This document mainly introduces OS08A10 MIPI Camera. The document is divided into two parts,The first part of the document describes how to connect. The second part introduces How to record video via Gstreamer and test your camera under Ubuntu.

Please check the documentation to identify your VIM4 version.

Please follow the documentation to upgrade your system to latest version.

The video node for MIPI camera is /dev/video50.

sudo apt update
sudo apt install gstreamer-aml

gst-launch-1.0 v4l2src device=/dev/video50 io-mode=mmap num-buffers=300 ! video/x-raw,format=NV12 ! amlvenc bitrate=8000 ! h264parse ! qtmux ! filesink location=test_50.mp4

sudo apt update
sudo apt install libopencv-dev python3-opencv

mipi-camera.cpp

#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/core/core.hpp>
#include <iostream>
#include <string>
using
namespace  cv;
 
using
namespace  std;
 
int main(int argc, char** argv)
{
    int count=100;
    string str = argv[1];
    string res=str.substr(10);
    VideoCapture capture(stoi(res), CAP_V4L2);
    capture.set(CAP_PROP_FOURCC, VideoWriter::fourcc('U','Y','V','Y'));
    capture.set(CAP_PROP_FRAME_WIDTH, 1920);
    capture.set(CAP_PROP_FRAME_HEIGHT, 1080);
    while (count)
    {
        Mat frame;
        capture >> frame;
 
        if (frame.empty()) {
            break;
        }
        int h = frame.rows;
        int w = frame.cols;
        const char *name = "video";
        namedWindow(name, 0);
        imshow(name, frame);
        waitKey(30);
        count--;
    }
    return 0;
}

mipi-camera.cpp

#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/core/core.hpp>
#include <iostream>
#include <string>
using
namespace  cv;
 
using
namespace  std;
 
int main(int argc, char** argv)
{
    int count=100;
    string str = argv[1];
    string gstformat = "NV12";
    string gstfile = "v4l2src device=" + str + " ! video/x-raw,format=" + gstformat + ",width=1920,height=1080,framerate=30/1 ! videoconvert ! appsink";
    VideoCapture capture(gstfile);
 
    while (count)
    {
        Mat frame;
        capture >> frame;
 
        if (frame.empty()) {
            break;
        }
        int h = frame.rows;
        int w = frame.cols;
        const char *name = "video";
        namedWindow(name, 0);
        imshow(name, frame);
        waitKey(30);
        count--;
    }
    return 0;
}

Compile:

gcc -o mipi mipi-camera.cpp -lopencv_imgproc -lopencv_core -lopencv_videoio -lopencv_imgcodecs -lopencv_highgui -std=c++11 -std=gnu++11 -Wall -std=c++11 -lstdc++ -I/usr/include/opencv4

Test:

./mipi /dev/video50

If you want to use the OS08A10 MIPI camera, you need to enable it in overlays, you need to add vim4n-os08a10 to fdt_overlays in /boot/dtb/amlogic/kvim4.dtb.overlay.env.

$ cat /boot/dtb/amlogic/kvim4.dtb.overlay.env 
fdt_overlays=vim4n-os08a10

And then reboot to take effect.

The video node is /dev/media0.

You can get the test source code here: https://github.com/numbqq/v4l2_media_test

Download and build the test source code:

$ git clone https://github.com/numbqq/v4l2_media_test
$ cd v4l2_media_test
$ git checkout e0482794337c01935593a91b621f9c42123cf175
$ g++ v4l2_test_raw.cpp -o v4l2_test_raw  -Wall -Wno-int-to-pointer-cast -Wno-pointer-to-int-cast -pthread -fPIE -lispaml -ldl -lmediaAPI -ltuning -lm -fPIC -D_FORTIFY_SOURCE=2 -O3
$ ls v4l2_test_raw
v4l2_test_raw

$ git clone https://github.com/numbqq/v4l2_media_test
$ cd v4l2_media_test
$ g++ v4l2_test_raw.cpp -o v4l2_test_raw  -Wall -Wno-int-to-pointer-cast -Wno-pointer-to-int-cast -pthread -fPIE -lispaml -ldl -lmediaAPI -ltuning -llens -lm -fPIC -D_FORTIFY_SOURCE=2 -O3
$ ls v4l2_test_raw
v4l2_test_raw

Test:

$ ./v4l2_test_raw -p 0 -n 10 -m /dev/media0

It will capture 10 frames to file /tmp/dst_mif_0.yuv.

Preview the file:

$ ffplay -f rawvideo -pixel_format nv21 -video_size 3840x2160 /tmp/dst_mif_0.yuv

• Buy OS08S10-8MP camera
• OS08A10 Hardware Documentations