THnaks Michael, Yes I will try to see arround OpenGL
For Ronald, excuse me in my picture, the result was merged because of mail spacing.. I drew two images one beside the other. Cheers Gilles 2011/2/18 michael chua <[email protected]> > I'm not sure libav is the place to look for this sort of > post-processing functionality. This is the sort of question I would > expect to see on a mailing list for shaders, particularly pixel > shaders, or a graphics API like OpenGL. > > On Fri, Feb 18, 2011 at 12:56 AM, Gilles Maire <[email protected]> > wrote: > >> > >> > >> Might seem incredibly simple, but it's actually not, because how do > >> you decide which pixels to keep and which to add? Simple filters do > >> overlay-add, which means black pixels are considered "zero" and white > >> "one", and then you "add" the signal of each color component in each > >> pixel up. Obviously this only works in lab situations (e.g. think of > >> microscope images in green/red/blue channel, adding them up gives a > >> color image, as in Nature papers etc.), it would double the brightness > >> of the background. > >> > >> More subtle filters set a background detection in one image and make > >> that transparent and then add only the opaque pixels up into the other > >> image. That's very complex however. This kind of stuff is what > >> Photoshop (and the GIMP) do for you, I don't think FFmpeg has such > >> filters yet. > >> > >> > > HI Ronald and thank for your answer > > > > I don't want to overlay the images but put one beside the other... > > > > Are you speaking about overlay ? > > > > Many thanks for your answer > > > > > > Gilles > > _______________________________________________ > > libav-user mailing list > > [email protected] > > https://lists.mplayerhq.hu/mailman/listinfo/libav-user > > > _______________________________________________ > libav-user mailing list > [email protected] > https://lists.mplayerhq.hu/mailman/listinfo/libav-user > _______________________________________________ libav-user mailing list [email protected] https://lists.mplayerhq.hu/mailman/listinfo/libav-user
