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avformat/utils: compute_pkt_fields: Fix DTS for the case where has_b_frames is too large but the correct one is constant

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Fixes issue1.m2ts

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-02-22 13:04:18 +01:00
parent d4dfa97ae3
commit 3c096751ff
2 changed files with 53 additions and 4 deletions
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7
libavformat/avformat.h
View File

@ -981,6 +981,13 @@ typedef struct AVStream {
* Internal data to prevent doing update_initial_durations() twice
*/
int update_initial_durations_done;
/**
* Internal data to generate dts from pts
*/
int64_t pts_reorder_error[MAX_REORDER_DELAY+1];
uint8_t pts_reorder_error_count[MAX_REORDER_DELAY+1];
} AVStream;
AVRational av_stream_get_r_frame_rate(const AVStream *s);

50
libavformat/utils.c
View File

@ -962,6 +962,48 @@ static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList
return NULL;
}
static int64_t select_from_pts_buffer(AVStream *st, int64_t *pts_buffer, int64_t dts) {
int onein_oneout = st->codec->codec_id != AV_CODEC_ID_H264 &&
st->codec->codec_id != AV_CODEC_ID_HEVC;
if(!onein_oneout) {
int delay = st->codec->has_b_frames;
int i;
if (dts == AV_NOPTS_VALUE) {
int64_t best_score = INT64_MAX;
for (i = 0; i<delay; i++) {
if (st->pts_reorder_error_count[i]) {
int64_t score = st->pts_reorder_error[i] / st->pts_reorder_error_count[i];
if (score < best_score) {
best_score = score;
dts = pts_buffer[i];
}
}
}
} else {
for (i = 0; i<delay; i++) {
if (pts_buffer[i] != AV_NOPTS_VALUE) {
int64_t diff = FFABS(pts_buffer[i] - dts)
+ (uint64_t)st->pts_reorder_error[i];
diff = FFMAX(diff, st->pts_reorder_error[i]);
st->pts_reorder_error[i] = diff;
st->pts_reorder_error_count[i]++;
if (st->pts_reorder_error_count[i] > 250) {
st->pts_reorder_error[i] >>= 1;
st->pts_reorder_error_count[i] >>= 1;
}
}
}
}
}
if (dts == AV_NOPTS_VALUE)
dts = pts_buffer[0];
return dts;
}
static void update_initial_timestamps(AVFormatContext *s, int stream_index,
int64_t dts, int64_t pts, AVPacket *pkt)
{
@ -1004,8 +1046,8 @@ static void update_initial_timestamps(AVFormatContext *s, int stream_index,
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];
pktl->pkt.dts = select_from_pts_buffer(st, pts_buffer, pktl->pkt.dts);
}
}
@ -1197,8 +1239,8 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
st->pts_buffer[0] = pkt->pts;
for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
if (pkt->dts == AV_NOPTS_VALUE)
pkt->dts = st->pts_buffer[0];
pkt->dts = select_from_pts_buffer(st, st->pts_buffer, pkt->dts);
}
// We skipped it above so we try here.
if (!onein_oneout)