1 files changed, 7 insertions, 1 deletions
diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index 4107e7a5fa..bee03d2876 100644
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -1875,7 +1875,13 @@ static int mpeg_decode_slice(AVCodecContext *avctx,
         }
 
         if (++s->mb_x >= s->mb_width) {
-            ff_draw_horiz_band(s);
+            if(s->picture_structure==PICT_FRAME){
+                ff_draw_horiz_band(s, 16*s->mb_y, 16);
+            }else{
+                if(!s->first_field){
+                    ff_draw_horiz_band(s, 32*s->mb_y, 32);
+                }
+            }
 
             s->mb_x = 0;
             s->mb_y++;