From 7305d97f04f95e6b6717c5bba5cf6b350824094e Mon Sep 17 00:00:00 2001
From: Maksym Veremeyenko <verem@m1stereo.tv>
Date: Tue, 25 Aug 2009 09:46:16 +0000
Subject: [PATCH] Do not read index chunks as audio/video data; closes issue
 1336. patch by Maksym Veremeyenko, verem m1stereo tv

Originally committed as revision 19700 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavformat/avidec.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libavformat/avidec.c b/libavformat/avidec.c
index 71235ec47d..7093e9150d 100644
--- a/libavformat/avidec.c
+++ b/libavformat/avidec.c
@@ -826,6 +826,12 @@ resync:
         if(!((i-avi->last_pkt_pos)&1) && get_stream_idx(d+1) < s->nb_streams)
             continue;
 
+        //detect ##ix chunk and skip
+        if(d[2] == 'i' && d[3] == 'x' && n < s->nb_streams){
+            url_fskip(pb, size);
+            goto resync;
+        }
+
         //parse ##dc/##wb
         if(n < s->nb_streams){
             AVStream *st;