VIM4 MIPI Camera Usage

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

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

Follow the steps below to install Gstreamer Encoder Plugin:

sudo apt update
sudo apt install gstreamer-aml

Record Video:

gst-launch-1.0 -e v4l2src device=/dev/video50 io-mode=mmap num-buffers=300 ! video/x-raw,format=NV21,width=3840,height=2160,framerate=30/1 ! amlvenc bitrate=8000 ! h264parse ! qtmux ! filesink location=test_50.mp4

Follow the steps below to install OpenCV:

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

Get Frame via V4l2:

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, 3840);
    capture.set(CAP_PROP_FRAME_HEIGHT, 2160);
    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;
}

Get Frame via Gstreamer:

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=3840,height=2160,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