SimpleHandViewer-SFML can't change resolution

I just recieved my Astra Embeded S. In the SimpleDepthViewer-SFML, I knew how to change the resolution and fps. Just switch to a resolution of 640*400 , and I can get great results. I’m happy with the resolution of this device.

While I want to use SimpleHandViewer-SFML, I cant find how to change resolution or fps. I knew this is because the defalt is 640*480. Can you help me? Thank you!

Hi, did you manage to work this out as I would like to know how to do this