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
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
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
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
There could be rounding errors in MSE which could cut the first key
frame of the representation and thus cut all the frames until the next
key frame, which then leads to a big gap in presentation
timeline which stalls playback.
Adjusting presentationTimeOffset (PTO) by -1, i.e. backing off PTO by 1
to compensate for the possible rounding error. It should not cause any
playback issues as it is small enough. The workaround can be removed
once the problem is handled in all players.
The PTO adjustment is configurable with command line flag:
--pto_adjustment, with value set to -1 by default.
b/71808910
Change-Id: I9c4d1e2ee84008b859a3638a8146c910cead1f15
Also added Period::GetAdaptationSets and
AdaptationSet::GetRepresentations.
Instead of implementing GetDurationSeconds in all MpdBuilder classes
(MpdBuilder/Period/Adaptation/Representation) like what we used to do
with GetEarliestTimestamp, the two new functions allows MpdBuilder to
iterate through the Representations to get durations.
Also updates GetEarliestTimestamp functions to use the same iteration
method.
Change-Id: I682b70c07c248c0f6511ec3d9019086f986ee10e
- Update curl to 7.57.0
- Roll clang, which is needed due to MacOS / XCode update
- Fixes and suppress compilation errors due to clang update
Fixes#285
Change-Id: Ibac3288c641861605c3c0500d34d27373e6eecfe
Move AdaptationSet related functions to the new Period class, which
maps to <Period> element and provides methods to add AdaptationSets.
Change-Id: I0fee290769fbe9a6355cc1b8c86baec8fbc4b4fd
Clean up DashIopMpdNotifier to make it easier to add Period class.
- Consolidate protected AdaptationSet grouping related logic to the
internal ProtectedAdaptationSetMap class
- Clean up AdaptationSet creation logic and updating logic
Change-Id: Idd5b39bb89d38e490ca4f561a6b840ccc9f1e40a
Moved from mpd_unittest.cc to representation_unittest.cc.
Also removed unused test data files in packager/mpd/test/data.
Change-Id: I23811390b4b1ffbfac3e69c1ffcf92544099a53d
Move AdaptationSet related tests to adaptation_set_unittest.cc and
Representation related tests to representation_unittest.cc.
Change-Id: I360e9aea3ba08a32e5ba3b0e8b34345f2b3f0b20
Added gMock matchers for matching xmlNodePtr and its attributes.
Clean up mpd_unittests to make it easier to separate adaptation set
tests and representation tests.
Change-Id: I31816b06e9c76f92d4a82656c659f3b9acae8cb5
Problem occurs when the media playlists are in a sub-directory under
master playlist. If base_url is not set, media segment URL should be
relative to the media playlist instead of the master playlist.
Also make sure the path separator is "/" in URL instead of "\" on
Windows.
Fixes#253
Change-Id: I8e933750276435d94dd01bfa53ee2bc050dfd193
In the original manifest updating process, the file was truncated first
before was written with new contents. There is a small chance that
the web server may read back empty file or incomplete file.
The new code makes the update operation atomic (by writing to a temporary
file first then replace the old file with the temporary file).
Fixes#186
Change-Id: I2fd564cb12b922b032c0e9f70d2132a5b12ff098
frame_duration is not available when the VideoInfo is created, but
it will become available when a media segment arrives.
Change-Id: I2c24852fca4ff77c2b86ff78dbf0963ad0a0afa6
'availability_time_offset' is not an attribute in MPD specification,
but used to calculate availability_start_time to adjust segment
availability time. A similar effect can be achieved with standard
blessed suggested_presentation_delay flag.
If suggested_presentation_delay is not set, player is expected to
choose a suitable value.
Change-Id: I1d540bd4347b4f04b6cc5ec0778e1a5392009b09
This is a fix for issue #216 where the Representation::SlideWindow() logic was
still active even though a static MPD was being asked to be generated (using
the option -generate_static_mpd). This could cause static streams longer than
1800 seconds to start playing at (end-position-for-stream - 1800 seconds).
This change is in compliance with the current usage documentation for the
shaka-packager, which suggests that -time_shift_buffer_depth only is relevant
for dynamic media presentations.
Before this, HLS output did not contain language information.
Now, media playlists are properly tagged with a language in the
master playlist.
b/36134267
Change-Id: I172e946dbedd096a44cb2f917b007cc004756228
- Added two new fields in MpdOptions: dash_profile and mpd_type
- Updated MpdBuilder to support LiveProfile with static mpd
- Command line arguments will be updated in the next CL
Issue #142
Change-Id: Ibd35e5c9e1b1ef98043392e3f04a0af4700135c1
Current mechanism of using AdaptationSet @group is not spec compliant.
The spec compliant mechanism is to use supplemental descriptor with
schemeIdUri: urn:mpeg:dash:adaptation-set-switching:2016 as specified
in ISO/IEC 23009-1:2014/Amd.4:2016.
Fixes#156
Change-Id: I4d97648547a23315ba9c09dcadb14e18c99a45fc
Setting this flag will tag any matching tracks with kRoleMain.
The player will then know which tracks should be default when there
is not a language match.
Closes#155
Change-Id: I827304c49e345d07b1e76f7a46421b60f228f0ba
1. Replace STLDeleter with unique_ptr in container, which is
supported in C++11
2. Replace string_as_array with &string[0] which is guaranteed
to work in C++11
Change-Id: I7f39c0e51fc8a3fcbb41313094a0ca6b33db7bf3
KongQun Yang
Haoming Chen
Rintaro Kuroiwa
sylt
Joey Parrish
Thomas Inskip