Chrome internally uses time accurate to microseconds, which is
implemented per MSE spec (https://www.w3.org/TR/media-source/).
Generate Period@duration with better precision to avoid possible
buffered range gaps in Chrome (possibly other browsers too), which
may lead to other problems like playback stall.
b/74238961
Fixes#368.
Change-Id: I357a0f62b67f75c7ca044bb99ea4e3c8bbb6fecd
SyncPointQueue manages all cue points and returns aligned cue
points to the callers (CueAlignmentHandlers).
CueAlignmentHandler is responsible for aligning cues from different
streams. It uses SyncPointQueue internally to align / synchronize the
cue points.
Issue: #355
Change-Id: I281fecb46a3ca7172d71e7495bdd07b8efdeb283
This is called when reaching end of the file of the media. The duration
of the media is updated.
Fixes#340.
Change-Id: I446f2d341b02125d4a7d8c958bda269b5403cb9c
We have an assert that ensures that the end time is greater than
the start time for any cue. However we never checked that cues
had a non-zero duration when parsing them.
We will throw away cues with a duration of zero (and print a
warning message) as they are not spec compliant.
Closes: #335
Change-Id: I404e8f3a5a8d43eff75a2554db3e38e8d340f421
In the video captured by Android's default camera app, meta box is written as
as Box instead of FullBox specified in the spec.
Closes#319.
Change-Id: I526492fdd505d5929c5161cb1ed1503b724de7e9
Prefer timestamps from Video AdaptationSets if available - this avoids
possible video playback jitters due to gaps.
presentationTimeOffset is not applied to the first period as it may in
negative dts which Chrome does not like: https://crbug.com/398141.
It is safe to apply to subsequent periods as the actual offset applied
takes Period@start into consideration:
offset = Period@start - presentationTimeOffset
The result timestamp with offset applied is close to Period@start, so
it is unlikely to result in a negative dts value.
Closes b/73899306.
Change-Id: If8361f5469610093b3aac6675754536ad7e83c4c
When converting from NAL unit stream to byte stream.
The packager should not assume the parameter sets in the sample is the
same as the parameter sets in sample entry (decoder configuration).
Fixes#327.
Change-Id: I7e84d28a296f4b33db0523cca5eabd62f623e852
Looks like Safari does not like v0 tenc box.
- Use v1 tenc box for cbcs and cens protection_scheme as required by
CENCv3 spec.
- Set crypt_byte_block and skip_byte_block to 0 for full sample
encryption cbcs and cens.
Fixes#326
Change-Id: I5581cd856fffc4ff104d950f3ca19b9337d57a78
Create a StreamDescriptor class that can be used to build the stream
descriptor command line argument.
Change-Id: Ifcba4f37d69a1a36c4add51a2a10c3f0c8b2ccd7
The old vtt sample data has the header as "WEBVTT FILE" which does
not reflect what the spec says it should be.
This changes it to "WEBVTT" as described in the WebVTT spec.
Change-Id: Ib54396a8b937501a835dafe966bf05b95b0b22c4
When a gap is found in the text stream, the WebVtt to Mp4 converter will
now output the special empty vtt cue.
Change-Id: I8be88c6b7589aa120a2215e1e4b8e98031fe326d
Closes: #324
- Add empty lines between different types of renditions to improve
readability.
- Group variants with the same audio/text group together, as it is
where the Adaptation occurs.
- Write master playlist after writing media playlists. This makes
more sense and it is also necessary to have the bandwidth of
the last iframe playist segment correctly computed.
- For fMP4, I-Frame segment must include the 'moof' header.
- Fix a problem that hls_iframe_playlist_name is not passed to
MuxerListenerFactory.
Issue: #287
Change-Id: Icf37c5de1dc29f85ae3f419cbc3264d04ca491a4
Adding all the code needed to allow the webvtt to mp4 converter to
send empty vtt cues. This change does everything except writing the
mp4 box.
Bug: #324
Change-Id: I16188e6357632b2ed06f7e9bab7844f093266696
Instead of always tracking segments with an index, this change makes a struct
that will act as the segment and track which segments are in it. Each
segment will store all the samples in the order they were given, it will
avoid any sorting.
Closes: 72867775
Change-Id: Ic5829161510fe8f3320d960c3bc4a276c26ff3be
Create WebVtt test that shows that the current implementation of the
webvtt segmenter does not respect the input order of cues.
Bug: 72867775
Change-Id: I811b3a93c10650e0cf9290c9c0c1680f562deb30
Took the same logic for DEFAULT and AUTOSELECT used by audio and
applied it to text. Combined the build tag logic for audio and
text as they were the same expect for a couple fields.
Bug: #205
Change-Id: I75ecbf4b25cd559b826982d12a5b132e70b83b69
The master playlist and media playlist did not have implementations
for handling text streams. This change adds support for both.
Bug: #205
Change-Id: I1329b8cc2585f15b89959071db9dd16d35847cba
If no hls group name is given, we would default to "audio" but as
we are working to support text, this won't make sense to see
GROUP="audio" on a text stream.
Instead default to "default-audio-group" for audio streams. A specific
text default will be added later.
Bug: #205
Change-Id: Iefc8bfd35708286619d0004348294d98f2c38482
In the master play list, use a class called variant to build
the video tags.
The variant list will always have one entry. In the case that there
are no audio streams, the variant list will have a null entry.
Bug: #205
Change-Id: I6e4acd83a31cd267c173e4f4c910f93781fe6efd
According to the HLS+WebVTT spec, if there is no text in a segment
a webvtt file with no cues can be added to the manifest. By outputting
empty segments it allows the accumulated duration in the Master Playlist
to better represent the duration of the text stream.
Spec Reference: //tools.ietf.org/html/draft-pantos-http-live-streaming-23
Section 3.5. WebVTT
Bug: #205
Change-Id: I5de01200fd9fa99c57949c773e8ee926b0f6ba8a
It was the same code to make the media playlists for each test, so this
change moves that logic into common functions.
Change-Id: Ifb8680247ad4335332251815a2db5d56d28151aa
KongQun Yang
Aaron Vaage