From 928346091a2eaa3cda72bf348d29712afee0f73a Mon Sep 17 00:00:00 2001
From: Wolfram Gloger <wmglo@dent.med.uni-muenchen.de>
Date: Wed, 5 Dec 2012 19:26:12 +0100
Subject: [PATCH] mpegvideo_parser: fix buffer access beyond end

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

diff --git a/libavcodec/mpegvideo_parser.c b/libavcodec/mpegvideo_parser.c
index c112a94841..35a91604d2 100644
--- a/libavcodec/mpegvideo_parser.c
+++ b/libavcodec/mpegvideo_parser.c
@@ -56,6 +56,7 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s,
         case PICTURE_START_CODE:
             if (bytes_left >= 2) {
                 s->pict_type = (buf[1] >> 3) & 7;
+                if (bytes_left >= 4)
                 vbv_delay = ((buf[1] & 0x07) << 13) | (buf[2] << 5) | (buf[3]  >> 3);
             }
             break;