Anton Khirnov:
> The 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 granular enough to
> handle all supported DV framerates.
>
> The seek tests change slightly because the new timebase is more
> granular.
> ---
> libavformat/dv.c | 16 ++++++++++++----
> tests/ref/seek/lavf-dv | 30 +++++++++++++++---------------
> tests/ref/seek/vsynth_lena-dv | 24 ++++++++++++------------
> tests/ref/seek/vsynth_lena-dv-411 | 24 ++++++++++++------------
> tests/ref/seek/vsynth_lena-dv-50 | 24 ++++++++++++------------
> 5 files changed, 63 insertions(+), 55 deletions(-)
>
> diff --git a/libavformat/dv.c b/libavformat/dv.c
> index ffed1a7a90..e2f7a6d313 100644
> --- a/libavformat/dv.c
> +++ b/libavformat/dv.c
> @@ -69,6 +69,8 @@ struct DVDemuxContext {
> uint8_t audio_buf[4][8192];
> int ach;
> int frames;
> +
> + int64_t next_pts;
> };
>
> 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);
This will now set the avg_frame_rate to 60000fps. Obviously wrong.
Anyway, this field should probably not be set for every frame.
>
> /* 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, 60000);
> +
> /* 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;
> + pkt->duration = av_rescale_q(1, c->sys->time_base,
> c->vst->time_base);
> +
> + c->next_pts += pkt->duration;
> }
>
> c->frames++;
> @@ -477,11 +482,12 @@ static int64_t dv_frame_offset(AVFormatContext *s,
> DVDemuxContext *c,
> // 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;
> @@ -494,6 +500,8 @@ static int64_t dv_frame_offset(AVFormatContext *s,
> DVDemuxContext *c,
> void ff_dv_offset_reset(DVDemuxContext *c, int64_t frame_offset)
> {
> c->frames = frame_offset;
> + if (c->sys)
> + c->next_pts = av_rescale_q(frame_offset, c->sys->time_base,
> c->vst->time_base);
> c->audio_pkt[0].size = c->audio_pkt[1].size = 0;
> c->audio_pkt[2].size = c->audio_pkt[3].size = 0;
> }
> diff --git a/tests/ref/seek/lavf-dv b/tests/ref/seek/lavf-dv
> index f63e4460be..356f05546b 100644
> --- a/tests/ref/seek/lavf-dv
> +++ b/tests/ref/seek/lavf-dv
> @@ -3,50 +3,50 @@ 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
> +ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0
> size:144000
This is IMO more than "slightly".
> ret: 0 st: 1 flags:1 ts: 1.480000
> -ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos:3456000
> size:144000
> +ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0
> size:144000
> 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
> ret: 0 st: 1 flags:1 ts: 2.840000
> -ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos:3456000
> size:144000
> +ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0
> size:144000
> 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
> +ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0
> size:144000
> ret: 0 st: 1 flags:1 ts: 0.200000
> -ret: 0 st: 0 flags:1 dts: 0.200000 pts: 0.200000 pos: 720000
> size:144000
> +ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0
> size:144000
> 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
> +ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0
> size:144000
> ret: 0 st: 1 flags:1 ts: 1.560000
> -ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos:3456000
> size:144000
> +ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 0
> 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
> ret: 0 st:-1 flags:1 ts:-0.645825
> diff --git a/tests/ref/seek/vsynth_lena-dv b/tests/ref/seek/vsynth_lena-dv
> index d318794157..afed1fbe72 100644
> --- a/tests/ref/seek/vsynth_lena-dv
> +++ b/tests/ref/seek/vsynth_lena-dv
> @@ -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
> diff --git a/tests/ref/seek/vsynth_lena-dv-411
> b/tests/ref/seek/vsynth_lena-dv-411
> index d318794157..afed1fbe72 100644
> --- a/tests/ref/seek/vsynth_lena-dv-411
> +++ b/tests/ref/seek/vsynth_lena-dv-411
> @@ -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
> diff --git a/tests/ref/seek/vsynth_lena-dv-50
> b/tests/ref/seek/vsynth_lena-dv-50
> index fae6d1b225..3b1d69ffa6 100644
> --- a/tests/ref/seek/vsynth_lena-dv-50
> +++ b/tests/ref/seek/vsynth_lena-dv-50
> @@ -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
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