[Suggestion] add rotation jobs for clips.
well, like now is not possible to use rotations effects because the rotated clip is cutted from previous geometry/size (if i have an horizontal clip, rotating it by 90 i have just a square on center because upper and bottom sides are out of clipping area)
i suggest to add 2 rotation jobs directly on Project bin , using ffmpeg to be sure to not lose details and to make easier management of vertical clips from smartphones.
usually is use these 2 batches:
to rotate 90:
c:/programmi/kdenlive/bin/ffmpeg -i C:\Users\user\Videos/in.mp4 -vf "transpose=2" C:\Users\user\Videos/out.mp4
to rotate -90:
c:/programmi/kdenlive/bin/ffmpeg -i C:\Users\user\Videos/in.mp4 -vf "transpose=1" C:\Users\user\Videos/out.mp4
After the successfully rotation of CLIP i suggest to open the POP-UP project resolution change asking to use the format of clip resolution. (from 1920x1080 to 1080x1920)
here some posts about rotations issues on Kdenlive:
https://forum.kde.org/viewtopic.php?f=270&t=163228
https://forum.kde.org/viewtopic.php?f=270&t=151998
https://www.reddit.com/r/kdenlive/comments/9fug1p/imported_video_not_oriented_correctly_help_3/