Also it is good to explicitly control quantization range in ffmpeg (separately for input and output) frequently prefer to manually rector limited quantization range.
Ffmpeg extract frames png software#
(Although there shouldn't be a difference between PNG and BMP output for ffmpeg there is one known difference - it writes a PNG gAMA tag, which causes some software to display PNG differently - but this is in terms of colors (R,G,B values), not chroma upsampling which your screenshots show)Ĭode: scale=iw:ih:sws_flags=spline+accurate_rnd+full_chroma_int+full_chroma_inp:out_color_matrix=bt709 i've struggle with similar issues on ffmpeg from long time - and i have mixed results - ffmpeg has nasty habit to call automatically libswscale in background without telling anything - check report thoroughly. Some are sharper but cause aliasing, some are softer, some cause ringing etc. The biggest difference will be in the chroma center interpretation, and which scaling algorithm you choose).
There are dozens of different ways you can do this, even within avisynth or ffmpeg. How they get scaled to 1280x720 in RGB determines what you see If you have 1280x720 4:2:0, this means the U,V planes which contain the color information are only 640x360 in dimensions. How ffmpeg or avisynth is converting YUV 420 to RGB is different than the method you used for taking the "original" screenshot. There is a difference in chroma upsampling method. It's not really the "original" you're looking at a RGB converted representation of the original. How are you taking the "original" screenshot ? What software or algorithm ? Video:29757kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
PS D:\ffmpeg\bin> ffmpeg -i "in2.mp4" -r "1.00" -vf scale=out_color_matrix=bt709 "frames\f_%05d.png"įfmpeg version N-91399-g9f0077cc03 Copyright (c) 2000-2018 the FFmpeg developersĬonfiguration: -enable-gpl -enable-version3 -enable-sdl2 -enable-bzlib -enable-fontconfig -enable-gnutls -enable-iconv -enable-libass -enable-libbluray -enable-libfreetype -enable-libmp3lame -enable-libopencore-amrnb -enable-libopencore-amrwb -enable-libopenjpeg -enable-libopus -enable-libshine -enable-libsnappy -enable-libsoxr -enable-libtheora -enable-libtwolame -enable-libvpx -enable-libwavpack -enable-libwebp -enable-libx264 -enable-libx265 -enable-libxml2 -enable-libzimg -enable-lzma -enable-zlib -enable-gmp -enable-libvidstab -enable-libvorbis -enable-libvo-amrwbenc -enable-libmysofa -enable-libspeex -enable-libxvid -enable-libaom -enable-libmfx -enable-amf -enable-ffnvcodec -enable-cuvid -enable-d3d11va -enable-nvenc -enable-nvdec -enable-dxva2 -enable-avisynth
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