RTMP读流和推流实验

1、打开rtmp读流地址：

 1    const char* filename ="rtmp://live.hkstv.hk.lxdns.com/live/hks
 2     int ret;
 3     if ((ret = avformat_open_input(&pFormatCtx, filename, NULL, NULL)) < 0)
 4     {
 5         abort();
 6     }
 7 
 8     videoStreamIndex = 0;
 9 
10     if ((ret = avformat_find_stream_info(pFormatCtx, 0)) < 0)
11     {
12         abort();
13     }
14 
15     //解码视频
16     pCodeCtx = pFormatCtx->streams[videoStreamIndex]->codec;
17 
18     //获取解码器   
19     pCodec = avcodec_find_decoder(pCodeCtx->codec_id);
20     if (pCodec == NULL)
21     {
22         abort();
23     }
24     if (pCodec->capabilities & CODEC_CAP_TRUNCATED)
25     {
26         pCodeCtx->flags |= CODEC_FLAG_TRUNCATED;
27     }
28     if (avcodec_open2(pCodeCtx, pCodec, NULL) < 0)
29     {
30         abort();
31     } 

2、打开rtmp推流地址

const char* out_file = "rtmp://live-push.meidou.d3dstore.com/live/200446?tm=20160907155557&sign=30f1877d6fab32de9a555f1285c7e1ed";
    in_w = 1776;
    in_h = 888;
    avformat_alloc_output_context2(&ppFormatCtx, NULL, "flv", out_file);
    ppCodec = avcodec_find_encoder(AV_CODEC_ID_H264);

    if (!ppCodec)
    {
        //printf("Can not find encoder! 
");
        //return;
        AfxMessageBox("Can not find encoder!");
        return;
    }
    pCodecCtx = avcodec_alloc_context3(ppCodec);
    pCodecCtx->pix_fmt = PIX_FMT_YUV420P;
    pCodecCtx->width = in_w;
    pCodecCtx->height = in_h;
    pCodecCtx->time_base.num = 1;
    pCodecCtx->time_base.den = 20;// 25;// 25;
    pCodecCtx->bit_rate = 2000000;// 400000;
    pCodecCtx->gop_size = 500;// 250;
    pCodecCtx->qcompress = 0.6;
    
    pCodecCtx->thread_count = 4;//将帧分块，由不同的进程分别编码，0 for auto



    if (ppFormatCtx->oformat->flags & AVFMT_GLOBALHEADER)
        pCodecCtx->flags |= CODEC_FLAG_GLOBAL_HEADER;

    //H264 codec param
    pCodecCtx->me_range = 16;
    pCodecCtx->max_qdiff = 4;
    //pCodecCtx->qcompress = 0.6;
    pCodecCtx->qmin = 10;
    pCodecCtx->qmax = 23;// 20;// 51;//编码质量，值越大，质量越差，最差为51
    //Optional Param
    pCodecCtx->max_b_frames = 3;
    // Set H264 preset and tune
    AVDictionary *param = 0;
    av_dict_set(&param, "preset", "fast", 0);
    av_dict_set(&param, "tune", "zerolatency", 0);

    if (avcodec_open2(pCodecCtx, ppCodec, &param) < 0)
    {
        //printf("Failed to open encoder! 
");
        AfxMessageBox("Failed to open encoder!");
        return;

    }