On Mon, May 9, 2022 at 8:00 PM Mahesh Pittala <mah...@multicorewareinc.com> wrote:
> Hello Paul B Mohal, > > BBC has released different types of LUT's, attached the paper. Do you have > any plans to add support ? > I will repeat one last time. CUBE specification have not types of lut. There is only input/output range specification for CUBE files which to my knowledge is properly supported. Also lut3d filter operates and produce rgb only colorspace output. So have you actually tried those luts with recent ffmpeg (not old one) and reported your findings? > > Thanks, > Mahesh > > On Mon, May 9, 2022 at 1:15 AM Paul B Mahol <one...@gmail.com> wrote: > > > On Sun, May 8, 2022 at 9:28 PM Mahesh Pittala < > mah...@multicorewareinc.com > > > > > wrote: > > > > > Hello, > > > > > > I am trying to convert HLG to SDR using 3D LUT cubes freely distributed > > by > > > NBCUniversal. (3-NBCU_HLG2SDR_DL_v1.1.cube > > > < > > > > > > https://github.com/digitaltvguy/NBCU-HDR-SDR-Single-Stream_Workflow_Recommendation/blob/main/LUTS_for_Hardware_Devices/3-NBCU_HLG2SDR_DL_v1.1.cube > > > > > > > ) > > > > > > > > > https://github.com/digitaltvguy/NBCU-HDR-SDR-Single-Stream_Workflow_Recommendation/tree/main/LUTS_for_Hardware_Devices > > > > > > It seems the LUT conversion appears to be a modified “Type 1” which is > > > mapping absolute signal peak to narrow range (10bit code value 940). > > This > > > value should allow code values all the way up to 1019 > > > > > > Does ffmpeg's lut3d implementation support type 3 ? > > > > > > > cube lut3d specification says nothing about type 3, whatever type and 3 > > means in this context. > > > > > > > > > > My CLI: > > > ./ffmpeg -i Input_hlg_422_10bit.mov -vcodec v210 -vf > > > "lut3d=interp=tetrahedral:file= 3-NBCU_HLG2SDR_DL_v1.1.cube > > > < > > > > > > https://github.com/digitaltvguy/NBCU-HDR-SDR-Single-Stream_Workflow_Recommendation/blob/main/LUTS_for_Hardware_Devices/3-NBCU_HLG2SDR_DL_v1.1.cube > > > > > > > " -an output_SDR_422.mov > > > > > > Thanks, > > > Mahesh > > > _______________________________________________ > > > 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 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 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 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".
