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lavf/utils: Try to unwrap pts/dts so as to minimize wraps

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Based on code by: Andrey Utkin <andrey.krieger.utkin@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-08-24 03:08:51 +02:00
parent 254917f078
commit 12b1512e85
1 changed files with 4 additions and 1 deletions
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5
libavformat/utils.c
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@ -1021,7 +1021,10 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
presentation_delayed = 1;
if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > pkt->pts && st->pts_wrap_bits<63){
pkt->dts -= 1LL<<st->pts_wrap_bits;
if(is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > st->cur_dts) {
pkt->dts -= 1LL<<st->pts_wrap_bits;
} else
pkt->pts += 1LL<<st->pts_wrap_bits;
}
// some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)