Ubuntu 21.10
Kdenlive 21.12.1

First time using Luts.

I load Apply Lut effect and drag to clip in timeline then browse to Luts folder containing .cube lut files from 35 Free Luts select a Lut but noting changes in the video clip.

I've had same problem as oldtimer. Also serious 'general protection faults in libavutil' applying LUTS. Applied a LUT to an image to test but saw no change; then saved and reopened and the LUT was immediately applied! I will test again but it seems to apply to both appimage and PPA I have in Ubuntu 20.04. I swing between the two at the moment as PPA has not caught up to the appimage.

Try saving with the LUT active then reopening and post your results. It might help to nail down the problem.

spottedgum wrote:I've had same problem as oldtimer. Also serious 'general protection faults in libavutil' applying LUTS. Applied a LUT to an image to test but saw no change; then saved and reopened and the LUT was immediately applied! I will test again but it seems to apply to both appimage and PPA I have in Ubuntu 20.04. I swing between the two at the moment as PPA has not caught up to the appimage.

Try saving with the LUT active then reopening and post your results. It might help to nail down the problem.

Saving the project did the trick The LUT applied prior to saving is applied and changing to different LUTS is now immediately applied.
Thanks spottedgum