From d6c21c7a6437a490568d9e049658190bc618b104 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Wed, 19 Oct 2011 03:28:25 +0200
Subject: [PATCH] mpeg12dec: assert no field frame mess

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 libavcodec/mpeg12.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index ead734939d..358ea432bc 100644
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -961,6 +961,7 @@ static int mpeg_decode_mb(MpegEncContext *s, DCTELEM block[12][64])
                         }
                     }
                 } else {
+                    av_assert0(!s->progressive_sequence);
                     mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
                     for (i = 0; i < 2; i++) {
                         if (USES_LIST(mb_type, i)) {