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update_stream_timings: check bitrate for being in range.

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Fixes numerical overflow
Fixes Ticket2089

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-03-04 18:54:00 +01:00
parent dae38a66eb
commit 7992bdbeb4
1 changed files with 3 additions and 1 deletions
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4
libavformat/utils.c
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@ -2230,8 +2230,10 @@ static void update_stream_timings(AVFormatContext *ic)
}
if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) {
/* compute the bitrate */
ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE /
double bitrate = (double)filesize * 8.0 * AV_TIME_BASE /
(double)ic->duration;
if (bitrate >= 0 && bitrate <= INT_MAX)
ic->bit_rate = bitrate;
}
}