пт, 9 мая 2025 г., 21:50 Mark Filipak <markfilipak.i...@gmail.com>:
> I make two statements below regarding the core of the filter_complex. > I'd be grateful if you'd point out statements that are wrong. > (Of course, anything more you'd like to contribute is welcome, too.) > > In the core of filter_complex, pixel format is always gbrpf32le. > I do not think this is true ... at least in cinelerra-gg many ffmpeg filters run as 8bpc, on my fx 4300 (in 32 bit mode) difference between 8bpc and 32fp surely very noticeable. > It is possible to convert bt2020nc/bt2020/smpte2084 to bt709/bt709/bt709 > via zscale, only. > If you have Vulkan driver and libplacebo dev files installed you can try something like: ./ffmpeg -init_hw_device vulkan=vulkan -filter_hw_device vulkan -hwaccel vulkan -i ~/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov -vf libplacebo=w=1920:h=1080:force_original_aspect_ratio=decrease:normalize_sar=true:upscaler=ewa_lanczos:downscaler=ewa_lanczos:colorspace=bt709:color_primaries=bt709:color_trc=bt709:range=tv -c:a copy -c:v libx264 -f mp4 -benchmark /dev/shm/ffmpeg-git-libplacebo-vulkan-2k.mp4 or with opencl: ./ffmpeg -hwaccel vaapi -init_hw_device opencl=ocl -filter_hw_device ocl -i ~/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov -vf "scale=1920:1080,format=p010,hwupload,tonemap_opencl=tonemap=mobius:param=0.01:desat=0:r=tv:p=bt709:t=bt709:m=bt709:format=nv12,hwdownload,format=nv12" -c:a copy -c:s copy -c:v libx264 -f mp4 /dev/shm/fhd-sdr-ocl.mp4 I used ffmpeg 7.1.1 or git (compiled them and placed in ~/bin/ ) Note, I have recent vulkan-sdk ( vulkan-sdk-1.4.304.0-i686-1) and mesa3d suite of drivers also from git , on AMD RX550 GPU, Slackware 15.0 updated manually. libplacebo at libplacebo-6.338.1-i586-1_SBo ./configure lines were ffmpeg version N-118190-g8bb682d454 Copyright (c) 2000-2025 the FFmpeg developers built with gcc 11.2.0 (GCC) configuration: --enable-opencl --disable-debug --enable-libx265 --enable-libx264 --enable-gpl --enable-libplacebo --enable-vulkan --enable-libshaderc --enable-libzimg --enable-libaom --enable-libdav1d --enable-libsoxr --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gnutls --enable-libass --enable-libbluray --enable-libcdio --enable-frei0r --enable-libgsm --enable-openal --enable-libopus --enable-librtmp --enable-libsnappy --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp On Windows you probably want different hwaccel (dx11va ?), hopefully it will work with other hw filtering components ? > Thanks! -- Mark. > _______________________________________________ > 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".
