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Date: Sat, 29 Nov 2014 22:43:35 +0900
From: Akihiro TSUKADA <tskd08@gmail.com>
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To: David Liontooth <lionteeth@cogweb.net>
CC: Linux Media Mailing List <linux-media@vger.kernel.org>
Subject: Re: ISDB caption support
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> I realize captions is an application-layer function, and intend to work
> with the CCExtractor team. Do any other applications already have ISDB
> caption support?

there's a mplayer patch for subtitle support:
https://github.com/0p1pp1/mplayer/commit/6debc831d34cad98d1b251920fbdb48f74a880df

It translates subtitle stream PES to ASS, but is is for ISDB-T/Japan.
Subtitling in ISDB-T depends heavily on the control sequences
of the original character encoding (ARIB STD-B24),
so I'm afraid that (at least) PES format is very different in ISDB-Tb. 

regards,
akihiro