OpenCV VideoCapture根本无法从我的网络摄像头读取
我在Ubuntu 13.04上使用OpenCV 2.4.6（在Acer C7 Chromebook上），我正在使用一个简单的测试程序来查看我的摄像头是否可以与OpenCV一起使用。 它适用于奶酪和Skype，所以我知道摄像头本身不是问题。
这是我的代码（编译没有任何错误）：
#include "opencv2/opencv.hpp"
#include <stdio.h>
#include <stdlib.h>
using namespace std;
using namespace cv;
int main(int argc, char *argv[])
{
cv::VideoCapture cap;
if(argc > 1)
{
cap.open(string(argv[1]));
}
else
{
cap.open(CV_CAP_ANY);
}
if(!cap.isOpened())
{
printf("Error: could not load a camera or video.n");
}
Mat frame;
namedWindow("video", 1);
for(;;)
{
waitKey(20);
cap >> frame;
if(!frame.data)
{
printf("Error: no frame data.n");
break;
}
imshow("video", frame);
}
}
如果我没有任何参数运行程序（因为我希望它使用CV_CAP_ANY），我可以得到
Error: could not load a camera or video.
init done
opengl support available
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12
Error: no frame data.
如果我指定/ dev / video0（我唯一的相机）作为参数，我会得到
demux_wavpack: (open_wv_file:127) open_wv_file: non-seekable inputs aren't supported yet.
(ERROR)icvOpenAVI_XINE(): Unable to open source '/dev/video0'
init done
opengl support available
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12
libpng warning: Application built with libpng-1.2.49 but running with 1.5.12
GStreamer Plugin: Embedded video playback halted; module source reported: Could not read from resource.
Error: no frame data.
如果我将视频文件的路径指定为参数，则播放视频就好了。
我会很感激任何帮助。 提前致谢！
Opencv 2.4.6有一个错误，请看看这里
此外试试这个：cv :: VideoCapture cap = cv :: VideoCapture（0）;
希望它有帮助！
您可以尝试将waitKey(20)值更改为20，直到80.某台计算机的值为20,30,40,50 ....