FriendlyELEC-Forum

Posted: **Sun Jan 13, 2019 2:16 pm**

When I try to open internal /dev/video0 . camera from open cv with VideoCapture cap(0) I have below error :

VIDIOC_QUERYCTRL: Inappropriate ioctl for device

How can I use onboard cameras with the OpenCV ?

Posted: **Tue Jan 15, 2019 3:37 pm**

No body ?

This is the one of the most importan feature that edge developer needs ?

How we can use ov13850 onboard camera from opencv ??

please help

Posted: **Wed Jan 30, 2019 4:50 am**

Opening by cam id doesn't work : VIDIOC_QUERYCTRL: Inappropriate ioctl for device

Code: Select all

cap=cv2.VideoCapture(0)

Opening by /dev/video0 won't work : VIDIOC_QUERYCTRL: Inappropriate ioctl for device

Code: Select all

cap=cv2.VideoCapture("/dev/video0", cv2.CAP_V4L)

The only work around is to go through gstreamer:

Code: Select all

cap=cv2.VideoCapture("rkisp device=/dev/video0 sensor-id=1 io-mode=4 path-iqf=/etc/cam_iq/rk-ov13850.xml ! video/x-raw,format=NV12,width=640,height=480,framerate=30/1 ! videoconvert ! appsink",cv2.CAP_GSTREAMER)

source from https://www.friendlyarm.com/Forum/viewtopic.php?f=62&t=2104
Not sure if this is optimal but for now it works. Hope FriendlyElec can support a more compatible v4l2 driver in the near future (hint hint).

FriendlyELEC-Forum

OPENCV does not see cam(0 )How we can see internal cam?

OPENCV does not see cam(0 )How we can see internal cam?

Re: OPENCV does not see cam(0 )How we can see internal cam?

Re: OPENCV does not see cam(0 )How we can see internal cam?