Instead, the actual earliest presentation time is used except for
the first segment if there is an offset between presentation time
(pts) and decoding time (dts).
Chrome (as of v66) reports dts instead of pts in buffered ranges in
MSE API. To avoid breaking Chrome, the earliest_presentation_time
of the first segment is set to its dts as Chrome does not like negative
values for
adjusted dts = dts + Period@start (0 for the first period)
- presentationTimeOffset (earliest_presentation_time).
Fixes#303.
Change-Id: I5ca80e05d5570961400499436f2bcc01f06e69e0
The WebVtt Output Handler did not recognize cue events. This change
allows the handler to accept the events and tell muxer listener
about them.
Issue #362
Change-Id: I7c3318b72e539adc19af587c8e213fdb0af8290b
Created a media handler to come after parsers that will handle filling
in gaps between text samples. The padder takes a min duration, and if
the samples do not cover the min duration when flushed, one last empty
sample will be injected so that the samples will go up to the min duration.
Change-Id: I88605059664d09279676edac418ff3d4990d7556
Updated TextChunker to handle incoming CueEvents. Connecting the
text chunker with the cue alignment handler will happen in a later
CL.
Issue: #362
Change-Id: Ib1fa9f457cf4ec0ce413dadcfa7eed5895ecd628
Move the webvtt segmenter to the chunking directory so that it
can be converted to a general purpose text chunker.
Change-Id: I9ecd7ee39cb73070dab07b64f65ef24af1404813
Now that we have the end-to-end tests, we no longer need the webvtt pipeline
tests to verify that it is working.
Change-Id: I4ebec34e66eda67c40999d8802b447e2551e1fa6
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
This change has the hls master playlist add the text codec string
to the list of codecs in a variant.
Bug: 72942756
Change-Id: Ib25bb2064a291d10d7b1d261a4307991df62220c
Created end-to-end tests for the segmented webvtt text in HLS. The
text stream is longer than both audio and video, so there are more
text segments than video/audio.
Change-Id: Ib860ccd3f2ac0048983fdeebe3847a0b9dcbc160
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
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
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
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
- Removed SetError, Swap, Matches functions, which are not used
- Added moveable version of Update function
- Added VLOG(1) warning in Status for non-ok status
- Replaced OS_WIN with _WIN32 as OS_WIN may not have been defined.
Change-Id: Ib6b7aab6e6fee270937b150f1e4bf993e914a568
The IV was incorrectly updated across samples.
Created a new cryptor SampleAesEc3Cryptor specially for SAMPLE-AES
EC3 encryption / decryption. The new cryptor uses constant-iv, and
makes sure the IV is reset to the initial value at the beginning
of each audio frame and chained across syncframes within the the
audio frame.
Also added E-AC3 end to end test.
Fixes#279
Change-Id: I0aa60c17836daeef5ba433a05e5ff0906191d9ac
KongQun Yang
Aaron Vaage
Haoming Chen