You need to set the aspect ratio manually, it's not 3:4. Nearest I can make it to is 47 : 62 or rounded down 4:6 but not sure either will work. This is the one of many problems with using phones to produce videos, as phones become more individual in their specifications normal use ratios are thrown out of the window. It would be easier if you can to select a normally recongnised ratio to use in your phone when recording. Also remember anyone watching the outputed file online on a phone with a diffrent ratio screen won't see it as you do anyway.
thanks.. I am not too bothered if I need to crop it to the pixel.. the aspect ratio is what I want not the micro management of it... but these videos are made from screen casts from a mobile device that I then use to make tutorials.. and they do not need the private stuff on my phone around the app.. they need to be this rough ratio because I want to effectively just "crop" and "export" it's too messy otherwise my job is to pass on the screen casts of me fixing / doing things and users don't need to see my top bar / screen cast edit controls (bottom) and other things..
the way I do it at the moment is do the whole thing let magix mess it up and once exported I open shotcut and file->new [Vertical Mode] "Vertical HD 30fps" project. Then import into that what magix made, just to crop/reexport it again - it's twice the fiddling
Even on your screen grab image you have the format laid out to a 9:16 ratio. That is landscape to start with. You need it to be 19:9 to use a portrait setting. It goes width and then height.
On the export screen that was your first screenshot, have you tried clicking on the three buttons (ellipse) by where it says Ratio: 16:9. The screen that then opens allows you to set your own choice of export ratio.
On your second screenshot, at the bottom of the screen, have you tried highlighting and typing in your chosen Width, height and Ratio, and fps if needed?
When does it "say" that? I presume you are referring to a prompt that tells you that the movie (project) settings do not match the export settings.....so you are then changing the movie settings to see effectively what the export might look like when you preview the timeline, but what you should also be doing is changing the export's aspect ratio in your first screen shot, from 16:9 to 9:16, as well.