Releases
v4.4.0
4.4.0 (2023-08-30)
Features
ABR: Abr improvement config (#5400 ) (b51ee6e )
Add a Mp4Generator (#5127 ) (d475a73 )
Add AAC silent frame getter (#5557 ) (933f039 )
Add AAC transmuxer (#5240 ) (00d3a45 )
Add AC-3 and EC-3 support in Mp4Generator (#5235 ) (28d18ad )
Add AC-3 detection in TS (#4931 ) (48c30bc )
Add AC3 transmuxer (#5297 ) (6f83997 )
Add EC-3 detection in TS (#5144 ) (24a3b7d )
Add EC3 transmuxer (#5352 ) (7d24e14 )
Add ExpressPlay FairPlay util (#4926 ) (7fa40fd )
add feature-flag to insert fake encryption in init segments on broken platforms (#5561 ) (f14f295 )
Add getManifestType method (#5021 ) (c7c5e94 )
Add liveSync configuration to catch up on live streams (#5304 ) (db44dc8 )
Add missing export in TsParser (#5145 ) (412a7e8 )
Add MP3 transmuxer (#5208 ) (82e905b )
add Occitan locale (#4900 ) (68486a3 )
Add originalLanguage to the Track structure (#5409 ) (f53349f )
Add preferredAudioLabel to PlayerConfiguration (#4763 ) (aadecd6 )
Add preferredVideoHdrLevel config. (#5370 ) (2f511a2 )
Add safeMargin as a parameter of the player selectAudioLanguage method (#5316 ) (e4a4138 )
Add support for AC-3 and EC-3 audio in DVB streams (#5484 ) (9bd559b )
Add support for changing codecs in MediaSourceEngine (#5217 ) (464f33c )
Add support for Document Picture-in-Picture (#4969 ) (3828fd6 )
Add support to old EMSG schemeId for ID3 (#5320 ) (cd9ee09 )
Add support to streamDataCallback when using prefetch (#5310 ) (6104b57 )
Add TS transmuxer (#5386 ) (eec25b2 )
Ads: Add ads config (#5085 ) (dfe263a )
Ads: Add control AdsRenderingSettings (#5536 ) (d37143e )
ads: Add getPodIndex to CS and SS ads (#5524 ) (65cf077 )
ads: Add new methods to Ads (#5107 ) (2b33315 )
Ads: Allow multiple calls to requestAds in CS (#5542 ) (837e0fb )
Ads: Allow use a custom playhead tracker in CS (#5543 ) (362f03f )
Ads: Disable custom playback on iOS 10+ browsers for client-side ads (29e022e )
ads: Dispatch a player event for client-side ad errors (#5045 ) (673b7fc )
Allow custom plugins for transmuxing (#4854 ) (fac721d )
Allow generate muxed content with Mp4Generator (#5555 ) (1112d1d )
Allow generate segments with Mp4Generator (#5185 ) (8da971f )
allow reuse of persistent license sessions (#4461 ) (cc97da1 )
Allow VTT files with erroneous linebreaks (#2394 ) (9b1c614 ), closes #2358
Cache mediaCapabilities.decodingInfo results (#4789 ) (b7781f0 ), closes #4775
Caching and other efficiency improvements for mcap polyfill (#4708 ) (884c4ca ), closes #4574
cea: Add CEA parser for TS (#4697 ) (70fad8d )
CEA: Add support to vertical position in CEA-608 (#5531 ) (47224ff )
Config to require a minimum HDCP version (#4883 ) (61613cf )
Convert CEA parsers to plugins (#5195 ) (7bda65d )
DASH: Achieve better latency in LL streams (#5291 ) (f4bcc87 )
DASH: Add support for <dashif:Laurl> (#4849 ) (b441518 ), closes #4748
DASH: Add support for service descriptions (#5394 ) (693abd5 )
DASH: Expose accessibility purpose in track (#5216 ) (654a028 ), closes #5211
dash: Improve DASH SegmentTemplate performance with on-demand segment references (#5061 ) (f1c5a1c )
DASH: Remove MIN_UPDATE_PERIOD_ to achieve better latency in Live (#5286 ) (1515b7a )
Demo: Add Low Latency filter in demo page (#5392 ) (c378e10 )
Demo: Add MSS Playready asset (#5485 ) (89ca242 )
demo: Improve bug report button in demo (#5510 ) (4329d79 ), closes #5056
DRM: use preferredKeySystems to reduce requestMediaKeySystemAccess() calls (#5391 ) (6d75d89 )
Enable variant failover for BAD_HTTP_STATUS and TIMEOUT (#4769 ) (b46012d )
export period combiner (#5324 ) (e9ba2f4 ), closes #5307
HLS: Add HLS config to ignore manifest timestamps when in segments mode (#5103 ) (4d487e4 )
HLS: Add HLS support for non-sequence mode (#4623 ) (2b50b88 )
HLS: Add support to _HLS_msn query param in LL streams (#5262 ) (2ece86f )
HLS: Add support to _HLS_part query param in LL streams (#5265 ) (ec8804d )
HLS: Add support to blocking playlist reload by adding the CAN-BLOCK-RELOAD=YES (#5279 ) (090554b )
HLS: Add support to BYTERANGE-LENGTH in EXT-X-PRELOAD-HINT (#5267 ) (ea97a5a )
HLS: Add support to HLS-AES128 low latency (#4982 ) (07787a8 )
HLS: Add support to HOLD-BACK in EXT-X-SERVER-CONTROL (#5281 ) (bb2c06a )
HLS: Allow delivery directives in Live streams (#5292 ) (aedf634 )
HLS: Fix update time when using LL-HLS and byterange optimization (#5495 ) (bba7537 )
HLS: Get resolution from TS when load a Media Playlist (#5058 ) (42a9f96 )
HLS: Improve detection of basic info from Media Playlist (#4809 ) (d465942 )
HLS: Improve HLS parsing time (#5264 ) (2ca7d0b )
HLS: Improve Low Latency performance in HLS (#4952 ) (5514385 )
HLS: Optimization of LL-HLS with byterange (#5319 ) (9e6655a )
HLS: Optimize LL-HLS with byterange (#5342 ) (53d6378 )
HLS: Parse #EXT-X-BITRATE (#5550 ) (123183d )
HLS: Parse SAMPLE-RATE attribute (#5375 ) (5af34ad )
HLS: Poll HLS playlists using last segment duration (#4779 ) (1ba3806 ), closes #4771
HLS: Support byterange optimization on servers with support to blocking playlist reload (#5347 ) (263a17b )
Improve live latency on load (#5268 ) (236dacb )
Improve parsing time in DASH and HLS (#5261 ) (f1e35fd )
Improve performance of multi-period DASH parsing (#5350 ) (5b0b429 )
Improve performance of setStreamProperties on low-end devices (#5380 ) (ddbc249 )
Improve sequence mode start time (#5326 ) (80cacf6 )
Include stack trace in errors dispatched from production builds (#5407 ) (7d049eb ), closes #5406
logs: Add extra logging for 3015 errors (#4932 ) (67a2451 )
Make gap jump timer time configurable (#5525 ) (97b7412 )
Move forceTransmux from streaming to mediasource config (#4783 ) (b491a6b )
MSS: Add support for Microsoft Smooth Streaming (VOD only) (#5002 ) (f80bf20 )
MSS: Fix MSS PlayReady support (#5486 ) (1dd9809 )
net: Added advanced type to filters (#5006 ) (fbce38a ), closes #4966
Optimize appendBuffer operations for init segments (#5377 ) (68f7a0e )
Parses a PRFT Box, with a loss of precision beyond 53 bits (#5354 ) (a797651 )
Parses a TFDT Box, with a loss of precision beyond 53 bits (#5329 ) (db73e1f )
Parses a TFDT Box, with a loss of precision beyond 53 bits (#5501 ) (c6e8449 )
Raise fatal error on linear manifest request update failure (#5138 ) (3ff7ba3 )
Set segmentPrefetchLimit to 2 by default for low latency streaming (#5275 ) (62f24d2 )
SRT: Support stylized payload in SRT format (#5500 ) (963cf61 )
Support customizing clearBuffers and safeMargin when select variants by label (#4770 ) (c724625 )
Support Parallel Segment Fetching (#4784 ) (de6abde )
Support private-use language tags (#5223 ) (fa041d7 )
UI: Add HDR label to resolution when the track is HDR (#5373 ) (3f9eade )
UI: Add PageUp and PageDown to UI seek bar (#5519 ) (8e22a50 )
UI: Add thumbnails to the UI (#5502 ) (c483975 )
UI: Allow customizing FullScreen element (#4963 ) (c471d23 )
UI: Remove copyStyleSheets (#5273 ) (fe43ed3 )
UI: Use Intl.DisplayNames to show the language name (#5365 ) (35cb193 )
Use local assets for transmuxer tests (#5549 ) (a75e776 )
Use shaka.text.Cue everywhere instead of shaka.extern.Cue (#5529 ) (62156ba )
utils: Export shaka.util.StreamUtils.meetsRestrictions (#5100 ) (3543e57 )
WebVTT: Add support to auto position (#5532 ) (a8f7c41 )
webvtt: webvtt colors output (#4954 ) (ed7a736 )
Bug Fixes
config.streaming.preferNativeHls
only applies to HLS streams (#5167 ) (bf4b4a5 ), closes #5166
add MIME type for HTML5 tracks (#5452 ) (4f1a119 )
Add missing AdvancedRequestType in some requests (#5113 ) (b60bf16 )
Add missing StreamInfo value in AAC transmuxer (#5260 ) (5175e88 )
Add mux.js to support.html (#4923 ) (d9fa4eb )
Adds missing CMCD params to some http requests (#5072 ) (fe38e45 ), closes #5067 #5094
ads: Fix ads starting muted behavior (#5153 ) (211624f ), closes #5125
Ads: Fix CS volume ad (#5016 ) (492b5f3 )
Ads: Fix SS configure (#5155 ) (49ed4ab )
Ads: Fix usage of EventManager on CS (#5017 ) (541badc )
Ads: Fix usage of EventManager on CS (#5084 ) (122f5f3 )
ads: Fix VMAP ads stay muted on muted autoplay (#4995 ) (d074afc )
Ads: Initialize correctly the IMA ads manager (#5541 ) (4428adf )
Allow the playback of TS without mux.js (#5041 ) (0b785f7 )
Avoid unnecessary timestampOffset updates when using HLS segments mode (#5270 ) (9059944 )
Caption can not turn off at iOS Safari (#4978 ) (9d2c325 )
cast: Added existence checks for MediaDecodingConfig.{audio|video} in decodingInfo(). (#4796 ) (36db83d )
cast: Use cast platform APIs in MediaCapabilties polyfill (#4727 ) (5d6f56a )
CEA 608 captions not work with H.265 video streams (#5252 ) (f0ee16b ), closes #5251
cea: Fix MAX_ROWS in CEA-708 window (#4757 ) (e89eeb6 )
cea: Fix not rendering CEA-608 on encrypted mp4 segments (#4756 ) (d600109 )
chapters: removed duplicate chapters by id (#4810 ) (151bdda )
cmcd not applying configuration changes (#5119 ) (58aa45f )
Correct default initDataTransform for legacy Apple Media Keys (#4797 ) (67a5d56 )
DASH: Avoid "Possible encoding problem detected!" when appending chunked data (#5376 ) (2071e3a )
DASH: Fix bufferBehind with image tracks regression (#5210 ) (2d9f566 )
DASH: Fix dynamic manifests from edgeware (#4914 ) (056588b )
DASH: Fix seeking on multiperiod content after variant change (#5110 ) (3b0f013 )
DASH: Ignore minBufferTime when using LL (#5285 ) (fea46d8 )
Default language to 'und' for native tracks (#5464 ) (8cd3e2d )
Demo: Allow enable LL only with Low Latency Mode config (#5266 ) (70823f9 )
Demo: Allow manifest type for DAI custom assets (#4977 ) (1e50630 )
Demo: Fix deployment of codem-isoboxer in the Demo (#5257 ) (03b39f7 )
Demo: Fix error link width to avoid overlap with close button (#5309 ) (08317d0 )
demo: Fix native controls pointer events stolen by LCEVC canvas (#5065 ) (6508f40 )
Demo: Show correctly external text in the Demo (#5521 ) (e2bf1de )
Demo: Trim custom manifestUri to avoid copy-paste errors (#5378 ) (0e32256 )
Dispatch all emsg boxes, even if they are ID3 (#5428 ) (25ecfa7 )
docs: fix player configuration code in drm config tutorial (#5359 ) (5487236 )
Document Picture-in-Picture: Use width/height instead of initialAspectRatio (#5224 ) (0da63a0 )
don't use navigator.connection event listener if it isn't implemented (#5157 ) (fb68306 ), closes #4542
DRM: broken keySystemsMapping due to multiple references of drmInfo (#5388 ) (6513ac0 )
DrmEngine exception thrown when using FairPlay (#4971 ) (eebf18c )
exclude "future" segments from presentation timeline auto correct drift calculations (#4945 ) (ea6774a ), closes #4944
Explicitly specify @externs in transmuxer externs. (#4999 ) (ef8078a )
Failed to set 'currentTime' property on 'HTMLMediaElement' on a Hisense TV (#4962 ) (5d93b8f )
Fallback to isTypeSupported when cast namespace is undefined (#5012 ) (50d0645 )
Fire correctly MIN_HDCP_VERSION_NOT_MATCH error (2ae5a99 )
Fix bufferBehind setting broken by image segments (#4718 ) (cd1b7c0 ), closes #4717
Fix buffering on the end of MSS streams (#5196 ) (a8e3c9a )
Fix captions from MP4s with multiple trun boxes (#5422 ) (bccfdbc ), closes #5328
Fix compiler error on static use of "this" (#4699 ) (b06fd6a )
Fix DASH rejection of streams with ColourPrimaries and MatrixCoefficients (#5345 ) (226ffa9 )
Fix DRM workaround for Tizen and Xbox with hvc1/hev1 boxes (#4743 ) (a61c084 ), closes #4742
Fix duplicate updates in StreamingEngine (#4840 ) (224207b ), closes #4831
Fix duration error when HLS goes from LIVE to VOD (#5001 ) (1aee989 )
Fix error when network status changes on src= playbacks (#5305 ) (07ca8f5 )
Fix exception enabling captions on HLS (#4894 ) (b7b2a7c ), closes #4889
Fix exception on Tizen due to unsupported Array method (#5429 ) (8ff2917 )
Fix exiting fullscreen on Safari (#5439 ) (ed93a0c ), closes #5437
Fix failure when drivers lag behind browser (#5423 ) (a909ed4 )
Fix fetch plugin with old implementations (#5091 ) (36bcc37 )
Fix flattenedCues in WebVttGenerator (#4867 ) (15232dd )
Fix gap jump at start when first jump lands in a new gap (f56d49b )
Fix handling of CC when switching between codecs (#5160 ) (6937325 )
Fix HEAD request exception (#5194 ) (330f04b ), closes #5164
Fix implementation of AAC and MP3 transmuxers (#5296 ) (df18f10 )
Fix legacy codec support by rewriting codec metadata (#4858 ) (e351395 )
Fix media source duration when using sequence mode (#4848 ) (1762267 )
Fix MediaCapabilities polyfill on Hisense (#4927 ) (6a48cfe )
Fix memory leak on SimpleAbrManager (#5478 ) (e8f3ed0 )
Fix missing originalUri in response filters (#5114 ) (8bffb99 )
Fix parsing error on Chromecast when resyncing HLS (#4869 ) (afca6af ), closes #4589
Fix playRangeEnd does not work with HLS streams (#5494 ) (1775672 )
Fix potential AV sync issues after seek or adaptation (#4886 ) (c42565c ), closes #4589
Fix potential duplicate segments, AV sync issues (#4884 ) (52f4b63 ), closes #4589
Fix race that allows multiple text streams to be loaded (#5129 ) (2ae9095 )
Fix rare exception after StreamingEngine teardown (#4830 ) (234beef ), closes #4813
Fix selectVariantsByLabel using src= (#5154 ) (e7d94f7 )
Fix subtitles not added to DOM region (#4733 ) (4081434 ), closes #4680
Fix temporarily disable streams on network error (#5057 ) (fdc5cb1 ), closes #5055 #5150
Fix timestamp offset for ID3 on DAI-HLS (#4696 ) (386a28a )
Fix usage of WebCrypto in old browsers (#4711 ) (9afce3b )
Fix video/mp2t mimetype conversion. (#5039 ) (2d0e4cc )
Fix WebVTT parser failure on REGION blocks (#4915 ) (da84a2c )
gap jumping when gap exists at start position (#5384 ) (6c71b0e )
Get the correct timescale when there are two trak boxes (#5327 ) (022f6b9 )
gettting maxWidth and maxHeight for restrictToElementSize option (#5481 ) (9a3ac18 )
Handle empty media segments for Mp4VttParser (#5131 ) (6fd44c4 ), closes #4429
HLS: Add .tsa
and .tsv
file extensions as valid MPEG2-TS. (#5034 ) (a22bdc5 )
HLS: Add subtitle role when there are no roles (#5357 ) (7de6340 ), closes #5355
HLS: Adding support for DTS Express in HLS fMP4 (#5112 ) (#5117 ) (67b1e90 )
HLS: Avoid "Possible encoding problem detected!" when is a preload reference (#5332 ) (bd18a9d )
HLS: Avoid HLS resync when there is a gap in the stream (#5284 ) (b8c2004 )
HLS: Avoid variable substitution if no variables (#5269 ) (5a5a7ac )
HLS: Consider skipped segments to calculate next media sequence (#5414 ) (b7d2305 )
HLS: don't do sequence mode workaround unless there's a text stream (#5079 ) (fb22669 )
HLS: Don't do sequence mode workaround unless there's a text stream (#5315 ) (019dcfd )
HLS: Fix AV sync over ad boundaries (#4824 ) (35033bb ), closes #4589
HLS: Fix avoid prefetch missing segments (#5372 ) (7f8e051 )
HLS: Fix detection of Media Playlist for audio and video only in MP4 (#4803 ) (76f96b9 )
HLS: Fix detection of WebVTT subtitles in HLS by extension (#4928 ) (15b0388 ), closes #4929
HLS: Fix discontinuity tracking (#4881 ) (fc3d5c1 ), closes #4589
HLS: Fix dvh1 and dvhe detection as video codec (#5364 ) (37b7be6 )
HLS: Fix external subtitles out of sync in HLS (#5491 ) (de19884 )
HLS: Fix HLS seekRange for live streams (#5263 ) (258962f )
HLS: fix lazy load with multiple raw audio tracks (#4715 ) (76149ae )
HLS: Fix live playlist update when using no LL in a LL stream (#5282 ) (ad2eef6 )
HLS: Fix load of LL-HLS when the partial segment is not independent (#5277 ) (ed5915e )
HLS: Fix lowLatencyPresentationDelay when using autoLowLatencyMode (#4712 ) (877e954 )
HLS: Fix missing roles (#4760 ) (2bc481d ), closes #4759
HLS: Fix prefetch with LL-HLS stream (#5274 ) (551422a )
HLS: Fix seek on LL streams when using segments mode (#5283 ) (d4f3f5c )
HLS: Fix seekRange for EVENT playlist not using EXT-X-PLAYLIST-TYPE (#5220 ) (1c89204 )
HLS: Fix support for mixed AES-128/NONE decryption (#4847 ) (452694d )
HLS: Fix support legacy AVC1 codec used in HLS (#4716 ) (c3ff8e5 )
HLS: Fix support of fragmented WebVTT (#5156 ) (9c4a61f )
hls: Fix type error in lazy-loading (#4687 ) (28b73b9 )
HLS: Ignore segments with zero duration (#5371 ) (c25b26a )
HLS: IMSC1 subtitles not working in a HLS stream (#4942 ) (974f5dc )
HLS: Mark first partial segment as independent always (#5312 ) (ea896d5 )
HLS: Parse EXT-X-PART-INF as media playlist tag (#5311 ) (d29f4bc )
HLS: Parse the correct codec for AVC and MP4A in HLS parser (#5515 ) (f3fa4f8 )
HLS: preserve discontinuitySequence in SegmentIndex#fit (#5066 ) (36a15f6 )
HLS: Report HLS playlist updates as media playlist in network filters (#5120 ) (c2a59d0 )
HLS: Require SegmentIndex to return independent segments only (#5288 ) (9f80e3c )
HLS: Single alternative video renditions not working (#4785 ) (6915a97 )
HLS: Skip EXT-X-PRELOAD-HINT without full byterange info (#5294 ) (32d141d )
HLS: support discontinuities in segments mode (#5102 ) (71affe7 )
HLS: Supports syncTime in partial segments (#5280 ) (9dddc09 )
Increase IndexedDB timeout (#4984 ) (ea290ab )
logging: Simplify log code. (#5050 ) (6944976 ), closes #5032
Make encoding problem detection more robust (#4885 ) (0e3621c ), closes #4589
Manually order key for decodingInfo cache (#4795 ) (806a9a8 )
MCap: Remove robustness when robustness value is default (#4953 ) (7439a26 )
media source object URL revocation (#5214 ) (fecb11a )
media: Fix region checking in livestreams (#5361 ) (9fffcb9 ), closes #5213
mitigate uncaught type error in media_source_engine (#5069 ) (e19fa80 ), closes #4903
net: Fix HEAD requests in new Chromium (#5180 ) (5155493 ), closes #5164
Only parse/probe TS if the reference is not an MP4 and not WebM (#5381 ) (b1e7cc4 )
Orange set top box is incorrectly categorized as Apple (#5545 ) (937484e )
PERIOD_FLATTENING_FAILED error with shaka 4.3.4 that did not occur with shaka 3.1.2 #5183 (#5188 ) (e855326 )
Polyfill missing AbortController on Tizen (#4707 ) (75ef975 )
Populate HDR correctly (#5369 ) (1ad75ec )
prevent access to null config_ in SimpleAbrManager (#5362 ) (d1db694 )
Prevent bad calls to MediaSource.endOfStream (#5071 ) (64389a2 ), closes #5070
Prevent content from being restarted after Postroll ads (#4979 ) (64e94f1 ), closes #4445
prevent memory leak in SimpleAbrManager while destroying (#5149 ) (bbf228c )
Reject TS content on Edge (#5043 ) (8818a02 )
Release region timeline when unloading (#4871 ) (a236180 ), closes #4850
Remove duplicate adaptation event before init (#5492 ) (e3b2e7d )
Remove sourcebuffer before create a new media source instance (#5533 ) (0056c0a )
Ship to NPM without node version restrictions (#5253 ) (524a80b ), closes #5243
stream property of request context obfuscated in production builds (#5118 ) (93baba2 )
Support fLaC and Opus codec strings in HLS (#5454 ) (ccc3d2f ), closes #5453
Sync each segment against EXT-X-PROGRAM-DATE-TIME (#4870 ) (50c9df4 ), closes #4589
Tizen video error fixed by checking the extended MIME type (#4973 ) (eb01c60 ), closes #4634
Transmux containerless to the correct mimetype (#5205 ) (bb40d3b )
Treat regions uniquely (#4841 ) (5681efe ), closes #4839
TTML: Add font-family mapping (#4801 ) (db8987d )
TTML: Fix duplicate cues overlapping segment boundaries (#4798 ) (bd75032 ), closes #4631
Typing of PeriodCombiner.Period was incorrect (#5442 ) (845649b )
ui: Avoid submitting form if player is inside form (#4866 ) (da21850 ), closes #4861
ui: Check event cancelable before event.preventDefault (#4690 ) (6d8de72 )
UI: Disable right click on range elements (#5497 ) (3333ca4 )
ui: Fix iOS fullscreen on rotation (#4679 ) (86256f4 )
UI: Fix playback restarts in safari when click on seekbar end (#5527 ) (4235658 )
UI: Fix resolution selection on src= (#5367 ) (3863c73 )
UI: Suppress error log from fullscreen button on desktop (#4823 ) (99da4ce ), closes #4822
UI: Use pagehide instead of unload for PiP (#5303 ) (a543b80 )
unnecessary parsing of in-band pssh when pssh is in the manifest (#5198 ) (05aa931 ), closes #5197
Update karma-local-wd-launcher to fix Chromedriver >= 115, fix M1 mac (#5489 ) (c8a27ca )
Update karma-local-wd-launcher to fix Edge >= 115 (#5506 ) (3104a76 )
VTT: Fix combining style selectors (#4934 ) (128562d )
VTT: Fix spacing between text lines (#4961 ) (2d0469f )
WebVTT: Add support to , and (#4920 ) (726ef42 )
WebVTT: Add support to middle position (#5366 ) (5691d5e )
WebVTT: Fix horizontal positioning with cue box size (#4949 ) (f456318 )
WebVTT: Fix text-shadow in WebVTT not working (#5499 ) (ac6a92a )
WebVTT: Fix voice tag styles (a5f8b43 )
WebVTT: Fix voices with styles and support to multiple styles (#4922 ) (68968c1 )
WebVTT: Tags in the WebVTT subtitle are not parsed (#4960 ) (d4fc54f )
Performance Improvements
Caching mediaSource support for browser engine (#4778 ) (ad6c085 )
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