[FFmpeg-soc] expand filter (alternative to pad syntax)

[compn]

vmrsss <vmrsss at ...> writes:

> (3) I have added the possibility of specifying a color for the  
> padding. The structure which lists the colors is taken from  
> vf_drawbox.c. If people like the idea, that can easily be factored out  
> in some avfilter_common file.

if you mean that we can have colored letterboxing (instead of black frame, we 
can have blue frame) this is an old wishlist of vf expand :)

-compn