>Hi, > >On Thu, Oct 01, 2015 at 05:42:41 -0700, nicolab wrote: >> I am using histogram <https://ffmpeg.org/ffmpeg-filters.html#histogram> >> filter mode levels is error but color, color2 and waveform mode is OK. > >The mandelbrot source seems to output RGBA, but histogram does not >support RGBA (nor any RGB, AFAICT). So inserting the format filter is >the right thing, but perhaps using "format=gbrap" may be more lossless. >(I admit I don't have a lot of expertise when it comes to formats.) > >I checked the sources to see that histogram supports gbrap (and gbrp >and gbrp9 and ...). > >Moritz
Thanks for checking sources. Command goes well using format filter in front of histogram filter. ----- https://twitter.com/nico_lab http://nico-lab.net/ -- View this message in context: http://ffmpeg-users.933282.n4.nabble.com/Why-histogram-filter-mode-levels-cannot-use-h-vstack-filter-inputed-rgb-a-source-tp4672594p4672600.html Sent from the FFmpeg-users mailing list archive at Nabble.com. _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user