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ros-drivers / usb_cam

A ROS Driver for V4L2 USB Cameras
https://ros-drivers.github.io/usb_cam/main/
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Segmentation fault (core dumped) #108

Closed arsessoft closed 2 years ago

arsessoft commented 5 years ago

nikan@nikan-Inspiron-N5110:~/Desktop$ rosparam set usb_cam/image_width 1920 nikan@nikan-Inspiron-N5110:~/Desktop$ rosparam set usb_cam/image_height 1080 nikan@nikan-Inspiron-N5110:~/Desktop$ rosparam set usb_cam/framerate 30 nikan@nikan-Inspiron-N5110:~/Desktop$ rosparam set usb_cam/pixel_format yuyv nikan@nikan-Inspiron-N5110:~/Desktop$ rosrun usb_cam usb_cam_node [ INFO] [1544234089.395576612]: using default calibration URL [ INFO] [1544234089.395658790]: camera calibration URL: file:///home/nikan/.ros/camera_info/head_camera.yaml [ INFO] [1544234089.396566843]: Starting 'head_camera' (/dev/video0) at 1920x1080 via mmap (yuyv) at 30 FPS [ WARN] [1544234089.544784752]: unknown control 'white_balance_temperature_auto'

[ WARN] [1544234089.552276396]: unknown control 'focus_auto'

Segmentation fault (core dumped)

Hi, my good friends. I was justified with the err. Please guide me to solve the problem

thx ...

trixr4kdz commented 5 years ago

@arsessoft Let me see if I can help you out.

Can you type v4l2-ctl -d /dev/video0 --list-formats-ext on your terminal and comment here what the output is?

For example, my webcam only supports these resolutions with the corresponding pixel formats and frame rates:

$ v4l2-ctl -d /dev/video0 --list-formats-ext
ioctl: VIDIOC_ENUM_FMT
    Index       : 0
    Type        : Video Capture
    Pixel Format: 'YUYV'
    Name        : YUYV 4:2:2
        Size: Discrete 640x480
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 176x144
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 320x240
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 352x288
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 640x400
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 1280x720
            Interval: Discrete 0.133s (7.500 fps)

    Index       : 1
    Type        : Video Capture
    Pixel Format: 'MJPG' (compressed)
    Name        : Motion-JPEG
        Size: Discrete 640x480
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 176x144
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 320x240
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 352x288
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 640x400
            Interval: Discrete 0.033s (30.000 fps)
        Size: Discrete 1280x720
            Interval: Discrete 0.033s (30.000 fps)

I think the reason you're getting a Segmentation fault is because you were using a camera configuration that isn't supported by the particular camera you were trying to use. In my case, if I were to use my camera for a YUYV pixel format, I can only go with a max resolution of 1280x720 at 30fps. If I want to choose a lower resolution, I'd have to go with 640x400 at 30fps since that's what is supported.

In your case, I would check if you can use 1920x1080 for YUYV pixel format

Hope this helps!

twdragon commented 2 years ago

Closed due to inactivity