[FFmpeg-cvslog] lavf: Avoid setting avg_frame_rate if delta_dts is negative

[Martin Storsjö]

ffmpeg | branch: master | Martin Storsjö <martin at martin.st> | Fri Sep 20 12:20:06 2013 +0300| [ce67f442be0f6c4a8794272873852e256b5b8ee4] | committer: Martin Storsjö

lavf: Avoid setting avg_frame_rate if delta_dts is negative

This avoids setting avg_frame_rate to invalid (negative)
values.

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable at libav.org
Signed-off-by: Martin Storsjö <martin at martin.st>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ce67f442be0f6c4a8794272873852e256b5b8ee4
---

 libavformat/utils.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavformat/utils.c b/libavformat/utils.c
index 22f6d01..0700c5d 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -2373,7 +2373,8 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
                 double best_error = 0.01;
 
                 if (delta_dts     >= INT64_MAX / st->time_base.num ||
-                    delta_packets >= INT64_MAX / st->time_base.den)
+                    delta_packets >= INT64_MAX / st->time_base.den ||
+                    delta_dts < 0)
                     continue;
                 av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
                           delta_packets*(int64_t)st->time_base.den,