From dd7b219c4223a317516ed8d597c1ad56b52a8b68 Mon Sep 17 00:00:00 2001
From: Stefan Kost <ensonic@users.sf.net>
Date: Tue, 8 Feb 2011 12:17:53 +0200
Subject: [PATCH] ffmpeg: don't divide by 0 when checking the framerates

Check for denom==0 first and set it to on in that case.
---
 ext/ffmpeg/gstffmpegcodecmap.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/ext/ffmpeg/gstffmpegcodecmap.c b/ext/ffmpeg/gstffmpegcodecmap.c
index de3bd5f058..23776e571e 100644
--- a/ext/ffmpeg/gstffmpegcodecmap.c
+++ b/ext/ffmpeg/gstffmpegcodecmap.c
@@ -204,6 +204,10 @@ gst_ff_vid_caps_new (AVCodecContext * context, enum CodecID codec_id,
     num = context->time_base.den / context->ticks_per_frame;
     denom = context->time_base.num;
 
+    if (!denom) {
+      GST_LOG ("invalid framerate: %d/0, -> %d/1", num, num);
+      denom = 1;
+    }
     if (gst_util_fraction_compare (num, denom, 1000, 1) > 0) {
       GST_LOG ("excessive framerate: %d/%d, -> 0/1", num, denom);
       num = 0;