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oggparseskeleton: Check the overall start time before using it. 

Fixes division by zero

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-01-08 02:52:15 +01:00
parent 4c80184cf5
commit 1a088f61e1
1 changed files with 1 additions and 1 deletions
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2
libavformat/oggparseskeleton.c
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@ -61,7 +61,7 @@ static int skeleton_header(AVFormatContext *s, int idx)
start_num = AV_RL64(buf+12);
start_den = AV_RL64(buf+20);
if (start_den) {
if (start_den > 0 && start_num > 0) {
int base_den;
av_reduce(&start_time, &base_den, start_num, start_den, INT_MAX);
avpriv_set_pts_info(st, 64, 1, base_den);