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lavf: fill in past dts based on reordered pts once the delay becomes known.

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Previously we had ignored the past dts and just filled in from the
point where we have had sufficient information.

This should fix Ticket1734

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2012-09-26 22:54:57 +02:00
parent a8e3815db5
commit 2e4ec8947d
1 changed files with 14 additions and 0 deletions
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14
libavformat/utils.c
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@@ -940,15 +940,21 @@ static void update_initial_timestamps(AVFormatContext *s, int stream_index,
{
AVStream *st= s->streams[stream_index];
AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
int64_t pts_buffer[MAX_REORDER_DELAY];
int64_t shift;
int i, delay;
if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE || is_relative(dts))
return;
delay = st->codec->has_b_frames;
st->first_dts= dts - (st->cur_dts - RELATIVE_TS_BASE);
st->cur_dts= dts;
shift = st->first_dts - RELATIVE_TS_BASE;
for (i=0; i<MAX_REORDER_DELAY; i++)
pts_buffer[i] = AV_NOPTS_VALUE;
if (is_relative(pts))
pts += shift;
@@ -963,6 +969,14 @@ static void update_initial_timestamps(AVFormatContext *s, int stream_index,
if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
st->start_time= pktl->pkt.pts;
if(pktl->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){
pts_buffer[0]= pktl->pkt.pts;
for(i=0; i<delay && pts_buffer[i] > pts_buffer[i+1]; i++)
FFSWAP(int64_t, pts_buffer[i], pts_buffer[i+1]);
if(pktl->pkt.dts == AV_NOPTS_VALUE)
pktl->pkt.dts= pts_buffer[0];
}
}
if (st->start_time == AV_NOPTS_VALUE)
st->start_time = pts;