> > > 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
