[mythtv] [mythtv-users] Removing support for CEA-608 teletext subtitles

[Jim Stichnoth]

On Sat, Jul 27, 2013 at 10:33 AM, Stuart Morgan <stuart at tase.co.uk> wrote:

> **
>
> On Saturday 27 Jul 2013 17:48:27 Ken Smith wrote:
>
> > Jim Stichnoth wrote:
>
> > > We are planning to remove MythTV support for CEA-608 based teletext
>
> > > captions/subtitles, as of the 0.27 release. That is to say, 0.26 will
>
> > > be the last release with CEA-608 teletext support.
>
> > >
>
> > > Note that this has nothing to do with DVB teletext that is commonly
>
> > > used in Europe. It also has nothing (or at least little) to do with
>
> > > VBI-based CEA-608 closed captions which are provided by U.S.
>
> > > broadcasters and set-top box analog output.
>
> > >
>
> > > The main reason for removal is that there doesn't seem to be any
>
> > > content currently produced with such subtitles, and hasn't been for a
>
> > > very long time, and so the code to maintain decoding and rendering
>
> > > support is all guesswork that complicates the rest of the code.
>
> > >
>
> > > If anyone has samples containing CEA-608 teletext captions, or has
>
> > > other concerns about this decision, please let me know.
>
> > >
>
> > > Jim
>
> >
>
> > Hi Jim/lists
>
> >
>
> > I have a number of recordings made prior to the demise of Teletext in
>
> > the UK who's subtitles it would be good to be able to show. I don't know
>
> > about practice elsewhere, but, in the UK, Teletext page 888 was used to
>
> > carry the subtitles. Would it be possible to retain the playback
> capability?
>
>
>
> As Jim said, CEA-608 subtitles have nothing to do with Teletext and no-one
> is proposing the removal of Teletext support.
>
>
Right.  CEA-608 Teletext is an old, obscure, almost never used corner of
CEA-608.  Its support complicated the code and was not possible to test
since no one could produce any samples.

Jim
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