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Code Issues Releases Activity

lavf/dv: do not set video timebase more than once

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Current code will call avpriv_set_pts_info() for each video frame,
possibly setting a different timebase if the stream framerate changes.
This violates API conventions, as the timebase is supposed to stay
constant after stream creation.

Change the demuxer to set a single timebase that is fine enough to
handle all supported DV framerates.

The seek tests change slightly because the new timebase is more
granular.
This commit is contained in:
Anton Khirnov 2022-08-24 10:27:09 +02:00
parent 5617465916
commit c7a852b638
8 changed files with 91 additions and 60 deletions
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3
libavcodec/dv.h
View File

@ -60,6 +60,9 @@ enum DVPackType {
*/
#define DV_MAX_FRAME_SIZE 576000
// LCM of video framerate numerators
#define DV_TIMESCALE_VIDEO 60000
/**
* maximum number of blocks per macroblock in any DV format
*/

22
libavformat/avidec.c
View File

@ -1869,13 +1869,20 @@ static int avi_read_seek(AVFormatContext *s, int stream_index,
st = s->streams[stream_index];
sti = ffstream(st);
ast = st->priv_data;
index = av_index_search_timestamp(st,
timestamp * FFMAX(ast->sample_size, 1),
flags);
if (avi->dv_demux) {
// index entries are in the AVI scale/rate timebase, which does
// not match DV demuxer's stream timebase
timestamp = av_rescale_q(timestamp, st->time_base,
(AVRational){ ast->scale, ast->rate });
} else
timestamp *= FFMAX(ast->sample_size, 1);
index = av_index_search_timestamp(st, timestamp, flags);
if (index < 0) {
if (sti->nb_index_entries > 0)
av_log(s, AV_LOG_DEBUG, "Failed to find timestamp %"PRId64 " in index %"PRId64 " .. %"PRId64 "\n",
timestamp * FFMAX(ast->sample_size, 1),
timestamp,
sti->index_entries[0].timestamp,
sti->index_entries[sti->nb_index_entries - 1].timestamp);
return AVERROR_INVALIDDATA;
@ -1883,7 +1890,7 @@ static int avi_read_seek(AVFormatContext *s, int stream_index,
/* find the position */
pos = sti->index_entries[index].pos;
timestamp = sti->index_entries[index].timestamp / FFMAX(ast->sample_size, 1);
timestamp = sti->index_entries[index].timestamp;
av_log(s, AV_LOG_TRACE, "XX %"PRId64" %d %"PRId64"\n",
timestamp, index, sti->index_entries[index].timestamp);
@ -1898,11 +1905,14 @@ static int avi_read_seek(AVFormatContext *s, int stream_index,
/* Feed the DV video stream version of the timestamp to the */
/* DV demux so it can synthesize correct timestamps. */
ff_dv_offset_reset(avi->dv_demux, timestamp);
ff_dv_ts_reset(avi->dv_demux,
av_rescale_q(timestamp, (AVRational){ ast->scale, ast->rate },
st->time_base));
avi->stream_index = -1;
return 0;
}
timestamp /= FFMAX(ast->sample_size, 1);
pos_min = pos;
for (i = 0; i < s->nb_streams; i++) {

36
libavformat/dv.c
View File

@ -69,6 +69,8 @@ struct DVDemuxContext {
uint8_t audio_buf[4][8192];
int ach;
int frames;
int64_t next_pts_video;
};
static inline uint16_t dv_audio_12to16(uint16_t sample)
@ -314,8 +316,6 @@ static int dv_extract_video_info(DVDemuxContext *c, const uint8_t *frame)
par = c->vst->codecpar;
avpriv_set_pts_info(c->vst, 64, c->sys->time_base.num,
c->sys->time_base.den);
c->vst->avg_frame_rate = av_inv_q(c->vst->time_base);
/* finding out SAR is a little bit messy */
@ -360,6 +360,8 @@ static int dv_init_demux(AVFormatContext *s, DVDemuxContext *c)
c->vst->codecpar->bit_rate = 25000000;
c->vst->start_time = 0;
avpriv_set_pts_info(c->vst, 64, 1, DV_TIMESCALE_VIDEO);
/* Audio streams are added later as they are encountered. */
s->ctx_flags |= AVFMTCTX_NOHEADER;
@ -463,7 +465,10 @@ int avpriv_dv_produce_packet(DVDemuxContext *c, AVPacket *pkt,
pkt->size = size;
pkt->flags |= AV_PKT_FLAG_KEY;
pkt->stream_index = c->vst->index;
pkt->pts = c->frames;
pkt->pts = c->next_pts_video;
pkt->duration = av_rescale_q(1, c->sys->time_base, c->vst->time_base);
c->next_pts_video += pkt->duration;
}
c->frames++;
@ -472,28 +477,34 @@ int avpriv_dv_produce_packet(DVDemuxContext *c, AVPacket *pkt,
}
static int64_t dv_frame_offset(AVFormatContext *s, DVDemuxContext *c,
int64_t timestamp, int flags)
int64_t *timestamp)
{
// FIXME: sys may be wrong if last dv_read_packet() failed (buffer is junk)
FFFormatContext *const si = ffformatcontext(s);
const int frame_size = c->sys->frame_size;
int64_t frame_count = av_rescale_q(*timestamp, c->vst->time_base, c->sys->time_base);
int64_t offset;
int64_t size = avio_size(s->pb) - si->data_offset;
int64_t max_offset = ((size - 1) / frame_size) * frame_size;
offset = frame_size * timestamp;
offset = frame_size * frame_count;
if (size >= 0 && offset > max_offset)
offset = max_offset;
else if (offset < 0)
offset = 0;
*timestamp = av_rescale_q(offset / frame_size, c->sys->time_base, c->vst->time_base);
return offset + si->data_offset;
}
void ff_dv_offset_reset(DVDemuxContext *c, int64_t frame_offset)
void ff_dv_ts_reset(DVDemuxContext *c, int64_t ts)
{
c->frames = frame_offset;
c->frames = !c->sys ? 0 :
av_rescale_q(ts, c->vst->time_base, c->sys->time_base);
c->next_pts_video = ts;
c->audio_pkt[0].size = c->audio_pkt[1].size = 0;
c->audio_pkt[2].size = c->audio_pkt[3].size = 0;
}
@ -618,12 +629,19 @@ static int dv_read_seek(AVFormatContext *s, int stream_index,
{
RawDVContext *r = s->priv_data;
DVDemuxContext *c = &r->dv_demux;
int64_t offset = dv_frame_offset(s, c, timestamp, flags);
int64_t offset;
// seek using the video stream
if (stream_index != c->vst->index)
timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base,
c->vst->time_base);
offset = dv_frame_offset(s, c, &timestamp);
if (avio_seek(s->pb, offset, SEEK_SET) < 0)
return -1;
ff_dv_offset_reset(c, offset / c->sys->frame_size);
ff_dv_ts_reset(c, timestamp);
return 0;
}

2
libavformat/dv.h
View File

@ -34,6 +34,6 @@ typedef struct DVDemuxContext DVDemuxContext;
DVDemuxContext* avpriv_dv_init_demux(AVFormatContext* s);
int avpriv_dv_get_packet(DVDemuxContext*, AVPacket *);
int avpriv_dv_produce_packet(DVDemuxContext*, AVPacket*, uint8_t*, int, int64_t);
void ff_dv_offset_reset(DVDemuxContext *c, int64_t frame_offset);
void ff_dv_ts_reset(DVDemuxContext *c, int64_t ts_video);
#endif /* AVFORMAT_DV_H */

16
tests/ref/seek/lavf-dv
View File

@ -3,9 +3,9 @@ ret: 0 st:-1 flags:0 ts:-1.000000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:144000
ret: 0 st:-1 flags:1 ts: 1.894167
ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos:3456000 size:144000
ret: 0 st: 0 flags:0 ts: 0.800000
ret: 0 st: 0 flags:0 ts: 0.788333
ret: 0 st: 0 flags:1 dts: 0.800000 pts: 0.800000 pos:2880000 size:144000
ret: 0 st: 0 flags:1 ts:-0.320000
ret: 0 st: 0 flags:1 ts:-0.317500
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:144000
ret: 0 st: 1 flags:0 ts: 2.560000
ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos:3456000 size:144000
@ -15,9 +15,9 @@ ret: 0 st:-1 flags:0 ts: 0.365002
ret: 0 st: 0 flags:1 dts: 0.360000 pts: 0.360000 pos:1296000 size:144000
ret: 0 st:-1 flags:1 ts:-0.740831
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:144000
ret: 0 st: 0 flags:0 ts: 2.160000
ret: 0 st: 0 flags:0 ts: 2.153333
ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos:3456000 size:144000
ret: 0 st: 0 flags:1 ts: 1.040000
ret: 0 st: 0 flags:1 ts: 1.047500
ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos:3456000 size:144000
ret: 0 st: 1 flags:0 ts:-0.040000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:144000
@ -27,9 +27,9 @@ ret: 0 st:-1 flags:0 ts: 1.730004
ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos:3456000 size:144000
ret: 0 st:-1 flags:1 ts: 0.624171
ret: 0 st: 0 flags:1 dts: 0.640000 pts: 0.640000 pos:2304000 size:144000
ret: 0 st: 0 flags:0 ts:-0.480000
ret: 0 st: 0 flags:0 ts:-0.481667
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:144000
ret: 0 st: 0 flags:1 ts: 2.400000
ret: 0 st: 0 flags:1 ts: 2.412500
ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos:3456000 size:144000
ret: 0 st: 1 flags:0 ts: 1.320000
ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos:3456000 size:144000
@ -39,9 +39,9 @@ ret: 0 st:-1 flags:0 ts:-0.904994
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:144000
ret: 0 st:-1 flags:1 ts: 1.989173
ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos:3456000 size:144000
ret: 0 st: 0 flags:0 ts: 0.880000
ret: 0 st: 0 flags:0 ts: 0.883333
ret: 0 st: 0 flags:1 dts: 0.880000 pts: 0.880000 pos:3168000 size:144000
ret: 0 st: 0 flags:1 ts:-0.240000
ret: 0 st: 0 flags:1 ts:-0.222500
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:144000
ret: 0 st: 1 flags:0 ts: 2.680000
ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos:3456000 size:144000

24
tests/ref/seek/vsynth_lena-dv
View File

@ -3,49 +3,49 @@ ret: 0 st:-1 flags:0 ts:-1.000000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:144000
ret: 0 st:-1 flags:1 ts: 1.894167
ret: 0 st: 0 flags:1 dts: 1.880000 pts: 1.880000 pos:6768000 size:144000
ret: 0 st: 0 flags:0 ts: 0.800000
ret: 0 st: 0 flags:0 ts: 0.788333
ret: 0 st: 0 flags:1 dts: 0.800000 pts: 0.800000 pos:2880000 size:144000
ret: 0 st: 0 flags:1 ts:-0.320000
ret: 0 st: 0 flags:1 ts:-0.317500
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:144000
ret: 0 st:-1 flags:0 ts: 2.576668
ret: 0 st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
ret: 0 st:-1 flags:1 ts: 1.470835
ret: 0 st: 0 flags:1 dts: 1.480000 pts: 1.480000 pos:5328000 size:144000
ret: 0 st: 0 flags:0 ts: 0.360000
ret: 0 st: 0 flags:0 ts: 0.365000
ret: 0 st: 0 flags:1 dts: 0.360000 pts: 0.360000 pos:1296000 size:144000
ret: 0 st: 0 flags:1 ts:-0.760000
ret: 0 st: 0 flags:1 ts:-0.740833
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:144000
ret: 0 st:-1 flags:0 ts: 2.153336
ret: 0 st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
ret: 0 st:-1 flags:1 ts: 1.047503
ret: 0 st: 0 flags:1 dts: 1.040000 pts: 1.040000 pos:3744000 size:144000
ret: 0 st: 0 flags:0 ts:-0.040000
ret: 0 st: 0 flags:0 ts:-0.058333
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:144000
ret: 0 st: 0 flags:1 ts: 2.840000
ret: 0 st: 0 flags:1 ts: 2.835833
ret: 0 st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
ret: 0 st:-1 flags:0 ts: 1.730004
ret: 0 st: 0 flags:1 dts: 1.720000 pts: 1.720000 pos:6192000 size:144000
ret: 0 st:-1 flags:1 ts: 0.624171
ret: 0 st: 0 flags:1 dts: 0.640000 pts: 0.640000 pos:2304000 size:144000
ret: 0 st: 0 flags:0 ts:-0.480000
ret: 0 st: 0 flags:0 ts:-0.481667
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:144000
ret: 0 st: 0 flags:1 ts: 2.400000
ret: 0 st: 0 flags:1 ts: 2.412500
ret: 0 st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
ret: 0 st:-1 flags:0 ts: 1.306672
ret: 0 st: 0 flags:1 dts: 1.320000 pts: 1.320000 pos:4752000 size:144000
ret: 0 st:-1 flags:1 ts: 0.200839
ret: 0 st: 0 flags:1 dts: 0.200000 pts: 0.200000 pos: 720000 size:144000
ret: 0 st: 0 flags:0 ts:-0.920000
ret: 0 st: 0 flags:0 ts:-0.905000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:144000
ret: 0 st: 0 flags:1 ts: 2.000000
ret: 0 st: 0 flags:1 ts: 1.989167
ret: 0 st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
ret: 0 st:-1 flags:0 ts: 0.883340
ret: 0 st: 0 flags:1 dts: 0.880000 pts: 0.880000 pos:3168000 size:144000
ret: 0 st:-1 flags:1 ts:-0.222493
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:144000
ret: 0 st: 0 flags:0 ts: 2.680000
ret: 0 st: 0 flags:0 ts: 2.671667
ret: 0 st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
ret: 0 st: 0 flags:1 ts: 1.560000
ret: 0 st: 0 flags:1 ts: 1.565833
ret: 0 st: 0 flags:1 dts: 1.560000 pts: 1.560000 pos:5616000 size:144000
ret: 0 st:-1 flags:0 ts: 0.460008
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos:1728000 size:144000

24
tests/ref/seek/vsynth_lena-dv-411
View File

@ -3,49 +3,49 @@ ret: 0 st:-1 flags:0 ts:-1.000000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:144000
ret: 0 st:-1 flags:1 ts: 1.894167
ret: 0 st: 0 flags:1 dts: 1.880000 pts: 1.880000 pos:6768000 size:144000
ret: 0 st: 0 flags:0 ts: 0.800000
ret: 0 st: 0 flags:0 ts: 0.788333
ret: 0 st: 0 flags:1 dts: 0.800000 pts: 0.800000 pos:2880000 size:144000
ret: 0 st: 0 flags:1 ts:-0.320000
ret: 0 st: 0 flags:1 ts:-0.317500
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:144000
ret: 0 st:-1 flags:0 ts: 2.576668
ret: 0 st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
ret: 0 st:-1 flags:1 ts: 1.470835
ret: 0 st: 0 flags:1 dts: 1.480000 pts: 1.480000 pos:5328000 size:144000
ret: 0 st: 0 flags:0 ts: 0.360000
ret: 0 st: 0 flags:0 ts: 0.365000
ret: 0 st: 0 flags:1 dts: 0.360000 pts: 0.360000 pos:1296000 size:144000
ret: 0 st: 0 flags:1 ts:-0.760000
ret: 0 st: 0 flags:1 ts:-0.740833
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:144000
ret: 0 st:-1 flags:0 ts: 2.153336
ret: 0 st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
ret: 0 st:-1 flags:1 ts: 1.047503
ret: 0 st: 0 flags:1 dts: 1.040000 pts: 1.040000 pos:3744000 size:144000
ret: 0 st: 0 flags:0 ts:-0.040000
ret: 0 st: 0 flags:0 ts:-0.058333
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:144000
ret: 0 st: 0 flags:1 ts: 2.840000
ret: 0 st: 0 flags:1 ts: 2.835833
ret: 0 st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
ret: 0 st:-1 flags:0 ts: 1.730004
ret: 0 st: 0 flags:1 dts: 1.720000 pts: 1.720000 pos:6192000 size:144000
ret: 0 st:-1 flags:1 ts: 0.624171
ret: 0 st: 0 flags:1 dts: 0.640000 pts: 0.640000 pos:2304000 size:144000
ret: 0 st: 0 flags:0 ts:-0.480000
ret: 0 st: 0 flags:0 ts:-0.481667
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:144000
ret: 0 st: 0 flags:1 ts: 2.400000
ret: 0 st: 0 flags:1 ts: 2.412500
ret: 0 st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
ret: 0 st:-1 flags:0 ts: 1.306672
ret: 0 st: 0 flags:1 dts: 1.320000 pts: 1.320000 pos:4752000 size:144000
ret: 0 st:-1 flags:1 ts: 0.200839
ret: 0 st: 0 flags:1 dts: 0.200000 pts: 0.200000 pos: 720000 size:144000
ret: 0 st: 0 flags:0 ts:-0.920000
ret: 0 st: 0 flags:0 ts:-0.905000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:144000
ret: 0 st: 0 flags:1 ts: 2.000000
ret: 0 st: 0 flags:1 ts: 1.989167
ret: 0 st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
ret: 0 st:-1 flags:0 ts: 0.883340
ret: 0 st: 0 flags:1 dts: 0.880000 pts: 0.880000 pos:3168000 size:144000
ret: 0 st:-1 flags:1 ts:-0.222493
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:144000
ret: 0 st: 0 flags:0 ts: 2.680000
ret: 0 st: 0 flags:0 ts: 2.671667
ret: 0 st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:7056000 size:144000
ret: 0 st: 0 flags:1 ts: 1.560000
ret: 0 st: 0 flags:1 ts: 1.565833
ret: 0 st: 0 flags:1 dts: 1.560000 pts: 1.560000 pos:5616000 size:144000
ret: 0 st:-1 flags:0 ts: 0.460008
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos:1728000 size:144000

24
tests/ref/seek/vsynth_lena-dv-50
View File

@ -3,49 +3,49 @@ ret: 0 st:-1 flags:0 ts:-1.000000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:288000
ret: 0 st:-1 flags:1 ts: 1.894167
ret: 0 st: 0 flags:1 dts: 1.880000 pts: 1.880000 pos:13536000 size:288000
ret: 0 st: 0 flags:0 ts: 0.800000
ret: 0 st: 0 flags:0 ts: 0.788333
ret: 0 st: 0 flags:1 dts: 0.800000 pts: 0.800000 pos:5760000 size:288000
ret: 0 st: 0 flags:1 ts:-0.320000
ret: 0 st: 0 flags:1 ts:-0.317500
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:288000
ret: 0 st:-1 flags:0 ts: 2.576668
ret: 0 st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:14112000 size:288000
ret: 0 st:-1 flags:1 ts: 1.470835
ret: 0 st: 0 flags:1 dts: 1.480000 pts: 1.480000 pos:10656000 size:288000
ret: 0 st: 0 flags:0 ts: 0.360000
ret: 0 st: 0 flags:0 ts: 0.365000
ret: 0 st: 0 flags:1 dts: 0.360000 pts: 0.360000 pos:2592000 size:288000
ret: 0 st: 0 flags:1 ts:-0.760000
ret: 0 st: 0 flags:1 ts:-0.740833
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:288000
ret: 0 st:-1 flags:0 ts: 2.153336
ret: 0 st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:14112000 size:288000
ret: 0 st:-1 flags:1 ts: 1.047503
ret: 0 st: 0 flags:1 dts: 1.040000 pts: 1.040000 pos:7488000 size:288000
ret: 0 st: 0 flags:0 ts:-0.040000
ret: 0 st: 0 flags:0 ts:-0.058333
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:288000
ret: 0 st: 0 flags:1 ts: 2.840000
ret: 0 st: 0 flags:1 ts: 2.835833
ret: 0 st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:14112000 size:288000
ret: 0 st:-1 flags:0 ts: 1.730004
ret: 0 st: 0 flags:1 dts: 1.720000 pts: 1.720000 pos:12384000 size:288000
ret: 0 st:-1 flags:1 ts: 0.624171
ret: 0 st: 0 flags:1 dts: 0.640000 pts: 0.640000 pos:4608000 size:288000
ret: 0 st: 0 flags:0 ts:-0.480000
ret: 0 st: 0 flags:0 ts:-0.481667
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:288000
ret: 0 st: 0 flags:1 ts: 2.400000
ret: 0 st: 0 flags:1 ts: 2.412500
ret: 0 st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:14112000 size:288000
ret: 0 st:-1 flags:0 ts: 1.306672
ret: 0 st: 0 flags:1 dts: 1.320000 pts: 1.320000 pos:9504000 size:288000
ret: 0 st:-1 flags:1 ts: 0.200839
ret: 0 st: 0 flags:1 dts: 0.200000 pts: 0.200000 pos:1440000 size:288000
ret: 0 st: 0 flags:0 ts:-0.920000
ret: 0 st: 0 flags:0 ts:-0.905000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:288000
ret: 0 st: 0 flags:1 ts: 2.000000
ret: 0 st: 0 flags:1 ts: 1.989167
ret: 0 st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:14112000 size:288000
ret: 0 st:-1 flags:0 ts: 0.883340
ret: 0 st: 0 flags:1 dts: 0.880000 pts: 0.880000 pos:6336000 size:288000
ret: 0 st:-1 flags:1 ts:-0.222493
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0 size:288000
ret: 0 st: 0 flags:0 ts: 2.680000
ret: 0 st: 0 flags:0 ts: 2.671667
ret: 0 st: 0 flags:1 dts: 1.960000 pts: 1.960000 pos:14112000 size:288000
ret: 0 st: 0 flags:1 ts: 1.560000
ret: 0 st: 0 flags:1 ts: 1.565833
ret: 0 st: 0 flags:1 dts: 1.560000 pts: 1.560000 pos:11232000 size:288000
ret: 0 st:-1 flags:0 ts: 0.460008
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos:3456000 size:288000