Anton Khirnov (12023-04-29):
> libavfilter is a C library with a C API. Any structured output from
> filters should be in the form of a C object, typically a struct. I do
> not see why are you so in love with strings, they make for terrible
> APIs.

Yes, strings are a terrible API, but our project is not only a set of
libraries, it is also a set of command-line tools, and command-line
tools work with strings and nothing else.

-- 
  Nicolas George