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nutdec: check for negative frame rate in decode_info_header 

A negative frame rate triggers an av_assert2 in av_rescale_rnd.

Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Andreas Cadhalpun 2015-04-28 20:31:56 +02:00 committed by Michael Niedermayer
parent 5bebd13d2d
commit 6621105877
1 changed files with 2 additions and 1 deletions
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3
libavformat/nutdec.c
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@ -553,7 +553,8 @@ 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;
}