[FFmpeg-user] missing a selected frame

[Nicolas George]

Moritz Barsnick (12019-07-19):
> I'm not sure whether expressions actually work with string values,
> though.

The expression parser is very limited and hard to extend. Furthermore,
its API is very inconvenient. If somebody were to rewrite it from
scratch, it would be a great progress. (But do not start without
discussing the design.)

Regards,

-- 
  Nicolas George
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