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 <gilles75...@gmail.com> 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 > libav-user@mplayerhq.hu > https://lists.mplayerhq.hu/mailman/listinfo/libav-user > _______________________________________________ libav-user mailing list libav-user@mplayerhq.hu https://lists.mplayerhq.hu/mailman/listinfo/libav-user
