On 3/18/18, Hendrik Leppkes <h.lepp...@gmail.com> wrote: > 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? :)
There must be flag, which is ignored. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
