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// YUV422转灰度图            int grayBytes = videoIn->width * videoIn->height;            unsigned char* grayBuf = new unsigned char [grayBytes];            for (int i = 0; i < grayBytes; ++i)            {                grayBuf[i] = videoIn->framebuffer[i * 2];            }            // 灰度图转Mat            int myw = videoIn->width;            int myh = videoIn->height;            Mat temp = Mat(myh, myw, CV_8U, Scalar::all(0));            // 循环赋值            for (int i = 0; i < myh; i++) {                for (int j = 0; j < myw; j++) {                    temp.at
   
    (i, j) = *(grayBuf + j + width * i);                }            }            imwrite("abc.bmp", temp);            delete [] grayBuf;
   

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