Camera stops producing depth images and features after 4h.

jkchen46033

erik Shared.

WouterOddBot

Ah danged, sorry forgot about the things unspecified in the example. Yes I'll make it fully reproducible.

We actually use the USB-C with screws. The camera doesn't seem to crash when it's completely still.

erik

@WouterOddBot that seems.. strange. Why would My bet would be that it's either bad connection (perhaps between USB-A and computer?), or perhaps voltage drops - ripple on source, maybe because a bunch of current goes through the motor, and it's being powered from the same battery?

WouterOddBot

erik

Ok I send you the MRE. We have the exact same MRE running on our robot on the field for quite some hours now, but the camera is still producing depth images and features.

WouterOddBot

erik

Please note that the camera stops producing only depth images and features. It keeps producing color images and detections. And we suspect that the camera needs to be in motion.

WouterOddBot

Hi @erik,

We haven't been able to reproduce the issues with the MRE so far. But we found that we normally set the yolo detection confidence very low (0.1) so that we can filter detections dynamically. We're now running an experiment with super low detection confidence (0.01) to see if that makes a difference. I also sent you the updated script by mail.

erik

Interesting, please let us know if that makes a difference.

WouterOddBot

Ok we ran an experiment with confidence level 0.01. The camera gave between 80 and 160 detections per frame. The depth and features stopped after 12h. Can you confirm that with an experiment too?

We also ran an experiment where we omitted the downsampling node for the hi res images. With the ethernet camera we had to limit the amount of hi res images. But with usb3 we can just transfer all of them. We're not entirely sure yet, but it looks like omitting this downsampling node helps too.

(We still keep the downsampling node from 10Hz to 5Hz because 10Hz is too fast for the network.)

jakaskerl

WouterOddBot
Can you give me some more info on:

the host you are using
depthai version
bandwidth measurements (luxonis/depthai-experimentsblob/master/random-scripts/oak_bandwidth_test.py)

I have tested your MRE on x86 Ubuntu 22.04, and it ran without problems for 40+ hours.

Thanks,
Jaka

erik

@jkchen46033 we weren't able to repro your MRE, it has been working as expected. After how long did it crash?

WouterOddBot

jakaskerl

Hi Jaka,

We'll come back to this soon, but for now the issue underneath is more critical to us:
https://discuss.luxonis.com/d/5923-imu-sometimes-10-degrees-off-after-180-degree-turn/11

(We already built something that automatically restarts the camera when it stops working.)

jakaskerl

WouterOddBot
Understood. We can continue this on the other thread, then return when it's solved.

Thanks,
Jaka

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