MartyG-RealSense
commented
1 year ago Hi @michaelcukier As the number of RealSense cameras that are simultaneously active on the same computer is increased, the processing burden on the computer of handling those multiple cameras will increase, necessitating a higher-specification processor. For example, the Up Squared single-board computer has a 1.8 Ghz processor and can handle two RealSense 400 Series cameras simultaneously. The AGX Orin has a 2.2 Ghz processor.
For four simultaneously active cameras on the same computer, a processor equivalent to an Intel Core i7 or better is recommendable.
It is possible that whilst your board can handle two cameras simultaneously at almost 30 FPS, three cameras is a processing tipping-point where performance begins to degrade. You could test whether performance improves if the FPS for all cameras is reduced from 30 to 15.
michaelcukier
Issue Description
I'm running three D405 using
pyrealsense2. I'm running a simple python code that turns on the three cameras and count how many frames were received, and I sometimes get 4 FPS on average for all three cameras, and some other times 29 FPS, even though the setup is exactly the same. I don't understand why.I tried running my code for a very long time (1 hour) twice, compared the results, and still got very different observed FPS. I am using the exact same three USB cables. I've also noticed that, very often, one camera has a significantly superior FPS compared to the two others.
What could be the reason(s) for this massive variance in FPS between each tests? Why is the observed FPS not stable at all? I could understand a difference of 1 or 2 FPS during each test, but a difference of 25 is really strange.
Note: when trying two or one D405, this problem seems to go away and the FPS is always at nearly 30FPS.