How to minimize video broadcast delay time on raspberry pi + camera?

Question

Video broadcast

I'm trying to get an online broadcast from a raspberry. Scheme - raspberry pi, native video camera connected via CSI, ffmpeg nginx with rmtp module. Everything works, but the huge video delay is depressing (about 3-5 seconds).
Tell me - in which direction to look, in order to minimize the delay to 0.1-0.5 seconds. Perhaps I've chosen the wrong direction and should I drop rmtp ?
Perhaps someone has experience in building such a system - I'll be happy to hear suggestions / advice.

Answer 1

Delays can be caused by the following reasons:
- transcoding before sending via RTMP
- RTMP caching on the server side
- data network delays (WiFi?)
- RTMP caching on the client side (in the Flash player container)
Try to sequentially analyze what is happening on each stage.

Answer 2

look here and here , I think it will help