From 062421e30d1142729e0fddb0d2d488b0ad699471 Mon Sep 17 00:00:00 2001
From: Daniel Kang <daniel.d.kang@gmail.com>
Date: Sun, 9 Jan 2011 08:28:40 +0000
Subject: [PATCH] eacmv: ensure second-last frame is allocated before
 referencing it Fixes issue2513 Original patch by Daniel Kang, daniel.d.kang
 at gmail

Originally committed as revision 26279 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/eacmv.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavcodec/eacmv.c b/libavcodec/eacmv.c
index f506f7cc3e..016b234243 100644
--- a/libavcodec/eacmv.c
+++ b/libavcodec/eacmv.c
@@ -97,6 +97,7 @@ static void cmv_decode_inter(CmvContext * s, const uint8_t *buf, const uint8_t *
             }else if(raw<buf_end) {  /* inter using second-last frame as reference */
                 int xoffset = (*raw & 0xF) - 7;
                 int yoffset = ((*raw >> 4)) - 7;
+                if (s->last2_frame.data[0])
                 cmv_motcomp(s->frame.data[0], s->frame.linesize[0],
                             s->last2_frame.data[0], s->last2_frame.linesize[0],
                             x*4, y*4, xoffset, yoffset, s->avctx->width, s->avctx->height);