From 387976383355ebb2d64eb6ef94a145594a6e015c Mon Sep 17 00:00:00 2001
From: Aurelien Jacobs <aurel@gnuage.org>
Date: Tue, 5 Aug 2008 00:42:26 +0000
Subject: [PATCH] matroskadec: don't try to re-read already parsed ID in
 matroska_parse_cluster()

Originally committed as revision 14600 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavformat/matroskadec.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index 82b8960848..f4233066c2 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -1631,7 +1631,15 @@ static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
     MatroskaCluster cluster = { 0 };
     EbmlList *blocks_list;
     MatroskaBlock *blocks;
-    int i, res = ebml_parse(matroska, matroska_clusters, &cluster);
+    int i, res;
+    if (matroska->has_cluster_id){
+        /* For the first cluster we parse, it's ID was already read as
+           part of matroska_read_header(), so don't read it again */
+        res = ebml_parse_id(matroska, matroska_clusters,
+                            MATROSKA_ID_CLUSTER, &cluster);
+        matroska->has_cluster_id = 0;
+    } else
+        res = ebml_parse(matroska, matroska_clusters, &cluster);
     blocks_list = &cluster.blocks;
     blocks = blocks_list->elem;
     for (i=0; !res && i<blocks_list->nb_elem; i++)