Closed Captioning & Subtitling Standards
Page 2 of 2: Explore 31 curated Closed Captioning & Subtitling Standards resources in Standards & Industry — tools, guides, and references for video developers on Awesome Video.
About this collection
Closed Captioning & Subtitling Standards is a focused collection within Standards & Industry, with 31 curated resources.
Resources
- TTML Live Extensions ModuleW3C spec for live TTML/EBU-TT-Live subtitle streaming extensions, niche companion to IMSC.
- TTML to WebVTT Mapping (W3C)Official W3C spec repository defining mapping between TTML and WebVTT caption formats.
- ttml2ssaConverts TTML/DFXP/VTT/SRT subtitle formats (as used by Netflix, HBO, Disney+, Prime) into SRT/SSA formats.
- ttml2vttSingle-file XSLT stylesheet converting TTML/DFXP captions to WebVTT, no dependencies beyond xsltproc.
- W3C IMSC Test SuiteOfficial IMSC1 conformance test suite; several tests double as EBU-TT-D conformance tests.
- W3C TimedText Wiki: Efforts and Specifications IndexCommunity-maintained index mapping the lineage and relationships of TTML, IMSC, EBU-TT-D, SMPTE-TT and WebVTT along with known implementati…
- w3c/imsc (imscJS & imscHRM)Reference repo for the IMSC TTML profiles, hosting imscJS (web renderer/polyfill) and imscHRM (Hypothetical Render Model validator).