You can safely require this library in Node and absolutely nothing will happen. Server-side-rendering (SSR) and require from a Node.js runtime MP3 elementary stream audio in IE and Edge (FairPlay legacy keys (For .1_0 use native Safari playback).FairPlay, PlayReady, Widevine DRM with MPEG-2 TS segments.#EXT-X-I-FRAME-STREAM-INF I-frame Media Playlist files.Advanced variant selection based on runtime media capabilities (See issues labeled media-capabilities). ![]() Codec support is dependent on the runtime environment (for example, not all browsers on the same OS support HEVC). #EXT-X-BITRATE (Not used in ABR controller)įor a complete list of issues, see "Top priorities" in the Release Planning and Backlog project tab.The following tags are added to their respective fragment's attribute list but are not implemented in streaming and playback. Skips playback of unbuffered program containing only GAP content and no suitable alternates. #EXT-X-GAP (Skips loading GAP segments and parts.#EXT-X-DEFINE: Variable Import and Substitution ( NAME,VALUE,IMPORT,QUERYPARAM attributes).#EXT-X-KEY: ( METHOD=SAMPLE-AES is only supports with MPEG-2 TS segments).The following properties are added to their respective variants' attribute list but are not implemented in their selection and playback. #EXT-X-DEFINE: Variable Substitution ( NAME,VALUE,QUERYPARAM attributes).#EXT-X-CONTENT-STEERING: Content Steering.#EXT-X-SESSION-KEY: EME Key-System selection and preloading.Recovery actions can be triggered fix fatal media or network errorsįor details on the HLS format and these tags' meanings, see Multivariant Playlist tags.Retry mechanism embedded in the library.Playback session metrics are also exposed.All internal events can be monitored (Network Events, Video Events).Ability to seek in buffer and back buffer without redownloading segments.Accurate Seeking on VoD & Live (not limited to fragment or keyframe boundary).In Auto-Quality mode, emergency switch down in case bandwidth is suddenly dropping to minimize buffering.Bandwidth conservative switching (quality switch change for next loaded fragment, without flushing the buffer).Smooth switching (quality switch for next loaded fragment).Instant switching (immediate quality switch at current video position).3 Quality Switching modes are available (controllable through API means).Alternate Audio Track Rendition (Master Playlist with Alternative Audio) for VoD and Live playlists.Level capping based on HTMLMediaElement resolution, dropped-frames, and HDCP-Level. ![]() FairPlay, PlayReady, Widevine CDMs with fmp4 segments.Encrypted media extensions (EME) support for DRM (digital rights management).SAMPLE-AES decryption (only supported if using MPEG-2 TS container).Timed Metadata for HTTP Live Streaming (ID3 format carried in MPEG-2 TS, Emsg in CMAF/Fragmented MP4, and DATERANGE playlist tags).MPEG Audio container (MPEG-1/2 Audio Layer III audio only streams).Packetized metadata (ID3v2.3.0) Elementary Stream.ATSC A/52 / AC-3 / Dolby Digital Elementary Stream.ISO/IEC 11172-3 / ISO/IEC 13818-3 (MPEG-1/2 Audio Layer III) Elementary Stream.ISO/IEC 13818-7 ADTS AAC Elementary Stream.H.264 and ISO/IEC 14496-10 Elementary Stream Rollup is used to build the distro bundle and serve the local development environment. HLS.js is written in ECMAScript6 ( *.js) and TypeScript ( *.ts) (strongly typed superset of ES6), and transpiled in ECMAScript5 using Babel and the TypeScript compiler. ![]() HLS.js works directly on top of a standard HTML element. HLS.js also supports HLS + fmp4, as announced during WWDC2016. Transmuxing is performed asynchronously using a Web Worker when available in the browser. It works by transmuxing MPEG-2 Transport Stream and AAC/MP3 streams into ISO BMFF (MP4) fragments. It relies on HTML5 video and MediaSource Extensions for playback. HLS.js is a JavaScript library that implements an HTTP Live Streaming client.
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