问题描述

关于视频处理的问题。

void CALLBACK DecCBFun(long lPort,char * pBuf,long nSize,FRAME_INFO * pFrameInfo, long nReserved1,long nReserved2)
{
long lFrameType=pFrameInfo->nType;

if(lFrameType==T_YV12)
{

    long iWidth=pFrameInfo->nWidth;
    long iHeight=pFrameInfo->nHeight;

    unsigned char *pYV12=(unsigned char*)pBuf;
    unsigned char* pRGB24=??????;

    YV12_to_RGB24( pYV12, pRGB24, iWidth, iHeight);

}

}

int YV12_to_RGB24(unsigned char* pYV12, unsigned char* pRGB24, long iWidth, long iHeight)
{

if(!pYV12 || !pRGB24)
{

    cout<<"error "<<endl;
    return -1;
}
const long nYLen = long(iHeight * iWidth);
const int nHfWidth = (iWidth>>1);
if(nYLen<1 || nHfWidth<1) 

    return -1;

unsigned char* yData = pYV12;
unsigned char* vData = &yData[nYLen];
unsigned char* uData = &vData[nYLen>>2];

if(!uData || !vData)
    return -1;
int rgb[3];
int i, j, m, n, x, y;
m = -iWidth;
n = -nHfWidth;

for(y=0; y < iHeight; y++)
{
    m += iWidth;
    if(!(y % 2))
    n += nHfWidth;
    for(x=0; x < iWidth; x++)
    {
        i = m + x;
        j = n + (x>>1);
        rgb[2] = int(yData[i] + 1.370705 * (vData[j] - 128)); // r分量值
        rgb[1] = int(yData[i] - 0.698001 * (uData[j] - 128)  - 0.703125 * (vData[j] - 128)); // g分量值
        rgb[0] = int(yData[i] + 1.732446 * (uData[j] - 128)); // b分量值
        j = nYLen - iWidth - m + x;
        i = (j<<1) + j;
        for(j=0; j<3; j++)
        {
            if(rgb[j]>=0 && rgb[j]<=255)
                pRGB24[i + j] = rgb[j];
            else
                pRGB24[i + j] = (rgb[j] < 0) ? 0 : 255;
         }

        //  processVideo(pRGB24[i + j]);
    }
    //Mat img(pRGB24[i+j]);
    imshow("window",pRGB24[i+j]);
}

    return 0;

}
关于海康摄像头得到的数据，我想用opencv做处理，但是他的视频格式是YV12，我现在用上面这个函数转换，但是我不知道unsigned char* pRGB24=?????该怎么定义，希望大家帮帮忙 ，谢谢大家了

解决方案

http://blog.163.com/cgq_i/blog/static/7287792320110123408681/