[Accessibility_sig] Info regarding closed captions in iTunes 7.4

[James Craig]

The following is from an Apple developer on the iTunes team. It was a
response to my question about documentation of the supported formats
of captioned video.

-- original follows --

"The Closed Caption implementation in QuickTime (which is utilized by
iTunes 7.4) is a very new feature (it first appeared in QuickTime
7.1.6)  It is not SMIL based and currently, the only tool that Apple
sells that can create the content is Compressor (it does so by
ingesting an industry standard file format called Scenarist Closed
Caption or .scc).  My understanding is that a product called
MacCaption (google it) has recently added QuickTime CC support to
their most recent beta.  As with any new format in QuickTime, it takes
a little bit of time for the applications that utilize QuickTime to
adopt the new features we add and then a little bit more time before
content begins showing up.  iTunes is an early adopter of this feature
so that it will be ready when the content authors start producing
their content."