This is a preview release of version 1.0. It is feature complete and intended for testing purposes.

Changes Since Last Release

Only resync playback with live streams if the buffer is starved or playback is behind liveMaxLatencyDuration or liveMaxLatencyDurationCount - #3603
Fix currentLevel and getAppendedFrag with alt-audio streams - #3621 closes #3602
Cleanup hls.destroy() and called detroy() on loaders before freeing - #3628 resolves #2104, relates to #3605 and #3606
Fix non-fatal error handling of invalid startLevel index - #3641 fixes #3618
Update nextLoadPosition right before loading a fragment or part - #3646
Add CONTRIBUTING and MIGRATING files #3645
CICD Updates - #3613, #3622

New Features

Apple Low-Latency HLS support
Improved support for redundant variants with tracks
Improved audio and subtitle track selection with multiple media and stream variants containing different GROUP-ID values
Progressive streaming option (experimental)

New config options:
- backBufferLength config applies to Live and VOD content. liveBackBufferLength is still supported but marked as deprecated.
- lowLatencyMode - set to false to disable Low-latency part loading and target latency playback rate adjustment
- progressive- (experimental) set to true to stream and append loaded audio and video data before each segment load completion. It is not recommended for production or small segments with only a single GoP or less.
Event order and content have changed in some places. See Breaking Changes below, and please report any issues with breaking changes that impact your integrations
hls.audioTracks and hls.subtitleTracks as well as AUDIO_TRACKS_UPDATED and SUBTITLE_TRACKS_UPDATED events only list tracks in the active level's audio/sub GROUP-ID after LEVEL_LOADING - #3293
Added groupId to audio and subtitle track loading and loaded events
Added additional error details to help identify the source of certain network error events:
- SUBTITLE_LOAD_ERROR
- SUBTITLE_TRACK_LOAD_TIMEOUT
- UNKNOWN
The FRAG_DECRYPT_ERROR event is no longer emitted and is instead surfaced as a FRAG_PARSING_ERROR

See the new MIGRATING guide for API changes between v1.0 and v0.14.

TTFB is factored into overall bandwidth and can impact quality selection when streaming smaller segments or LL-HLS parts #3563

To provide feedback please a bug report or feature request via the issue tracker.

If you do file an issue, please include a test stream, and consider contributing to #3065.