ISTANBUL Posted January 18, 2019 Share Posted January 18, 2019 Hi, I am strugling with the OV13850 camera on the NanoPC T4. Its working with the command : GStreamer 1.1 command: gst-launch-1.0 rkisp io-mode=4 path-iqf=/etc/cam_iq/rk-ov13850.xml ! video/x-raw,format=NV12,width=1280,height=720,framerate=30/1 ! rkximagesink But I can not connect to it through OepnCv VideoCapture cap(0) . or 1 2 3 . It give s error : VIDIOC_QUERYCTRL: Inappropriate ioctl for device Is there anybody experienced on this ? thx Link to comment Share on other sites More sharing options...
JulesThuillier Posted March 7, 2019 Share Posted March 7, 2019 Hi ! I am also trying to get the camera (OV4689 though) to work on a Nano Pi M4. May I ask how did you get to have the rkisp installed ? (What kernel config option did you use ?) And how did you get the /etc/cam_iq/rk-ov13850.xml file ? Did you add it yourself or was it directly from Armbian sources ? Concerning your question, have you been configuring the ISP module before using the camera ? Check the "Linux" part in the link below. It says Quote The applcation for plain v4L2 capture device still can be used(like gstreamer v4l2src plugins, v4l2ctl), but the media controller must be setup in a proper state before starting capture. http://opensource.rock-chips.com/wiki_Rockchip-isp1 In the gstreamer plugin, it takes care of configuring the media-ctl, before the v4l2-ctl, but if you don't use gstreamer you have to configure it yourself. Also you can look at the PDF I attached, it shows you an example to use gstreamer in cv.VideoCapture. Cheers Jules Rockchip_Linux_OpenCV_开发指南.zh-CN.en.pdf Link to comment Share on other sites More sharing options...
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