From 1892052f8dee858dcab3292d1c40c5deef67e18f Mon Sep 17 00:00:00 2001
From: Thierry Foucu <tfoucu@gmail.com>
Date: Fri, 12 Aug 2011 16:27:59 -0700
Subject: [PATCH] mov: Set negative Sample_duration in STTS to 1

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 libavformat/mov.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavformat/mov.c b/libavformat/mov.c
index fdb29a01bf..96a99280e1 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -1471,6 +1471,11 @@ static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
 
         sample_count=avio_rb32(pb);
         sample_duration = avio_rb32(pb);
+        /* sample_duration < 0 is invalid based on the spec */
+        if (sample_duration < 0) {
+            av_log(c->fc, AV_LOG_ERROR, "Invalid SampleDelta in STTS %d", sample_duration);
+            sample_duration = 1;
+        }
         sc->stts_data[i].count= sample_count;
         sc->stts_data[i].duration= sample_duration;