сб, 27 мая 2023 г., 20:20 Andrew Randrianasulu <[email protected]>:
> > > сб, 27 мая 2023 г., 20:09 Phyllis Smith <[email protected]>: > >> 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 .... > upd: it was only recently-merget cxx17 branch on github, 3.0.4 release apparently work on older os/compilers ... https://github.com/sekrit-twc/zimg/releases/tag/release-3.0.4 "checking whether C++ compiler accepts -std=c++14... yes" on gcc 11.2 may be we can dive deeper in history ... may be 2.8? https://src.fedoraproject.org/repo/pkgs/zimg/ >> On Sat, May 27, 2023 at 10:56 AM Andrew Randrianasulu via Cin < >> [email protected]> 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 >>> [email protected] >>> https://lists.cinelerra-gg.org/mailman/listinfo/cin >>> >>
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