Re: [Cin] FranceBB's LUT collection
пт, 16 июл. 2021 г., 09:36 Andrea paz via Cin : > I made a forum post to keep track of the repository. So if a request > is made we can direct to that post. > > > https://www.cinelerra-gg.org/forum/help-video/francebb-luts-for-space-color-conversions/ It was updated yesterday with interesting message: https://forum.doom9.org/showpost.php?p=2018552&postcount=310 quotation start === This feature was requested by ossnorry. As a bit of history, in 1953 the NTSC version of BT601 was born, however the tube phosphors originally used by the TVs of the time had issues displaying those values and the standard was later changed (reduced) in 1987 to make life easier for the hardware of the time, however one country never stopped using the original NTSC version and that country is Japan, which is why the original NTSC version has become known as "NTSC-J" which stands for "Japan". Anyway, the old BT601 NTSC Japan (1953) is based on the following values: x white = 0.3100 y white = 0.3160 x red = 0.670 y red = 0.330 x green = 0.210 y green = 0.710 x blue = 0.140 y blue = 0.080 and is indicated with --colormatrix smpte170m --transfer bt470m --colorprim bt470m while the normal BT601 NTSC SMPTE C (1987) that all other NTSC countries adopted has the following values: x white = 0.3127 y white = 0.3290 x red = 0.630 y red = 0.340 x green = 0.310 y green = 0.595 x blue = 0.155 y blue = 0.070 and is indicated with: --colormatrix smpte170m --transfer smpte170m --colorprim smpte170m As you can see, all values are different, including the white point. === end of quotation I surely recall Japan was different, but it completely evaded my mind that old NTSC 1953 was still in use there up to relatively modern times! cc ffmpeg-users because it tend to be more popular list, so visibility will be higher. > -- > Cin mailing list > [email protected] > https://lists.cinelerra-gg.org/mailman/listinfo/cin > -- Cin mailing list [email protected] https://lists.cinelerra-gg.org/mailman/listinfo/cin
Re: [Cin] FranceBB's LUT collection
I made a forum post to keep track of the repository. So if a request is made we can direct to that post. https://www.cinelerra-gg.org/forum/help-video/francebb-luts-for-space-color-conversions/ -- Cin mailing list [email protected] https://lists.cinelerra-gg.org/mailman/listinfo/cin
Re: [Cin] FranceBB's LUT collection
I don't know about making this repository of LUTs known. There are many websites that offer LUTs for free (often of very bad quality!) and everyone can look for themselves what they need. It is true, however, that these are useful for color space conversions, so it might be fine to point to git. Andrew, what do you think? -- Cin mailing list [email protected] https://lists.cinelerra-gg.org/mailman/listinfo/cin
Re: [Cin] FranceBB's LUT collection
P.S. I downloaded 2 of them and tested with CinGG -- they worked and made a difference but I have no idea if it is correct. On Tue, Jul 13, 2021 at 5:25 AM Andrea paz via Cin < [email protected]> wrote: > Thanks, downloaded and added to my collection (which I then never > use...). There is also a program to create hald-CLut and then turn > them into .cube. > -- > Cin mailing list > [email protected] > https://lists.cinelerra-gg.org/mailman/listinfo/cin > -- Cin mailing list [email protected] https://lists.cinelerra-gg.org/mailman/listinfo/cin
Re: [Cin] FranceBB's LUT collection
Andrea, should we add this reference to Plugins.tex under the F_lut3d or is there another reference? https://github.com/FranceBB/LinearTransformation On Mon, Jul 12, 2021 at 4:48 PM Andrew Randrianasulu via Cin < [email protected]> wrote: > forum > https://forum.doom9.org/showthread.php?t=176091 > > it says those LUTs should be usable for ffmpeg's lut3d and therefore for > CinGG? > > > github (each *.cube can be several mb's big) > > https://github.com/FranceBB/LinearTransformation > > author says they were verified on professional equipment... > > list includes PAL and NTSC variants for rec. 601 > > -- > Cin mailing list > [email protected] > https://lists.cinelerra-gg.org/mailman/listinfo/cin > -- Cin mailing list [email protected] https://lists.cinelerra-gg.org/mailman/listinfo/cin
Re: [Cin] FranceBB's LUT collection
Thanks, downloaded and added to my collection (which I then never use...). There is also a program to create hald-CLut and then turn them into .cube. LUT-Convert-master.tar.gz Description: application/gzip -- Cin mailing list [email protected] https://lists.cinelerra-gg.org/mailman/listinfo/cin
