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products:sbc:vim3:add-ons:vim3-mipi-camera
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VIM3 MIPI Camera Usage
Linux
Upgrade System
Please follow the documentation to upgrade your system to latest version.
Video Node
The video node for MIPI camera is /dev/video50.
Record Video via Gstreamer
Follow the steps below to install Gstreamer Encoder Plugin:
sudo apt update sudo apt install gstreamer-aml
Record Video:
gst-launch-1.0 v4l2src device=/dev/video50 io-mode=mmap num-buffers=300 ! video/x-raw,format=NV21,width=1920,height=1080,framerate=30/1 ! amlvenc bitrate=8000 ! h264parse ! qtmux ! filesink location=test_50.mp4
Record Video with OpenCV
Follow the steps below to install OpenCV:
sudo apt update sudo apt install libopencv-dev python3-opencv
VIM4
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; }
VIM3
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)); 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
Last modified: 2024/05/11 03:48 by ivan