Encoding 如何将GPU设备ID传递给NVENC

我们使用的库与NVIDIA提供的示例大致相似。但是，这些示例是针对单个GPU场景设计的

在我们的服务器上，我们有8个开普勒K10 GPU，我们希望传递一个参数作为设备ID作为输入，然后将其传递给库中的NVENC API。有办法吗

以下是init函数：

static av_cold int NVENC_init(AVCodecContext *avctx)
{

        NVENCContext *x4 = avctx->priv_data;

        x4->p_nv264IntefaceCtxt = (nv264InterfaceCtxt *)av_malloc(sizeof(nv264InterfaceCtxt));

        x4->p_nv264IntefaceCtxt->width       = avctx->width;
        x4->p_nv264IntefaceCtxt->height      = avctx->height;
        if (avctx->bit_rate) {
                x4->p_nv264IntefaceCtxt->avgBitRate  = avctx->bit_rate;
        }else
        {
                x4->p_nv264IntefaceCtxt->avgBitRate = 128000;
        }
        x4->p_nv264IntefaceCtxt->peakBitRate = 1.1*(x4->p_nv264IntefaceCtxt->avgBitRate);
        if (avctx->gop_size >= 0)
        {
                x4->p_nv264IntefaceCtxt->gopLength = avctx->gop_size;
        }
        else
        {
                x4->p_nv264IntefaceCtxt->gopLength = 30;
        }

        x4->p_nv264IntefaceCtxt->frameRateNum = x4->frameRateNum ;
        x4->p_nv264IntefaceCtxt->frameRateDen = x4->frameRateDen;
        x4->p_nv264IntefaceCtxt->rc_mode = x4->rc_mode;
        x4->p_nv264IntefaceCtxt->idr_period = x4->p_nv264IntefaceCtxt->gopLength;
        x4->p_nv264IntefaceCtxt->insertSEIMessage = x4->insertSEIMessage;
        x4->p_nv264IntefaceCtxt->cabacenable      = x4->cabacenable;
        x4->p_nv264IntefaceCtxt->profile          = x4->profile;
        x4->p_nv264IntefaceCtxt->gpu_number       = x4->gpu_number;

        x4->opStreamBufAllocSize = (avctx->width) * (avctx->height);
        x4->p_opStream = (unsigned char *)malloc(x4->opStreamBufAllocSize*sizeof(unsigned char));
        if(NULL == x4->p_opStream)
        {
                return -1;
        }

        if(0 != nv264Enc_Init(x4->p_nv264IntefaceCtxt))
        {
                return -1;
        }

        // copy the extradate to appropriate structure
        if ((avctx->flags & CODEC_FLAG_GLOBAL_HEADER) && (x4->p_nv264IntefaceCtxt->spsSize > 0)) {
                uint8_t *p;

                avctx->extradata = p = av_malloc(x4->p_nv264IntefaceCtxt->spsSize);
         memcpy(p,x4->p_nv264IntefaceCtxt->spsbuffer,x4->p_nv264IntefaceCtxt->spsSize);
                avctx->extradata_size = x4->p_nv264IntefaceCtxt->spsSize;
        }
        return 0;
}

检查NV264 ENC_Init（x4->p_NV264 INTEFACECTXT））函数

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您的答案在此函数中。：）

我建议你在这里加上CUDA以外的标签。@RobertCrovella我们需要一个标签“nvenc”，我想这是不存在的。