fre. 25. jun. 2021 kl. 10:14 skrev Steinar Apalnes <[email protected]>:
> Hi, > > I'm having difficulty controlling dithering when video bit depth goes > down. The following command illustrates the problem: > > ffplay.exe -f lavfi -i mandelbrot -sws_dither none -vf > scale=sws_dither=none,format=rgb8 > > I'm just using ffplay to visually show the undesired effect. Normal > operation would be with ffmpeg but the outcome is the same in both cases. > The image goes down from 8 bit to 3 bit per component and is dithered, even > though I'm trying to turn it off dithering. So I'm interested in > controlling dithering in the sws-scaler in general but cannot find the > means to do it. Either it's not working properly or I'm doing something > wrong. > > -steinar > Sorry, forgot: ffplay version N-102783-gc010994fa7 Copyright (c) 2003-2021 the FFmpeg developers built with gcc 10.3.0 (Rev2, Built by MSYS2 project) configuration: --disable-static --enable-shared --pkg-config=pkgconf --cc='ccache gcc' --cxx='ccache g++' --disable-autodetect --enable-amf --enable-bzlib --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-iconv --enable-lzma --enable-nvenc --enable-zlib --enable-sdl2 --enable-ffnvcodec --enable-nvdec --enable-cuda-llvm --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libx264 --enable-libx265 --enable-libdav1d --enable-libaom --disable-debug --enable-fontconfig --enable-libass --enable-libbluray --enable-libfreetype --enable-libmfx --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libwebp --enable-libxml2 --enable-libzimg --enable-libshine --enable-gpl --enable-avisynth --enable-libxvid --enable-libopenmpt --enable-version3 --enable-libsrt --enable-libgsm --enable-libvmaf --enable-libsvtav1 --enable-mbedtls --extra-cflags=-DLIBTWOLAME_STATIC --extra-libs=-lstdc++ --extra-cflags=-DLIBXML_STATIC --extra-libs=-liconv --disable-w32threads --shlibdir=/local64/bin-video libavutil 57. 0.100 / 57. 0.100 libavcodec 59. 1.102 / 59. 1.102 libavformat 59. 3.101 / 59. 3.101 libavdevice 59. 0.100 / 59. 0.100 libavfilter 8. 0.102 / 8. 0.102 libswscale 6. 0.100 / 6. 0.100 libswresample 4. 0.100 / 4. 0.100 libpostproc 56. 0.100 / 56. 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 (RGB[0] / 0x424752), rgb0, 640x480 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn 1.24 M-V: 0.008 fd= 0 aq= 0KB vq=15600KB sq= 0B f=0/0 -steinar _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
