[FFmpeg-devel] [RFC] Affine video transformation filter

Nicolas George nicolas.george at normalesup.org
Sun Jul 8 16:41:53 CEST 2012

L'octidi 18 messidor, an CCXX, Michael Niedermayer a écrit :
> a background description could be added to AVFilterBufReference and
> passed on, so for example a underwater video could use blue a
> video of outer space black. Or one might even want to specify that
> the samples outside the reference rectangle be used when addressable
> or one could use the nearest sample from within the rectangle

The background color was just an example, and we probably do not want to
include a new field for every situation.

My first suggestion would be to let the user specify options that apply to
all filters in the graph: if a filter knows an option with that name, it
uses it, if not the option is ignored for this filter (and if an option is
not known by any filter, print a warning).

But there may be drawbacks to that solution.


  Nicolas George
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