From ee2a6f5df8c6a151c3e3826872f1b0a07401c62a Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Fri, 9 Dec 2016 17:01:14 +0100
Subject: [PATCH] avformat/oggdec: Skip streams in duration correction that did
 not had their duration set.

Fixes: part of 670190.ogg
Fixes integer overflow

Found-by: Matt Wolenetz <wolenetz@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavformat/oggdec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavformat/oggdec.c b/libavformat/oggdec.c
index 47a0cbae05..e1ef21337c 100644
--- a/libavformat/oggdec.c
+++ b/libavformat/oggdec.c
@@ -643,6 +643,8 @@ static int ogg_get_length(AVFormatContext *s)
         int64_t pts;
         if (i < 0) continue;
         pts = ogg_calc_pts(s, i, NULL);
+        if (s->streams[i]->duration == AV_NOPTS_VALUE)
+            continue;
         if (pts != AV_NOPTS_VALUE && s->streams[i]->start_time == AV_NOPTS_VALUE && !ogg->streams[i].got_start) {
             s->streams[i]->duration -= pts;
             ogg->streams[i].got_start= 1;