[FFmpeg-devel] [PATCH v3 00/18] Subtitle Filtering

[Nicolas George]

Hendrik Leppkes (12021-09-11):
> Actually I would want to see subtitles to fully move into AVFrames
> before any filtering, if at all, and not half-assed. That means fully
> convert avcodec, deprecate AVSubtitle entirely (and not just shove it
> into AVFrame->data), and make them a first-class citizen inside
> AVFrame.
> Doing it half-assed just for filtering now binds us into that chosen
> API for years, and thats something we should try to avoid when we can
> do it properly right from the start.
> 
> This can (and should) be done independent of filtering (in other
> words, avfilter doesn't necessarily need to accept subtitle frames
> yet), but it needs to be done *before* filtering, because you would be
> fundamentally re-defining the subtitle storage for years to come.
> Some developers have started work on this before, but due to time
> constraints it mostly got stuck in WIP phases.

Thank you very much, this is my mind exactly, and it reflects my
objection on the format negotiation in libavfilter.

I would welcome somebody working on making our subtitles API clean and
usable. What I do not welcome is somebody rushing to a solution by
skipping necessary steps. It will give something that works now, but at
the cost of making it much harder to extend it later.

Regards,

-- 
  Nicolas George
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