RK3588 opencv读取视频速度慢
我在RK3588上，用opencv读取和播放一个本地视频，发现用opencv读取帧数据耗时过长，每个帧基本上要0.28s左右，如下图所示：然后我在笔记本电脑的ubuntu20.04虚拟机上执行了同样的代码，发现每个帧读取时间要少很多，大致在0.025s，如下图：
请问我如何解决这个问题？谢谢各位~
附：main.cpp源码
#include <opencv2/opencv.hpp>
#include <iostream>
#include <time.h>
using namespace cv;
using namespace std;
int main()
{
clock_t start, end;
clock_t t1, t2, t3, t4;
double open_time, grab_time, read_time, show_time;
namedWindow("example", WINDOW_AUTOSIZE);
Mat mframe;
VideoCapture vcapture;
start = clock();
bool openResult = vcapture.open("/home/zhuzhikai/QT_Programming/sample.mp4");
if (!openResult)
{
cout << "The video cannot be opened!" << endl;
}
end = clock();
open_time = (double)(end-start)/CLOCKS_PER_SEC;
cout << "open_time = " << open_time << " ms " << endl;
int num = 0;
t1 = clock();
while (vcapture.grab())
{
t2 = clock();
grab_time = (double)(t2-t1)/CLOCKS_PER_SEC;
vcapture >> mframe;
t3 = clock();
read_time = (double)(t3-t2)/CLOCKS_PER_SEC;
if (mframe.size().width > 0 || mframe.size().height > 0)
{
imshow("example", mframe);
}
else
{
break;
}
if (waitKey(10) >= 0)
{
break;
}
t4 = clock();
show_time = (double)(t4-t3)/CLOCKS_PER_SEC;
cout << "Frame " << num << ": "
<< "grab_time = " << grab_time << " ms , "
<< "read_time = " << read_time << " ms , "
<< "show_time = " << show_time << " ms" << endl;
num++;
t1 = clock();
}
cout << "frame number = " << num << endl;
return 0;
}
你好，大佬，请问你解决了吗？ opencv在这种板子上解码能力不够吧
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