RV1106 hand-in-hand teaching you: 4 lines of code use the Linux v4l2 interface to call the USB camera to take pictures and save them continuously

LitchiCheng

RV1106 hand-in-hand teaching you: 4 lines of code use the Linux v4l2 interface to call the USB camera to take pictures and save them continuously [Copy link]

 

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The C++ library is encapsulated for v4l2, which is convenient for integration with other tests later. The warehouse address is as follows. If you are interested, you can clone it. Please give it a star.

LitchiCheng/RV1106_Linux: Linux test for RV1106 dev board (github.com)

The following is the test code for calling the USB camera and saving continuous photos

#include <iostream>
#include "v4l2CapPicTool.h"
#include "timecost.h"

int main(int argc, char const *argv[])
{
    v4l2CapPicTool vt("/dev/video0", 1080, 960, "jpg");
    vt.init();
    while (1){
        usleep(100000);
        {
            timecost tmp("capture");
            vt.capture();
        }  
        {
            timecost tmp("save");
            vt.save("./test.jpg"); 
        }
    }
    return 0;
}

Simultaneous testing, capture time

pico@luckfox:~$ sudo ./captureJpgApp
init success
capturetime spent:0.382155sec
savetime spent:0.003527sec
capturetime spent:0.073295sec
savetime spent:0.001937sec
capturetime spent:0.030448sec
savetime spent:0.003411sec
capturetime spent:0.025701sec
savetime spent:0.001992sec
capturetime spent:0.031095sec
savetime spent:0.003586sec
capturetime spent:0.025089sec
savetime spent:0.004171sec
capturetime spent:0.02678sec
savetime spent:0.001836sec
capturetime spent:0.031064sec
savetime spent:0.001938sec

As you can see, the capture time is about 0.03s, which is 30ms per frame, corresponding to 30fps.

damiaa

Thanks for sharing!

LitchiCheng

damiaa posted on 2024-3-10 10:25 Thank you for sharing!

Thank you for your support

常见泽1

Does this thing look similar to opencv?

LitchiCheng

Common Ze 1 posted on 2024-3-10 11:38 Does this thing look similar to opencv?

It's not the same concept. Opencv calls the camera through v4l2, but Opencv is more important for image processing.

biubiubiub

How to connect to CSI camera?