cristhian
7628a8515b
validate / validate (push) Successful in 59m14s
CAPTURE_PATH defaulted to index 0, which is a coin flip on a machine with one camera. A UVC camera exposes a second device node for its metadata stream -- /dev/video1 beside /dev/video0 -- and that node opens happily and never yields an image, so the lowest device number is wrong about as often as it is right. With neither CAMERA_ID nor CAPTURE_PATH set, the node now opens each /dev/video* in numeric order and keeps the first that actually delivers a frame. Reading one is the test, because opening is not evidence. Discovery finding nothing falls back to index 0 rather than raising, which keeps the failure in one place: the first read, where CI publishes a placeholder and a normal run raises with a message naming the device. CAMERA_ID is still worth preferring on a robot. Neither an index nor discovery order is stable across reboots or across which port a camera is in; a by-id name is.