openc mat转yuyv

#define IMAGE_WIDTH (1280)
#define IMAGE_HIGHT (960)
#define IMAGE_SPACE (30) //采样间隔 30帧存一组
//-----------------------------------【main( )函数】--------------------------------------------
// 描述：控制台应用程序的入口函数，我们的程序从这里开始
//-------------------------------------------------------------------------------------------------

static void mat2yuyv(Mat &frame, unsigned char *yuyv)
{
Mat img_yuv;
std::vector<Mat>yuv;
int i = 0;
int j = 0;

cv::cvtColor(frame, img_yuv, COLOR_RGB2YUV);
cv::split(img_yuv, yuv);

for (j = 0; j < IMAGE_HIGHT; j++)
{
for (i = 0; i < IMAGE_WIDTH; i++)
{
//给yuv赋值
yuyv[j * 1280 * 2 + i * 2] = yuv[0].at<uchar>(j, i);

if (i % 2 == 0)
{
yuyv[j * 1280 * 2 + i * 2 + 1] = yuv[1].at<uchar>(j, i);
}
else
{
yuyv[j * 1280 * 2 + i * 2 + 1] = yuv[2].at<uchar>(j, i);
}

}
}
}