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lavf/utils: more complete dts checks

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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 00:24:46 +01:00
parent 3b57bb478f
commit 953061ed95
1 changed files with 2 additions and 1 deletions
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libavformat/utils.c
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@ -2861,7 +2861,8 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
{
int64_t last = st->info->last_dts;
if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){
if( pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last
&& pkt->dts - (uint64_t)last < INT64_MAX){
double dts= (is_relative(pkt->dts) ? pkt->dts - RELATIVE_TS_BASE : pkt->dts) * av_q2d(st->time_base);
int64_t duration= pkt->dts - last;