Camera out of focus

[wsh32]

Camera autofocus isn't reliable, it consistently blurs the entire image. While this is mostly okay, it harms performance when the puck is in motion.

The table is far away enough that we can set it to the infinite focus setting (0) as seen here: https://stackoverflow.com/questions/16319759/disable-webcams-autofocus-in-linux

[wsh32]

Setting it using v4l2-ctl works, though we should use the cv2.CAP_PROP settings

[wsh32]

v4l2-ctl --set-ctrl=focus_auto=0
v4l2-ctl --set-ctrl=focus_absolute=0