Hi
The attached patch fixes a possibility for movenc.c to SIGFPE if
trackDuration is zero when writing esds. This can happen if the user
manages to mux a single AAC packet with dts = 0 and duration = 0.
/Tomas
>From 7dbf9ac26ca677fc664a4569601bb0204e8410be Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tomas=20H=C3=A4rdin?= <tomas.har...@codemill.se>
Date: Wed, 11 May 2011 09:47:50 +0200
Subject: [PATCH] Avoid divide by zero in compute_avg_bitrate()
This can happen if muxing a single AAC packet with duration = 0
---
libavformat/movenc.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index a3d470a..d950664 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -261,6 +261,10 @@ static unsigned compute_avg_bitrate(MOVTrack *track)
{
uint64_t size = 0;
int i;
+
+ if (!track->trackDuration)
+ return 0;
+
for (i = 0; i < track->entry; i++)
size += track->cluster[i].size;
return size * 8 * track->timescale / track->trackDuration;
--
1.7.1
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