How to transfer video from QCamera over the network in Qt?

Question

Qt

Hello!
There is a webcam, I get the video stream through QCamera, I display it in QCameraViewfinder.
You need to force it to transmit a video stream over the network and also output it to QCameraViewfinder on another PC.
There are several problems
1. How exactly to transfer (protocol?) to convert to rtsp (h264) on the fly is a rather resource-intensive task or not ... If not, then with what (as I understand the library ffmpeg)?
2. How to display better (through what)? Trying to drive into the same QCameraViewfinder or is it easier to draw frame by frame?