Common Media Library (CML)

Developed by the SVTA's Players and Playback Working Group, the CML is an open-source project aimed at building a standard set of player functionalities deployable across different JavaScript players. It helps reduce individual player development efforts and ensures consistent fu

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Related resources

• SVTA LabsStreaming Video Technology Alliance GitHub org hosting spec implementations (Common Media Library, LiveSim2, Sandbox) under MIT license.
• Recent Standard Development Activities on Video Coding for MachinesAcademic paper documenting the MPEG Video Coding for Machines (VCM) ad-hoc group's standardization process.
• Encrypted Media Extensions (EME) — W3C Working DraftOfficial W3C spec for EME, the browser API for DRM-protected playback control (MediaKeys, encryptionScheme detection, getStatusForPolicy).
• CTA WAVE Technical Working GroupLive issue tracker and spec repo showing real working-group deliberation on WAVE/HbbTV/ATSC interoperability.
• IMSC 1.2 — TTML Profiles for Internet Media Subtitles and CaptionsLatest stable W3C spec text for IMSC 1.2, the base standard behind most subtitle delivery in streaming.
• Video Coding Experts Group (VCEG)Overview of ITU-T's Video Coding Experts Group and its joint work with MPEG (JVET) developing codecs beyond VVC.
• Netflix Timed Text Style GuidesNetflix's official hub of subtitle/caption style guide requirements and per-language templates, an industry-standard captioning reference.
• MPEG-5 Standards Overview (EVC & LCEVC)Overview of MPEG-5 Part 1 (EVC) and Part 2 (LCEVC) codec standards with links to specifications.
• MPEG Basics (Chiariglione)Explanation of MPEG standardization process and organizational structure by MPEG founder Leonardo Chiariglione.
• Disney Dolby Vision Best Practices Guide v1.3.1Official Disney mastering spec detailing Dolby Vision L0/L1/L2/L5/L6/L8 metadata layers and trim requirements per content type.
• SMPTE ST 2110 — Professional Media over Managed IP NetworksOfficial SMPTE standard page for ST 2110, the professional media-over-IP suite (2025 Emmy-winning standard with EBU and VSF).
• AIMS Alliance (Alliance for IP Media Solutions)Industry alliance driving adoption of open IP standards (SMPTE ST 2110, NMOS) for professional media infrastructure interoperability.
• HbbTV Reference ApplicationMIT-licensed reference DASH player with PlayReady/Marlin/ClearKey test material including cbcs streams, from the official HbbTV Association.
• Dolby.io Media APIs — Developer ToolsOfficial Dolby.io reference documentation for Media APIs developer tooling.
• MovieLabs Production Technology SpecificationsConcrete specification documents (Ontology for Media Creation, Media Creation Cloud, security architecture) supporting the 2030 Vision for…