[FFmpeg-devel] [PATCH] nutdec: check for negative frame rate in decode_info_header

[Andreas Cadhalpun]

A negative frame rate triggers an av_assert2 in av_rescale_rnd.

Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>
---
 libavformat/nutdec.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavformat/nutdec.c b/libavformat/nutdec.c
index 4f5037f..191b285 100644
--- a/libavformat/nutdec.c
+++ b/libavformat/nutdec.c
@@ -557,7 +557,8 @@ static int decode_info_header(NUTContext *nut)
 
             if (stream_id_plus1 && !strcmp(name, "r_frame_rate")) {
                 sscanf(str_value, "%d/%d", &st->r_frame_rate.num, &st->r_frame_rate.den);
-                if (st->r_frame_rate.num >= 1000LL*st->r_frame_rate.den)
+                if (st->r_frame_rate.num >= 1000LL*st->r_frame_rate.den ||
+                    st->r_frame_rate.num < 0 || st->r_frame_rate.num < 0)
                     st->r_frame_rate.num = st->r_frame_rate.den = 0;
                 continue;
             }
-- 
2.1.4