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christianrauch / camera_ros

ROS 2 node for libcamera supported cameras (V4L2, Raspberry Pi Camera Modules)
https://libcamera.org
MIT License
69 stars 30 forks source link

No cameras available on Ubuntu 22.04 with ROS humble #18

Closed ubsyj closed 9 months ago

ubsyj commented 1 year ago

Hi, I would like to use your camera_ros package for my ROS humble project on Raspberry Pi 4B with Ubuntu 22.04 (Jammy Jellyfish) and Camera Module 3. I was able to build my ros workspace but when I tried to run ros2 run camera_ros camera_node libcamera cannot find any cameras available. Did I miss something in my setup?

christianrauch commented 1 year ago

Do the libcamera example executables (without ROS) work? Do you see the same issue with the binary packages from the repo?

rpapallas commented 1 year ago

I have the same issue with binary packages. The following Python script can access the camera and save an image to a file:

import cv2
cap = cv2.VideoCapture('/dev/video0', cv2.CAP_V4L)
cap.set(cv2.CAP_PROP_FRAME_WIDTH, 2560)
cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 1440)
ret, frame = cap.read()
cv2.imwrite('image.jpg', frame)
cap.release()

Therefore, I don't think is permission issues.

christianrauch commented 1 year ago

Therefore, I don't think is permission issues.

This doesn't have to be a permission issue. The node relies on libcamera to access cameras. It does not use V4L2 directly. If libcamera does not see the camera, then the node will not be able to see it too. Can you use the camera with the libcamera examples in the upstream repo (see https://libcamera.org/getting-started.html)?

christianrauch commented 9 months ago

I am going to close this as there is no new information on this issue. Please check with the libcamera examples first to verify that the library can detect the camera. You can reopen this issue if the connection problem persists and is indeed not reproducible with the libcamera examples.