сб, 27 мая 2023 г., 20:09 Phyllis Smith <phylsmith2...@gmail.com>:
> Certainly merits looking at to see how useful it might be to add. > https://github.com/sekrit-twc/zimg ah, c++17! so only new OSes with new compilers will get it .... > > On Sat, May 27, 2023 at 10:56 AM Andrew Randrianasulu via Cin < > cin@lists.cinelerra-gg.org> wrote: > >> Note there was additional discussion about using zimg/zscale filter in >> ffmpeg for getting p3-d65 >> >> https://www.reddit.com/r/ffmpeg/comments/ty9c5k/color_metadata_dcip3/ >> >> >> ==== >> >> Zscale does have support for DCI white point P3 and D65 P3. >> >> ffmpeg -i INPUT.mp4 -c:v libx265 -crf 20 -vf >> zscale=r=limited:m=2020_ncl:t=2020_10:p=smpte431:c=topleft,format=yuv420p10 >> -color_primaries smpte431 -colorspace bt2020nc -color_trc bt2020_10bit >> -color_range tv OUTPUT.mp4 >> >> >> === >> >> >> I wonder if such file plays in say mpv as HDR on your display? >> >> old ffmpeg patches (2016): >> http://ffmpeg.org/pipermail/ffmpeg-devel/2016-October/201962.html >> >> "vf_colorspace: Add support for smpte 431/432 (dci/display p3) primaries" >> but previous 2 patches might be not so trivial ... >> >> >> >> https://discuss.pixls.us/t/experimenting-with-hlg-and-hdr10-for-still-images/23361?page=2 >> >> ==== >> >> ffmpeg -loop 1 -r 24 -t 30 -i DSC02236.tif -vf >> pad=3840:2160:302:0:black,zscale=tin=linear:t=arib-std-b67:npl=800:m=bt2020nc,format=yuv420p10le >> -c:v libx265 -preset medium -crf 26 -x265-params >> "colorprim=bt2020:atc-sei=18:colormatrix=bt2020nc" naturalbridge.mp4 >> >> ==== >> >> zimg2 should be in Debian since late 2021 >> >> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=966059 >> >> ffmpeg (7:4.3.2-2) experimental; urgency=medium >> . >> * debian/: >> - Build with zimg (Closes: #966059 >> <https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=966059>) >> >> >> I wonder if cingg should add zimg too? >> >> -- >> Cin mailing list >> Cin@lists.cinelerra-gg.org >> https://lists.cinelerra-gg.org/mailman/listinfo/cin >> >
-- Cin mailing list Cin@lists.cinelerra-gg.org https://lists.cinelerra-gg.org/mailman/listinfo/cin
