On Sun, Mar 18, 2018 at 9:26 AM, wm4 <nfx...@googlemail.com> wrote: > On Sat, 17 Mar 2018 20:46:50 +0100 > Martin Vignali <martin.vign...@gmail.com> wrote: > >> Hello, >> >> Patch in attach change premultiply/unpremultiply filter for RGB input >> to process it at full range >> >> Avoid very strange result in unpremultiply mode >> >> To test : >> ./ffmpeg -i ./fate-suite/mov/mov_alpha_premult.mov -vf >> unpremultiply=inplace=1 resStraight.png -y >> >> ./ffmpeg -i ./fate-suite/mov/mov_alpha_premult.mov -vf >> format=gbrap16,unpremultiply=inplace=1 resStraight16.png -y > > I thought all alpha in ffmpeg is "straight" (not premultiplied). Was I > lied to?
If you pre-multiplty the alpha and then save it as a file, how it is supposed to know that you did that? :) - Hendrik _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
