Created attachment 111666 [details] this is a compressed file containing the 2 screenshots (in editing / after render) while editing everything is ok, but after rendering not all the tracks are rendered ! In the provided screenshots these are the same frame in editing and after rendering in editing there is a video behind the text but after rendering there is only text!. Thanks
You use a portrait video format. - You have to change the project settings as customer to 368x640. - You have to change the aspect ratio from 16/9 to 9/16 in the project setting. - You have to change the FFMPEG render settings as well. More details see here: https://forum.kde.org/viewtopic.php?f=265&t=153962
Portrait rendering is definitely possible in the current version. Feel free to reopen this bug or create a new report if this is still happening with the latest version (https://kdenlive.org/en/download/)