From 6e77ff3deaa6e0ac04fb4e51dba1d4a0e69e9d5d Mon Sep 17 00:00:00 2001
From: Dale Curtis <dalecurtis@chromium.org>
Date: Mon, 17 Jul 2017 17:38:09 -0700
Subject: [PATCH] Fix trampling of ctts during seeks when sidx support is
 enabled.

When sidx box support is enabled, the code will skip reading all
trun boxes (each containing ctts entries for samples inthat box).

If seeks are attempted before all ctts values are known, the old
code would dump ctts entries into the wrong location. These are
then used to compute pts values which leads to out of order and
incorrectly timestamped packets.

This patch fixes ctts processing by always using the index returned
by av_add_index_entry() as the ctts_data index. When the index gains
new entries old values are reshuffled as appropriate.

This approach makes sense since the mov demuxer is already relying
on the mapping of AVIndex entries to samples for correct demuxing.

As a result of this all ctts entries are now 1-count. A followup
change will be submitted to remove support for > 1 count entries
which will simplify seeking.

Notes for future improvement:
Probably there are other boxes (stts, stsc, etc) that are impacted
by this issue... this patch only attempts to fix ctts since it
completely breaks packet timestamping.

This patch continues using an array for the ctts data, which is not
the most ideal given the rearrangement that needs to happen (via
memmove as new entries are read in). Ideally AVIndex and the ctts
data would be set-type structures so addition is always worst case
O(lg(n)) instead of the O(n^2) that exists now; this slowdown is
noticeable during seeks.

Signed-off-by: Dale Curtis <dalecurtis@chromium.org>
---
 libavformat/isom.h       |   1 +
 libavformat/mov.c        |  79 ++++++++++++++++++----------
 tests/fate/seek.mak      |   3 ++
 tests/ref/seek/extra-mp4 | 134 +++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 189 insertions(+), 28 deletions(-)
 create mode 100644 tests/ref/seek/extra-mp4

diff --git a/libavformat/isom.h b/libavformat/isom.h
index ff009b0896..fdd98c28f5 100644
--- a/libavformat/isom.h
+++ b/libavformat/isom.h
@@ -137,6 +137,7 @@ typedef struct MOVStreamContext {
     unsigned int stts_count;
     MOVStts *stts_data;
     unsigned int ctts_count;
+    unsigned int ctts_allocated_size;
     MOVStts *ctts_data;
     unsigned int stsc_count;
     MOVStsc *stsc_data;
diff --git a/libavformat/mov.c b/libavformat/mov.c
index 63f84be782..85377f39a9 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -74,6 +74,8 @@ typedef struct MOVParseTableEntry {
 
 static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom);
 static int mov_read_mfra(MOVContext *c, AVIOContext *f);
+static int64_t add_ctts_entry(MOVStts** ctts_data, unsigned int* ctts_count, unsigned int* allocated_size,
+                              int count, int duration);
 
 static int mov_metadata_track_or_disc_number(MOVContext *c, AVIOContext *pb,
                                              unsigned len, const char *key)
@@ -2708,7 +2710,7 @@ static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
 {
     AVStream *st;
     MOVStreamContext *sc;
-    unsigned int i, entries, ctts_count = 0;
+    unsigned int i, j, entries, ctts_count = 0;
 
     if (c->fc->nb_streams < 1)
         return 0;
@@ -2726,7 +2728,7 @@ static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     if (entries >= UINT_MAX / sizeof(*sc->ctts_data))
         return AVERROR_INVALIDDATA;
     av_freep(&sc->ctts_data);
-    sc->ctts_data = av_realloc(NULL, entries * sizeof(*sc->ctts_data));
+    sc->ctts_data = av_fast_realloc(NULL, &sc->ctts_allocated_size, entries * sizeof(*sc->ctts_data));
     if (!sc->ctts_data)
         return AVERROR(ENOMEM);
 
@@ -2741,9 +2743,9 @@ static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom)
             continue;
         }
 
-        sc->ctts_data[ctts_count].count    = count;
-        sc->ctts_data[ctts_count].duration = duration;
-        ctts_count++;
+        /* Expand entries such that we have a 1-1 mapping with samples. */
+        for (j = 0; j < count; j++)
+            add_ctts_entry(&sc->ctts_data, &ctts_count, &sc->ctts_allocated_size, 1, duration);
 
         av_log(c->fc, AV_LOG_TRACE, "count=%d, duration=%d\n",
                 count, duration);
@@ -3046,7 +3048,6 @@ static void mov_fix_index(MOVContext *mov, AVStream *st)
     int64_t index;
     int64_t index_ctts_count;
     int flags;
-    unsigned int ctts_allocated_size = 0;
     int64_t start_dts = 0;
     int64_t edit_list_media_time_dts = 0;
     int64_t edit_list_start_encountered = 0;
@@ -3081,6 +3082,7 @@ static void mov_fix_index(MOVContext *mov, AVStream *st)
     msc->ctts_count = 0;
     msc->ctts_index = 0;
     msc->ctts_sample = 0;
+    msc->ctts_allocated_size = 0;
 
     // If the dts_shift is positive (in case of negative ctts values in mov),
     // then negate the DTS by dts_shift
@@ -3190,7 +3192,7 @@ static void mov_fix_index(MOVContext *mov, AVStream *st)
                 ctts_sample_old++;
                 if (ctts_sample_old == ctts_data_old[ctts_index_old].count) {
                     if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count,
-                                       &ctts_allocated_size,
+                                       &msc->ctts_allocated_size,
                                        ctts_data_old[ctts_index_old].count - edit_list_start_ctts_sample,
                                        ctts_data_old[ctts_index_old].duration) == -1) {
                         av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n",
@@ -3289,7 +3291,7 @@ static void mov_fix_index(MOVContext *mov, AVStream *st)
 
                 if (ctts_data_old && ctts_sample_old != 0) {
                     if (add_ctts_entry(&msc->ctts_data, &msc->ctts_count,
-                                       &ctts_allocated_size,
+                                       &msc->ctts_allocated_size,
                                        ctts_sample_old - edit_list_start_ctts_sample,
                                        ctts_data_old[ctts_index_old].duration) == -1) {
                         av_log(mov->fc, AV_LOG_ERROR, "Cannot add CTTS entry %"PRId64" - {%"PRId64", %d}\n",
@@ -4259,7 +4261,7 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     int64_t dts;
     int data_offset = 0;
     unsigned entries, first_sample_flags = frag->flags;
-    int flags, distance, i, err;
+    int flags, distance, i;
 
     for (i = 0; i < c->fc->nb_streams; i++) {
         if (c->fc->streams[i]->id == frag->track_id) {
@@ -4287,21 +4289,20 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     if (!sc->ctts_count && sc->sample_count)
     {
         /* Complement ctts table if moov atom doesn't have ctts atom. */
-        ctts_data = av_realloc(NULL, sizeof(*sc->ctts_data));
+        ctts_data = av_fast_realloc(NULL, &sc->ctts_allocated_size, sizeof(*sc->ctts_data) * sc->sample_count);
         if (!ctts_data)
             return AVERROR(ENOMEM);
+        /* Don't use a count greater than 1 here since it will leave a gap in
+         * the ctts index which the code below relies on being sequential. */
         sc->ctts_data = ctts_data;
-        sc->ctts_data[sc->ctts_count].count = sc->sample_count;
-        sc->ctts_data[sc->ctts_count].duration = 0;
-        sc->ctts_count++;
+        for (i = 0; i < sc->sample_count; i++) {
+            sc->ctts_data[sc->ctts_count].count = 1;
+            sc->ctts_data[sc->ctts_count].duration = 0;
+            sc->ctts_count++;
+        }
     }
     if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
         return AVERROR_INVALIDDATA;
-    if ((err = av_reallocp_array(&sc->ctts_data, entries + sc->ctts_count,
-                                 sizeof(*sc->ctts_data))) < 0) {
-        sc->ctts_count = 0;
-        return err;
-    }
     if (flags & MOV_TRUN_DATA_OFFSET)        data_offset        = avio_rb32(pb);
     if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) first_sample_flags = avio_rb32(pb);
     dts    = sc->track_end - sc->time_offset;
@@ -4312,26 +4313,28 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
         unsigned sample_size = frag->size;
         int sample_flags = i ? frag->flags : first_sample_flags;
         unsigned sample_duration = frag->duration;
+        unsigned ctts_duration = 0;
         int keyframe = 0;
+        int ctts_index = 0;
+        int old_nb_index_entries = st->nb_index_entries;
 
         if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(pb);
         if (flags & MOV_TRUN_SAMPLE_SIZE)     sample_size     = avio_rb32(pb);
         if (flags & MOV_TRUN_SAMPLE_FLAGS)    sample_flags    = avio_rb32(pb);
-        sc->ctts_data[sc->ctts_count].count = 1;
-        sc->ctts_data[sc->ctts_count].duration = (flags & MOV_TRUN_SAMPLE_CTS) ?
-                                                  avio_rb32(pb) : 0;
-        mov_update_dts_shift(sc, sc->ctts_data[sc->ctts_count].duration);
+        if (flags & MOV_TRUN_SAMPLE_CTS)      ctts_duration   = avio_rb32(pb);
+
+        mov_update_dts_shift(sc, ctts_duration);
         if (frag->time != AV_NOPTS_VALUE) {
             if (c->use_mfra_for == FF_MOV_FLAG_MFRA_PTS) {
                 int64_t pts = frag->time;
                 av_log(c->fc, AV_LOG_DEBUG, "found frag time %"PRId64
                         " sc->dts_shift %d ctts.duration %d"
                         " sc->time_offset %"PRId64" flags & MOV_TRUN_SAMPLE_CTS %d\n", pts,
-                        sc->dts_shift, sc->ctts_data[sc->ctts_count].duration,
+                        sc->dts_shift, ctts_duration,
                         sc->time_offset, flags & MOV_TRUN_SAMPLE_CTS);
                 dts = pts - sc->dts_shift;
                 if (flags & MOV_TRUN_SAMPLE_CTS) {
-                    dts -= sc->ctts_data[sc->ctts_count].duration;
+                    dts -= ctts_duration;
                 } else {
                     dts -= sc->time_offset;
                 }
@@ -4343,7 +4346,7 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
             }
             frag->time = AV_NOPTS_VALUE;
         }
-        sc->ctts_count++;
+
         if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
             keyframe = 1;
         else
@@ -4352,11 +4355,31 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
                                   MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES));
         if (keyframe)
             distance = 0;
-        err = av_add_index_entry(st, offset, dts, sample_size, distance,
-                                 keyframe ? AVINDEX_KEYFRAME : 0);
-        if (err < 0) {
+        ctts_index = av_add_index_entry(st, offset, dts, sample_size, distance,
+                                        keyframe ? AVINDEX_KEYFRAME : 0);
+        if (ctts_index >= 0 && old_nb_index_entries < st->nb_index_entries) {
+            unsigned int size_needed = st->nb_index_entries * sizeof(*sc->ctts_data);
+            unsigned int request_size = size_needed > sc->ctts_allocated_size ?
+                FFMAX(size_needed, 2 * sc->ctts_allocated_size) : size_needed;
+            ctts_data = av_fast_realloc(sc->ctts_data, &sc->ctts_allocated_size, request_size);
+            if (!ctts_data) {
+                av_freep(&sc->ctts_data);
+                return AVERROR(ENOMEM);
+            }
+
+            sc->ctts_data = ctts_data;
+            if (ctts_index != old_nb_index_entries) {
+                memmove(sc->ctts_data + ctts_index + 1, sc->ctts_data + ctts_index,
+                        sizeof(*sc->ctts_data) * (sc->ctts_count - ctts_index));
+            }
+
+            sc->ctts_data[ctts_index].count = 1;
+            sc->ctts_data[ctts_index].duration = ctts_duration;
+            sc->ctts_count++;
+        } else {
             av_log(c->fc, AV_LOG_ERROR, "Failed to add index entry\n");
         }
+
         av_log(c->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %u, offset %"PRIx64", dts %"PRId64", "
                 "size %u, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
                 offset, dts, sample_size, distance, keyframe);
diff --git a/tests/fate/seek.mak b/tests/fate/seek.mak
index f835da5226..1a6e584987 100644
--- a/tests/fate/seek.mak
+++ b/tests/fate/seek.mak
@@ -248,7 +248,10 @@ FATE_SEEK += $(FATE_SEEK_LAVF-yes:%=fate-seek-lavf-%)
 FATE_SEEK_EXTRA-$(CONFIG_MP3_DEMUXER)   += fate-seek-extra-mp3
 FATE_SEEK_EXTRA-$(call ALLYES, CACHE_PROTOCOL PIPE_PROTOCOL MP3_DEMUXER) += fate-seek-cache-pipe
 FATE_SEEK_EXTRA-$(CONFIG_MATROSKA_DEMUXER) += fate-seek-mkv-codec-delay
+FATE_SEEK_EXTRA-$(CONFIG_MOV_DEMUXER) += fate-seek-extra-mp4
+
 fate-seek-extra-mp3:  CMD = run libavformat/tests/seek$(EXESUF) $(TARGET_SAMPLES)/gapless/gapless.mp3 -fastseek 1
+fate-seek-extra-mp4:  CMD = run libavformat/tests/seek$(EXESUF) $(TARGET_SAMPLES)/mov/buck480p30_na.mp4 -duration 180 -frames 4
 fate-seek-cache-pipe: CMD = cat $(TARGET_SAMPLES)/gapless/gapless.mp3 | run libavformat/tests/seek$(EXESUF) cache:pipe:0 -read_ahead_limit -1
 fate-seek-mkv-codec-delay:   CMD = run libavformat/tests/seek$(EXESUF) $(TARGET_SAMPLES)/mkv/codec_delay_opus.mkv
 
diff --git a/tests/ref/seek/extra-mp4 b/tests/ref/seek/extra-mp4
new file mode 100644
index 0000000000..c25544c095
--- /dev/null
+++ b/tests/ref/seek/extra-mp4
@@ -0,0 +1,134 @@
+ret: 0         st: 0 flags:1 dts:-0.033333 pts: 0.000000 pos:   1287 size:   183
+ret: 0         st: 0 flags:0 dts: 0.000000 pts: 0.033333 pos:   1470 size:    24
+ret: 0         st: 0 flags:0 dts: 0.033333 pts: 0.066667 pos:   1494 size:  6779
+ret: 0         st: 0 flags:0 dts: 0.066667 pts: 0.100000 pos:   8273 size: 11041
+ret: 0         st:-1 flags:0  ts:-1.000000
+ret: 0         st: 0 flags:1 dts:-0.033333 pts: 0.000000 pos:   1287 size:   183
+ret: 0         st: 0 flags:0 dts: 0.000000 pts: 0.033333 pos:   1470 size:    24
+ret: 0         st: 0 flags:0 dts: 0.033333 pts: 0.066667 pos:   1494 size:  6779
+ret: 0         st: 0 flags:0 dts: 0.066667 pts: 0.100000 pos:   8273 size: 11041
+ret: 0         st:-1 flags:1  ts: 101.894167
+ret: 0         st: 0 flags:1 dts: 101.300000 pts: 101.333333 pos:10982311 size: 67237
+ret: 0         st: 0 flags:0 dts: 101.333333 pts: 101.433333 pos:11049548 size:  3524
+ret: 0         st: 0 flags:0 dts: 101.366667 pts: 101.366667 pos:11053072 size:   562
+ret: 0         st: 0 flags:0 dts: 101.400000 pts: 101.400000 pos:11053634 size:   599
+ret: 0         st: 0 flags:0  ts: 24.788333
+ret: 0         st: 0 flags:1 dts: 25.300000 pts: 25.333333 pos:2607246 size: 40273
+ret: 0         st: 0 flags:0 dts: 25.333333 pts: 25.433333 pos:2647519 size:  2959
+ret: 0         st: 0 flags:0 dts: 25.366667 pts: 25.366667 pos:2650478 size:   197
+ret: 0         st: 0 flags:0 dts: 25.400000 pts: 25.400000 pos:2650675 size:   230
+ret: 0         st: 0 flags:1  ts: 127.682500
+ret: 0         st: 0 flags:1 dts: 126.633333 pts: 126.666667 pos:13359975 size: 68741
+ret: 0         st: 0 flags:0 dts: 126.666667 pts: 126.766667 pos:13428716 size:  2914
+ret: 0         st: 0 flags:0 dts: 126.700000 pts: 126.700000 pos:13431630 size:   781
+ret: 0         st: 0 flags:0 dts: 126.733333 pts: 126.733333 pos:13432411 size:   817
+ret: 0         st:-1 flags:0  ts: 50.576668
+ret: 0         st: 0 flags:1 dts: 50.600000 pts: 50.633333 pos:5858254 size: 67903
+ret: 0         st: 0 flags:0 dts: 50.633333 pts: 50.733333 pos:5926157 size:  1307
+ret: 0         st: 0 flags:0 dts: 50.666667 pts: 50.666667 pos:5927464 size:   150
+ret: 0         st: 0 flags:0 dts: 50.700000 pts: 50.700000 pos:5927614 size:   176
+ret: 0         st:-1 flags:1  ts: 153.470835
+ret: 0         st: 0 flags:1 dts: 153.466667 pts: 153.500000 pos:15867700 size: 96169
+ret: 0         st: 0 flags:0 dts: 153.500000 pts: 153.533333 pos:15963869 size:   785
+ret: 0         st: 0 flags:0 dts: 153.533333 pts: 153.633333 pos:15964654 size:  3135
+ret: 0         st: 0 flags:0 dts: 153.566667 pts: 153.566667 pos:15967789 size:   859
+ret: 0         st: 0 flags:0  ts: 76.365000
+ret: 0         st: 0 flags:1 dts: 77.833333 pts: 77.866667 pos:8659657 size: 41182
+ret: 0         st: 0 flags:0 dts: 77.866667 pts: 77.966667 pos:8700839 size:  4197
+ret: 0         st: 0 flags:0 dts: 77.900000 pts: 77.900000 pos:8705036 size:   653
+ret: 0         st: 0 flags:0 dts: 77.933333 pts: 77.933333 pos:8705689 size:   751
+ret: 0         st: 0 flags:1  ts:-0.740833
+ret: 0         st: 0 flags:1 dts:-0.033333 pts: 0.000000 pos:   1287 size:   183
+ret: 0         st: 0 flags:0 dts: 0.000000 pts: 0.033333 pos:   1470 size:    24
+ret: 0         st: 0 flags:0 dts: 0.033333 pts: 0.066667 pos:   1494 size:  6779
+ret: 0         st: 0 flags:0 dts: 0.066667 pts: 0.100000 pos:   8273 size: 11041
+ret: 0         st:-1 flags:0  ts: 102.153336
+ret: 0         st: 0 flags:1 dts: 104.066667 pts: 104.100000 pos:11116461 size:112929
+ret: 0         st: 0 flags:0 dts: 104.100000 pts: 104.133333 pos:11229390 size:   585
+ret: 0         st: 0 flags:0 dts: 104.133333 pts: 104.166667 pos:11229975 size:   797
+ret: 0         st: 0 flags:0 dts: 104.166667 pts: 104.200000 pos:11230772 size:   810
+ret: 0         st:-1 flags:1  ts: 25.047503
+ret: 0         st: 0 flags:1 dts: 20.233333 pts: 20.266667 pos:2223959 size: 51823
+ret: 0         st: 0 flags:0 dts: 20.266667 pts: 20.300000 pos:2275782 size:   488
+ret: 0         st: 0 flags:0 dts: 20.300000 pts: 20.400000 pos:2276270 size:   670
+ret: 0         st: 0 flags:0 dts: 20.333333 pts: 20.333333 pos:2276940 size:    84
+ret: 0         st: 0 flags:0  ts: 127.941667
+ret: 0         st: 0 flags:1 dts: 131.233333 pts: 131.266667 pos:13727953 size: 62229
+ret: 0         st: 0 flags:0 dts: 131.266667 pts: 131.366667 pos:13790182 size:  2349
+ret: 0         st: 0 flags:0 dts: 131.300000 pts: 131.300000 pos:13792531 size:   571
+ret: 0         st: 0 flags:0 dts: 131.333333 pts: 131.333333 pos:13793102 size:  1190
+ret: 0         st: 0 flags:1  ts: 50.835833
+ret: 0         st: 0 flags:1 dts: 50.600000 pts: 50.633333 pos:5858254 size: 67903
+ret: 0         st: 0 flags:0 dts: 50.633333 pts: 50.733333 pos:5926157 size:  1307
+ret: 0         st: 0 flags:0 dts: 50.666667 pts: 50.666667 pos:5927464 size:   150
+ret: 0         st: 0 flags:0 dts: 50.700000 pts: 50.700000 pos:5927614 size:   176
+ret: 0         st:-1 flags:0  ts: 153.730004
+ret: 0         st: 0 flags:1 dts: 157.033333 pts: 157.066667 pos:16225365 size: 82738
+ret: 0         st: 0 flags:0 dts: 157.066667 pts: 157.166667 pos:16308103 size:  2273
+ret: 0         st: 0 flags:0 dts: 157.100000 pts: 157.100000 pos:16310376 size:   350
+ret: 0         st: 0 flags:0 dts: 157.133333 pts: 157.133333 pos:16310726 size:   337
+ret: 0         st:-1 flags:1  ts: 76.624171
+ret: 0         st: 0 flags:1 dts: 75.966667 pts: 76.000000 pos:8520178 size: 94395
+ret: 0         st: 0 flags:0 dts: 76.000000 pts: 76.100000 pos:8614573 size:   483
+ret: 0         st: 0 flags:0 dts: 76.033333 pts: 76.033333 pos:8615056 size:    37
+ret: 0         st: 0 flags:0 dts: 76.066667 pts: 76.066667 pos:8615093 size:    56
+ret: 0         st: 0 flags:0  ts:-0.481667
+ret: 0         st: 0 flags:1 dts:-0.033333 pts: 0.000000 pos:   1287 size:   183
+ret: 0         st: 0 flags:0 dts: 0.000000 pts: 0.033333 pos:   1470 size:    24
+ret: 0         st: 0 flags:0 dts: 0.033333 pts: 0.066667 pos:   1494 size:  6779
+ret: 0         st: 0 flags:0 dts: 0.066667 pts: 0.100000 pos:   8273 size: 11041
+ret: 0         st: 0 flags:1  ts: 102.412500
+ret: 0         st: 0 flags:1 dts: 101.300000 pts: 101.333333 pos:10982311 size: 67237
+ret: 0         st: 0 flags:0 dts: 101.333333 pts: 101.433333 pos:11049548 size:  3524
+ret: 0         st: 0 flags:0 dts: 101.366667 pts: 101.366667 pos:11053072 size:   562
+ret: 0         st: 0 flags:0 dts: 101.400000 pts: 101.400000 pos:11053634 size:   599
+ret: 0         st:-1 flags:0  ts: 25.306672
+ret: 0         st: 0 flags:1 dts: 27.400000 pts: 27.433333 pos:2674605 size:127383
+ret: 0         st: 0 flags:0 dts: 27.433333 pts: 27.466667 pos:2801988 size:    68
+ret: 0         st: 0 flags:0 dts: 27.466667 pts: 27.500000 pos:2802268 size:  1754
+ret: 0         st: 0 flags:0 dts: 27.500000 pts: 27.533333 pos:2804022 size:  4071
+ret: 0         st:-1 flags:1  ts: 128.200839
+ret: 0         st: 0 flags:1 dts: 127.833333 pts: 127.866667 pos:13514072 size: 67382
+ret: 0         st: 0 flags:0 dts: 127.866667 pts: 127.966667 pos:13581454 size:  2936
+ret: 0         st: 0 flags:0 dts: 127.900000 pts: 127.900000 pos:13584390 size:   451
+ret: 0         st: 0 flags:0 dts: 127.933333 pts: 127.933333 pos:13584841 size:   537
+ret: 0         st: 0 flags:0  ts: 51.095011
+ret: 0         st: 0 flags:1 dts: 52.033333 pts: 52.066667 pos:6028050 size:115809
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+ret: 0         st: 0 flags:0  ts: 102.671678
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+ret: 0         st:-1 flags:0  ts: 128.460008
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+ret: 0         st:-1 flags:1  ts: 51.354175
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-- 
2.14.0.434.g98096fd7a8-goog

