[FFmpeg-devel] [PATCH] libavfilter-soc: implement pad filter
Tue Apr 28 12:33:32 CEST 2009
I am glad you resurrected this, well done. Apart lacking RGB support,
the way I remember it is that the filter worked well, but Michael
wanted memcpy removed in favour or direct rendering and I did not know
how to achieve that. (Also, at the time some necessary info about the
input stream was missing from the AVFilter structures, but this might
not be the case now.)
PS. Besides the padcolor option (yes, it would be nice to extract some
of the code I had written to a colourutil.[hc]), I still think that
some of the other options I had originally considered add flexibility
and although not vital may still be useful, in particular:
w / h = - N or h=-N to enlarge by N pixels
a = r to require expansion to fit a particular aspect ratio (rather
pad=w=-32:a=16/9 (enlarge width by 32 pixel and then height
as required to yield overall aspect ratio 16/9).
pad=w=-32:a=-1 (enlarge width by 32 pixel and then height
as required to keep original aspect ratio).
I suppose the first form you could write as "pad=w=-32:h=w*9/16",
which is very pretty, how about the second?
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