在进行初始化等工作之后调用avcodec_decode_video，返回值是正确的整型数据，填入的buff和size都是正确的，而第二个参数AVFrame*指向的data和linesize都是空(错误的指针)?求指教。

Does a utility exist that will query the installed GPU and report whether it supports hardware-accelerated encode and decode of h.264, h.265, etc? Because googling an AMD part number and trying to ...