On 1/29/23, Michael Koch <astroelectro...@t-online.de> wrote: > Am 29.01.2023 um 19:32 schrieb Paul B Mahol: >> On 1/29/23, Michael Koch <astroelectro...@t-online.de> wrote: >>> Hello, >>> >>> if I understood the documentation correctly, the normalize filter maps >>> the darkest input pixel to blackpt and the brightest input pixel to >>> whitept: >>> darkest pixel --> blackpt >>> brightest pixel --> whitept >>> >>> However I need a slightly different mapping: >>> A black input pixel shall remain black, and the brightest input pixel >>> shall become white. >>> black --> blackpt >>> brightest pixel --> whitept >>> >>> With other words: Just multiply all pixels by a suitable constant. Don't >>> add or subtract anything. >>> Is this possible? >>> >>> Known workaround: Make sure that the input frame contains a black pixel, >>> by inserting one in a corner. >> Try attached patch. > > How must I set the options for the desired behaviour?
Set first strength to reverse of second strength. So 1.0 and 0.0 or 0.0 and 1.0 > > Micheal > > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". > _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".