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Check for pts==dts on I/P frames in the presence of non low delay decoding and 

discard these invalid timestamps.
fixes issue171.

Originally committed as revision 15641 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2008-10-19 01:02:48 +00:00
parent f781f748b9
commit 9806f846c0
1 changed files with 8 additions and 0 deletions
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8
libavformat/utils.c
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@ -838,6 +838,14 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
pkt->dts -= 1LL<<st->pts_wrap_bits;
}
// some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg)
// we take the conservative approach and discard both
// Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
av_log(s, AV_LOG_ERROR, "invalid dts/pts combination\n");
pkt->dts= pkt->pts= AV_NOPTS_VALUE;
}
if (pkt->duration == 0) {
compute_frame_duration(&num, &den, st, pc, pkt);
if (den && num) {