From d680842a7f33c156cb122dc56fbf8967be1dfc68 Mon Sep 17 00:00:00 2001
From: Mark Nauwelaerts <mark.nauwelaerts@collabora.co.uk>
Date: Tue, 22 Feb 2011 14:00:11 +0100
Subject: [PATCH] avidemux: check for NULL audio stream format header when
 parsing stream

---
 gst/avi/gstavidemux.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gst/avi/gstavidemux.c b/gst/avi/gstavidemux.c
index 95131d3a41..0627710b6f 100644
--- a/gst/avi/gstavidemux.c
+++ b/gst/avi/gstavidemux.c
@@ -2020,10 +2020,12 @@ gst_avi_demux_parse_stream (GstAviDemux * avi, GstBuffer * buf)
             res =
                 gst_riff_parse_strf_auds (element, sub, &stream->strf.auds,
                 &stream->extradata);
+            sub = NULL;
+            if (!res)
+              break;
             stream->is_vbr = (stream->strh->samplesize == 0)
                 && stream->strh->scale > 1
                 && stream->strf.auds->blockalign != 1;
-            sub = NULL;
             GST_DEBUG_OBJECT (element, "marking audio as VBR:%d, res %d",
                 stream->is_vbr, res);
             /* we need these or we have no way to come up with timestamps */