DaVinci Resolve can't deliver 1920x1080 videos I'm new to DaVinci Resolve, and new to video editing too.
I used the newest version of DaVinci Resolve 16. I used OBS Studio to record some game/desktop footage at 1920x1080 and 30 fps. I then imported said footage into DaVinci with no issues and edited it. Everything was normal. However, after rendering, the result looks wrong (see the image below)


The output video canvas seems to be 1920x1080, but the actually image is squeezed.

My project settings for the timeline are:
- 1920x1080.
- Pixel ratio is square -- I have a few options (square, 16:9, 4:3 and cinema), but when I choose 1920x1080, the 16:9 and 4:3 checkboxes stay dark and I can't select them.

I tried also to change the "Clip attributes", which include PAL 16:9 and NTSC 16:9. None of it worked.
I used the "Youtube 1080P" rendering option preset.
I don't think it's a limitation of the free version.  Check all the project and system settings in Davinci. There are a lot of them - maybe one of them is set to something other than 1920x1080