OpenCV / C ++-从视频文件读取的帧在视频结束后重新启动

Question

I'm trying to get each frame from an mp4 video with OpenCV. I followed the standard examples but for some reason, when the last frame is read, the loop does not terminate but in fact starts again. Here is the code:

while (1) {
        inputVideo.read(inputFrame);
        nFrames = inputVideo.get(CV_CAP_PROP_POS_FRAMES);
        cout << "Frame: " << nFrames << endl;
        n++;
    }

Why doesn't it stop after all the frames have been processed?

Answer 1

您可以使用inputVideo.get（）来检测框架在文件中的位置，并使用它在结尾处断开