diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index a53be146e7..c3f2f2e4a5 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -90,7 +90,7 @@ static void h264_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
     fill_rectangle(&sl->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
     fill_rectangle(sl->mv_cache[0][scan8[0]], 4, 4, 8,
                    pack16to32((*mv)[0][0][0], (*mv)[0][0][1]), 4);
-    h->mb_mbaff =
+    sl->mb_mbaff =
     sl->mb_field_decoding_flag = 0;
     ff_h264_hl_decode_mb(h, &h->slice_ctx[0]);
 }
diff --git a/libavcodec/h264.h b/libavcodec/h264.h
index e5a6a17c50..45545b6cdb 100644
--- a/libavcodec/h264.h
+++ b/libavcodec/h264.h
@@ -402,6 +402,7 @@ typedef struct H264SliceContext {
     int is_complex;
 
     int mb_field_decoding_flag;
+    int mb_mbaff;               ///< mb_aff_frame && mb_field_decoding_flag
 
     int redundant_pic_count;
 
@@ -539,7 +540,6 @@ typedef struct H264Context {
 
     // interlacing specific flags
     int mb_aff_frame;
-    int mb_mbaff;               ///< mb_aff_frame && mb_field_decoding_flag
     int picture_structure;
     int first_field;
 
diff --git a/libavcodec/h264_cabac.c b/libavcodec/h264_cabac.c
index 90dd9f9641..ec9167efbe 100644
--- a/libavcodec/h264_cabac.c
+++ b/libavcodec/h264_cabac.c
@@ -1933,7 +1933,7 @@ int ff_h264_decode_mb_cabac(H264Context *h, H264SliceContext *sl)
                 h->cur_pic.mb_type[mb_xy] = MB_TYPE_SKIP;
                 sl->next_mb_skipped = decode_cabac_mb_skip(h, sl, sl->mb_x, sl->mb_y+1 );
                 if(!sl->next_mb_skipped)
-                    h->mb_mbaff = sl->mb_field_decoding_flag = decode_cabac_field_decoding_flag(h, sl);
+                    sl->mb_mbaff = sl->mb_field_decoding_flag = decode_cabac_field_decoding_flag(h, sl);
             }
 
             decode_mb_skip(h, sl);
@@ -1948,7 +1948,7 @@ int ff_h264_decode_mb_cabac(H264Context *h, H264SliceContext *sl)
     }
     if (FRAME_MBAFF(h)) {
         if ((sl->mb_y & 1) == 0)
-            h->mb_mbaff =
+            sl->mb_mbaff =
             sl->mb_field_decoding_flag = decode_cabac_field_decoding_flag(h, sl);
     }
 
@@ -2057,8 +2057,8 @@ decode_intra_mb:
         return 0;
     }
 
-    local_ref_count[0] = sl->ref_count[0] << MB_MBAFF(h);
-    local_ref_count[1] = sl->ref_count[1] << MB_MBAFF(h);
+    local_ref_count[0] = sl->ref_count[0] << MB_MBAFF(sl);
+    local_ref_count[1] = sl->ref_count[1] << MB_MBAFF(sl);
 
     fill_decode_caches(h, sl, mb_type);
 
diff --git a/libavcodec/h264_cavlc.c b/libavcodec/h264_cavlc.c
index 45e2096849..0e26ff22ae 100644
--- a/libavcodec/h264_cavlc.c
+++ b/libavcodec/h264_cavlc.c
@@ -723,7 +723,7 @@ int ff_h264_decode_mb_cavlc(H264Context *h, H264SliceContext *sl)
         if (sl->mb_skip_run--) {
             if (FRAME_MBAFF(h) && (sl->mb_y & 1) == 0) {
                 if (sl->mb_skip_run == 0)
-                    h->mb_mbaff = sl->mb_field_decoding_flag = get_bits1(&sl->gb);
+                    sl->mb_mbaff = sl->mb_field_decoding_flag = get_bits1(&sl->gb);
             }
             decode_mb_skip(h, sl);
             return 0;
@@ -731,7 +731,7 @@ int ff_h264_decode_mb_cavlc(H264Context *h, H264SliceContext *sl)
     }
     if (FRAME_MBAFF(h)) {
         if ((sl->mb_y & 1) == 0)
-            h->mb_mbaff = sl->mb_field_decoding_flag = get_bits1(&sl->gb);
+            sl->mb_mbaff = sl->mb_field_decoding_flag = get_bits1(&sl->gb);
     }
 
     sl->prev_mb_skipped = 0;
@@ -794,8 +794,8 @@ decode_intra_mb:
         return 0;
     }
 
-    local_ref_count[0] = sl->ref_count[0] << MB_MBAFF(h);
-    local_ref_count[1] = sl->ref_count[1] << MB_MBAFF(h);
+    local_ref_count[0] = sl->ref_count[0] << MB_MBAFF(sl);
+    local_ref_count[1] = sl->ref_count[1] << MB_MBAFF(sl);
 
     fill_decode_neighbors(h, sl, mb_type);
     fill_decode_caches(h, sl, mb_type);
diff --git a/libavcodec/h264_mb.c b/libavcodec/h264_mb.c
index dcd65a9464..b33c63c130 100644
--- a/libavcodec/h264_mb.c
+++ b/libavcodec/h264_mb.c
@@ -173,7 +173,7 @@ static void await_references(const H264Context *h, H264SliceContext *sl)
                 int ref_field_picture = ref_pic->field_picture;
                 int pic_height        = 16 * h->mb_height >> ref_field_picture;
 
-                row <<= MB_MBAFF(h);
+                row <<= MB_MBAFF(sl);
                 nrefs[list]--;
 
                 if (!FIELD_PICTURE(h) && ref_field_picture) { // frame referencing two fields
@@ -520,10 +520,10 @@ static av_always_inline void xchg_mb_border(const H264Context *h, H264SliceConte
 
     if (!simple && FRAME_MBAFF(h)) {
         if (sl->mb_y & 1) {
-            if (!MB_MBAFF(h))
+            if (!MB_MBAFF(sl))
                 return;
         } else {
-            top_idx = MB_MBAFF(h) ? 0 : 1;
+            top_idx = MB_MBAFF(sl) ? 0 : 1;
         }
     }
 
diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c
index d81dd9077b..0e72a81a53 100644
--- a/libavcodec/h264_slice.c
+++ b/libavcodec/h264_slice.c
@@ -794,7 +794,7 @@ static av_always_inline void backup_mb_border(H264Context *h, H264SliceContext *
 
     if (!simple && FRAME_MBAFF(h)) {
         if (sl->mb_y & 1) {
-            if (!MB_MBAFF(h)) {
+            if (!MB_MBAFF(sl)) {
                 top_border = h->top_borders[0][sl->mb_x];
                 AV_COPY128(top_border, src_y + 15 * linesize);
                 if (pixel_shift)
@@ -829,7 +829,7 @@ static av_always_inline void backup_mb_border(H264Context *h, H264SliceContext *
                     }
                 }
             }
-        } else if (MB_MBAFF(h)) {
+        } else if (MB_MBAFF(sl)) {
             top_idx = 0;
         } else
             return;
@@ -1513,7 +1513,7 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl, H264Contex
         }
     }
 
-    h->mb_mbaff        = 0;
+    sl->mb_mbaff       = 0;
     h->mb_aff_frame    = 0;
     last_pic_structure = h0->picture_structure;
     last_pic_droppable = h0->droppable;
@@ -2053,7 +2053,7 @@ static av_always_inline void fill_filter_caches_inter(H264Context *h,
         if (USES_LIST(top_type, list)) {
             const int b_xy  = h->mb2b_xy[top_xy] + 3 * b_stride;
             const int b8_xy = 4 * top_xy + 2;
-            int (*ref2frm)[64] = (void*)(sl->ref2frm[h->slice_table[top_xy] & (MAX_SLICES - 1)][0] + (MB_MBAFF(h) ? 20 : 2));
+            int (*ref2frm)[64] = (void*)(sl->ref2frm[h->slice_table[top_xy] & (MAX_SLICES - 1)][0] + (MB_MBAFF(sl) ? 20 : 2));
             AV_COPY128(mv_dst - 1 * 8, h->cur_pic.motion_val[list][b_xy + 0]);
             ref_cache[0 - 1 * 8] =
             ref_cache[1 - 1 * 8] = ref2frm[list][h->cur_pic.ref_index[list][b8_xy + 0]];
@@ -2068,7 +2068,7 @@ static av_always_inline void fill_filter_caches_inter(H264Context *h,
             if (USES_LIST(left_type[LTOP], list)) {
                 const int b_xy  = h->mb2b_xy[left_xy[LTOP]] + 3;
                 const int b8_xy = 4 * left_xy[LTOP] + 1;
-                int (*ref2frm)[64] =(void*)( sl->ref2frm[h->slice_table[left_xy[LTOP]] & (MAX_SLICES - 1)][0] + (MB_MBAFF(h) ? 20 : 2));
+                int (*ref2frm)[64] =(void*)( sl->ref2frm[h->slice_table[left_xy[LTOP]] & (MAX_SLICES - 1)][0] + (MB_MBAFF(sl) ? 20 : 2));
                 AV_COPY32(mv_dst - 1 +  0, h->cur_pic.motion_val[list][b_xy + b_stride * 0]);
                 AV_COPY32(mv_dst - 1 +  8, h->cur_pic.motion_val[list][b_xy + b_stride * 1]);
                 AV_COPY32(mv_dst - 1 + 16, h->cur_pic.motion_val[list][b_xy + b_stride * 2]);
@@ -2101,7 +2101,7 @@ static av_always_inline void fill_filter_caches_inter(H264Context *h,
 
     {
         int8_t *ref = &h->cur_pic.ref_index[list][4 * mb_xy];
-        int (*ref2frm)[64] = (void*)(sl->ref2frm[sl->slice_num & (MAX_SLICES - 1)][0] + (MB_MBAFF(h) ? 20 : 2));
+        int (*ref2frm)[64] = (void*)(sl->ref2frm[sl->slice_num & (MAX_SLICES - 1)][0] + (MB_MBAFF(sl) ? 20 : 2));
         uint32_t ref01 = (pack16to32(ref2frm[list][ref[0]], ref2frm[list][ref[1]]) & 0x00FF00FF) * 0x0101;
         uint32_t ref23 = (pack16to32(ref2frm[list][ref[2]], ref2frm[list][ref[3]]) & 0x00FF00FF) * 0x0101;
         AV_WN32A(&ref_cache[0 * 8], ref01);
@@ -2287,7 +2287,7 @@ static void loop_filter(H264Context *h, H264SliceContext *sl, int start_x, int e
                 sl->list_count = h->list_counts[mb_xy];
 
                 if (FRAME_MBAFF(h))
-                    h->mb_mbaff               =
+                    sl->mb_mbaff               =
                     sl->mb_field_decoding_flag = !!IS_INTERLACED(mb_type);
 
                 sl->mb_x = mb_x;
@@ -2344,7 +2344,7 @@ static void predict_field_decoding_flag(H264Context *h, H264SliceContext *sl)
                       h->cur_pic.mb_type[mb_xy - 1] :
                       (h->slice_table[mb_xy - h->mb_stride] == sl->slice_num) ?
                       h->cur_pic.mb_type[mb_xy - h->mb_stride] : 0;
-    h->mb_mbaff     = sl->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
+    sl->mb_mbaff    = sl->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
 }
 
 /**