[FFmpeg-trac] #11175(undetermined:new): LUT from DaVinci does nothing

FFmpeg trac at avcodec.org
Thu Sep 5 15:38:24 EEST 2024


#11175: LUT from DaVinci does nothing
-------------------------------------+-------------------------------------
             Reporter:  Jussi        |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  lut3d        |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary:
 An LUT (HueVsHue and SatVsHue corrections) exported from DaVinci Resolve
 does not seem work in Ffmpeg.

 The LUT does work in Shotcut, expect when there is any overlay (PIP or
 watermark etc). I tested the LUT in OBS and it didn't work at all.

 Notice, that the LUT's effect is not dramatic. However the effect is
 clearly visible in vectorscope. Links to expected and actual outputs are
 linked below.


 How to reproduce:

 [https://drive.google.com/file/d/1qyChqp7qnOrSXgkq52FHQSC3YP3pMdKH/view?usp=sharing
 Here's] a link to the problematic LUT.

 Video files:
 [https://drive.google.com/file/d/1qrfybSUgXk-
 UA8-kdPA_VMJy8Pw8DcbN/view?usp=sharing Input],
 [https://drive.google.com/file/d/1r-jrjty-
 DS5WGTogrkFwVo4YECrYhYy3/view?usp=sharing expected output] and
 [https://drive.google.com/file/d/1r-
 kbjxnOwNDHEdhI8qj5sFhZdvhaFSFH/view?usp=sharing actual output].

 Used commands
 {{{
 ffmpeg -i input.mp4 -vf lut3d=file=problematic.cube output.mp4

 ffmpeg -i input.mp4 -filter_complex "[0]lut3d=file=problematic.cube"
 output.mp4
 }}}
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11175>
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