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cafdec: Check duration before use.

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Fix division by 0

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-12-12 00:11:15 +01:00
parent 99a8552dae
commit a202541f9b
1 changed files with 1 additions and 1 deletions
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libavformat/cafdec.c
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@ -312,7 +312,7 @@ static int read_header(AVFormatContext *s)
if (caf->bytes_per_packet > 0 && caf->frames_per_packet > 0) {
if (caf->data_size > 0)
st->nb_frames = (caf->data_size / caf->bytes_per_packet) * caf->frames_per_packet;
} else if (st->nb_index_entries) {
} else if (st->nb_index_entries && st->duration > 0) {
st->codec->bit_rate = st->codec->sample_rate * caf->data_size * 8 /
st->duration;
} else {