ok, I hope you understand what I tried to describe there :
As it turns out that the live.API request answering timing could fluctuate in very large amount depending on the complexity and number of m4l devices, I really would like to have some ways to know When the the answer is complete.
AFAIK , there is only one request who sends a "done" when complete: "getinfo"
I wish I could have such a message when I ask for the devices on track or their parameters.
So it will be possible to build a reliable cascade scheme of requests.
So far I use some [delay] to "secure" things but I really don't like this.
Does this makes sense ?