Fortnite in 4: 3 stretched record without recruiting?

That my Fortnite videos are stretched directly in 4: 3 without that I have to pull the recording into the renderer so that it is stretched? I always have black bars.

Just so by the way I do not want to record with OBS or so but directly with NVIDIA Shadowplay, have already tried everything… Desktop resolution adapted to the resolution of the game, with GPU scale, full screen, hacking in '' From scaling mode set by games and programs put '' into action.

Can someone help me there?

But Shadowplay is not about OBS.

If you want to do it on Obs you can watch my YouTube video