我在下面编写了以下代码,以在OpenCV中显示视频。我编译得很好,但是当我运行它时,应该显示视频的窗口打开,但它实际上看不到视频是否正在播放。其他一切似乎都运转良好。宽度,高度和帧数按编码打印在命令行上。谁知道问题是什么?看看吧。
void info()
{
cout << "This program will accept input video with fixed lengths and produce video textures" << endl;
}
int main(int argc, char *argv[])
{
info();
if(argc != 2)
{
cout << "Please enter more parameters" << endl;
return -1;
}
const string source = argv[1];
VideoCapture input_vid(source);
if(! input_vid.isOpened())
{
cout << "Error: Could not find input video file" << source << endl;
return -1;
}
Size S = Size((int) input_vid.get(CV_CAP_PROP_FRAME_WIDTH), //Acquire size of input video
(int) input_vid.get(CV_CAP_PROP_FRAME_HEIGHT));
cout << "Width: = " << S.width << " Height: = " << S.height << " Number of frames: " << input_vid.get(CV_CAP_PROP_FRAME_COUNT)<<endl;
const char* PLAY = "Video player";
namedWindow(PLAY, CV_WINDOW_AUTOSIZE);
//imshow(PLAY,100);
char c;
c = (char)cvWaitKey(27);
//if ( c == 27)break;
return 0;
}
答案 0 :(得分:0)
假设视频来自网络摄像头:
capture = CaptureFromCAM( 0 );
SetCaptureProperty(capture,CV_CAP_PROP_FRAME_HEIGHT, 640);
SetCaptureProperty(capture,CV_CAP_PROP_FRAME_WIDTH, 480);
这将解决您的问题
答案 1 :(得分:0)
另一个简单的调整可能是使用CV_WINDOW_NORMAL而不是CV_WINDOW_AUTOSIZE
namedWindow(PLAY, CV_WINDOW_AUTOSIZE);
可让您手动调整窗口大小