Problem to change to 16:9

Hi, I’ve recorded some old videogames with NVIDIA GeForce Experience and the final recording is at 4:3, so I use Shotcut to convert it to 16:9. The problem is that when exporting the video nothing is shown, it’s black, I can only hear the sound of the game.

What export preset did you choose?

Does the video work if you open the exported video in Shotcut?

I fixed it by changing the hardware encoder. Now works.