修改yv12像素值

YV12内存布局


 1 unsigned char *pY = (unsigned char *)pBuf;
 unsigned char *pV = pY + nWidth * nHeight;
 unsigned char *pU = pV + (nWidth>>)*(nHeight>>);

 //加上出入口数字指纹,以便确认识别出来的是哪个口
 if(nPort==)
 {
 pY[]=;
 pV[]=;
 pU[]=;
 }
 else
 {
 pY[]=;
 pV[]=;
 pU[]=;
 }