On 2/22/19, Clement Poulain <c...@dupevfx.com> wrote:> Hey guys,>> I am working with an exr image sequence (colorspace: linear)> I have a lut file to go from AlexaV3LogC to rec709.Could use lut1d filter, ihf you have .cube 1D LUT file.> Obviously to do the encoding i need to change the colorspace first.> I can't use apply_trc flag as AlexaV3LogC is different from ffmpeg logC> colorspace.>> To counter that in Nuke i used a Expression node with this value in every> channels (channel r example):> *r>0.0106232?(log10((r + 0.00937677) / 0.18)*0.2471896) +> 0.385537:(((r+0.00937677) / 0.18) + 0.04378604) * 0.9661776*>> Which is the same than using a OCIOColorSpace node with in=linear and> out=AlexaV3LogC>You should not use ffmpeg for this. Use oiiotool which is part of the openimageio project. My viewer ships with a precompiled version of it and also supports OCIO. You can find my viewer at:http://www.sourceforge.net/projects/mrviewer _______________________________________________> 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 listffmpeg-user@ffmpeg.orghttps://ffmpeg.org/mailman/listinfo/ffmpeg-userTo unsubscribe, visit link above, or emailffmpeg-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".
