【已解决】从vpss通道获取yuv数据出现颜色异常

从vpss通道获取yuv数据输出要vpss进行crop后且高度小于1080，得到的yuv数据就会有部分花屏，但是裁剪成1844*1080或者1600 1080，yuv图像显示正常。高度小于1080时，图像会出现紫色区域，随高度减少，紫色区域逐渐增大，在高度为720左右，紫色区域覆盖整张yuv图像，此时y分量显示正常，即只显示y分量，图像呈正确的黑白色。

void sample_yuv_8bit_dump(VIDEO_FRAME_S* pVBuf, FILE* pfd)
{
unsigned int w, h;
char* pVBufVirt_Y;
char* pVBufVirt_C;
char* pMemContent;
unsigned char TmpBuff[MAX_FRM_WIDTH]; //If this value is too small and the image is big, this memory may not be enough

HI_U64 phy_addr;
PIXEL_FORMAT_E  enPixelFormat = pVBuf->enPixelFormat;
HI_U32 u32UvHeight = 0;/*When the storage format is a planar format, this variable is used to keep the height of the UV component */
HI_BOOL bUvInvert;

    u32Size = (pVBuf->u32Stride[0]) * (pVBuf->u32Height) * 3 / 2;
    u32UvHeight = pVBuf->u32Height / 2;

phy_addr = pVBuf->u64PhyAddr[0];

pUserPageAddr[0] = (HI_CHAR*) HI_MPI_SYS_Mmap(phy_addr, u32Size);

if (HI_NULL == pUserPageAddr[0])
{
    return;
}

pVBufVirt_Y = pUserPageAddr[0];
pVBufVirt_C = pVBufVirt_Y + (pVBuf->u32Stride[0]) * (pVBuf->u32Height);

/* save Y ----------------------------------------------------------------*/
fprintf(stderr, "saving......Y......");
fflush(stderr);

for (h = 0; h < pVBuf->u32Height; h++)
{
    pMemContent = pVBufVirt_Y + h * pVBuf->u32Stride[0];
    fwrite(pMemContent, pVBuf->u32Width, 1, pfd);
}


    fflush(pfd);
    /* save U ----------------------------------------------------------------*/
    fprintf(stderr, "U......");
    fflush(stderr);

    for (h = 0; h < u32UvHeight; h++)
    {
        pMemContent = pVBufVirt_C + h * pVBuf->u32Stride[1];

         pMemContent += 1;

        for (w = 0; w < pVBuf->u32Width / 2; w++)
        {
            TmpBuff[w] = *pMemContent;
            pMemContent += 2;
        }

        fwrite(TmpBuff, pVBuf->u32Width / 2, 1, pfd);
    }

    fflush(pfd);

    /* save V ----------------------------------------------------------------*/
    fprintf(stderr, "V......");
    fflush(stderr);

    for (h = 0; h < u32UvHeight; h++)
    {
        pMemContent = pVBufVirt_C + h * pVBuf->u32Stride[1];

        for (w = 0; w < pVBuf->u32Width / 2; w++)
        {
            TmpBuff[w] = *pMemContent;
            pMemContent += 2;
        }

        fwrite(TmpBuff, pVBuf->u32Width / 2, 1, pfd);
    }

fflush(pfd);

fprintf(stderr, "done %d!\n", pVBuf->u32TimeRef);
fflush(stderr);

HI_MPI_SYS_Munmap(pUserPageAddr[0], u32Size);
pUserPageAddr[0] = HI_NULL;

}