Hello,
Can do Kdenlive to automatically cut out all the scenes? Insert clip into project bin, right click on clip -> "Clip jobs -> Automatic scene split -> Cut scenes"
Scenes are detected, cut and filed under the clip in the project bin. Video in AV track has 50,100,200... scenes, but they are all marked in red in one clip. I have to cut them all with the Shift+R key manually. But this is very time consuming. Can it be set automatically?

Can you select all subclips and drag/drop it into the timeline? I don't know if this is working.

The problem was that I could only drag the entire video with the scenes marked. No clipped scenes appeared in the project stack after clicking the menu next to the file name. In the Scene cut menu, I set the cut scenes option.
But everything is solved, re-installing kdenlive helped.
Thank you for your response.