HTML5 and Video

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HTML5 and Video mhv/2018 Mark Vickers Organizations Related to Media Web Standards • World Wide Web Consortium (W3C) – https://www.w3.org • Web Hypertext Application Technology Working Group (WHATWG) – https://whatwg.org • Web Application Video Ecosystem (WAVE) – https://cta.tech/Research-Standards/Standards-Documents/WAVE-Project/WAVE-Project.aspx mhv/2018 2 W3C and WHATWG Media Specs • Overview of Media Technologies for the Web – http://w3c.github.io/web-roadmaps/media/ • Video | Web Fundamentals | Google Developers – https://developers.google.com/web/fundamentals/media/video • HTML Standard – https://html.spec.whatwg.org/multipage/media.html#media-elements • Media Source Extensions – https://www.w3.org/TR/media-source/ • Encrypted Media Extensions – https://www.w3.org/TR/encrypted-media/ • WebRTC 1.0: Real-time Communication Between Browsers – https://www.w3.org/TR/webrtc/ • W3C Media and Entertainment Interest Group – https://www.w3.org/2011/webtv/ • Media Timed Events TF – https://www.w3.org/2011/webtv/wiki/Main_Page/Media_Timed_Events_TF mhv/2018 3 CTA WAVE • WAVE NAB Presentation – https://cta.tech/cta/media/Standards/NAB-Show-2018-WAVE-StreamlininG-StreaminG-FINAL.pdf • Web Media API Snapshot 2017 – https://www.w3.org/2017/12/webmediaapi.html mhv/2018 4 Some New Media Specs in Development at W3C • W3C Web Platform Incubator Community Group (WICG) – https://www.w3.org/community/wicg/ • Media Capabilities – https://wicg.github.io/media-capabilities/ • MSE: Codec Switching – https://github.com/wicg/media-source/blob/codec-switching/codec-switching-explainer.md • EME: encryption-scheme – https://github.com/WICG/encrypted-media-encryption-scheme • EME: persistent-usage-record sessions – https://github.com/WICG/encrypted-media • EME: hdcp-detection – https://github.com/WICG/hdcp-detection mhv/2018 5.

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Document Object Model
Document Object Model Copyright © 1999 - 2020 Ellis Horowitz DOM 1 What is DOM • The Document Object Model (DOM) is a programming interface for XML documents. – It defines the way an XML document can be accessed and manipulated – this includes HTML documents • The XML DOM is designed to be used with any programming language and any operating system. • The DOM represents an XML file as a tree – The documentElement is the top-level of the tree. This element has one or many childNodes that represent the branches of the tree. Copyright © 1999 - 2020 Ellis Horowitz DOM 2 Version History • DOM Level 1 concentrates on HTML and XML document models. It contains functionality for document navigation and manipulation. See: – http://www.w3.org/DOM/ • DOM Level 2 adds a stylesheet object model to DOM Level 1, defines functionality for manipulating the style information attached to a document, and defines an event model and provides support for XML namespaces. The DOM Level 2 specification is a set of 6 released W3C Recommendations, see: – https://www.w3.org/DOM/DOMTR#dom2 • DOM Level 3 consists of 3 different specifications (Recommendations) – DOM Level 3 Core, Load and Save, Validation, http://www.w3.org/TR/DOM-Level-3/ • DOM Level 4 (aka DOM4) consists of 1 specification (Recommendation) – W3C DOM4, http://www.w3.org/TR/domcore/ • Consolidates previous specifications, and moves some to HTML5 • See All DOM Technical Reports at: – https://www.w3.org/DOM/DOMTR • Now DOM specification is DOM Living Standard (WHATWG), see: – https://dom.spec.whatwg.org
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