解决办法： error: passing ‘const VideoFrame’ as ‘this’ argument discards qualifiers [-fpermissive]

　　有以下错误：

void process(const VideoFrame* pFrame)
{
    pFrame->saveToJpeg();
}

编译时出错：
error: passing ‘const VideoFrame’ as ‘this’ argument discards qualifiers [-fpermissive]

　　原因是参数作为const。修改如下即可：

((VideoFrame*)pFrame)->saveToJpeg();