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timestamps generation improvement when parsing avi

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patch by Joakim \ elupus chez ecce dot se /
original thread:
date: 03/19/2007 01:47 AM
subject: [Ffmpeg-devel] [RFC] Improvement for the odd timestamp generation when parser is in use.

Originally committed as revision 8725 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Joakim Plate
2007-04-13 07:50:04 +00:00
committed by Benoit Fouet
parent 946d3b12a1
commit a74008a4c3
5 changed files with 25 additions and 7 deletions
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11
libavformat/utils.c
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@ -584,6 +584,7 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
AVCodecParserContext *pc, AVPacket *pkt)
{
int num, den, presentation_delayed, delay, i;
int64_t offset;
/* handle wrapping */
if(st->cur_dts != AV_NOPTS_VALUE){
if(pkt->pts != AV_NOPTS_VALUE)
@ -599,6 +600,16 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
}
}
/* correct timestamps with byte offset if demuxers only have timestamps on packet boundaries */
if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){
/* this will estimate bitrate based on this frame's duration and size */
offset = av_rescale(pc->offset, pkt->duration, pkt->size);
if(pkt->pts != AV_NOPTS_VALUE)
pkt->pts += offset;
if(pkt->dts != AV_NOPTS_VALUE)
pkt->dts += offset;
}
if(is_intra_only(st->codec))
pkt->flags |= PKT_FLAG_KEY;