Andreas Tai

IMSC is the Internet Media Subtitle and Caption Profile of the W3C Timed Text Markup Languages. The presentation will show how to combine different open source tools to create, render and validate IMSC subtitles. The focus will be on an open-source editor for IMSC.

The TTML Profile for Internet Media Subtitles and Captions (IMSC) is the most promising candidate for a long awaited harmonized subtitle format for the Web. The open source library imscJS is not only a polyfill to render IMSC subtitles in the browser: as an open reference implementation it is a blueprint how to integrate IMSC subtitles in other open source projects e.g. in video players. The presentation will show how imscJS parses and renders IMSC subtitle files, where imscJS is already used and how the open source ecosystem for subtitles could benefit from it in the future.

Since the talk "Open source tools for new subtitle standards" at Fosdem 2015 important subtitle standards like the Timed Text Markup Language have got more attraction because of adoption in open source projects.This includes reference material, DASH packager, video players, live subtitle frameworks or reference renderer. The talk will give an overview what is available, the maturity of implementations and how you can make use of them in your media workflow.

Open Source software can play a critical role for the roll-out of broadcast standards. This is also true for new caption and subtitle standards. The focus on the presentation will be on the OS Subtitle Conversion Framework (SCF). SCF consists of different software modules that aim at a faster and conformant adoption of the EBU-TT standard, an XML based subtitle standard defined by the EBU. Apart from SCF also other OS software that are important for the implementation of subtitles standards will be discussed (e.g. mp4box from GPAC or the WebVTT parser from Anne van Kesteren).