Cameras don't want to reconnect on Pi Reboot.

[Daltz333]

Info:
Raspberry Pi3 2 USB Camera Server using the example Script
RoboRIO is Java
Cameras are Logitech C270s

Issue:
CameraServer script starts up on bootup and runs normally, sending camera info. The issue is when the Pi rebooted via 'sudo reboot now' or by quickly turning the robot on and off, it refuses to initialize the second camera. It can be fixed by unplugging the second camera and plugging it back in. Or by turning the robot off, unplugging the battery, waiting a few seconds and turning it back on I an willing to send bug reports if told how to.

[virtuald]

Are there error messages of any kind?

[Daltz333]

I can't tell. It only does it on startup and I don't have any logging set up. When I return it manually to see console messages, everything works. I doubt it's my startup script.

[Daltz333]

Correction: When I re-run it manually

[Daltz333]

Issue is duplicated on a second Pi. Also it only does it to the second camera initialized. If camera 2 becomes camera 1, and the original cam 1 is can 2. Then the new cam 2 is the one not initial. Aka the second one initialized in the example usb script.

[virtuald]

Take a look at the output of dmesg and see if there are any error messages.

It's also possible that the video subsystem just hasn't initialized by the time cscore starts. You could try adding in a 5 second sleep (not ideal), or see if there's a way to determine if video has been fully initialized before you start using the camera.

[virtuald]

Did you ever find out more information about this? Otherwise I'm just going to close it.

[Daltz333]

I was not able to find any information on it. Because it happened so sporadically and at the competition I was always in such a rush. I'll reopen if I get any more information.