[FFmpeg-devel] [RFC] DVB teletext and PTS

Michael Niedermayer michaelni at gmx.at
Mon Sep 24 19:57:35 CEST 2012

On Mon, Sep 24, 2012 at 07:08:24PM +0200, Reimar Döffinger wrote:
> On Mon, Sep 24, 2012 at 03:02:32PM +0200, Wolfram Gloger wrote:
> > Reimar Döffinger <Reimar.Doeffinger at gmx.de> writes:
> > 
> > > when specifying PTS handling for DVB teletext they made quite a mess it
> > > seems (see Annex A of ETSI EN 300 472), which resulted in some stations
> > > not using sensible PTS values (for example for ORF the teletext PTS
> > > values seem to indicate a time multiple hours after the video time,
> > 
> > Sorry for entering late -- I've seen this (teletext PTS arbitrarily far
> > from audio/video) for ages.  German stations often share the same
> > teletext stream for several completely different programs, so the
> > absolute timestamps are completely meaningless, unless you're watching
> > the 'main program' of the bouquet.
> I don't think this can be quite that way, they can't be sharing
> teletext subtitles across all programs.

and i always had the feeling they are sending the same thing on all
the channels all the time ... ;)

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Old school: Use the lowest level language in which you can solve the problem
New school: Use the highest level language in which the latest supercomputer
            can solve the problem without the user falling asleep waiting.
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