diff --git a/libavcodec/h261dec.c b/libavcodec/h261dec.c
index 2fddc50aed..8e97309c72 100644
--- a/libavcodec/h261dec.c
+++ b/libavcodec/h261dec.c
@@ -573,8 +573,6 @@ static int h261_decode_frame(AVCodecContext *avctx, void *data,
 
     ff_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
     ff_dlog(avctx, "bytes=%x %x %x %x\n", buf[0], buf[1], buf[2], buf[3]);
-    s->flags  = avctx->flags;
-    s->flags2 = avctx->flags2;
 
     h->gob_start_code_skipped = 0;
 
diff --git a/libavcodec/h263.h b/libavcodec/h263.h
index dace2aee4d..91fc57ef3c 100644
--- a/libavcodec/h263.h
+++ b/libavcodec/h263.h
@@ -145,7 +145,7 @@ static inline int h263_get_motion_length(MpegEncContext * s, int val, int f_code
 }
 
 static inline void ff_h263_encode_motion_vector(MpegEncContext * s, int x, int y, int f_code){
-    if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){
+    if (s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT) {
         skip_put_bits(&s->pb,
             h263_get_motion_length(s, x, f_code)
            +h263_get_motion_length(s, y, f_code));
diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c
index f6f91f3167..827800f85a 100644
--- a/libavcodec/h263dec.c
+++ b/libavcodec/h263dec.c
@@ -150,7 +150,7 @@ static int get_consumed_bytes(MpegEncContext *s, int buf_size)
         /* We would have to scan through the whole buf to handle the weird
          * reordering ... */
         return buf_size;
-    } else if (s->flags & CODEC_FLAG_TRUNCATED) {
+    } else if (s->avctx->flags & CODEC_FLAG_TRUNCATED) {
         pos -= s->parse_context.last_index;
         // padding is not really read so this might be -1
         if (pos < 0)
@@ -377,9 +377,6 @@ int ff_h263_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
     int ret;
     AVFrame *pict = data;
 
-    s->flags  = avctx->flags;
-    s->flags2 = avctx->flags2;
-
     /* no supplementary picture */
     if (buf_size == 0) {
         /* special case for last picture */
@@ -394,7 +391,7 @@ int ff_h263_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
         return 0;
     }
 
-    if (s->flags & CODEC_FLAG_TRUNCATED) {
+    if (s->avctx->flags & CODEC_FLAG_TRUNCATED) {
         int next;
 
         if (CONFIG_MPEG4_DECODER && s->codec_id == AV_CODEC_ID_MPEG4) {
diff --git a/libavcodec/ituh263enc.c b/libavcodec/ituh263enc.c
index 5f15b2f77e..87a37a056b 100644
--- a/libavcodec/ituh263enc.c
+++ b/libavcodec/ituh263enc.c
@@ -459,7 +459,7 @@ void ff_h263_encode_mb(MpegEncContext * s,
     int16_t pred_dc;
     int16_t rec_intradc[6];
     int16_t *dc_ptr[6];
-    const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1);
+    const int interleaved_stats = s->avctx->flags & CODEC_FLAG_PASS1;
 
     if (!s->mb_intra) {
         /* compute cbp */
diff --git a/libavcodec/motion_est.c b/libavcodec/motion_est.c
index 3f4faa42e8..c51be8d89e 100644
--- a/libavcodec/motion_est.c
+++ b/libavcodec/motion_est.c
@@ -331,7 +331,7 @@ int ff_init_me(MpegEncContext *s){
     c->mb_flags = get_flags(c, 0, c->avctx->mb_cmp    &FF_CMP_CHROMA);
 
 /*FIXME s->no_rounding b_type*/
-    if(s->flags&CODEC_FLAG_QPEL){
+    if (s->avctx->flags & CODEC_FLAG_QPEL) {
         c->sub_motion_search= qpel_motion_search;
         c->qpel_avg = s->qdsp.avg_qpel_pixels_tab;
         if (s->no_rounding)
@@ -968,7 +968,7 @@ void ff_estimate_p_frame_motion(MpegEncContext * s,
             mx <<=shift;
             my <<=shift;
         }
-        if((s->flags&CODEC_FLAG_4MV)
+        if ((s->avctx->flags & CODEC_FLAG_4MV)
            && !c->skip && varc>50<<8 && vard>10<<8){
             if(h263_mv4_search(s, mx, my, shift) < INT_MAX)
                 mb_type|=CANDIDATE_MB_TYPE_INTER4V;
@@ -976,7 +976,7 @@ void ff_estimate_p_frame_motion(MpegEncContext * s,
             set_p_mv_tables(s, mx, my, 0);
         }else
             set_p_mv_tables(s, mx, my, 1);
-        if((s->flags&CODEC_FLAG_INTERLACED_ME)
+        if ((s->avctx->flags & CODEC_FLAG_INTERLACED_ME)
            && !c->skip){ //FIXME varc/d checks
             if(interlaced_search(s, 0, s->p_field_mv_table, s->p_field_select_table, mx, my, 0) < INT_MAX)
                 mb_type |= CANDIDATE_MB_TYPE_INTER_I;
@@ -989,7 +989,7 @@ void ff_estimate_p_frame_motion(MpegEncContext * s,
         if(c->avctx->me_sub_cmp != c->avctx->mb_cmp && !c->skip)
             dmin= get_mb_score(s, mx, my, 0, 0, 0, 16, 1);
 
-        if((s->flags&CODEC_FLAG_4MV)
+        if ((s->avctx->flags & CODEC_FLAG_4MV)
            && !c->skip && varc>50<<8 && vard>10<<8){
             int dmin4= h263_mv4_search(s, mx, my, shift);
             if(dmin4 < dmin){
@@ -997,7 +997,7 @@ void ff_estimate_p_frame_motion(MpegEncContext * s,
                 dmin=dmin4;
             }
         }
-        if((s->flags&CODEC_FLAG_INTERLACED_ME)
+        if ((s->avctx->flags & CODEC_FLAG_INTERLACED_ME)
            && !c->skip){ //FIXME varc/d checks
             int dmin_i= interlaced_search(s, 0, s->p_field_mv_table, s->p_field_select_table, mx, my, 0);
             if(dmin_i < dmin){
@@ -1525,7 +1525,7 @@ void ff_estimate_b_frame_motion(MpegEncContext * s,
     fbmin= bidir_refine(s, mb_x, mb_y) + penalty_factor;
     ff_dlog(s, "%d %d %d %d\n", dmin, fmin, bmin, fbmin);
 
-    if(s->flags & CODEC_FLAG_INTERLACED_ME){
+    if (s->avctx->flags & CODEC_FLAG_INTERLACED_ME) {
 //FIXME mb type penalty
         c->skip=0;
         c->current_mv_penalty= c->mv_penalty[s->f_code] + MAX_MV;
@@ -1656,7 +1656,7 @@ void ff_fix_long_p_mvs(MpegEncContext * s)
 
     if(c->avctx->me_range && range > c->avctx->me_range) range= c->avctx->me_range;
 
-    if(s->flags&CODEC_FLAG_4MV){
+    if (s->avctx->flags & CODEC_FLAG_4MV) {
         const int wrap= s->b8_stride;
 
         /* clip / convert to intra 8x8 type MVs */
diff --git a/libavcodec/mpeg12dec.c b/libavcodec/mpeg12dec.c
index 6ed151aae4..c6847ec109 100644
--- a/libavcodec/mpeg12dec.c
+++ b/libavcodec/mpeg12dec.c
@@ -823,7 +823,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
 #endif /* FF_API_XVMC */
 
         if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
-            if (s->flags2 & CODEC_FLAG2_FAST) {
+            if (s->avctx->flags2 & CODEC_FLAG2_FAST) {
                 for (i = 0; i < 6; i++)
                     mpeg2_fast_decode_block_intra(s, *s->pblocks[i], i);
             } else {
@@ -1041,7 +1041,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
 #endif /* FF_API_XVMC */
 
             if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
-                if (s->flags2 & CODEC_FLAG2_FAST) {
+                if (s->avctx->flags2 & CODEC_FLAG2_FAST) {
                     for (i = 0; i < 6; i++) {
                         if (cbp & 32)
                             mpeg2_fast_decode_block_non_intra(s, *s->pblocks[i], i);
@@ -1063,7 +1063,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
                     }
                 }
             } else {
-                if (s->flags2 & CODEC_FLAG2_FAST) {
+                if (s->avctx->flags2 & CODEC_FLAG2_FAST) {
                     for (i = 0; i < 6; i++) {
                         if (cbp & 32)
                             mpeg1_fast_decode_block_inter(s, *s->pblocks[i], i);
@@ -1102,8 +1102,6 @@ static av_cold int mpeg_decode_init(AVCodecContext *avctx)
     ff_mpv_decode_defaults(s2);
 
     s->mpeg_enc_ctx.avctx  = avctx;
-    s->mpeg_enc_ctx.flags  = avctx->flags;
-    s->mpeg_enc_ctx.flags2 = avctx->flags2;
 
     /* we need some permutation to store matrices,
      * until the decoder sets the real permutation. */
@@ -1403,7 +1401,7 @@ static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
     s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
 
     s->low_delay = get_bits1(&s->gb);
-    if (s->flags & CODEC_FLAG_LOW_DELAY)
+    if (s->avctx->flags & CODEC_FLAG_LOW_DELAY)
         s->low_delay = 1;
 
     s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
@@ -2134,7 +2132,7 @@ static int mpeg1_decode_sequence(AVCodecContext *avctx,
     s->codec_id             =
     s->avctx->codec_id      = AV_CODEC_ID_MPEG1VIDEO;
     s->out_format           = FMT_MPEG1;
-    if (s->flags & CODEC_FLAG_LOW_DELAY)
+    if (s->avctx->flags & CODEC_FLAG_LOW_DELAY)
         s->low_delay = 1;
 
     if (s->avctx->debug & FF_DEBUG_PICT_INFO)
@@ -2633,7 +2631,7 @@ static int mpeg_decode_frame(AVCodecContext *avctx, void *data,
         return buf_size;
     }
 
-    if (s2->flags & CODEC_FLAG_TRUNCATED) {
+    if (s2->avctx->flags & CODEC_FLAG_TRUNCATED) {
         int next = ff_mpeg1_find_frame_end(&s2->parse_context, buf,
                                            buf_size, NULL);
 
diff --git a/libavcodec/mpeg12enc.c b/libavcodec/mpeg12enc.c
index 5fc5e36b27..29438f3b92 100644
--- a/libavcodec/mpeg12enc.c
+++ b/libavcodec/mpeg12enc.c
@@ -324,7 +324,7 @@ static void mpeg1_encode_sequence_header(MpegEncContext *s)
         put_bits(&s->pb, 1, 1);
         put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
         put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
-        put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
+        put_bits(&s->pb, 1, !!(s->avctx->flags & CODEC_FLAG_CLOSED_GOP));
         put_bits(&s->pb, 1, 0);                     // broken link
     }
 }
diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c
index 50a6ae1cd6..ec03aac8f3 100644
--- a/libavcodec/mpeg4videodec.c
+++ b/libavcodec/mpeg4videodec.c
@@ -2078,7 +2078,7 @@ static int decode_vop_header(Mpeg4DecContext *ctx, GetBitContext *gb)
 
     s->pict_type = get_bits(gb, 2) + AV_PICTURE_TYPE_I;        /* pict type: I = 0 , P = 1 */
     if (s->pict_type == AV_PICTURE_TYPE_B && s->low_delay &&
-        ctx->vol_control_parameters == 0 && !(s->flags & CODEC_FLAG_LOW_DELAY)) {
+        ctx->vol_control_parameters == 0 && !(s->avctx->flags & CODEC_FLAG_LOW_DELAY)) {
         av_log(s->avctx, AV_LOG_ERROR, "low_delay flag set incorrectly, clearing it\n");
         s->low_delay = 0;
     }
@@ -2420,7 +2420,7 @@ int ff_mpeg4_decode_picture_header(Mpeg4DecContext *ctx, GetBitContext *gb)
     }
 
 end:
-    if (s->flags & CODEC_FLAG_LOW_DELAY)
+    if (s->avctx->flags & CODEC_FLAG_LOW_DELAY)
         s->low_delay = 1;
     s->avctx->has_b_frames = !s->low_delay;
 
diff --git a/libavcodec/mpeg4videoenc.c b/libavcodec/mpeg4videoenc.c
index e9bc85f878..ab279dd849 100644
--- a/libavcodec/mpeg4videoenc.c
+++ b/libavcodec/mpeg4videoenc.c
@@ -430,7 +430,7 @@ static inline void mpeg4_encode_blocks(MpegEncContext *s, int16_t block[6][64],
     int i;
 
     if (scan_table) {
-        if (s->flags2 & CODEC_FLAG2_NO_OUTPUT) {
+        if (s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT) {
             for (i = 0; i < 6; i++)
                 skip_put_bits(&s->pb,
                               mpeg4_get_block_length(s, block[i], i,
@@ -442,7 +442,7 @@ static inline void mpeg4_encode_blocks(MpegEncContext *s, int16_t block[6][64],
                                    intra_dc[i], scan_table[i], dc_pb, ac_pb);
         }
     } else {
-        if (s->flags2 & CODEC_FLAG2_NO_OUTPUT) {
+        if (s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT) {
             for (i = 0; i < 6; i++)
                 skip_put_bits(&s->pb,
                               mpeg4_get_block_length(s, block[i], i, 0,
@@ -507,7 +507,7 @@ void ff_mpeg4_encode_mb(MpegEncContext *s, int16_t block[6][64],
     PutBitContext *const pb2    = s->data_partitioning ? &s->pb2 : &s->pb;
     PutBitContext *const tex_pb = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B ? &s->tex_pb : &s->pb;
     PutBitContext *const dc_pb  = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_I ? &s->pb2 : &s->pb;
-    const int interleaved_stats = (s->flags & CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0;
+    const int interleaved_stats = (s->avctx->flags & CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0;
 
     if (!s->mb_intra) {
         int i, cbp;
@@ -822,7 +822,7 @@ void ff_mpeg4_encode_mb(MpegEncContext *s, int16_t block[6][64],
         for (i = 0; i < 6; i++)
             dc_diff[i] = ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1);
 
-        if (s->flags & CODEC_FLAG_AC_PRED) {
+        if (s->avctx->flags & CODEC_FLAG_AC_PRED) {
             s->ac_pred = decide_ac_pred(s, block, dir, scan_table, zigzag_last_index);
         } else {
             for (i = 0; i < 6; i++)
@@ -923,7 +923,7 @@ static void mpeg4_encode_gop_header(MpegEncContext *s)
     put_bits(&s->pb, 1, 1);
     put_bits(&s->pb, 6, seconds);
 
-    put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
+    put_bits(&s->pb, 1, !!(s->avctx->flags & CODEC_FLAG_CLOSED_GOP));
     put_bits(&s->pb, 1, 0);  // broken link == NO
 
     s->last_time_base = time / s->avctx->time_base.den;
@@ -1069,7 +1069,7 @@ static void mpeg4_encode_vol_header(MpegEncContext *s,
     ff_mpeg4_stuffing(&s->pb);
 
     /* user data */
-    if (!(s->flags & CODEC_FLAG_BITEXACT)) {
+    if (!(s->avctx->flags & CODEC_FLAG_BITEXACT)) {
         put_bits(&s->pb, 16, 0);
         put_bits(&s->pb, 16, 0x1B2);    /* user_data */
         avpriv_put_string(&s->pb, LIBAVCODEC_IDENT, 0);
@@ -1083,7 +1083,7 @@ void ff_mpeg4_encode_picture_header(MpegEncContext *s, int picture_number)
     int time_div, time_mod;
 
     if (s->pict_type == AV_PICTURE_TYPE_I) {
-        if (!(s->flags & CODEC_FLAG_GLOBAL_HEADER)) {
+        if (!(s->avctx->flags & CODEC_FLAG_GLOBAL_HEADER)) {
             if (s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT)  // HACK, the reference sw is buggy
                 mpeg4_encode_visual_object_header(s);
             if (s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || picture_number == 0)  // HACK, the reference sw is buggy
@@ -1312,7 +1312,7 @@ static av_cold int encode_init(AVCodecContext *avctx)
     s->y_dc_scale_table         = ff_mpeg4_y_dc_scale_table;
     s->c_dc_scale_table         = ff_mpeg4_c_dc_scale_table;
 
-    if (s->flags & CODEC_FLAG_GLOBAL_HEADER) {
+    if (s->avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
         s->avctx->extradata = av_malloc(1024);
         init_put_bits(&s->pb, s->avctx->extradata, 1024);
 
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index 9db952255d..bce307c72c 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -389,7 +389,7 @@ static av_cold int dct_init(MpegEncContext *s)
     s->dct_unquantize_mpeg1_intra = dct_unquantize_mpeg1_intra_c;
     s->dct_unquantize_mpeg1_inter = dct_unquantize_mpeg1_inter_c;
     s->dct_unquantize_mpeg2_intra = dct_unquantize_mpeg2_intra_c;
-    if (s->flags & CODEC_FLAG_BITEXACT)
+    if (s->avctx->flags & CODEC_FLAG_BITEXACT)
         s->dct_unquantize_mpeg2_intra = dct_unquantize_mpeg2_intra_bitexact;
     s->dct_unquantize_mpeg2_inter = dct_unquantize_mpeg2_inter_c;
 
@@ -1174,7 +1174,7 @@ static int init_context_frame(MpegEncContext *s)
     }
 
     if (s->codec_id == AV_CODEC_ID_MPEG4 ||
-        (s->flags & CODEC_FLAG_INTERLACED_ME)) {
+        (s->avctx->flags & CODEC_FLAG_INTERLACED_ME)) {
         /* interlaced direct mode decoding tables */
         for (i = 0; i < 2; i++) {
             int j, k;
@@ -1277,9 +1277,6 @@ av_cold int ff_mpv_common_init(MpegEncContext *s)
 
     dct_init(s);
 
-    s->flags  = s->avctx->flags;
-    s->flags2 = s->avctx->flags2;
-
     /* set chroma shifts */
     av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt,
                                      &s->chroma_x_shift,
@@ -1744,7 +1741,7 @@ int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx)
     s->current_picture_ptr->field_picture      =  s->picture_structure != PICT_FRAME;
 
     s->current_picture_ptr->f->pict_type = s->pict_type;
-    // if (s->flags && CODEC_FLAG_QSCALE)
+    // if (s->avctx->flags && CODEC_FLAG_QSCALE)
     //     s->current_picture_ptr->quality = s->new_picture_ptr->quality;
     s->current_picture_ptr->f->key_frame = s->pict_type == AV_PICTURE_TYPE_I;
 
@@ -2158,7 +2155,9 @@ FF_ENABLE_DEPRECATION_WARNINGS
     else if (!is_mpeg12 && (s->h263_pred || s->h263_aic))
         s->mbintra_table[mb_xy]=1;
 
-    if ((s->flags&CODEC_FLAG_PSNR) || !(s->encoding && (s->intra_only || s->pict_type==AV_PICTURE_TYPE_B) && s->avctx->mb_decision != FF_MB_DECISION_RD)) { //FIXME precalc
+    if ((s->avctx->flags & CODEC_FLAG_PSNR) ||
+        !(s->encoding && (s->intra_only || s->pict_type == AV_PICTURE_TYPE_B) &&
+          s->avctx->mb_decision != FF_MB_DECISION_RD)) { // FIXME precalc
         uint8_t *dest_y, *dest_cb, *dest_cr;
         int dct_linesize, dct_offset;
         op_pixels_func (*op_pix)[4];
@@ -2247,7 +2246,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
                 add_dequant_dct(s, block[2], 2, dest_y + dct_offset             , dct_linesize, s->qscale);
                 add_dequant_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize, s->qscale);
 
-                if(!CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
+                if (!CONFIG_GRAY || !(s->avctx->flags & CODEC_FLAG_GRAY)) {
                     if (s->chroma_y_shift){
                         add_dequant_dct(s, block[4], 4, dest_cb, uvlinesize, s->chroma_qscale);
                         add_dequant_dct(s, block[5], 5, dest_cr, uvlinesize, s->chroma_qscale);
@@ -2266,7 +2265,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
                 add_dct(s, block[2], 2, dest_y + dct_offset             , dct_linesize);
                 add_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize);
 
-                if(!CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
+                if (!CONFIG_GRAY || !(s->avctx->flags & CODEC_FLAG_GRAY)) {
                     if(s->chroma_y_shift){//Chroma420
                         add_dct(s, block[4], 4, dest_cb, uvlinesize);
                         add_dct(s, block[5], 5, dest_cr, uvlinesize);
@@ -2299,7 +2298,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
                 put_dct(s, block[2], 2, dest_y + dct_offset             , dct_linesize, s->qscale);
                 put_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize, s->qscale);
 
-                if(!CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
+                if (!CONFIG_GRAY || !(s->avctx->flags & CODEC_FLAG_GRAY)) {
                     if(s->chroma_y_shift){
                         put_dct(s, block[4], 4, dest_cb, uvlinesize, s->chroma_qscale);
                         put_dct(s, block[5], 5, dest_cr, uvlinesize, s->chroma_qscale);
@@ -2318,7 +2317,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
                 s->idsp.idct_put(dest_y + dct_offset,              dct_linesize, block[2]);
                 s->idsp.idct_put(dest_y + dct_offset + block_size, dct_linesize, block[3]);
 
-                if(!CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
+                if (!CONFIG_GRAY || !(s->avctx->flags & CODEC_FLAG_GRAY)) {
                     if(s->chroma_y_shift){
                         s->idsp.idct_put(dest_cb, uvlinesize, block[4]);
                         s->idsp.idct_put(dest_cr, uvlinesize, block[5]);
diff --git a/libavcodec/mpegvideo.h b/libavcodec/mpegvideo.h
index a412ec7a0c..35c75e4955 100644
--- a/libavcodec/mpegvideo.h
+++ b/libavcodec/mpegvideo.h
@@ -237,8 +237,6 @@ typedef struct MpegEncContext {
     enum AVCodecID codec_id;     /* see AV_CODEC_ID_xxx */
     int fixed_qscale; ///< fixed qscale if non zero
     int encoding;     ///< true if we are encoding (vs decoding)
-    int flags;        ///< AVCodecContext.flags (HQ, MV4, ...)
-    int flags2;       ///< AVCodecContext.flags2
     int max_b_frames; ///< max number of b-frames for encoding
     int luma_elim_threshold;
     int chroma_elim_threshold;
diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c
index 428ff722a9..a46b685535 100644
--- a/libavcodec/mpegvideo_enc.c
+++ b/libavcodec/mpegvideo_enc.c
@@ -300,8 +300,6 @@ av_cold int ff_mpv_encode_init(AVCodecContext *avctx)
     }
     s->gop_size     = avctx->gop_size;
     s->avctx        = avctx;
-    s->flags        = avctx->flags;
-    s->flags2       = avctx->flags2;
     if (avctx->max_b_frames > MAX_B_FRAMES) {
         av_log(avctx, AV_LOG_ERROR, "Too many B-frames requested, maximum "
                "is %d.\n", MAX_B_FRAMES);
@@ -343,7 +341,7 @@ av_cold int ff_mpv_encode_init(AVCodecContext *avctx)
                          (s->mpv_flags & FF_MPV_FLAG_QP_RD)) &&
                         !s->fixed_qscale;
 
-    s->loop_filter      = !!(s->flags & CODEC_FLAG_LOOP_FILTER);
+    s->loop_filter = !!(s->avctx->flags & CODEC_FLAG_LOOP_FILTER);
 
     if (avctx->rc_max_rate && !avctx->rc_buffer_size) {
         av_log(avctx, AV_LOG_ERROR,
@@ -400,7 +398,7 @@ av_cold int ff_mpv_encode_init(AVCodecContext *avctx)
                "specified vbv buffer is too large for the given bitrate!\n");
     }
 
-    if ((s->flags & CODEC_FLAG_4MV)  && s->codec_id != AV_CODEC_ID_MPEG4 &&
+    if ((s->avctx->flags & CODEC_FLAG_4MV) && s->codec_id != AV_CODEC_ID_MPEG4 &&
         s->codec_id != AV_CODEC_ID_H263 && s->codec_id != AV_CODEC_ID_H263P &&
         s->codec_id != AV_CODEC_ID_FLV1) {
         av_log(avctx, AV_LOG_ERROR, "4MV not supported by codec\n");
@@ -437,7 +435,7 @@ av_cold int ff_mpv_encode_init(AVCodecContext *avctx)
         return -1;
     }
 
-    if ((s->flags & (CODEC_FLAG_INTERLACED_DCT | CODEC_FLAG_INTERLACED_ME)) &&
+    if ((s->avctx->flags & (CODEC_FLAG_INTERLACED_DCT | CODEC_FLAG_INTERLACED_ME)) &&
         s->codec_id != AV_CODEC_ID_MPEG4 && s->codec_id != AV_CODEC_ID_MPEG2VIDEO) {
         av_log(avctx, AV_LOG_ERROR, "interlacing not supported by codec\n");
         return -1;
@@ -462,14 +460,14 @@ av_cold int ff_mpv_encode_init(AVCodecContext *avctx)
     }
 
     if (s->avctx->scenechange_threshold < 1000000000 &&
-        (s->flags & CODEC_FLAG_CLOSED_GOP)) {
+        (s->avctx->flags & CODEC_FLAG_CLOSED_GOP)) {
         av_log(avctx, AV_LOG_ERROR,
                "closed gop with scene change detection are not supported yet, "
                "set threshold to 1000000000\n");
         return -1;
     }
 
-    if (s->flags & CODEC_FLAG_LOW_DELAY) {
+    if (s->avctx->flags & CODEC_FLAG_LOW_DELAY) {
         if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO) {
             av_log(avctx, AV_LOG_ERROR,
                   "low delay forcing is only available for mpeg2\n");
@@ -559,12 +557,12 @@ av_cold int ff_mpv_encode_init(AVCodecContext *avctx)
     switch (avctx->codec->id) {
     case AV_CODEC_ID_MPEG1VIDEO:
         s->out_format = FMT_MPEG1;
-        s->low_delay  = !!(s->flags & CODEC_FLAG_LOW_DELAY);
+        s->low_delay  = !!(s->avctx->flags & CODEC_FLAG_LOW_DELAY);
         avctx->delay  = s->low_delay ? 0 : (s->max_b_frames + 1);
         break;
     case AV_CODEC_ID_MPEG2VIDEO:
         s->out_format = FMT_MPEG1;
-        s->low_delay  = !!(s->flags & CODEC_FLAG_LOW_DELAY);
+        s->low_delay  = !!(s->avctx->flags & CODEC_FLAG_LOW_DELAY);
         avctx->delay  = s->low_delay ? 0 : (s->max_b_frames + 1);
         s->rtp_mode   = 1;
         break;
@@ -1273,7 +1271,7 @@ static int select_input_picture(MpegEncContext *s)
                 }
             }
 
-            if (s->flags & CODEC_FLAG_PASS2) {
+            if (s->avctx->flags & CODEC_FLAG_PASS2) {
                 for (i = 0; i < s->max_b_frames + 1; i++) {
                     int pict_num = s->input_picture[0]->f->display_picture_number + i;
 
@@ -1342,13 +1340,13 @@ static int select_input_picture(MpegEncContext *s)
                     s->gop_size > s->picture_in_gop_number) {
                     b_frames = s->gop_size - s->picture_in_gop_number - 1;
                 } else {
-                    if (s->flags & CODEC_FLAG_CLOSED_GOP)
+                    if (s->avctx->flags & CODEC_FLAG_CLOSED_GOP)
                         b_frames = 0;
                     s->input_picture[b_frames]->f->pict_type = AV_PICTURE_TYPE_I;
                 }
             }
 
-            if ((s->flags & CODEC_FLAG_CLOSED_GOP) && b_frames &&
+            if ((s->avctx->flags & CODEC_FLAG_CLOSED_GOP) && b_frames &&
                 s->input_picture[b_frames]->f->pict_type == AV_PICTURE_TYPE_I)
                 b_frames--;
 
@@ -1659,7 +1657,7 @@ vbv_retry:
             assert(s->avctx->rc_max_rate);
         }
 
-        if (s->flags & CODEC_FLAG_PASS1)
+        if (s->avctx->flags & CODEC_FLAG_PASS1)
             ff_write_pass1_stats(s);
 
         for (i = 0; i < 4; i++) {
@@ -1667,7 +1665,7 @@ vbv_retry:
             avctx->error[i] += s->current_picture_ptr->f->error[i];
         }
 
-        if (s->flags & CODEC_FLAG_PASS1)
+        if (s->avctx->flags & CODEC_FLAG_PASS1)
             assert(avctx->header_bits + avctx->mv_bits + avctx->misc_bits +
                    avctx->i_tex_bits + avctx->p_tex_bits ==
                        put_bits_count(&s->pb));
@@ -1955,7 +1953,7 @@ static av_always_inline void encode_mb_internal(MpegEncContext *s,
     }
 
     if (s->mb_intra) {
-        if (s->flags & CODEC_FLAG_INTERLACED_DCT) {
+        if (s->avctx->flags & CODEC_FLAG_INTERLACED_DCT) {
             int progressive_score, interlaced_score;
 
             s->interlaced_dct = 0;
@@ -1984,7 +1982,7 @@ static av_always_inline void encode_mb_internal(MpegEncContext *s,
         s->pdsp.get_pixels(s->block[2], ptr_y + dct_offset,     wrap_y);
         s->pdsp.get_pixels(s->block[3], ptr_y + dct_offset + 8, wrap_y);
 
-        if (s->flags & CODEC_FLAG_GRAY) {
+        if (s->avctx->flags & CODEC_FLAG_GRAY) {
             skip_dct[4] = 1;
             skip_dct[5] = 1;
         } else {
@@ -2027,7 +2025,7 @@ static av_always_inline void encode_mb_internal(MpegEncContext *s,
                           op_pix, op_qpix);
         }
 
-        if (s->flags & CODEC_FLAG_INTERLACED_DCT) {
+        if (s->avctx->flags & CODEC_FLAG_INTERLACED_DCT) {
             int progressive_score, interlaced_score;
 
             s->interlaced_dct = 0;
@@ -2064,7 +2062,7 @@ static av_always_inline void encode_mb_internal(MpegEncContext *s,
         s->pdsp.diff_pixels(s->block[3], ptr_y + dct_offset + 8,
                             dest_y + dct_offset + 8, wrap_y);
 
-        if (s->flags & CODEC_FLAG_GRAY) {
+        if (s->avctx->flags & CODEC_FLAG_GRAY) {
             skip_dct[4] = 1;
             skip_dct[5] = 1;
         } else {
@@ -2174,7 +2172,7 @@ static av_always_inline void encode_mb_internal(MpegEncContext *s,
         }
     }
 
-    if ((s->flags & CODEC_FLAG_GRAY) && s->mb_intra) {
+    if ((s->avctx->flags & CODEC_FLAG_GRAY) && s->mb_intra) {
         s->block_last_index[4] =
         s->block_last_index[5] = 0;
         s->block[4][0] =
@@ -2486,7 +2484,7 @@ static void write_slice_end(MpegEncContext *s){
     avpriv_align_put_bits(&s->pb);
     flush_put_bits(&s->pb);
 
-    if((s->flags&CODEC_FLAG_PASS1) && !s->partitioned_frame)
+    if ((s->avctx->flags & CODEC_FLAG_PASS1) && !s->partitioned_frame)
         s->misc_bits+= get_bits_diff(s);
 }
 
@@ -2697,7 +2695,7 @@ static int encode_thread(AVCodecContext *c, void *arg){
                     break;
                     }
 
-                    if(s->flags&CODEC_FLAG_PASS1){
+                    if (s->avctx->flags & CODEC_FLAG_PASS1) {
                         int bits= put_bits_count(&s->pb);
                         s->misc_bits+= bits - s->last_bits;
                         s->last_bits= bits;
@@ -3116,7 +3114,7 @@ static int encode_thread(AVCodecContext *c, void *arg){
                 s->p_mv_table[xy][1]=0;
             }
 
-            if(s->flags&CODEC_FLAG_PSNR){
+            if (s->avctx->flags & CODEC_FLAG_PSNR) {
                 int w= 16;
                 int h= 16;
 
@@ -3281,11 +3279,11 @@ static int encode_picture(MpegEncContext *s, int picture_number)
             s->no_rounding ^= 1;
     }
 
-    if(s->flags & CODEC_FLAG_PASS2){
+    if (s->avctx->flags & CODEC_FLAG_PASS2) {
         if (estimate_qp(s,1) < 0)
             return -1;
         ff_get_2pass_fcode(s);
-    }else if(!(s->flags & CODEC_FLAG_QSCALE)){
+    } else if (!(s->avctx->flags & CODEC_FLAG_QSCALE)) {
         if(s->pict_type==AV_PICTURE_TYPE_B)
             s->lambda= s->last_lambda_for[s->pict_type];
         else
@@ -3343,7 +3341,7 @@ static int encode_picture(MpegEncContext *s, int picture_number)
         if(s->pict_type==AV_PICTURE_TYPE_P || s->pict_type==AV_PICTURE_TYPE_S) {
             s->f_code= ff_get_best_fcode(s, s->p_mv_table, CANDIDATE_MB_TYPE_INTER);
 
-            if(s->flags & CODEC_FLAG_INTERLACED_ME){
+            if (s->avctx->flags & CODEC_FLAG_INTERLACED_ME) {
                 int a,b;
                 a= ff_get_best_fcode(s, s->p_field_mv_table[0][0], CANDIDATE_MB_TYPE_INTER_I); //FIXME field_select
                 b= ff_get_best_fcode(s, s->p_field_mv_table[1][1], CANDIDATE_MB_TYPE_INTER_I);
@@ -3352,7 +3350,7 @@ static int encode_picture(MpegEncContext *s, int picture_number)
 
             ff_fix_long_p_mvs(s);
             ff_fix_long_mvs(s, NULL, 0, s->p_mv_table, s->f_code, CANDIDATE_MB_TYPE_INTER, 0);
-            if(s->flags & CODEC_FLAG_INTERLACED_ME){
+            if (s->avctx->flags & CODEC_FLAG_INTERLACED_ME) {
                 int j;
                 for(i=0; i<2; i++){
                     for(j=0; j<2; j++)
@@ -3377,7 +3375,7 @@ static int encode_picture(MpegEncContext *s, int picture_number)
             ff_fix_long_mvs(s, NULL, 0, s->b_back_mv_table, s->b_code, CANDIDATE_MB_TYPE_BACKWARD, 1);
             ff_fix_long_mvs(s, NULL, 0, s->b_bidir_forw_mv_table, s->f_code, CANDIDATE_MB_TYPE_BIDIR, 1);
             ff_fix_long_mvs(s, NULL, 0, s->b_bidir_back_mv_table, s->b_code, CANDIDATE_MB_TYPE_BIDIR, 1);
-            if(s->flags & CODEC_FLAG_INTERLACED_ME){
+            if (s->avctx->flags & CODEC_FLAG_INTERLACED_ME) {
                 int dir, j;
                 for(dir=0; dir<2; dir++){
                     for(i=0; i<2; i++){
@@ -3396,7 +3394,9 @@ static int encode_picture(MpegEncContext *s, int picture_number)
     if (estimate_qp(s, 0) < 0)
         return -1;
 
-    if(s->qscale < 3 && s->max_qcoeff<=128 && s->pict_type==AV_PICTURE_TYPE_I && !(s->flags & CODEC_FLAG_QSCALE))
+    if (s->qscale < 3 && s->max_qcoeff <= 128 &&
+        s->pict_type == AV_PICTURE_TYPE_I &&
+        !(s->avctx->flags & CODEC_FLAG_QSCALE))
         s->qscale= 3; //reduce clipping problems
 
     if (s->out_format == FMT_MJPEG) {
diff --git a/libavcodec/mpegvideo_motion.c b/libavcodec/mpegvideo_motion.c
index f33db341de..95414d1230 100644
--- a/libavcodec/mpegvideo_motion.c
+++ b/libavcodec/mpegvideo_motion.c
@@ -86,7 +86,7 @@ static void gmc1_motion(MpegEncContext *s,
         }
     }
 
-    if (CONFIG_GRAY && s->flags & CODEC_FLAG_GRAY)
+    if (CONFIG_GRAY && s->avctx->flags & CODEC_FLAG_GRAY)
         return;
 
     motion_x   = s->sprite_offset[1][0];
@@ -163,7 +163,7 @@ static void gmc_motion(MpegEncContext *s,
                 a + 1, (1 << (2 * a + 1)) - s->no_rounding,
                 s->h_edge_pos, s->v_edge_pos);
 
-    if (CONFIG_GRAY && s->flags & CODEC_FLAG_GRAY)
+    if (CONFIG_GRAY && s->avctx->flags & CODEC_FLAG_GRAY)
         return;
 
     ox = s->sprite_offset[1][0] + s->sprite_delta[0][0] * s->mb_x * 8 +
@@ -323,7 +323,7 @@ void mpeg_motion_internal(MpegEncContext *s,
                                  src_x, src_y << field_based,
                                  s->h_edge_pos, s->v_edge_pos);
         ptr_y = s->edge_emu_buffer;
-        if (!CONFIG_GRAY || !(s->flags & CODEC_FLAG_GRAY)) {
+        if (!CONFIG_GRAY || !(s->avctx->flags & CODEC_FLAG_GRAY)) {
             uint8_t *uvbuf = s->edge_emu_buffer + 18 * s->linesize;
             s->vdsp.emulated_edge_mc(uvbuf, ptr_cb,
                                      s->uvlinesize, s->uvlinesize,
@@ -356,7 +356,7 @@ void mpeg_motion_internal(MpegEncContext *s,
 
     pix_op[0][dxy](dest_y, ptr_y, linesize, h);
 
-    if (!CONFIG_GRAY || !(s->flags & CODEC_FLAG_GRAY)) {
+    if (!CONFIG_GRAY || !(s->avctx->flags & CODEC_FLAG_GRAY)) {
         pix_op[s->chroma_x_shift][uvdxy]
             (dest_cb, ptr_cb, uvlinesize, h >> s->chroma_y_shift);
         pix_op[s->chroma_x_shift][uvdxy]
@@ -544,7 +544,7 @@ static inline void qpel_motion(MpegEncContext *s,
                                  src_x, src_y << field_based,
                                  s->h_edge_pos, s->v_edge_pos);
         ptr_y = s->edge_emu_buffer;
-        if (!CONFIG_GRAY || !(s->flags & CODEC_FLAG_GRAY)) {
+        if (!CONFIG_GRAY || !(s->avctx->flags & CODEC_FLAG_GRAY)) {
             uint8_t *uvbuf = s->edge_emu_buffer + 18 * s->linesize;
             s->vdsp.emulated_edge_mc(uvbuf, ptr_cb,
                                      s->uvlinesize, s->uvlinesize,
@@ -580,7 +580,7 @@ static inline void qpel_motion(MpegEncContext *s,
         qpix_op[1][dxy](dest_y, ptr_y, linesize);
         qpix_op[1][dxy](dest_y + 8, ptr_y + 8, linesize);
     }
-    if (!CONFIG_GRAY || !(s->flags & CODEC_FLAG_GRAY)) {
+    if (!CONFIG_GRAY || !(s->avctx->flags & CODEC_FLAG_GRAY)) {
         pix_op[1][uvdxy](dest_cr, ptr_cr, uvlinesize, h >> 1);
         pix_op[1][uvdxy](dest_cb, ptr_cb, uvlinesize, h >> 1);
     }
@@ -736,7 +736,7 @@ static inline void apply_obmc(MpegEncContext *s,
         mx += mv[0][0];
         my += mv[0][1];
     }
-    if (!CONFIG_GRAY || !(s->flags & CODEC_FLAG_GRAY))
+    if (!CONFIG_GRAY || !(s->avctx->flags & CODEC_FLAG_GRAY))
         chroma_4mv_motion(s, dest_cb, dest_cr,
                           ref_picture, pix_op[1],
                           mx, my);
@@ -809,7 +809,7 @@ static inline void apply_8x8(MpegEncContext *s,
         }
     }
 
-    if (!CONFIG_GRAY || !(s->flags & CODEC_FLAG_GRAY))
+    if (!CONFIG_GRAY || !(s->avctx->flags & CODEC_FLAG_GRAY))
         chroma_4mv_motion(s, dest_cb, dest_cr,
                           ref_picture, pix_op[1], mx, my);
 }
diff --git a/libavcodec/mpegvideo_xvmc.c b/libavcodec/mpegvideo_xvmc.c
index fb2dd80140..4628360a02 100644
--- a/libavcodec/mpegvideo_xvmc.c
+++ b/libavcodec/mpegvideo_xvmc.c
@@ -285,7 +285,7 @@ void ff_xvmc_decode_mb(MpegEncContext *s)
             cbp++;
     }
 
-    if (s->flags & CODEC_FLAG_GRAY) {
+    if (s->avctx->flags & CODEC_FLAG_GRAY) {
         if (s->mb_intra) {                                   // intra frames are always full chroma blocks
             for (i = 4; i < blocks_per_mb; i++) {
                 memset(s->pblocks[i], 0, sizeof(*s->pblocks[i]));  // so we need to clear them
diff --git a/libavcodec/ratecontrol.c b/libavcodec/ratecontrol.c
index aae75707f4..620c854ad4 100644
--- a/libavcodec/ratecontrol.c
+++ b/libavcodec/ratecontrol.c
@@ -150,7 +150,7 @@ av_cold int ff_rate_control_init(MpegEncContext *s)
     }
     rcc->buffer_index = s->avctx->rc_initial_buffer_occupancy;
 
-    if (s->flags & CODEC_FLAG_PASS2) {
+    if (s->avctx->flags & CODEC_FLAG_PASS2) {
         int i;
         char *p;
 
@@ -214,7 +214,7 @@ av_cold int ff_rate_control_init(MpegEncContext *s)
             return -1;
 
         // FIXME maybe move to end
-        if ((s->flags & CODEC_FLAG_PASS2) && s->avctx->rc_strategy == FF_RC_STRATEGY_XVID) {
+        if ((s->avctx->flags & CODEC_FLAG_PASS2) && s->avctx->rc_strategy == FF_RC_STRATEGY_XVID) {
 #if CONFIG_LIBXVID
             return ff_xvid_rate_control_init(s);
 #else
@@ -225,7 +225,7 @@ av_cold int ff_rate_control_init(MpegEncContext *s)
         }
     }
 
-    if (!(s->flags & CODEC_FLAG_PASS2)) {
+    if (!(s->avctx->flags & CODEC_FLAG_PASS2)) {
         rcc->short_term_qsum   = 0.001;
         rcc->short_term_qcount = 0.001;
 
@@ -294,7 +294,7 @@ av_cold void ff_rate_control_uninit(MpegEncContext *s)
     av_freep(&rcc->entry);
 
 #if CONFIG_LIBXVID
-    if ((s->flags & CODEC_FLAG_PASS2) && s->avctx->rc_strategy == FF_RC_STRATEGY_XVID)
+    if ((s->avctx->flags & CODEC_FLAG_PASS2) && s->avctx->rc_strategy == FF_RC_STRATEGY_XVID)
         ff_xvid_rate_control_uninit(s);
 #endif
 }
@@ -744,7 +744,7 @@ float ff_rate_estimate_qscale(MpegEncContext *s, int dry_run)
     emms_c();
 
 #if CONFIG_LIBXVID
-    if ((s->flags & CODEC_FLAG_PASS2) &&
+    if ((s->avctx->flags & CODEC_FLAG_PASS2) &&
         s->avctx->rc_strategy == FF_RC_STRATEGY_XVID)
         return ff_xvid_rate_estimate_qscale(s, dry_run);
 #endif
@@ -761,7 +761,7 @@ float ff_rate_estimate_qscale(MpegEncContext *s, int dry_run)
                          sqrt(last_var), s->frame_bits);
     }
 
-    if (s->flags & CODEC_FLAG_PASS2) {
+    if (s->avctx->flags & CODEC_FLAG_PASS2) {
         assert(picture_number >= 0);
         assert(picture_number < rcc->num_entries);
         rce         = &rcc->entry[picture_number];
@@ -792,7 +792,7 @@ float ff_rate_estimate_qscale(MpegEncContext *s, int dry_run)
     var = pict_type == AV_PICTURE_TYPE_I ? pic->mb_var_sum : pic->mc_mb_var_sum;
 
     short_term_q = 0; /* avoid warning */
-    if (s->flags & CODEC_FLAG_PASS2) {
+    if (s->avctx->flags & CODEC_FLAG_PASS2) {
         if (pict_type != AV_PICTURE_TYPE_I)
             assert(pict_type == rce->new_pict_type);
 
diff --git a/libavcodec/svq1enc.c b/libavcodec/svq1enc.c
index f49f487f00..8677503b4f 100644
--- a/libavcodec/svq1enc.c
+++ b/libavcodec/svq1enc.c
@@ -275,7 +275,6 @@ static int svq1_encode_plane(SVQ1EncContext *s, int plane,
         s->m.pict_type                     = f->pict_type;
         s->m.me_method                     = s->avctx->me_method;
         s->m.me.scene_change_score         = 0;
-        s->m.flags                         = s->avctx->flags;
         // s->m.out_format                    = FMT_H263;
         // s->m.unrestricted_mv               = 1;
         s->m.lambda                        = f->quality;
diff --git a/libavcodec/vc1_block.c b/libavcodec/vc1_block.c
index 38de670f46..91c926355d 100644
--- a/libavcodec/vc1_block.c
+++ b/libavcodec/vc1_block.c
@@ -1416,7 +1416,7 @@ static int vc1_decode_p_mb(VC1Context *v)
 
                     vc1_decode_intra_block(v, s->block[i], i, val, mquant,
                                            (i & 4) ? v->codingset2 : v->codingset);
-                    if ((i>3) && (s->flags & CODEC_FLAG_GRAY))
+                    if ((i > 3) && (s->avctx->flags & CODEC_FLAG_GRAY))
                         continue;
                     v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
                     if (v->rangeredfrm)
@@ -1437,7 +1437,7 @@ static int vc1_decode_p_mb(VC1Context *v)
                 } else if (val) {
                     pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block,
                                              s->dest[dst_idx] + off, (i & 4) ? s->uvlinesize : s->linesize,
-                                             (i & 4) && (s->flags & CODEC_FLAG_GRAY), &block_tt);
+                                             (i & 4) && (s->avctx->flags & CODEC_FLAG_GRAY), &block_tt);
                     block_cbp |= pat << (i << 2);
                     if (!v->ttmbf && ttmb < 8)
                         ttmb = -1;
@@ -1527,7 +1527,7 @@ static int vc1_decode_p_mb(VC1Context *v)
 
                     vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant,
                                            (i & 4) ? v->codingset2 : v->codingset);
-                    if ((i>3) && (s->flags & CODEC_FLAG_GRAY))
+                    if ((i > 3) && (s->avctx->flags & CODEC_FLAG_GRAY))
                         continue;
                     v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
                     if (v->rangeredfrm)
@@ -1549,7 +1549,7 @@ static int vc1_decode_p_mb(VC1Context *v)
                     pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
                                              first_block, s->dest[dst_idx] + off,
                                              (i & 4) ? s->uvlinesize : s->linesize,
-                                             (i & 4) && (s->flags & CODEC_FLAG_GRAY),
+                                             (i & 4) && (s->avctx->flags & CODEC_FLAG_GRAY),
                                              &block_tt);
                     block_cbp |= pat << (i << 2);
                     if (!v->ttmbf && ttmb < 8)
@@ -1675,7 +1675,8 @@ static int vc1_decode_p_mb_intfr(VC1Context *v)
 
                 vc1_decode_intra_block(v, s->block[i], i, val, mquant,
                                        (i & 4) ? v->codingset2 : v->codingset);
-                if ((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
+                if ((i > 3) && (s->avctx->flags & CODEC_FLAG_GRAY))
+                    continue;
                 v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
                 if (i < 4) {
                     stride_y = s->linesize << fieldtx;
@@ -1766,7 +1767,7 @@ static int vc1_decode_p_mb_intfr(VC1Context *v)
                     pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
                                              first_block, s->dest[dst_idx] + off,
                                              (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
-                                             (i & 4) && (s->flags & CODEC_FLAG_GRAY), &block_tt);
+                                             (i & 4) && (s->avctx->flags & CODEC_FLAG_GRAY), &block_tt);
                     block_cbp |= pat << (i << 2);
                     if (!v->ttmbf && ttmb < 8)
                         ttmb = -1;
@@ -1845,7 +1846,7 @@ static int vc1_decode_p_mb_intfi(VC1Context *v)
 
             vc1_decode_intra_block(v, s->block[i], i, val, mquant,
                                    (i & 4) ? v->codingset2 : v->codingset);
-            if ((i>3) && (s->flags & CODEC_FLAG_GRAY))
+            if ((i > 3) && (s->avctx->flags & CODEC_FLAG_GRAY))
                 continue;
             v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
             off  = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
@@ -1902,7 +1903,7 @@ static int vc1_decode_p_mb_intfi(VC1Context *v)
                 pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
                                          first_block, s->dest[dst_idx] + off,
                                          (i & 4) ? s->uvlinesize : s->linesize,
-                                         (i & 4) && (s->flags & CODEC_FLAG_GRAY),
+                                         (i & 4) && (s->avctx->flags & CODEC_FLAG_GRAY),
                                          &block_tt);
                 block_cbp |= pat << (i << 2);
                 if (!v->ttmbf && ttmb < 8) ttmb = -1;
@@ -2048,7 +2049,7 @@ static void vc1_decode_b_mb(VC1Context *v)
 
             vc1_decode_intra_block(v, s->block[i], i, val, mquant,
                                    (i & 4) ? v->codingset2 : v->codingset);
-            if ((i>3) && (s->flags & CODEC_FLAG_GRAY))
+            if ((i > 3) && (s->avctx->flags & CODEC_FLAG_GRAY))
                 continue;
             v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
             if (v->rangeredfrm)
@@ -2062,7 +2063,7 @@ static void vc1_decode_b_mb(VC1Context *v)
             vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
                                first_block, s->dest[dst_idx] + off,
                                (i & 4) ? s->uvlinesize : s->linesize,
-                               (i & 4) && (s->flags & CODEC_FLAG_GRAY), NULL);
+                               (i & 4) && (s->avctx->flags & CODEC_FLAG_GRAY), NULL);
             if (!v->ttmbf && ttmb < 8)
                 ttmb = -1;
             first_block = 0;
@@ -2123,7 +2124,7 @@ static void vc1_decode_b_mb_intfi(VC1Context *v)
 
             vc1_decode_intra_block(v, s->block[i], i, val, mquant,
                                    (i & 4) ? v->codingset2 : v->codingset);
-            if ((i>3) && (s->flags & CODEC_FLAG_GRAY))
+            if ((i > 3) && (s->avctx->flags & CODEC_FLAG_GRAY))
                 continue;
             v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
             if (v->rangeredfrm)
@@ -2218,7 +2219,7 @@ static void vc1_decode_b_mb_intfi(VC1Context *v)
                 vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
                                    first_block, s->dest[dst_idx] + off,
                                    (i & 4) ? s->uvlinesize : s->linesize,
-                                   (i & 4) && (s->flags & CODEC_FLAG_GRAY), NULL);
+                                   (i & 4) && (s->avctx->flags & CODEC_FLAG_GRAY), NULL);
                 if (!v->ttmbf && ttmb < 8)
                     ttmb = -1;
                 first_block = 0;
@@ -2341,7 +2342,7 @@ static int vc1_decode_b_mb_intfr(VC1Context *v)
 
             vc1_decode_intra_block(v, s->block[i], i, val, mquant,
                                    (i & 4) ? v->codingset2 : v->codingset);
-            if (i > 3 && (s->flags & CODEC_FLAG_GRAY))
+            if (i > 3 && (s->avctx->flags & CODEC_FLAG_GRAY))
                 continue;
             v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
             if (i < 4) {
@@ -2507,7 +2508,7 @@ static int vc1_decode_b_mb_intfr(VC1Context *v)
                     pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
                                              first_block, s->dest[dst_idx] + off,
                                              (i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
-                                             (i & 4) && (s->flags & CODEC_FLAG_GRAY), &block_tt);
+                                             (i & 4) && (s->avctx->flags & CODEC_FLAG_GRAY), &block_tt);
                     block_cbp |= pat << (i << 2);
                     if (!v->ttmbf && ttmb < 8)
                         ttmb = -1;
@@ -2650,7 +2651,7 @@ static void vc1_decode_i_blocks(VC1Context *v)
 
                 vc1_decode_i_block(v, s->block[k], k, val, (k < 4) ? v->codingset : v->codingset2);
 
-                if (k > 3 && (s->flags & CODEC_FLAG_GRAY))
+                if (k > 3 && (s->avctx->flags & CODEC_FLAG_GRAY))
                     continue;
                 v->vc1dsp.vc1_inv_trans_8x8(s->block[k]);
                 if (v->pq >= 9 && v->overlap) {
@@ -2674,7 +2675,7 @@ static void vc1_decode_i_blocks(VC1Context *v)
                 if (s->mb_x) {
                     v->vc1dsp.vc1_h_overlap(s->dest[0], s->linesize);
                     v->vc1dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);
-                    if (!(s->flags & CODEC_FLAG_GRAY)) {
+                    if (!(s->avctx->flags & CODEC_FLAG_GRAY)) {
                         v->vc1dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);
                         v->vc1dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);
                     }
@@ -2684,7 +2685,7 @@ static void vc1_decode_i_blocks(VC1Context *v)
                 if (!s->first_slice_line) {
                     v->vc1dsp.vc1_v_overlap(s->dest[0], s->linesize);
                     v->vc1dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);
-                    if (!(s->flags & CODEC_FLAG_GRAY)) {
+                    if (!(s->avctx->flags & CODEC_FLAG_GRAY)) {
                         v->vc1dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);
                         v->vc1dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);
                     }
@@ -2813,7 +2814,7 @@ static void vc1_decode_i_blocks_adv(VC1Context *v)
                 vc1_decode_i_block_adv(v, block[k], k, val,
                                        (k < 4) ? v->codingset : v->codingset2, mquant);
 
-                if (k > 3 && (s->flags & CODEC_FLAG_GRAY))
+                if (k > 3 && (s->avctx->flags & CODEC_FLAG_GRAY))
                     continue;
                 v->vc1dsp.vc1_inv_trans_8x8(block[k]);
             }
diff --git a/libavcodec/vc1_loopfilter.c b/libavcodec/vc1_loopfilter.c
index 78a5d6565d..e881f475fa 100644
--- a/libavcodec/vc1_loopfilter.c
+++ b/libavcodec/vc1_loopfilter.c
@@ -150,7 +150,7 @@ void ff_vc1_smooth_overlap_filter_iblk(VC1Context *v)
                                       v->block[v->cur_blk_idx][0]);
             v->vc1dsp.vc1_h_s_overlap(v->block[v->left_blk_idx][3],
                                       v->block[v->cur_blk_idx][2]);
-            if (!(s->flags & CODEC_FLAG_GRAY)) {
+            if (!(s->avctx->flags & CODEC_FLAG_GRAY)) {
                 v->vc1dsp.vc1_h_s_overlap(v->block[v->left_blk_idx][4],
                                           v->block[v->cur_blk_idx][4]);
                 v->vc1dsp.vc1_h_s_overlap(v->block[v->left_blk_idx][5],
@@ -169,7 +169,7 @@ void ff_vc1_smooth_overlap_filter_iblk(VC1Context *v)
                                           v->block[v->cur_blk_idx][0]);
                 v->vc1dsp.vc1_v_s_overlap(v->block[v->top_blk_idx][3],
                                           v->block[v->cur_blk_idx][1]);
-                if (!(s->flags & CODEC_FLAG_GRAY)) {
+                if (!(s->avctx->flags & CODEC_FLAG_GRAY)) {
                     v->vc1dsp.vc1_v_s_overlap(v->block[v->top_blk_idx][4],
                                               v->block[v->cur_blk_idx][4]);
                     v->vc1dsp.vc1_v_s_overlap(v->block[v->top_blk_idx][5],
@@ -189,7 +189,7 @@ void ff_vc1_smooth_overlap_filter_iblk(VC1Context *v)
                                       v->block[v->left_blk_idx][0]);
             v->vc1dsp.vc1_v_s_overlap(v->block[v->topleft_blk_idx][3],
                                       v->block[v->left_blk_idx][1]);
-            if (!(s->flags & CODEC_FLAG_GRAY)) {
+            if (!(s->avctx->flags & CODEC_FLAG_GRAY)) {
                 v->vc1dsp.vc1_v_s_overlap(v->block[v->topleft_blk_idx][4],
                                           v->block[v->left_blk_idx][4]);
                 v->vc1dsp.vc1_v_s_overlap(v->block[v->topleft_blk_idx][5],
diff --git a/libavcodec/vc1_mc.c b/libavcodec/vc1_mc.c
index e3a75d5845..4dcb2f5a54 100644
--- a/libavcodec/vc1_mc.c
+++ b/libavcodec/vc1_mc.c
@@ -136,7 +136,7 @@ void ff_vc1_mc_1mv(VC1Context *v, int dir)
     }
 
     /* for grayscale we should not try to read from unknown area */
-    if (s->flags & CODEC_FLAG_GRAY) {
+    if (s->avctx->flags & CODEC_FLAG_GRAY) {
         srcU = s->edge_emu_buffer + 18 * s->linesize;
         srcV = s->edge_emu_buffer + 18 * s->linesize;
     }
@@ -228,7 +228,8 @@ void ff_vc1_mc_1mv(VC1Context *v, int dir)
             s->hdsp.put_no_rnd_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
     }
 
-    if (s->flags & CODEC_FLAG_GRAY) return;
+    if (s->avctx->flags & CODEC_FLAG_GRAY)
+        return;
     /* Chroma MC always uses qpel bilinear */
     uvmx = (uvmx & 3) << 1;
     uvmy = (uvmy & 3) << 1;
@@ -514,7 +515,7 @@ void ff_vc1_mc_4mv_chroma(VC1Context *v, int dir)
 
     if (!v->field_mode && !v->s.last_picture.f->data[0])
         return;
-    if (s->flags & CODEC_FLAG_GRAY)
+    if (s->avctx->flags & CODEC_FLAG_GRAY)
         return;
 
     for (k = 0; k < 4; k++) {
@@ -685,7 +686,7 @@ void ff_vc1_mc_4mv_chroma4(VC1Context *v, int dir, int dir2, int avg)
     int use_ic;
     uint8_t (*lutuv)[256];
 
-    if (s->flags & CODEC_FLAG_GRAY)
+    if (s->avctx->flags & CODEC_FLAG_GRAY)
         return;
 
     for (i = 0; i < 4; i++) {
@@ -836,7 +837,7 @@ void ff_vc1_interp_mc(VC1Context *v)
     }
 
     /* for grayscale we should not try to read from unknown area */
-    if (s->flags & CODEC_FLAG_GRAY) {
+    if (s->avctx->flags & CODEC_FLAG_GRAY) {
         srcU = s->edge_emu_buffer + 18 * s->linesize;
         srcV = s->edge_emu_buffer + 18 * s->linesize;
     }
@@ -933,7 +934,8 @@ void ff_vc1_interp_mc(VC1Context *v)
             s->hdsp.avg_no_rnd_pixels_tab[dxy](s->dest[0] + off, srcY, s->linesize, 16);
     }
 
-    if (s->flags & CODEC_FLAG_GRAY) return;
+    if (s->avctx->flags & CODEC_FLAG_GRAY)
+        return;
     /* Chroma MC always uses qpel blilinear */
     uvmx = (uvmx & 3) << 1;
     uvmy = (uvmy & 3) << 1;
diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c
index 0d578cda40..ac31c9470a 100644
--- a/libavcodec/vc1dec.c
+++ b/libavcodec/vc1dec.c
@@ -183,7 +183,7 @@ static void vc1_draw_sprites(VC1Context *v, SpriteData* sd)
     }
     alpha = av_clip_uint16(sd->coefs[1][6]);
 
-    for (plane = 0; plane < (s->flags&CODEC_FLAG_GRAY ? 1 : 3); plane++) {
+    for (plane = 0; plane < (s->avctx->flags & CODEC_FLAG_GRAY ? 1 : 3); plane++) {
         int width = v->output_width>>!!plane;
 
         for (row = 0; row < v->output_height>>!!plane; row++) {
@@ -301,7 +301,7 @@ static void vc1_sprite_flush(AVCodecContext *avctx)
        wrong but it looks better than doing nothing. */
 
     if (f && f->data[0])
-        for (plane = 0; plane < (s->flags&CODEC_FLAG_GRAY ? 1 : 3); plane++)
+        for (plane = 0; plane < (s->avctx->flags & CODEC_FLAG_GRAY ? 1 : 3); plane++)
             for (i = 0; i < v->sprite_height>>!!plane; i++)
                 memset(f->data[plane] + i * f->linesize[plane],
                        plane ? 128 : 0, f->linesize[plane]);
diff --git a/libavcodec/wmv2.c b/libavcodec/wmv2.c
index 555d30e627..313906c0d2 100644
--- a/libavcodec/wmv2.c
+++ b/libavcodec/wmv2.c
@@ -88,7 +88,7 @@ void ff_wmv2_add_mb(MpegEncContext *s, int16_t block1[6][64],
     wmv2_add_block(w, block1[2], dest_y + 8 * s->linesize,     s->linesize, 2);
     wmv2_add_block(w, block1[3], dest_y + 8 + 8 * s->linesize, s->linesize, 3);
 
-    if (s->flags & CODEC_FLAG_GRAY)
+    if (s->avctx->flags & CODEC_FLAG_GRAY)
         return;
 
     wmv2_add_block(w, block1[4], dest_cb, s->uvlinesize, 4);
@@ -140,7 +140,7 @@ void ff_mspel_motion(MpegEncContext *s, uint8_t *dest_y,
     w->wdsp.put_mspel_pixels_tab[dxy](dest_y     + 8 * linesize, ptr     + 8 * linesize, linesize);
     w->wdsp.put_mspel_pixels_tab[dxy](dest_y + 8 + 8 * linesize, ptr + 8 + 8 * linesize, linesize);
 
-    if (s->flags & CODEC_FLAG_GRAY)
+    if (s->avctx->flags & CODEC_FLAG_GRAY)
         return;
 
     if (s->out_format == FMT_H263) {
diff --git a/libavcodec/x86/mpegvideo.c b/libavcodec/x86/mpegvideo.c
index 1395156a36..d9fb4d24fd 100644
--- a/libavcodec/x86/mpegvideo.c
+++ b/libavcodec/x86/mpegvideo.c
@@ -454,7 +454,7 @@ av_cold void ff_mpv_common_init_x86(MpegEncContext *s)
         s->dct_unquantize_h263_inter = dct_unquantize_h263_inter_mmx;
         s->dct_unquantize_mpeg1_intra = dct_unquantize_mpeg1_intra_mmx;
         s->dct_unquantize_mpeg1_inter = dct_unquantize_mpeg1_inter_mmx;
-        if(!(s->flags & CODEC_FLAG_BITEXACT))
+        if (!(s->avctx->flags & CODEC_FLAG_BITEXACT))
             s->dct_unquantize_mpeg2_intra = dct_unquantize_mpeg2_intra_mmx;
         s->dct_unquantize_mpeg2_inter = dct_unquantize_mpeg2_inter_mmx;
     }