Latency of this version of wifibroadcast.

[lukolszewski]

I believe I set up everything correctly, but I'm not getting lower latency with the packetised wifibroadcast (by svpcom) as compared with the raw binary wifibroadcast (befinitiv used in openhd).

Both approximately 150ms with the openhd perhaps 10ms better (but this is likely due to the way I measured latency, details below).

So, is latency supposed to be better with the packetised version? If yes, please help me achieve it.

My setup is the following :
Tx:
Raspberry pi zero 2 w
RX:
Svpcom version :
1- raspberry pi 3 sending via wired Ethernet to a Windows laptop. There gstreamer used to display
2 - a virtual machine running Ubuntu sending to the Windows host via host only networking
Befinitiv version:
Openhd ground running on RPi 3 displaying locally.

Latency measurement method: gopro recording at 200 frames per second and switching off/on a desk lamp.

I'm using 11mb atheros firmware on both ends. Raspivid is using the same command line as openhd default (1280x720x48fps).

Please let me know best latency you managed to achieve with the svpcom version.

Also,
I failed to find a stutter free method of playing the stream on rpi directly on latest raspbian. They removed omx libraries and v4l is horribly slow.. If anyone has any tips please let me know.

Edit: I found a way to play the video directly on rpi 3 using v4l2 and gstreamer so it is more comparable to how opeworks and the result is pretty much exactly the same latency of ~150ms. If anyone managed to get down to 100ms I would be very interested in hearing how.