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avformat/utils: detect MPEG streams with faulty DTS and discard affected DTS

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Fixes issue2.ts

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-03-03 01:55:18 +01:00
parent 411f8f4c9a
commit 2dcaa1b9d1
2 changed files with 32 additions and 0 deletions
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7
libavformat/avformat.h
View File

@ -988,6 +988,13 @@ typedef struct AVStream {
int64_t pts_reorder_error[MAX_REORDER_DELAY+1];
uint8_t pts_reorder_error_count[MAX_REORDER_DELAY+1];
/**
* Internal data to analyze DTS and detect faulty mpeg streams
*/
int64_t last_dts_for_order_check;
uint8_t dts_ordered;
uint8_t dts_misordered;
} AVStream;
AVRational av_stream_get_r_frame_rate(const AVStream *s);

25
libavformat/utils.c
View File

@ -1120,6 +1120,28 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
if (s->flags & AVFMT_FLAG_NOFILLIN)
return;
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && pkt->dts != AV_NOPTS_VALUE) {
if (pkt->dts == pkt->pts && st->last_dts_for_order_check != AV_NOPTS_VALUE) {
if (st->last_dts_for_order_check <= pkt->dts) {
st->dts_ordered++;
} else {
av_log(s, st->dts_misordered ? AV_LOG_DEBUG : AV_LOG_WARNING,
"DTS %"PRIi64" < %"PRIi64" out of order\n",
pkt->dts,
st->last_dts_for_order_check);
st->dts_misordered++;
}
if (st->dts_ordered + st->dts_misordered > 250) {
st->dts_ordered >>= 1;
st->dts_misordered >>= 1;
}
}
st->last_dts_for_order_check = pkt->dts;
if (st->dts_ordered < 8*st->dts_misordered && pkt->dts == pkt->pts)
pkt->dts = AV_NOPTS_VALUE;
}
if ((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
pkt->dts = AV_NOPTS_VALUE;
@ -1664,6 +1686,7 @@ void ff_read_frame_flush(AVFormatContext *s)
st->parser = NULL;
}
st->last_IP_pts = AV_NOPTS_VALUE;
st->last_dts_for_order_check = AV_NOPTS_VALUE;
if (st->first_dts == AV_NOPTS_VALUE)
st->cur_dts = RELATIVE_TS_BASE;
else
@ -2488,6 +2511,7 @@ static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
st = ic->streams[i];
st->cur_dts = st->first_dts;
st->last_IP_pts = AV_NOPTS_VALUE;
st->last_dts_for_order_check = AV_NOPTS_VALUE;
for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
st->pts_buffer[j] = AV_NOPTS_VALUE;
}
@ -3623,6 +3647,7 @@ AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
/* default pts setting is MPEG-like */
avpriv_set_pts_info(st, 33, 1, 90000);
st->last_IP_pts = AV_NOPTS_VALUE;
st->last_dts_for_order_check = AV_NOPTS_VALUE;
for (i = 0; i < MAX_REORDER_DELAY + 1; i++)
st->pts_buffer[i] = AV_NOPTS_VALUE;