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Workarounds TS contents with dts moving backwards

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Negative duration is not allowed, so set the duration of that sample to
an arbitrary small value in case it is needed to decode future samples.

Issue #451.

Change-Id: I9250d71d163f769ea2657d56e108b6dbd583de67
This commit is contained in:
KongQun Yang 2018-08-22 13:34:48 -07:00
parent e071710fa9
commit 33792ca2da
1 changed files with 14 additions and 4 deletions
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18
packager/media/formats/mp2t/es_parser_h26x.cc
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@ -304,10 +304,20 @@ bool EsParserH26x::EmitFrame(int64_t access_unit_pos,
media_sample->set_dts(current_timing_desc.dts);
media_sample->set_pts(current_timing_desc.pts);
if (pending_sample_) {
DCHECK_GT(media_sample->dts(), pending_sample_->dts());
pending_sample_duration_ = media_sample->dts() - pending_sample_->dts();
pending_sample_->set_duration(pending_sample_duration_);
emit_sample_cb_.Run(pid(), pending_sample_);
if (media_sample->dts() <= pending_sample_->dts()) {
LOG(WARNING) << "[MPEG-2 TS] PID " << pid() << " dts "
<< media_sample->dts()
<< " less than or equal to previous dts "
<< pending_sample_->dts();
// Keep the sample but adjust the sample duration to a very small value,
// in case that the sample is still needed for the decoding afterwards.
const int64_t kArbitrarySmallDuration = 0.001 * kMpeg2Timescale; // 1ms.
pending_sample_->set_duration(kArbitrarySmallDuration);
} else {
pending_sample_duration_ = media_sample->dts() - pending_sample_->dts();
pending_sample_->set_duration(pending_sample_duration_);
}
emit_sample_cb_.Run(pid(), std::move(pending_sample_));
}
pending_sample_ = media_sample;