I noticed that the display aspect ratio in the Kdenlive project profile is set to 5:4 with the dimensions being 1920x1080. This should be 16:9, but not sure whether this will change the VLC behavior. Perhaps VLC is looking for other data as well that is not provided by Kdenlive …
Also, I’m pretty sure that vertical video source isn’t 1920x1080 …
If you’ve created your own profile, with made up numbers that have no relation to your actual source video, then who knows what the HAL 9000 might do with that once you’re in orbit around Jupiter.
I’d suggest that vlc isn’t ‘underfilling’ your screen at all - it’s perfectly fitting it to the 1920 wide video that your frankenstein profile created when you ask it to do that.
If I knew how to read minds, I’d have joined the circus.
You didn’t ask what to do - you said you created two 1920x1080 videos with two different applications and vlc behaved “inconsistently” when you tried to play them…
It didn’t. It displayed exactly what each of those applications created when you lied to them about the resolution of your source material.
If you don’t know what these words mean and why that’s a problem for you, you’re going to need to go and do some homework about the very basics of video before just clicking things at random and then hoping we can magically guess and explain everything that you don’t know about why that didn’t work. Sorry.
Thanks, @Ron , for pointing out the mixed up resolution/dimension settings. I missed that for my first reply.
@xmatic, a vertical video has a dimension of 1080x1920 pixels (or whatever size you want but the first number is always smaller than the second as it is given by width x height). There are project profiles for vertical videos available in Kdenlive, and IIRC also in the KDE Store.
Whoops, thanks for catching that, fixed. It should have been 9:16. (Very important to catch these errors, and fix them, because it’s like documentation for future actions.)