A .sami file is the same Synchronized Accessible Media Interchange caption document as .smi, written with the long form of the extension. The contents are identical — <SYNC Start=…> elements inside an HTML-like SAMI document — and the long extension is chosen mainly to avoid colliding with SMIL files, which also claim .smi.
Batch files can each use a different output. Nothing uploads for local conversions.
Working inputs include camera RAW, browser-local audio/video, PDF, CBZ/CBR comics, office documents, ebooks, markup, 3D models, structured text, images, and archives.The .smi extension SAMI inherited from Microsoft is also used by SMIL presentations, and the resulting ambiguity led some tools and archives to adopt the unambiguous .sami spelling. Both have been in circulation since the format's Windows Media era, with .sami appearing more often in library and archive workflows where extension collisions cause real problems.
Players that read SAMI generally accept .sami as well, though a few match on .smi alone. Novus Convert treats the two identically, running the same hardened SAMI parser — no document types, no external entities, script and style content stripped — and exports any of the twelve timed-text targets.
As with .smi, the style block and language classes describe presentation; only cue timing and text are carried into other formats.
