[BUG] {python3 install_requirements.py failing} about depthai

[brmarkus]

When you see this failing - do you still have an Internet connection, can access other online resources?
Seems a network connection could not be established anylonger.

Could it be a power-supply issue (while installing the SoC is heating up, a lot of processing power required), or simply a loose connection?

[dmorris0]

Interesting. I turned it off and let it cool down. Then restarted and then it installed fine. Not sure if it is a loose connection or over power issue. I have a feeling whatever the problem is that it will resurface.

[dmorris0]

There seems to be some connection problem, although now with the USB. When I run the first demo, it initially works (I see the depth and color images), and then after a couple seconds it fails:

python3 depthai_demo.py -gt cv
Using depthai module from:  /home/ubuntu/.local/lib/python3.10/site-packages/depthai.cpython-310-aarch64-linux-gnu.so
Depthai version installed:  2.21.2.0
Setting up demo...
Available devices:
[0] 19443010817AF71200 [X_LINK_UNBOOTED]
USB Connection speed: UsbSpeed.SUPER
Stopping demo...
=== TOTAL FPS ===
[color]: 6.4
[disparity]: 6.4
[disparityColor]: 6.4
[nn]: 0.0
Traceback (most recent call last):
  File "/home/ubuntu/depthai/depthai_demo.py", line 1053, in <module>
    runOpenCv()
  File "/home/ubuntu/depthai/depthai_demo.py", line 1043, in runOpenCv
    demo.run_all(confManager)
  File "/home/ubuntu/depthai/depthai_demo.py", line 133, in run_all
    self.run()
  File "/home/ubuntu/depthai/depthai_demo.py", line 317, in run
    self.loop()
  File "/home/ubuntu/depthai/depthai_demo.py", line 373, in loop
    self._pv.prepareFrames(callback=self.onNewFrame)
  File "/home/ubuntu/.local/lib/python3.10/site-packages/depthai_sdk/managers/preview_manager.py", line 148, in prepareFrames
    packet = queue.tryGet()
RuntimeError: Communication exception - possible device error/misconfiguration. Original message 'Couldn't read data from stream: 'color' (X_LINK_ERROR)'

[brmarkus]

Is your HW operating under rough conditions like heat, vibrations?
Do you run your "RPi 4" with a battery, would you have a chance to use another power-supply?
Could it be maybe a broken "RPi 4"?

Can you run any other heavy job on the system like compressing&decompressing (ZIP?, tar& ), or video-transcoding (VLC? gstreamer?) to see if your HW is "stable under heavy load"?

[dmorris0]

It is using a battery, but no harsh conditions. I might be able to try a different power supply. I could also try some heavy jobs, although not sure how to measure stability.

[brmarkus]

There could be peaks in energy consumption which the battery temporarily could not provide. A bigger power-supply (or additional battery/batteries in parallel to the first) might help...

Compress a big file (e.g. video-file) and create a SHA checksum - and compare with the checksum of the same file, but calculated on a different machine.

Transcode a video-file - a visual inspection might not reveal optical artifacts - but maybe the transcoding will generate error-/warning-messages.

Sorry if all this leads to nothing... energy consumption (or heat?, or loose connection?) is just a guess...