994
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: NOPTS    pos:      0 size: 17497
+ret: 0         st: 0 flags:1 dts: 0.000000 pts: NOPTS    pos:      0 size: 18339
 ret: 0         st: 0 flags:1  ts: 1.989173
-ret: 0         st: 0 flags:1 dts: 1.840000 pts: NOPTS    pos: 325397 size: 19967
+ret: 0         st: 0 flags:1 dts: 1.840000 pts: NOPTS    pos: 329242 size: 21479
 ret: 0         st:-1 flags:0  ts: 0.883340
-ret: 0         st: 0 flags:1 dts: 1.360000 pts: NOPTS    pos: 265466 size: 21329
+ret: 0         st: 0 flags:1 dts: 1.360000 pts: NOPTS    pos: 268154 size: 22845
 ret:-1         st:-1 flags:1  ts:-0.222493
 ret:-1         st: 0 flags:0  ts: 2.671674
 ret: 0         st: 0 flags:1  ts: 1.565841
-ret: 0         st: 0 flags:1 dts: 1.360000 pts: NOPTS    pos: 265466 size: 21329
+ret: 0         st: 0 flags:1 dts: 1.360000 pts: NOPTS    pos: 268154 size: 22845
 ret: 0         st:-1 flags:0  ts: 0.460008
-ret: 0         st: 0 flags:1 dts: 0.880000 pts: NOPTS    pos: 200747 size: 22575
+ret: 0         st: 0 flags:1 dts: 0.880000 pts: NOPTS    pos: 203086 size: 24774
 ret:-1         st:-1 flags:1  ts:-0.645825
diff --git a/tests/ref/vsynth/vsynth1-mpeg2-422 b/tests/ref/vsynth/vsynth1-mpeg2-422
index e936ba463e..a39b2b4dce 100644
--- a/tests/ref/vsynth/vsynth1-mpeg2-422
+++ b/tests/ref/vsynth/vsynth1-mpeg2-422
@@ -1,4 +1,4 @@
-6e135a1a27235a320311a932147846b4 *tests/data/fate/vsynth1-mpeg2-422.mpeg2video
-730780 tests/data/fate/vsynth1-mpeg2-422.mpeg2video
-0273cd8463d1fc115378748239951560 *tests/data/fate/vsynth1-mpeg2-422.out.rawvideo
-stddev:   10.27 PSNR: 27.90 MAXDIFF:  162 bytes:  7603200/  7603200
+651f054730be04257498eeae08b3bdc5 *tests/data/fate/vsynth1-mpeg2-422.mpeg2video
+855859 tests/data/fate/vsynth1-mpeg2-422.mpeg2video
+10fd55dbd10b08f9271eb89617766be8 *tests/data/fate/vsynth1-mpeg2-422.out.rawvideo
+stddev:    9.38 PSNR: 28.68 MAXDIFF:  178 bytes:  7603200/  7603200
diff --git a/tests/ref/vsynth/vsynth2-mpeg2-422 b/tests/ref/vsynth/vsynth2-mpeg2-422
index ec7244f9f9..5da29b4eac 100644
--- a/tests/ref/vsynth/vsynth2-mpeg2-422
+++ b/tests/ref/vsynth/vsynth2-mpeg2-422
@@ -1,4 +1,4 @@
-b2fa9b73c3547191ecc01b8163abd4e5 *tests/data/fate/vsynth2-mpeg2-422.mpeg2video
-379164 tests/data/fate/vsynth2-mpeg2-422.mpeg2video
-704f6a96f93c2409219bd48b74169041 *tests/data/fate/vsynth2-mpeg2-422.out.rawvideo
-stddev:    4.17 PSNR: 35.73 MAXDIFF:   70 bytes:  7603200/  7603200
+fcaf6242ca4b706d392e40d9631e3465 *tests/data/fate/vsynth2-mpeg2-422.mpeg2video
+383946 tests/data/fate/vsynth2-mpeg2-422.mpeg2video
+474bb259f041bfb971691551f678fd09 *tests/data/fate/vsynth2-mpeg2-422.out.rawvideo
+stddev:    3.93 PSNR: 36.23 MAXDIFF:   69 bytes:  7603200/  7603200
diff --git a/tests/ref/vsynth/vsynth3-mpeg2-422 b/tests/ref/vsynth/vsynth3-mpeg2-422
index 2247f286e6..e83c23635c 100644
--- a/tests/ref/vsynth/vsynth3-mpeg2-422
+++ b/tests/ref/vsynth/vsynth3-mpeg2-422
@@ -1,4 +1,4 @@
-4d108b861715f1fa010fd70baea91793 *tests/data/fate/vsynth3-mpeg2-422.mpeg2video
-68612 tests/data/fate/vsynth3-mpeg2-422.mpeg2video
-73b16e906d07b6bbccf4b00d4a25302c *tests/data/fate/vsynth3-mpeg2-422.out.rawvideo
-stddev:    4.02 PSNR: 36.05 MAXDIFF:   46 bytes:    86700/    86700
+96dc854fc40a6410d4edc387b63ded1a *tests/data/fate/vsynth3-mpeg2-422.mpeg2video
+75445 tests/data/fate/vsynth3-mpeg2-422.mpeg2video
+5337fc0bfb789919cb3325a02d48eb82 *tests/data/fate/vsynth3-mpeg2-422.out.rawvideo
+stddev:    3.24 PSNR: 37.90 MAXDIFF:   27 bytes:    86700/    86700
diff --git a/tests/ref/vsynth/vsynth_lena-mpeg2-422 b/tests/ref/vsynth/vsynth_lena-mpeg2-422
index 5f11d4e7cd..85d598782c 100644
--- a/tests/ref/vsynth/vsynth_lena-mpeg2-422
+++ b/tests/ref/vsynth/vsynth_lena-mpeg2-422
@@ -1,4 +1,4 @@
-521ec92c0b8672011a43dd13db98c400 *tests/data/fate/vsynth_lena-mpeg2-422.mpeg2video
-356431 tests/data/fate/vsynth_lena-mpeg2-422.mpeg2video
-51ca353620f85db8b5b1c56f1a275add *tests/data/fate/vsynth_lena-mpeg2-422.out.rawvideo
-stddev:    3.15 PSNR: 38.14 MAXDIFF:   49 bytes:  7603200/  7603200
+87e5c69775b363db649c253050536045 *tests/data/fate/vsynth_lena-mpeg2-422.mpeg2video
+361341 tests/data/fate/vsynth_lena-mpeg2-422.mpeg2video
+93cefcf101e6d0814acfaa626a02be90 *tests/data/fate/vsynth_lena-mpeg2-422.out.rawvideo
+stddev:    2.97 PSNR: 38.67 MAXDIFF:   57 bytes:  7603200/  7603200
