I am using histogram <https://ffmpeg.org/ffmpeg-filters.html#histogram> filter mode levels is error but color, color2 and waveform mode is OK.
ffmpeg-20150928-git-1d0487f-win64-static\bin>ffplay -f lavfi -i mandelbrot -vf split[1][2];\ [1]histogram=mode=levels[1a];[2]histogram=mode=levels[2a];[1a][2a]hstack ffplay version N-75573-g1d0487f Copyright (c) 2003-2015 the FFmpeg developers built with gcc 4.9.3 (GCC) configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib libavutil 55. 2.100 / 55. 2.100 libavcodec 57. 3.100 / 57. 3.100 libavformat 57. 2.100 / 57. 2.100 libavdevice 57. 0.100 / 57. 0.100 libavfilter 6. 9.100 / 6. 9.100 libswscale 4. 0.100 / 4. 0.100 libswresample 2. 0.100 / 2. 0.100 libpostproc 54. 0.100 / 54. 0.100 Input #0, lavfi, from 'mandelbrot':0KB vq= 0KB sq= 0B f=0/0 Duration: N/A, start: 0.000000, bitrate: N/A Stream #0:0: Video: rawvideo (RGBA / 0x41424752), rgba, 640x480 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc [AVFilterGraph @ 00000083ab043620] The following filters could not choose their formats: Parsed_histogram_1, Parsed_histogram_2 Consider inserting the (a)format filter near their input or output These commands are OK. ffplay -f lavfi -i color -vf split[1][2];[1]histogram=mode=levels[1a];[2]histogram=mode=levels[2a];[1a][2a]hstack ffplay -f lavfi -i mandelbrot -vf format=yuv444p,split[1][2];[1]histogram=mode=levels[1a];[2]histogram=mode=levels[2a];[1a][2a]hstack Thanks in advance. ----- 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-tp4672594.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