Likewise, extracting color grading values would only work if the video clip in Shotcut had all other post-processing filters correctly applied first, which would be guesswork at best. The Shotcut color grading filter alone cannot replicate these filters. Here are the problems:Ī frame grab from a finished video will have processing besides color grading applied, such as contrast and saturation. It will only approximate at best, and probably won’t be good enough, especially on skin tones. What’s the source of Graded.png? If the comparison is being made to an image that was graded with some other tool like DaVinci Resolve, then the math will never work. Apply differential to Source.png and expect to be equal to Graded.png.Compare Graded.png to Source.png to calculate differential.Bring it into Shotcut, use one Color Grading filter only, export frame as Graded.png.Start with a normal PNG image (Source.png).* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * License along with this library if not, write to the Free Software * You should have received a copy of the GNU Lesser General Public * Lesser General Public License for more details. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * but WITHOUT ANY WARRANTY without even the implied warranty of * This library is distributed in the hope that it will be useful, * version 2.1 of the License, or (at your option) any later version. * License as published by the Free Software Foundation either * modify it under the terms of the GNU Lesser General Public * This library is free software you can redistribute it and/or The best resource is to look at the source code: mltframework/mlt/blob/master/src/modules/plus/filter_lift_gamma_gain.c /*
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