---
I faced the same issue as the poster in
https://lists.ffmpeg.org/pipermail/ffmpeg-user/2018-March/039038.html
After patch, start_time is correct as well as monotonicity of ts.
doc/demuxers.texi | 6 ++++++
libavformat/isom.h | 1 +
libavformat/mov.c | 4 +++-
3 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/doc/demuxers.texi b/doc/demuxers.texi
index 13fe17ff4f..38734b577f 100644
--- a/doc/demuxers.texi
+++ b/doc/demuxers.texi
@@ -662,6 +662,12 @@ Set mfra timestamps as PTS
Don't use mfra box to set timestamps
@end table
+@item use_tfdt
+For fragmented input, set fragment's starting timestamp to
@code{baseMediaDecodeTime} from the @code{tfdt} box.
+Default is disabled, which will preferentially use the
@code{earliest_presentation_time} from the @code{sidx} box.
+In either case, the timestamp from the @code{mfra} box will be used
if it's available and @code{use_mfra_for} is
+set to pts or dts.
+
@item export_all
Export unrecognized boxes within the @var{udta} box as metadata
entries. The first four
characters of the box type are set as the key. Default is false.
diff --git a/libavformat/isom.h b/libavformat/isom.h
index 5a6d504090..ac1b3f3d56 100644
--- a/libavformat/isom.h
+++ b/libavformat/isom.h
@@ -277,6 +277,7 @@ typedef struct MOVContext {
int moov_retry;
int use_mfra_for;
int has_looked_for_mfra;
+ int use_tfdt;
MOVFragmentIndex frag_index;
int atom_depth;
unsigned int aax_mode; ///< 'aax' file has been detected
diff --git a/libavformat/mov.c b/libavformat/mov.c
index c088c9f515..6c99a67ff5 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -4803,7 +4803,7 @@ static int mov_read_trun(MOVContext *c,
AVIOContext *pb, MOVAtom atom)
dts = frag_stream_info->first_tfra_pts;
av_log(c->fc, AV_LOG_DEBUG, "found mfra time %"PRId64
", using it for dts\n", pts);
- } else if (frag_stream_info->sidx_pts != AV_NOPTS_VALUE) {
+ } else if (frag_stream_info->sidx_pts != AV_NOPTS_VALUE &&
!c->use_tfdt) {
// FIXME: sidx earliest_presentation_time is *PTS*, s.b.
// pts = frag_stream_info->sidx_pts;
dts = frag_stream_info->sidx_pts - sc->time_offset;
@@ -8169,6 +8169,8 @@ static const AVOption mov_options[] = {
FLAGS, "use_mfra_for" },
{"pts", "pts", 0, AV_OPT_TYPE_CONST, {.i64 =
FF_MOV_FLAG_MFRA_PTS}, 0, 0,
FLAGS, "use_mfra_for" },
+ {"use_tfdt", "use tfdt for fragment timestamps",
OFFSET(use_tfdt), AV_OPT_TYPE_BOOL, {.i64 = 0},
+ 0, 1, FLAGS},
{ "export_all", "Export unrecognized metadata entries",
OFFSET(export_all),
AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, .flags = FLAGS },
{ "export_xmp", "Export full XMP metadata", OFFSET(export_xmp),
