Opening a named pipe can block until both ends are open, and we cannot
control when the other end will be open. Ideally, we would always
open files in a thread so that Packager can be used with piped inputs
from naive applications without a potential deadlock.
This change will defer opening WebVTT files until the parser Run()
method is called from a thread. This way, WebVTT files being sent in
from a pipe will never be able to block the main thread.
Previously, files were opened on the main thread before calling the
parser constructor, passing the open file to the constructor as an
argument. I also tried doing it in the parser's InitializeInternal()
method, but that is also called from the main thread.
Change-Id: I54cc68ed9d48a8dc697829119be84d4065b1ae1c
Under command line flag --mvex_before_trak.
This is needed to workaround Android MediaExtractor bug which
requires |mvex| to appear before |trak|.
Closes#711.
Change-Id: Id41d71af5c0016f59023dda6408bbf502e12ac55
Added --crypt_byte_block, --skip_byte_block to allow users to specify
protection pattern other than 1:9 for pattern based encryption scheme,
e.g. cbcs and cens.
Closes#710.
b/147307451
Change-Id: I9f64a7639170c737f138572689b28d17286325c7
Per https://dashif.org/docs/DASH-IF-IOP-v4.3.pdf 4.4.3.6 Signalling the last segment number in Period, there are three ways to signal the last segment number:
a. Use the lmsg signalling as defined in clause 4.4.3.5.
b. Use the Segment Timeline with @r value greater or equal to 0.
c. Add a Supplemental Descriptor with @schemeIdUri set to http://dashif.org/guidelines/last-segment-number with the @value set to the last segment number.
We do not support (a). This change adds support for (c) when Segment Timeline (b) is not used, i.e. when Representation has constant duration (could be approximate).
Under flag --dash_add_last_segment_number_when_needed (disabled by default).
AV1-ISOBMFF spec is updated recently to use start alignment instead of
end alignment for cbcs:
for the protected scheme cbcs:
- BytesOfProtectedData SHALL start on the first byte and end on the
last byte of the decode_tile structure (including any trailing bits).
- A subsample SHALL be created for each tile, even if its size is less
than 16 bytes.
- ...
cenc protection scheme is not affected.
Closes#698.
Change-Id: Ic83a478fb2602d830c30daf3206a1c2d2c238a08
Remove custom constructors, which is no longer needed with C++11. Use
C++ struct zero initialization instead.
Fixes#686.
Change-Id: I512da9f23a250e8b9ebf8bb8e0a39ad0f822d0d3
Added Dolby Vision backward compatible signalling, i.e. for Dolby Vision
profile 8, both base codec without Dolby Vision and HDR codec with Dolby
Vision are signalled.
This is achieved by using a new MuxerListener implementation
MultiCodecMuxerListener, which wraps multiple child MuxerListeners and
is able to delegate to the child MuxerListeners based on the codecs in
the stream.
Closes#341.
Change-Id: I1967bb1ed503087cdd011c364e5fb5647d516ca4
HLS uses the EXT-X-MEDIA-SEQUENCE tag at the start of a live playlist in
order to specify the first segment sequence number. This is because any
live playlist have a limited number of segments, and they also keep
updating with new segments while removing old ones. When a player refreshes
the playlist, this information is important for keeping track of segments
positions.
When the packager starts, it naturally starts this count from zero. However,
there are many situations where the packager may be restarted, without this
meaning starting this value from zero (but continuing a previous sequence).
The most common situations are problems in the encoder feeding the packager.
With those cases in mind, this parameter allows to set the initial
EXT-X-MEDIA-SEQUENCE value. This way, it's possible to continue the sequence
number from previous packager run.
Closes#691.
Call CRYPTO_library_init to properly initialize crypto engine, which
enables AES-NI (Hardware AES) if it is supported by CPU.
Also added a performance benchmark test.
Closes#198.
Change-Id: I962a2da588d2f4f6cbe00c83ecc9a832db0e6042
Also roll_boringssl.py script is also adjusted to work with latest
boringssl.
Disable ASM compilation on Windows x64 which fails to compile. It also
means there are no HW AES on Windows x64.
Issue #198.
Change-Id: Ib7e8ff506f014c8c733f1882eeeddbe34fa28511
For MP4 files, mp4 parser tries to open and read the same file again
to handle trailing MOOV box.
Open FIFO again may result in packager hang.
Update the code to only attempt to load MOOV for local regular files,
as FIFO and remote files are unseekable anyway.
Fixes#664.
Change-Id: Ib286d2876d202cd5a248ffe70b13589b3cc74bc9
Although FRAME-RATE is optional per HLS specification, but per HLS
Authoring Specification for Apple Devices (https://apple.co/30n90DC):
Each EXT-X-STREAM-INF tag MUST have a FRAME-RATE attribute.
Also, iOS and TVos refuse to play the content if VIDEO-RANGE is
present but FRAME-RATE is missing.
Issue #632, #634.
Change-Id: Ica282f023a7e8538f7b506094e2286840cf5c193
Calculate FRAME-RATE from sample duration as in the DASH solution.
Right now calculated frame-rate may not be accurate in some scenarios,
so we avoid setting the attribute in HLS unless it is more than 30
fps. We will set it unconditionally once it is fixed.
Fixes#634.
Change-Id: I87b6e9a047d959ae88dd4dcb2b4786527ba5c9fc
- Parse and extract transfer_characteristics from H264/H265 VUI
parameters.
- Set VIDEO-RANGE attribute in HLS according to HLS specification:
https://tools.ietf.org/html/draft-pantos-hls-rfc8216bis-02#section-4.4.4.2
- Also added an end to end test.
Fixes#632.
Change-Id: Iadf557d967b42ade321fb0b152e8e7b64fe9ff3e
- Add relevant FOURCCs for Dolby Vision.
- Parse DOVIDecoderConfigurationRecord (dvcC, dvvC) to generate
Dolby Vision codec string.
- Propagate Dolby Vision configs (dvcC, dvvC, hvcE) from Demuxer
to Muxer.
- Add a Dolby Vision end to end test.
Support for backward compatibility signaling in DASH and HLS will be
added in a later CL.
Issue #341
Change-Id: If1385df5f48e04b59cb7661130bea48e26b453bf
Latest version of FFmpeg encodes non standard channel layout, e.g. 5.1(side), in AAC using PCE.
This is now supported with the below changes:
- Allow channel_configuration in ADTS header to be 0, as the cctual channel layout is specified
in PCE.
- Add GetFrameSizeWithoutParsing to determine the frame size before actually parsing the frame.
- Skip and resume later if not the whole frame is available.
- Also ensure that the next frame starts with a proper sync word.
Fixes#598.
Store and use the segment start time in the original time scale to
delete old segments, instead of storing it in seconds, as the segment
file name is generated using the time with the time scale.
Fixes#625.
Change-Id: I7524d597b1ffc081dd1399d6fb3ea47c13502881
- Parses parameter set NAL units in the samples.
- Calculate pixel width and height from track width and height.
Fixes#621, #627.
Change-Id: Ic1e120dccbd220b01168f7bf4effeaa43f95b055
We used to use the target segment duration provided by the user.
Unfortunately that does not work for iframe only playlist which
the target duration is effectively equal to the GOP duration.
In the new approach, we estimate the target duration from the initial
few blocks (10 blocks right now).
Fixes#610.
Change-Id: Ie8bf943e157149ca7ed3b9382fe0a1088d0774e2
Add dash_accessibilities stream descriptor, which is a semi-colon
separated list of accessibility_scheme_id_uri=value. It is optional.
Add dash_roles stream descriptor, which is a semi-colon separated
list of strings. It is optional.
Closes#565.
Change-Id: Idb1c20bb410fdd016db07e11fe507c102a3dd8ea
And also dvhe with dvh1.
Apple's specification does not recommend video formats with the
parameter sets stored in the samples.
It also fails mediastreamvalidator checks and some Apple devices /
platforms refused to play.
See https://apple.co/30n90DC 1.10.
Replaced with the corresponding formats with the parameter sets stored
in the sample descriptions instead.
Fixes#587.
Change-Id: Ic5d3f6fde115b1d09d1dcac32cef5fe0ad246aa0
We have logics in bandwidth calculation to ignore segments that is
smaller than half of target duration. The logic does not have any
effect right now as the target duration in mpd/hls params is always
zero.
This change will set target duration in mpd/hls params, thus it can fix
part of issue #581 as the last segment which is less than half of
target duration.
Issue #581.
Fixes#498.
Change-Id: Ieb2dbf4da9fc72a7b9de802cda4294f1954d29b4
Segment start,end time was used previously, which could result in
problems if there are discontinuity in the streams. E.g. if the
stream has timestamp, 10000, 10001, 10002 and then next segment
comes in with timestamp 1. With the previous logic, all the segments
would remain in the time shift buffer until after 10000 segments
even with a small time shift buffer depth of 10.
This could also happen when timestamp wraps around, which could
happen during long time of live streaming.
This change will also be useful to support multi-period live DASH.
Fixes#563.
Change-Id: Ie078d76c6e4af13ade9ad46191c8e3529069ed4d
This is needed for Dolby Vision as Dolby Vision uses NAL unit type 62
to carry private information.
Issue #341.
Change-Id: Ib3f06d8f36ef3d89c33162dd74c012a0c3a805e5
- Define BaseDescriptor and generic read / write operations.
- Define descriptors: ESDescriptor, DecoderConfigDescriptor,
DecoderSpecificInfoDescriptor, SLConfigDescriptor.
DecoderSpecificInfoDescriptor and all other descriptors can now
handle arbitrary length size, not limiting to 64 byte for
DecoderSpecificInfoDescriptor, which was placed to limit
ESDescriptor length size to one byte.
- Now DecoderConfigDescriptor is able to handle reading and writing
of all fields including buffer_size_db, which was not handled
earlier.
Fixes#536.
Change-Id: Ia8a775f8bf6e90e3343a85f0e643bc44cd017c7a
Addresses binary/str conversion problems like
'can't use a string pattern on a bytes-like object'.
With this change, packager_test.py will work with any version of python
after python2.5.
Fixes#553.
Change-Id: I02066942e4bcdddc1db1daf761abab4cc46169a9
With the update, the script needs to be launched from
out/{Debug,Release} directory.
Also updated docs to make it clear how to use the tool.
Fixes#538.
Change-Id: I37b71afc33e3b73ff5232e43d79c52ffa5859d57
Add crypto_period_seconds to Widevine key request
When using key rotation with Widevine DRM, a key server has to know
the duration of crypto period to relate generated keys to the media
playback time. This helps the server to provide relevant keys to
a client during license request.
Closes#544.
The file deletion could fail if it is still held by the web server.
This CL adds retry logic to retry the deletion.
Closes#533.
Change-Id: Ib42ed8db11f32897a29e3b58c1be89d05f5dd034
VLC seems to generate access units with extra AUDs. In #526, the below
sequence is seen:
AUD | SPS | PPS | SPS | PPS | AUD | SEI | SEI | SEI | IDR_SLICE
Previously we exit early when seeing AUD, which results in delayed
processing of the access unit.
The behavior is changed to continue processing the following NAL units
to workaround the content issue.
Closes#526.
Change-Id: I80f571c0711c6db1337eb393fce36fae5432b6c5
Generate an audio only master playlist if there are no videos and
subtitles.
We do not support mixing audio only EXT-X-STREAM-INF with video
EXT-X-STREAM-INF right now.
Fixes#461.
Change-Id: I999b335ad7abbe183ffcb0f5d471948977c2772f
The new directory permission is set to the permission of the last
existing directory in the file path. If none of the directory exists,
it is default to 0755.
Previously we use base::CreateDirectoryAndGetError(), which always sets
the new directory permission to 0700, which is not what we want.
Fixes#499.
Change-Id: Iee9429d5e63ada9588f74ff20d3cce28a1a6437b
It allows users to override the default language for text tracks.
If not specified, --default_language applies to both audio and text
tracks.
Issue #430.
Change-Id: I86a9baba2072be27b6661fa7b65a8bc8b6adb3cc
Add hls_characteristics stream descriptor, which is a colon or semi-colon
separated list of strings. It is optional.
Fixes#430.
Change-Id: Ifcf79316e68768ff065891933de565cd0ff32ec4
https://tools.ietf.org/html/rfc8216#section-4.1
The peak segment bit rate of a Media Playlist is the largest bit rate
of any contiguous set of segments whose total duration is between 0.5
and 1.5 times the target duration.
Fixes#498.
Change-Id: I1f28972b9cc5977735e47906bdcd88ba3942db5a
kFrameSizeCodeTable rows are ordered by 32kHz, 44.1kHz and 48kHz,
which is the reverse of fscod (48kHz, 44.1kHz and 32kHz).
Also updated unittests.
Fixes#487.
Change-Id: Icb0afb8bb895afde0028eee05b403bc85bf7b538
Dump the first 512 bytes of the buffer if container is unknown. This
can help us find out what the actual container is; and fix the
container detection bug if there is.
Closes#505.
Change-Id: I4a8fe5954d0419ef2ccbb9067ec2e9ffe1da417e
Created SubsampleGenerator to generate subsamples.
This is part of the EncryptionHandler clean up to make it more modular
and testable.
Change-Id: I6f4076b057027c72335beb3cbf1965341eb18031
Created EncryptorFactory to set up the encryptors.
This is part of the EncryptionHandler clean up to make it more modular
and testable.
Change-Id: I839bcd8a84fa873396360d67afb540fef1345673
Only Marlin Adaptive Streaming Specification – Simple Profile is
supported.
Two additional updates:
- Remove FairPlay ContentProtection element from DASH mpd as FairPlay
does not define a signaling in DASH.
- Updated end to end test to include all DRMs we support.
Closes#381.
Change-Id: Id12269b471ea34983b782cbd92f687332292ef59
Implemented according to bitstream spec at
https://aomediacodec.github.io/av1-spec/.
It will be used to do AV1 subsample encryption later.
Issue #453.
Change-Id: I84d8a2a780d95f2c9f430ee598838b97474cc0af
This was introduced earlier to indicate FairPlay protection system. But
in fact, it is sufficient to just use the system id for the indication.
- Also updated various parts of the pipeline to support empty PSSH.
- Added an additional FairPlay end to end test using fMP4.
Change-Id: Ica48b7b5235e9a2b5a7f722bcd0fc1ef2073ac13
Note that TTML in ISO-BMFF is not supported yet.
Also updated packager_test.py:
- Added a test using TTML passthrough.
- Computed output extension from input extension unless output_format
is specified.
Fixes#478.
Change-Id: Ia917fc4ed3c326782791ed67601fba02ea28b11d
The time for the previous segment was used when generating the segment
name. This resulted in the first segment being overwritten and
mismatching manifest and media files. It led to playback problems.
Issue #472.
Change-Id: Ia8130ce261585e1a2ede83b26de3e32508de087f
The VP9 level is computed when the container is missing a codec config
or if the level is missing from the codec config.
This fixes VP9 in ISO-BMFF files generated by FFmpeg v4.0.2 or earlier
which does not have level set in the codec config.
Fixes#469.
Change-Id: I685bfd48be16ee6b2209da1c3173f7d6bb02b36a
Implemented per AV1 Codec ISO Media File Format Binding at
https://aomediacodec.github.io/av1-isobmff/
And AOM AV1 codec mapping in Matroska/WebM at
https://github.com/Matroska-Org/matroska-specification/blob/av1-mappin/codec/av1.md
Note that AV1 specific boxes are not supported in this CL, i.e.
AV1 Forward Key Frame sample group entry 'av1f', AV1 Multi-Frame
sample group entry 'av1m' etc are not supported. These boxes are optional.
We will add support later if they are useful to the clients / players.
Encryption is not supported yet.
Issue #453.
Change-Id: I630432d0a9bf82d263ffaf40e57f67fc65eee902
We used to skip all the remaining bytes if the size is less than
|crypt_byte_block| blocks.
This interpretation is incorrect. We should only leave the last partial
16-byte block un-encrypted.
Change-Id: I4f09600efa52e2fdf4d0b661dfc418dcb675f9f6
Renamed "FakeMediaHandler" to "CachingMediaHandler" so that it
is easier to differentiate from "FakeInputMediaHandler". It will
be used as the single method to verify media handler output.
This is part of an effort to find a cleaner way to test media handlers.
Change-Id: Ie391fe23ee3389d13b012ae3093744a453106c19
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
Keep bundled binutil scripts but not downloading actual binaries by default.
Automatic downloading of binutils has been causing problems for some users:
see #164, #412, #440.
Using bundled binutils helps reduce linking time, but packager codebase is
relatively small, so the gain is not significant.
Local testing shows that the full build time increases from 1m42s to 1m50s, i.e.
an increase of about 8s, or ~8%.
User can still enable the usage of bundled binutils by running
'python src/packager/third_party/binutils/download.py' and set
'linux_use_bundled_binutils' and 'linux_use_bundled_gold' to 1 in GYP_DEFINES.
Change-Id: I7ecae2333861f41054f957d0a6081dae948167bd
Note that STYLE and REGION are not supported in mp4 container due to
spec limitation as 14496-30:2014 does not specify a way to signal
styles/regions inside mp4.
Closes#344.
Change-Id: I05c14df916f7b2c7ca4364ee9407e0eda4dc7a3f
- Also fixed compilations in Alpine Linux and other flavors of Linux.
- Added container versions in docker files to always use a verified
version.
Closes#164.
Change-Id: I949a8709e4d70c49129c9c2e8608dd78193d964c
Configurable under --enable_legacy_widevine_hls_signaling, off by
default.
When it is enabled, do not fail if provider or content_id are missing,
but log a warning instead.
Bug: 112268769.
Change-Id: I2531aa7474d2818700b90fa0679b49891bb935ef
--io_block_size determines the buffer size for each read/write in
ThreadedIO.
A big io_block_size does not help much as long as --io_cache_size
is big enough.
Instead, it may cause problems. For example, Linux pipes block until
reading io_block_size number of bytes, which causes a large delay
when reading audio streams.
Change-Id: I5bdd3d61388579c7e8647cdab3152135a40a752b
In some ISO-BMFF files, there is an initial non-zero composition offset,
but there is no EditList present.
This is against ISO-BMFF spec recommentation [1] and we believe in most
cases it is just missing the EditList.
[1] 14496-12:2015 8.6.6.1
It is recommended that such an edit be used to establish a presentation
time of 0 for the first presented sample, when composition offsets are
used.
Issue: #112.
Change-Id: I178d5ec9d8c294c9f70aac4f4dd6254c824e2255
Previously it is possible that the same file path is generated when
the function is called consecutively in the same thread.
The problem can be re-produced in Windows. Does not seem to be
re-producible in Linux and Mac.
Fixes#448, #449.
Change-Id: Ia0163492e3494eba00f56f4d356aa1010b9660cc
- Also make it explicit that MemoryFile does not support opening an
already open file. An error will be returned when trying to open an
already open file. Previously the code may crash with memory problems.
- Also updated packager_test to use different test directories for
different tests.
Fixes Appveyor crash due to memory corruption: #449.
Appveyor may still fail but will contain a meaningful error logging.
Change-Id: Ibc9346ef7f301e416a4a09f120bca56504c939d8
This also ensures that it does not violate std::sort() requirement on
strict ordering, which is enforced in gcc/g++ though not in clang.
std::sort() strict ordering requirement:
std::sort() need a comparator that return true iff the first argument is
strictly lower than the second one. That is: must return false when they
are equal.
Change-Id: I781cf4ed4125fcad212eba5430a264f3a3d71c16
This is recommended by Apple and other content providers:
https://apple.co/2uTTAc4
- Set default --clear_lead to 12 seconds, i.e. about 2 segments.
- Set default --fragment_duration to 0 so fragment (sub-segment) is not
generated by default.
Change-Id: Ie6ec3ab6f0ce973547989c663a92b637a2fdc47c
It is possible to see a negative timestamp if the input mp4 file
contains EditList.
Also increase the queue size for EncryptionKey to be able to handle
smaller crypto_period_duration during testing.
Change-Id: I68278bf482d6662e771d9b80f4d5409605065aac
Configurable with --transport_stream_offset_ms.
This is needed to compensate for possible negative timestamps in
inputs, which could happen on ISO-BMFF with EditLists.
Issue #112.
Change-Id: I0fce8766c9df2911b9bb859c1e54052a8ed2abfb
In some ISO-BMFF files, there is an initial non-zero composition offset,
but there is no EditList present.
This is against ISO-BMFF spec recommentation [1] and we believe in most
cases it is just missing the EditList.
[1] 14496-12:2015 8.6.6.1
It is recommended that such an edit be used to establish a presentation
time of 0 for the first presented sample, when composition offsets are
used.
Issue: #112.
Fixes: b/110782437.
Change-Id: I23d33810ce536b09a1e22a2644828d824c1314f5
- EditLists in input files are parsed and applied to sample timestamps.
- An EditList will be inserted in the ISO-BMFF output if
- There is an offset between the initial presentation timestamp (pts)
and decoding timestamp (dts). Chrome, as of M67, still uses dts in
buffered range API [1], which creates various problems when buffered
range by pts does not align with buffered range by dts. There is
another bug in Chrome that applies EditList to pts only [2]. This
means that we can insert an EditList to align pts range and dts range.
- MediaSamples have negative timestamps (e.g. for Audio Priming).
You may notice the below change on some contents:
- Some media duration is reduced by one or two frames. This is because
EditList in the input file was ignored in the previous code, so video
streams start with a zero dts and a non-zero pts; the smaller of dts
and pts was used as the starting timestamp (related to the earlier
workaround for Chrome's dts bug), so the calculated duration was
actually a bit larger than the actual duration. Now with EditList
applied, the initial pts is reduced to zero, so the media duration is
also reduced to reflect the actual and correct media duration.
It may also result in negative timestamps in TS/HLS Packed Audio, which
will be addressed in a follow up CL.
Fixes#112.
Partially address b/110782437.
[1] https://crbug.com/718641, fixed but behind MseBufferByPts.
[2] https://crbug.com/354518. Chrome is planning to enable the fix for
[1] before addressing this bug, so we are safe.
Change-Id: I59317740ad3807ca66fa74b3a18fdf7f32c96aeb
DASH live profile with static MPD was incorrectly handled in the same
way as live profile with dynamic MPD, i.e. by assuming the synchronized
Representations, which is incorrect.
It can be easily re-produced in multiple period outputs, i.e. with Ad
cues. It may happen with regular contents as well, due to race
condition, though with a much lower chance of occurring.
Fixes#435.
Bug: 111359775.
Change-Id: I7de087f5dd8602b4c4e35cb697d589fa3699e8a5
They will result in empty DASH representations, which is not spec
compliant.
For text, if the cue is before the max end time, it will still be
dispatched as the text samples intercepted by the cue can be split into
two at the cue point.
Bug: 111359775.
Change-Id: I55c2025c4e9d64c88e6a685c0cf3024a0cc4a6d8
MPD cannot be validated right now since we do not generate deterministic
mpd with multiple inputs due to thread racing.
Exclude mpd comparison in this case.
Change-Id: I03b68b4969a39e20927c8a9b1475f72493682696
I.e. enable --generate_dash_if_iop_compliant_mpd in mpd_generator by
default.
It was enabled in the main packager binary in v1.6.1.
Change-Id: Icfb19758c52c107e8ab17d3fb581923fa291cc0a
WebVTT cues without payload may not carry meaningful information, but it
is allowed by WebVTT specification [1]. It could also be useful
sometimes, e.g. to signal the time progression in live case.
Fixes#433.
[1] https://www.w3.org/TR/webvtt1/#types-of-webvtt-cue-payload
Change-Id: I9e31f4a3789cbdafb7667b64f4019834190ecfc0
- Support decryption verification in _CheckTestResults
- Allow diff_files in _CheckTestResults
- Update all functional tests to use _CheckTestResults
Change-Id: I3f9c02f35808eba787becf9b1e5c1ce9238f943e
Instead, caclulating average bandwidth by dividing the sum of the
sizes of every segment by the sum of the durations of every segment.
This aligns with the requirement in HLS spec:
https://tools.ietf.org/html/draft-pantos-http-live-streaming-23 4.1.
BandwidthEstimator is also simplified to handle all blocks only.
Fixes#361
Change-Id: I89e7d415a841f4d4048f199de8dae7ffa250467b
There are non-ASCII characters in comment section of some source
code, which is causing compilation problems on some systems with
a codepage that cannot represent these characters.
Fixes#419.
Change-Id: I20d68a201263d515290ee440b52c5354b739099a
Before we had an assert that would catch if a sample had an
invalid times, however input may have bad times.
We did have a message if we saw a sample with a duration equal to
zero. This expands that check to check if the time is valid in
general and will ignore any sample that is not valid.
Fixes#425
Change-Id: I9774bfbdbd401f3016d2c345665b9973d1889db7
This flag was designed for two purpose:
- Grouping fragments into subsegments, achieving three level hierarchy:
segment < subsegment < fragment.
- Indicate whether to generate 'sidx' box in media segments (when the
value is set to a negative number).
There are no practical use case for the first purpose. Removing it to
simplify the code and reduce the confusion.
Introduce another flag --generate_sidx_in_media_segments for the second
purpose.
Change-Id: I4be7cd42662fb324c1158b978e05768ee49dd048
It was implemented to workaround Chromium's DTS
https://crbug.com/398130, but the workaround does not really work in
all situations.
Remove it now as we already have another workaround available.
Change-Id: I291f559d78120fb743a6679b7d927e5bbc5b6b4e
DTS was used in ChunkingHandler. As a result, SegmentInfo contained
timestamp in DTS. MP4Muxer has a logic to change SegmentInfo to use
PTS but not in other muxers.
Benefits of using PTS in ChunkingHandler:
- De-dup the redundant logic in MP4Muxer
- Ensure consistent behavior in different output containers
- Consistent with other timestamps, e.g. Ad Cue timestamps
Issue #413
Change-Id: Ib671badf144e0c0866d60f4ff0ac0cbbdd33817e
We always assumed that text stream started at zero in the text chunker.
This meant that if the text stream started later than zero (like in a
live stream) we would generate a lot of empty segments.
Instead the text chunker will assume that segments should be adjusted
to align with multiple of segment duration. The text chunker will assume
that an earlier component in the pipeline (i.e. text padder) will ensure
that the first sample has the time that we want to start segments at
(even it needs to add an empty sample).
Issue #416
Change-Id: Ie45844354d6e9448787cae896841b5ab31721ed6
Previously, the text padder media handler would assume that text always
started at time zero. This would work for VOD but would result with a
large pad at the start of LIVE content.
To avoid this, the text padder will use a bias to test whether or not it
thinks the content starts at zero. Right now the bias is set to be 10
minutes, but will later be configurable with a command line flag.
10 minutes was used as LIVE content will have much larger values and VOD
content should have much lower values.
Issue: #416
Change-Id: I07af15a577392fb030e36f052085cd4e667700e8
This is a more faithful implementation of more_rbsp_data().
There could be trailing null bytes in NAL units. This isn't valid per
H264 specification, but the referenced bug includes a sample where the
PPS in the avcC record includes a trailing null byte.
Workaround the problem so packager does not fail.
A similar problem is workarounded in Chrome:
https://codereview.chromium.org/1107593004Closes#418
Change-Id: I28cb8a9371945dc094f766c3e559d7a66859b451
This allows UDP receive buffer size to be increased to avoid potential
packet loss result from receive buffer overrun.
Another related flag is --io_cache_size. buffer_size in UDP options
defines the UDP buffer size of the underlying system while
io_cache_size defines the size of the internal circular buffer managed
by Shaka Packager.
Closes#411
Change-Id: I57c843a88f13da546417dadc2a78df2bee0a00f3
Under VLOG(1).
IO Cache circular buffer full could result in UDP packet loss with UDP
inputs.
Related to #390 and #411.
Change-Id: Ia5636a70827978b5c2f71f6495256d758766632f
When we built the cue alignment media handler, we did not remove
the old solution.
This change removes all the code for the old solution.
Change-Id: I851b284c449c7d25aaabc2f55df5579ba7b5aad1
Originally the create and dispatch of stream data in the cue
alignment tests were separate to improve readability. The idea was
to separate building each stream and dispatching the streams muxed
together would make it easier to understand the streams.
However, coming back to the code, this did not hold up as it took just as
long to understand the code. So merging the two together allows for the
code to be more concise.
Change-Id: I77f6bb67e7fb0ca7af0553c3baf07082770da74c
In the media handler there is an example of what a one-to-many media
handler would be. It used the trick play handler as an example, but that
handler is now a one-to-one media handler. Changed the example to use the
replicator media handler.
Change-Id: I26908c6e27ea4a697a19c0fa0179c60842a449d2
Made ChainHandlers to MediaHandler::Chain so that it can be used in our
test code as well. After all it is a pretty helpful function.
Change-Id: I8d83ee184052cd9fa9b37f2741c96f3223d5ab48
Ran clang-format over media_handler.cc and media_handler.h so that
later changes won't update the formatting as much.
Change-Id: I2db4f9f4e8a66fca1e1418ab99b283a0e4a70e4c
The copy and assign in MediaHandlerGraphTestBase referred to the wrong
types. This changes them to refer to the correct types.
Change-Id: I165c9a1da39b49adf41e7c35ae3e4a0b9ecfa838
Having "wvtt" in the codec string (in the master playlist) causes
errors on some older Apple products. As including it is optional,
we are opted to omit it to ensure support for all Apple products.
Close#402
Change-Id: Ib1072bcc26a3ff66e3a6d3204789c0c8c678d4db
Reduce which variables we check in the cue alignment tests by replacing
the less important variables with "_".
Change-Id: Id8770b5f2045ad5c8ac6eee54d6a291d933a4b6f
We have adopted some new standards for how we are writing the media
unit tests. This change goes through the trick play tests and
updates them to be more inline with how we are doing new media
tests.
This include using "_" for parameters that are not the focus of the
tests (used in the EXPECT calls).
This includes wrapping Dispatch calls so that the test bodies can
be more readable.
Change-Id: Iab4b1ce67666b6c8a4a821db1a8f4369cd366dc3
Added a matcher for Video Streams. This will allow us to use a general
matcher in tests for video specific fields.
Change-Id: I91b9aebd66be37ec6d5f09b762263fafaef854c2
Added a StreamTypeToString function in StreamInfo (where stream type is
defined) so that we can print the type in a more readable way.
Change-Id: Icb1d10f5a72dca314d9bdf07e9cd0c0a185bd791
Ran 'clang-format' over stream_info.h and stream_info.cc so that
later changes can focus on the actual changes and not the formatting.
Change-Id: I8a75fe0f88db533f4a811d65dabd023033f07bda
Added the key frame field to the IsMediaSample mather. All
tests that do not care about a sample being a keyframe (or not)
have been updated to use "_".
Change-Id: I44180687c58c260b6856e683d647f532227b14d5
Updated all the stream data matcher we use in our unit tests
to allow us to use matchers in them. We are now able to use "_"
to ignore specific parameters.
With this we were able to replace the different version of
matchers for each stream data type with a single instance for
each type.
Includes updates to printing strings to the listener. Strings
now go through a "pretty" function to help make it easier to
read them in the output.
Change-Id: I146351b54fccd63ab9ec936877e6c6b30f9aa9fc
In the cue aligner, we assumed that all text will be in milliseconds.
This was the last place with that assumption. This change removes that
assumption and uses the stream info's time scale.
Issue #399
Change-Id: Ie21bf27148e020bd85111dcace0bbdff3419c1ac
Before, the text chunker would assume that all text streams were in
MS, which is not a safe assumption to make.
This changes it to take the time scale from StreamInfo and work
natively with scaled time units.
This required updating the tests. While doing so the tests were
rewritten with the goal to make them easier to read.
Closes: #399
Change-Id: Ib792ad306f40d749763418cde645337913a6046b
Make the text stream info factory method in media_handler_test_base
require the caller to specify the time scale.
Issue: #399
Change-Id: Ibdfb183e0aa3f4ff50edf6b58c4e9b966006c6d2
Configurable under flag --use_legacy_vp9_codec_string, which defaults
to false as all major browsers and platforms support new style vp09
codec string already.
Closes#406.
Change-Id: I22e917777f9d66db815ff9d55eb47b6d55806269
- Also fixed documentation missing --hls_playlist_type LIVE for HLS
live examples.
- Also updated packager.cc to use RETURN_IF_ERROR macro for
consistency.
Fixes#347Fixes#403
Change-Id: Idbccd7137b873170cd54e2c780bd554d25031a0b
Since the WebVtt mp4 to mp4 path did not include all the features
we needed and we know of no-one who is asking for it. We are opted
to remove the path so that there will be an error rather than
incorrect output if they try to use it.
Issue #405
Change-Id: Id2c37bb385c514dd8e31f7d3bd75fb3904b70d78
To ensure that every variable in a box is explicitly set
every variable has been assigned a default in the header.
Change-Id: Iaa806c4058ac6621a64363a00040fbd9903c6710
Text Samples with no payload should be ignored, so this adds a
test to check that samples with no payload get treated the
same as a gap.
As long as this case is true, using gaps in our other tests should
functionally be the same as using samples with no payload.
Change-Id: Ic16b240c43eda2514b537a2d938d4135638adc4e
Before we used the sample payload for each text sample as we were
focusing on the times rather than the contents.
As we look to add tests that rely on specific sample payloads, we
need to change the tests to explicitly set the payload for each
sample.
Change-Id: I24174686f46535cf6c2d59a18308101a3bb51c87
EPT (earliest presentation time) may be adjusted not to be lower than
the decoding timestamp (dts), but the adjustment should only be done
on the first file when there is one file per Representation per Period.
The second file and onwards should not be adjusted otherwise a GAP
would be created.
Closes#384
Closes b/78517422
Change-Id: I56771ad8fbbe6a87b832ec58854cfbf37d5f1817
In our text to mp4 tests, we were only checking if the times on
the samples lined-up with what we were expecting.
We want to check that text sample contents (ids, settings, and
payloads) were correctly merged into a single media sample. To
verify this, we now check if the sample ids appear in the
media sample.
Change-Id: Ica1a85a14e7b116275e3571332b2e90d7bc44c45
In our text to mp4 tests, we used the same sample id for each sample,
this changes it so that each sample (within a single test) has a
unique id.
This is done in preparation to look for the ids in the created
media samples.
Change-Id: I3215a6f09279af8f40e1ce8a959e0a522a811173
The previous text to mp4 webvtt pipeline was incomplete. It
did not insert ad cues and it could only insert a segment
after a sample ended.
Now the pipeline supports ad cue insert and segment insertion
mid text sample. This required the pipeline to use the text
chunker (to split samples and insert segments) and required
a major overhaul of the text to mp4 converter.
Before the converter came before the chunker. This meant that
the converter only expected to see stream info and text samples.
Moving the converter after the cue aligner and chunker means
that the convert had to be aware of segments and cues.
The general approach is the same, however the converter will
convert the samples per-segment as the chunker will introduce
duplicate samples if a sample spans across segments.
Closes#362Closes#382
Change-Id: I0f54a40524c36a602ad3804a0da26e80851c92fd
Allow the output file to contain template identifiers like $Number$,
$Time$ etc. Unlike the actual template used in SegmentTemplate, the
identifiers in output will be populated before pushing to the DASH
manifest.
Issue: #384
Change-Id: Ife1caadb6fccd32167fa1bc83fe2afcb2d2ad087
- Add command line flag --test_packager_version to inject packager
version; packager_main.cc is also updated to use the same flag.
- Also add a MpdGenerator test in packager_test.py.
Change-Id: I9a11a0ee5502ba30a8acc4d44ebbfaabbe0f2f6e
This is needed to support one file per representation per period where
there will be multiple content files generated.
Issue: #384
Change-Id: Ib7af750edf864d99075b8da4f3640217a5a94302
In the text sample box (for mp4) there was a value called
"data_reference_index" that was never initialized. This meant
that it took on various values can caused different results
between runs.
Change-Id: I4b18ac97ec4700f6e651b14898ef250713a4253c
Renamed all the files called "webvtt_output_handler*" to
"webvtt_text_output_handler*" to better reflect the class name
in them.
Change-Id: I977bab362076974a124f263bcefff716ed8b6a0f
The SetUpAndInitialize function returns a status. We were not
asserting that it return an OK status. This change adds the
missing ASSERT_OK calls.
Change-Id: I044f60c0450d46fc0f6495319b1ed7ef8ab6e794
We don't want to allow any handler to be copyable or assigned-over
so this change enforces that for the webvtt output handler.
Change-Id: Ie0d59d6dbfb7a5e00bb4dd1422cd696d1a2d6072
Before, the webvtt output handler was written so that it could
share code between a segmented and non-segmented handler. As
we are not worried about that right now, this change simplifies
the handler to just be about segmented output.
Change-Id: I29dbc4e3a4ffbeb7ea10e23db489ee74b398a6c4
Previously for the last iframe in a segment, we wait for the next
segment to arrive before writing the EXTINF tag. If an Ad Cue comes
in before the next segment, the EXT-X-PLACEMENT_OPPORTUNITY tag would
be inserted before the iframe in previous segment.
Fixes#378, #396.
Change-Id: I1ede72a4d4edca94781c7b05bc25397d67916d1a
Instead of failing immediately, ignore unsupported audio codec when
parsing the source file, as there may be more than one stream in the
source file. This allows the supported streams to be packaged.
Closes#395.
Change-Id: I01005a93a19012c19065251647c9b06dd25c673a
The Cue class was from a previous WebVTT implementation and
is not used in the current implementation. It was missed when the
other classes were removed. This change removes it.
Change-Id: I661ab3fcd80b5e5ef98b5213746b341a4028d1a1
- Added a new --enable_entitlement_license flag, which sets
'enable_entitlement_license' in Widevine CommonEncryptionRequest;
- Support 'boxes' in Widevine CommonEncryptionResponse.
b/78171767
Change-Id: Id399fc7fcb2948c571e12c8af7687cfcfcef41fe
Requiring output format determined from 'output' to be consistent with
output format determined from 'segment_template'.
Change-Id: I32cbd63fcd6e2a4272dd0db531c1d5b385315445
When originally implementing the webvtt parser, there was a
misunderstanding in what the BOM was suppose to be
(https://en.wikipedia.org/wiki/Byte_order_mark). This corrects the
misunderstanding.
Close#397
Change-Id: I250d392db228e5e9b86684614b57adc5d8a4e5fe
Make sure to use the output format when given when setting up our
tests. Not doing so results in text always being set to "vtt" when
the output format is "mp4".
Change-Id: I11c5f861091598a67fc76dc19b1b16a9a773a2e0
Problem : Text samples have variable length and therefore act
more like continuous samples whereas audio and video
act more like discrete samples. Since we use sample
start time, a cue event could be inserted after the
start time of the last text sample and never get
inserted as there are no more samples.
Change : After all streams have requested flushing, we make sure
to collect all remaining cue events from the sync point
queue and insert them into each stream.
Issue #362
Change-Id: Id8f136f7ef53531f7a7f412613eac352324e0130
Create an end-to-end test for ad cues. This test's final result is not
correct but illustrates the problem we have in the cue insertion and will
be fixed by a later CL.
Change-Id: Ia8b43a53848941be52cf9ade018668e6477e8df2
Uses protobuf JSON util instead.
packager/base/json_writer comes from Chromium base. We are going to
replace it with abseil, which does not have a JSON library.
The code is much more cleaner now.
This is unfortunately, at the expense of increased output binary size.
packager binary increases by another 100KB.
Change-Id: I83a9217a484cad3c41147ad9a75311384347c49c
Use protobuf utilities instead.
packager/base/json_writer comes from Chromium base. We are going
to switch to abseil which does not have a JSON library.
This is unfortunately, at the expense of increased output binary size.
packager binary increases by about 300KB due to:
- Protos cannot be compiled with LITE_RUNTIME any more.
- Additional protobuf library needed to convert between JSON and proto.
Change-Id: I45a497376925b42d147ffcaabcfc2fa4dbdeacc1
In the cue alignment handler, instead of storing just one cue, store
a full queue. This will make it easier to handle text streams that
end before audio and text.
Change-Id: Ida97008fa015639350261bd3f76f4cb901747c66
In the cue aligner, instead of storing the cue event, store a
stream data so that we don't need to know the stream index when
sending the cue event downstream.
Change-Id: Ice27da021fad2872e2a23975b959630a9d43b736
This is in preparation of supporting entitlement license API, where
common encryption server may return concatenated PSSHs directly.
Refactored ProtectionSystemSpecificInfo into a struct containing
concatenated PSSHs. This will make it easier to pass PSSHs around.
Also, most of the time, users of ProtectionSystemSpecificInfo do
not care what is in PSSH; so moved PSSH box parsing and building out
of ProtectionSystemSpecificInfo.
b/78171767
Change-Id: I1c4d5e7e23efd2f7d4b2b9704378323112e47f00
To make it easier to understand what a video stream and a non
video streams is doing in the cue aligner, each stream type is
given their own functions.
Change-Id: I8b8ca403721bcb06ca3056004420902667a30f6c
Use a common hint for all stream states as the hint is always
updated when we get a new cue event. Cue events are only gotten
when be pass the hint, so there should only need to be one hint.
Change-Id: I0838110b9b10325a9e99f8fca0b11f0a6b48f8a0
To allow generating Widevine / Playready PSSHs if the corresponding
PSSH generator is specified.
Note that Key Rotation with RawKeySource is designed to be used for
testing only.
Change-Id: Icaf9e74955c082a7b000bd6a08f4561f2e01a2e2
By having 'disable-clang-format' in commit message.
If you have the script setup as git pre-commit, it can be disabled
by '--no-verify' option.
Change-Id: I6fb358e85105255fddde41f950e986c74b7defc9
Problem: Sending samples to the cue alignmenet handler did
not reflect what was more likely to happen. In our
tests we would send all the samples for one stream
then all the samples for another stream. This created
some special cases that would either not happen in
reality or miss cases that would likely happen in
reality.
Changes: Changes all tests to dispatch samples in an interlaced
pattern that better reflects muxed content.
Change-Id: I985092154b62eb12d95499663d195ca6c103bc19
In H265Parser::ParseSliceHeader, the parser does not handle
byte_alignment() from the spec. byte_alignment() reportedly contains
at least one bit, which is not handled right now.
See Section 7.3.2.12 Rec. ITU-T H.265 v3 (04/2015).
Also added a few size sanity checks in H265Parser to make sure the
code does not crash if an invalid input is provided.
Fixes#383.
Change-Id: I33b31396058fc5ba67a0fc119be5fe56ec9443b0
Packager uses ThreadedIO to write media segments and manifest /
playlists. There was a possibility that media segments write being
delayed and scheduled after updating manifest / playlists.
This CL fixes the race condition.
Also added a note on how segments can be synced to cloud storage to
avoid the race condition during file sync.
Also added a live WebM test.
Fixes#386.
Change-Id: Icf9c38cdec715fa3dc2836eab1511131e129fe41
Fixes#387.
Note that the output will not play in Chrome until the Chrome bug
https://crbug.com/837832 is fixed.
Change-Id: Ic3e917161cedfa773c0a18b4a5d7b1254c6f1313
The number of preserved segments outside live window can be
configured using flag --preserved_segments_outside_live_window,
which is default to 50, i.e. 5 minutes for 6s segment.
Note that the segment removal will be disabled if it is set to 0.
Only HLS live playlist and DASH dynamic MPD are affected by this flag.
- Also add end to end tests.
Fixes#223.
Change-Id: I8a566efebe2f1552c7d9509ab017bade5a4a1c98
Problem: The time scale for text was being set to zero in our tests
because it was never needed.
Change: This changes it to use MS as that is what's most common and
requires the least amount of changes.
Change-Id: Ia046ac1994b4cede079d2f801275c7f058d5bdd3
To move us toward no longer need to ensure order when building
our pipeline, use a map to share demuxers between stream descriptors.
This will even allow use to use the same demuxers in the text pipelines
while still building them separately from the audio and video streams.
Change-Id: I4d4dbddbc06adee36cbe7f4aa1f6769f7bb2a3f6
It is not always possible to align segment duration to target duration
exactly. For example, for AAC with sampling rate of 44100, there are
always 1024 audio frames per sample, so the sample duration is
1024/44100. For a target duration of 2 seconds, the closest segment
duration would be 1.984 or 2.00533.
This feature allows MPD generator to treat these segments as having
the same duration, thus allows MPD generator to generate less
SegmentTimeline entries and potentially no SegmentTimeline entries
(replaced with SegmentTemplate@duration instead if
--segment_template_constant_duration flag is enabled).
Under flag --allow_approximate_segment_timeline. Disabled by default.
Fixes#330.
Change-Id: I5044eaa348ebbf45bf792a2af53fc95a115ae21b
- Allow including Widevine and Common SystemID PSSH boxes
for PlayReadyKeySource.
- --playready_key_id and --playready_key flags are deprecated.
- --enable_raw_key_encryption already supports playready PSSH generation.
Addresses issue #245
Change-Id: I072d4f43a3239875959e4c5b1eb6854415d7367e
To ensure that we can parse content with style and region blocks,
this change updates the parser to skip those blocks so that we
can still parse the cues from a file.
Full style and region support will be added later this year.
Issue #380
Change-Id: I11b8fd862a108c27a5c67b15d4703532b44a1214
Removed the logic in MuxerListener to estimate bandwidth from file
size and duration, since it is not compliant to the spec.
MpdBuilder will estimate bandwidth from segment size and duration
if bandwidth is not specified in MediaInfo.
Here is the statement from DASH spec (23009-1:2014):
Consider a hypothetical constant bitrate channel of
bandwidth with the value of this attribute in bits per second
(bps). Then, if the Representation is continuously delivered
at this bitrate, starting at any SAP that is indicated either by
@startwithsap or by any Segment Index box, a client can
be assured of having enough data for continuous playout
providing playout begins after @minbuffertime *
@bandwidth bits have been received (i.e. at time
@minbuffertime after the first bit is received).
For dependent Representations this value specifies the
bandwidth according to the above definition for the
aggregation of this Representation and all complementary
Representations.
Fixes#376.
Change-Id: I0fddce39e709d0cded0a4c9ae59adbbcc97ec5ea
And for HlsNotifier and SimpleHlsNotifier as well.
This will make it easier to add preserve_segments_outside_live_window
param in a later CL.
Change-Id: I86d464fe247e04574158a0a76e39d8a122960ae4
The file_name fields will be used to solely indicate file paths on the
designated file system, and they are used to do normal file operations,
including file creation, file updating and file removal if needed;
added new xxx_url fields, for the URLs that should appear on DASH
manifest or HLS playlists.
xxx_url are the URIs of the media in the manifest. The fields are
converted from file_name fields but adjusted to be relative to DASH
manifest path or HLS playlist path, optionally with base_url prepended.
Previously the file_name fields are converted in place to indicate
URLs when passing to manifest / playlist builders. The original file
names were lost, which made it difficult to remove files outside of
live window.
Now that the input file names are preserved. File system APIs can
operate on the original file names while manifest / playlist generation
functions can operate on URLs.
Issue: #233
Change-Id: I36a64f16e3d1261ce91783a86588f24ad1371662
According to DASH spec (23009-1:2014):
Consider a hypothetical constant bitrate channel of
bandwidth with the value of this attribute in bits per second
(bps). Then, if the Representation is continuously delivered
at this bitrate, starting at any SAP that is indicated either by
@startwithsap or by any Segment Index box, a client can
be assured of having enough data for continuous playout
providing playout begins after @minbuffertime *
@bandwidth bits have been received (i.e. at time
@minbuffertime after the first bit is received).
For dependent Representations this value specifies the
bandwidth according to the above definition for the
aggregation of this Representation and all complementary
Representations.
This suggests that max bitrate should be used instead of average
bitrate.
Also cleaned up BandwidthEstimator code.
Fixes#376.
Change-Id: Ibf5896394c5c6bb820849771a2129c59202d2273
Content-Type for Widevine key request was incorrectly set to text/xml,
but it should be application/json.
Also added VLOGS for curl calls.
Fixes#372.
Change-Id: I4230795a582112c6d9c12883b5e61481b63284aa
Two-character ISO-639 code in --default_language was ignored due to
a bug in language code matching as the language code in stream is
always converted to 3-character code.
Fixes#371.
Change-Id: I8618938af583a417446636ff9efe1c72ce822c33
This flag was introduced to workaround a rounding error in Chrome
(probably in other browsers too).
Also although this flag avoids the first frame of a Period to be
dropped due to rounding error but it could cause the last frame of a
Period to be dropped.
Now that we use a high precision Period@duration, we do not expect to
see rounding errors any more. The player would be a better place for
the workaround even if it is still needed.
Related issue: #368.
Change-Id: I3bd517ecc6d548ff62e0c13394edb49d4bc68e8f
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
UTCTiming schemeIdUri and value pairs can be provided to packager using
--utc_timings flag. It should be comma separated list of
schemeIdUri=value pairs.
Note that urn:mpeg:dash:utc:direct:2014 scheme is not supported as it
requires the MPD to be dynamically generated on the fly when MPD is
served to client.
Fixes#311.
Change-Id: Ibc07af8a6d8b2b6261ba3ecd2c02f23809f96614
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
Created "Chain" function to connect a series of handlers together so
that the connection is easier to read.
Changed other calls to use RETURN_IF_ERROR to help make it easier to
read as we no longer need to track the status variable anymore.
Change-Id: Iffb76ca395b6d62f8feb054c09470c77718e8feb
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
sr90
Joey Parrish
Abhay Sundaram
Tomohiro IKEDA
KongQun Yang
Daniel Cantarín
Vladimir Kazakov
Phillip Baxter
srebrnyp
Denis Akhmetzyanov
Aaron Vaage
Yohann Connell
Haoming Chen
KongQun Yang