how to fix the network speed limit between server and client

[ynlch]

I'm using 0.9.12, client connects to remote server through wifi or wlan. I use 8 camera and image size is 1280x720, the frame rate is only 4 fps, I think it is limited by network speed, the image raw data is rgba, 4bytes each pixel, so 1280x720 is about 4MB, 8x4=32 frames each second, it needs about 32x4=128MB=1024M bps, reach network card's max speed.

so how to solve such problem? my idea is to encode RGB image to PNG, or enable gzip of http, but I don't where to change it, someone can help me? or any other idea?