Welcome to the first alpha release of v1.0.0! This is an early preview release of version 1.0. While not feature complete, it does include a pretty extensive refactor and a portion of the Apple Low-Latency support that will be more feature complete in beta and release versions.

Alpha releases for v1.0.0 will be cut from the feature/v1.0.0. You can leave feedback on the changes or based on your testing in #3072 or in new issues. Make sure to reference that PR.

New Features

• Apple Low-Latency manifest and playlist handling
  • Low-latency HLS Manifest parsing
  • Playlist Request Query Parameters (Blocking Reload with Delivery Directives)
  • Playlist Delta Updates
  • CDN Tune-in
• Basic IMSC1 support (experimental)

Demo Page

• LL-HLS Parts are displayed in the timeline

API Changes

• Set lowLatencyMode to true to enable LL-HLS playlist part refreshes
• Set progressive to true to enable segment streaming with fetch loader (experimental)
• Event order and content has changed with the refactor. See Breaking Changes below and please report any issues with breaking changes that impact your integrations.

Breaking Changes

• Promise support is now required. Please bring your own polyfill
• The stats object has changed
  • trequest, tfirst, tload have been replaced by loading: HlsProgressivePerformanceTiming
  • tparsed has been replaced by parsing: HlsProgressivePerformanceTiming
• On the Fragment object:
  • hasElementaryStream function has been removed
  • setElementaryStream and _elementaryStreams have been renamed (these are only for internal use)
• BUFFER_CODECS data has changed from { tracks: { video?, audio? } } to simply { video?, audio? }
• BUFFER_APPENDING data has changed from { type, data, parent, content } to { type, data, frag, chunkMeta }
• BUFFER_APPENDED data has changed
• Event binding should remain unchanged using the public API, but refer to #2395 if experiencing issue with changes to event constants.

Known Issues

• Low-latency playback is not yet supported (part loading, rendition reports, playback rate controller). For progress see https://github.com/video-dev/hls.js/projects/7