From: Michael Niedermayer <[email protected]>

Fixes issue2405

Signed-off-by: Anton Khirnov <[email protected]>
---
 libavcodec/mpeg12.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index b8a1738..053166a 100644
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -406,6 +406,10 @@ static int mpeg_decode_mb(MpegEncContext *s,
                 }
                 break;
             case MT_FIELD:
+                if(s->progressive_sequence){
+                    av_log(s->avctx, AV_LOG_ERROR, "MT_FIELD in 
progressive_sequence\n");
+                    return -1;
+                }
                 s->mv_type = MV_TYPE_FIELD;
                 if (s->picture_structure == PICT_FRAME) {
                     mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
@@ -443,6 +447,10 @@ static int mpeg_decode_mb(MpegEncContext *s,
                 }
                 break;
             case MT_DMV:
+                if(s->progressive_sequence){
+                    av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in 
progressive_sequence\n");
+                    return -1;
+                }
                 s->mv_type = MV_TYPE_DMV;
                 for(i=0;i<2;i++) {
                     if (USES_LIST(mb_type, i)) {
@@ -1585,7 +1593,6 @@ static void 
mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
 
     if(s->progressive_sequence && !s->frame_pred_frame_dct){
         av_log(s->avctx, AV_LOG_ERROR, "invalid frame_pred_frame_dct\n");
-        s->frame_pred_frame_dct= 1;
     }
 
     if(s->picture_structure == PICT_FRAME){
-- 
1.7.5.3

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