不管怎样

cv::Mat srcI420(cv::Size(W, H * 3 / 2), CV_8UC1);int W = 1280, H = 720; //Assume resolution of Y plane is 1280x720//Pointer to Y planeunsigned char *pY = (unsigned char*)srcI420.data;//Y plane as cv::Mat, resolution of srcY is 1280x720cv::Mat srcY

opecv BGR转NV21在opencv中，并没有直接转NY21的方法，所以需要先转到YUV_I420再转成NV21。YUV_I420为Y之后是所有的U分量，再接所有的V分量。而NV21则是Y之后VU分量交替。因此Y数据完整复制，V和U数据隔一个字节取一个。void BGR2YUV_NV21(const Mat &src, Mat &dst){ // 先转BGR到YUV_I420 cvtColor(src, dst, CV_BGR2YUV_I420); // 再从YU

opencv videocapture读取视频编译通过，但运行时调用isOpened()返回false。沿着代码一步步Debug进去，发现如下代码：CvCapture* cvCreateFileCapture_FFMPEG_proxy(const char * filename){ CvCapture_FFMPEG_proxy* result = new CvCapture_FFMPEG_

转自：https://www.520mwx.com/view/7113设置环境变量ANDROID_NDK=ANDROID_SDK=下载源码git clone https://github.com/opencv/opencvcd opencvgit checkout -b 3.4.2 3.4.2cd ..git clone https://github.com/opencv/op...