[FFmpeg-devel] [PATCH] avcodec: add minimal teletext subtitle decoder

Aman Gupta ffmpeg at tmm1.net
Thu Apr 26 07:17:20 EEST 2018

On Wed, Apr 25, 2018 at 6:15 PM Marton Balint <cus at passwd.hu> wrote:

> On Thu, 26 Apr 2018, Carl Eugen Hoyos wrote:
> > 2018-04-25 4:07 GMT+02:00, Aman Gupta <ffmpeg at tmm1.net>:
> >
> >> Processes only teletext pages marked as subtitles, so
> >> depending on the stream it might not produce any output.
> >
> > Shouldn't there be at least an option to output whatever
> > page was requested?
> >
> > +1 for not needing an external dependency.
> Why? Libzvbi is LGPL. We might as well include *that* in the ffmpeg
> codebase...

I was under the impression that libzvbi was GPL2 like the rest of zapping.
If I had known it was LGPL I probably wouldn't have gone down this route.

It might make sense to merge this back into the zvbi based decoder, but
I've never used zvbi so I'm not sure how it compares to the features I've
implemented here. I will try to find some time to investigate, but to be
honest this version is working very well for my needs and I'm not
particularly motivated to add a dependency to my project.


> I thought having a decoder which is inferior in features to an existing
> one or re-inventing yet something again in ffmpeg code are two things we
> are trying to avoid.
> Regards,
> Marton
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