[FFmpeg-devel] [PATCH] write AC-3 metadata
Fri Dec 31 14:31:18 CET 2010
> clean effects ? This field indicates that the referenced
> program element has no language.
> hearing impaired ? This field indicates that the
> referenced program element is prepared for the hearing
> visual_impaired_commentary ? This field indicates that the
> referenced program element is prepared for the visually
> impaired viewer.
For what it's worth, I've never seen anyone use anything other
than "undefined" for that field in MPEG-2 systems. Visual Impaired
commentary uses the country code "NAR" over here in the UK.
AC-3 metadata can be placed in AAC through "Dolby Pulse" but we
don't have any samples to see how that's done.
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