From 25ef43bb289a3a3a717a684902c0a310e292beba Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Thu, 22 Apr 2004 21:41:08 +0000
Subject: [PATCH] corrupted field pictures segfault fix

Originally committed as revision 3040 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/mpeg12.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index 639ea365d6..d3ff54a7ab 100644
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -2250,8 +2250,8 @@ static int mpeg_decode_slice(Mpeg1Context *s1, int mb_y,
     s->resync_mb_x=
     s->resync_mb_y= -1;
 
-    if (mb_y >= s->mb_height){
-        av_log(s->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", s->mb_y, s->mb_height);
+    if (mb_y<<field_pic >= s->mb_height){
+        av_log(s->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s->mb_height);
         return -1;
     }