1.25. Some cameras don’t start streaming image when I connect multiple (for instance, 8) cameras. This happens occasionally

It can be relaxed by activating the cameras sequentially. Please try with GStreamer command like below (this is the case of x8 C1 camera connection).

#! /bin/bash

for i in {0..7}
do
	gst-launch-1.0\
		v4l2src io-mode=0 device=/dev/video${i} do-timestamp=true ! 'video/x-raw, width=1920, height=1280, framerate=30/1, format=UYVY' ! videoscale ! xvimagesink sync=false &
sleep 2
done