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lavf: count skipped samples for initial timestamps.

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If skip_samples is set and timestamps are synthesized using durations,
make them start at -skip_samples (rescaled) instead of 0,
so that the timestamp of the first undiscarded sample is 0.
This commit is contained in:
Nicolas George 2012-07-15 17:38:28 +02:00
parent cd08900393
commit 885fc05865
1 changed files with 4 additions and 0 deletions
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4
libavformat/utils.c
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@ -942,6 +942,10 @@ static void update_initial_durations(AVFormatContext *s, AVStream *st,
AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
int64_t cur_dts= RELATIVE_TS_BASE;
if (st->skip_samples && st->codec->sample_rate && st->time_base.num)
cur_dts -= av_rescale_q(st->skip_samples,
(AVRational){ 1, st->codec->sample_rate },
st->time_base);
if(st->first_dts != AV_NOPTS_VALUE){
cur_dts= st->first_dts;
for(; pktl; pktl= get_next_pkt(s, st, pktl)){