[FFmpeg-cvslog] avformat/oggdec: Skip streams in duration correction that did not had their duration set.

[Michael Niedermayer]

ffmpeg | branch: release/2.8 | Michael Niedermayer <michael at niedermayer.cc> | Fri Dec  9 17:01:14 2016 +0100| [a127f51140e92f1e283c0971a21d5546ee803fbb] | committer: Michael Niedermayer

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 at google.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit ee2a6f5df8c6a151c3e3826872f1b0a07401c62a)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a127f51140e92f1e283c0971a21d5546ee803fbb
---

 libavformat/oggdec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavformat/oggdec.c b/libavformat/oggdec.c
index 856e0e6..ffd1703 100644
--- a/libavformat/oggdec.c
+++ b/libavformat/oggdec.c
@@ -642,6 +642,8 @@ 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;