[FFmpeg-devel] Status and Plans for Subtitle Filters

[Marton Balint]

On Sun, 23 Feb 2020, Nicolas George wrote:

> Michael Niedermayer (12020-02-23):
>> really ?
>> just hypothetically, and playing the devils advocat here.
>> what would happen if one problem or set of problems is solved at a time ?
>
> Odds are a design decision made early would prove insufficient to solve
> a later problem.
>
>> what happens if you forbid overlapping ?
>
> We break perfectly valid subtitles. Unlike B-frames, overlapping
> subtitles is part of the semantic.

Two overlapping subtitles can be broken into 3 non-overlapping subtitles, 
the middle one containing both the rectangles of the two. The same can be 
done for more overlaps in a similar fashion.

Regards,
Marton