iplimage和avframe之间的转换

Question

现在我使用sws_scale将avframe转换为iplimage，然后使用opencv对图像进行一些操作，然后将iplimage转换为avframe，但图像看起来比原始图像更加紫色。这是我的代码

int av2ipl(AVFrame *src, IplImage *dst, int height, int width)
{ 
    struct SwsContext *swscontext = sws_getContext(width, height, PIX_FMT_YUV420P, dst->width, dst->height, PIX_FMT_BGR24, SWS_BILINEAR, 0, 0, 0); 
    if (swscontext == 0) 
        return 0; 
    int linesize[4] = {dst->widthStep, 0, 0, 0 }; 
    sws_scale(swscontext, src->data, src->linesize, 0, height, (uint8_t **) & (dst->imageData), linesize); 
    return 1; 
}

int ipl2av(IplImage* src, AVFrame* dst, int height, int width)
{
    struct SwsContext *swscontext = sws_getContext(width, height, PIX_FMT_BGR24,     width, height, PIX_FMT_YUV420P, SWS_BILINEAR, 0, 0, 0); 
    if(swscontext == 0)
        return 0;
    int linesize[4] = {src->widthStep, 0, 0, 0};
    sws_scale(swscontext, (uint8_t **) & (src->imageData), linesize, 0, height, dst-       >data, dst->linesize);
    return 1;
}

代码有什么问题吗？