Just for future reference, here is how to use NVIDIA Surround and
OBS Studio (Open Broadcaster Software) for your use case.
I'm assuming a continuous display with 5760 x 1080, and you want to record the center screen of size 1920x1080 beginning at position 1920x0 and ending at 3840x1080.
BBCode has no nested lists, so here comes some good old plain text:
Code:
- get OBS Studio, install, run
- Settings > Video:
- Base Resolution: 1920x1080
- Output Resolution: whatever you like
- add a scene (you can skip this, if you already have a scene)
- add a "Game Capture" source, right click it, select "Filters"
- add a "Crop" filter, tick "Relative" and set the left and right borders to crop:
- Left: 1920
- Right: 1920