Simple-RTMP-Server 伺服器測試

1. 伺服器映象獲取
   github原始碼地址
   git clone https://github.com/winlinvip/simple-rtmp-server.git
2. 編譯系統
   ./configure –disable-all –with-ssl –with-hls –with-nginx –with-ffmpeg –with-transcode
   make
   make install
   安裝命令會將SRS預設安裝到/usr/local/srs中，可以在configure時指定其他目錄，譬如./configure –prefix=pwd/_release 可以安裝到當前的_release目錄

3. 建立啟動服務
   3.1 建立軟連線
   sudo ln -sf /usr/local/srs/etc/init.d/srs /etc/init.d/srs
   備註：若SRS安裝到其他目錄，將/usr/local/srs替換成其他目錄。
   3.2 新增服務
   sudo /sbin/chkconfig –add srs
   4.3 使用init.d指令碼管理SRS
   檢視SRS狀態：
   /etc/init.d/srs status
   啟動SRS：
   /etc/init.d/srs start
   停止SRS：
   /etc/init.d/srs stop
   重啟SRS：
   /etc/init.d/srs restart
   Reload SRS：
   /etc/init.d/srs reload

4. 伺服器開放1935埠

5. FFmpeg推流
   5.1推流本地flv檔案
   ffmpeg -re -i /Users/sample.flv -vcodec libx264 -acodec aac -f flv rtmp://阿里雲伺服器公網ip:1935/rtmplive/home
   5.2程式碼推流

#include <iostream>
#include <stdio.h>

extern "C"
{
#include "libavformat/avformat.h"
#include "libavutil/mathematics.h"
#include "libavutil/time.h"
}

int main(int argc, char* argv[])
{
    AVOutputFormat *ofmt = NULL;
    AVFormatContext *ifmt_ctx = NULL, *ofmt_ctx = NULL;
    AVPacket pkt;
    const char *in_filename, *out_filename;
    int ret, i;
    int videoindex=-1;
    int frame_index=0;
    int64_t start_time=0;
    in_filename  = "/Users/stellazhou/Documents/音視訊測試檔案/sample.flv";
    out_filename = "rtmp://阿里雲伺服器公網ip/live/livestream";

    av_register_all();
    avformat_network_init();

    if ((ret = avformat_open_input(&ifmt_ctx, in_filename, 0, 0)) < 0) {
        printf( "Could not open input file.");
        goto end;
    }
    if ((ret = avformat_find_stream_info(ifmt_ctx, 0)) < 0) {
        printf( "Failed to retrieve input stream information");
        goto end;
    }

    for(i=0; i<ifmt_ctx->nb_streams; i++)
        if(ifmt_ctx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO){
            videoindex=i;
            break;
        }

    av_dump_format(ifmt_ctx, 0, in_filename, 0);

    //輸出（Output）
    avformat_alloc_output_context2(&ofmt_ctx, NULL, "flv", out_filename); //RTMP
    if (!ofmt_ctx) {
        printf( "Could not create output context\n");
        ret = AVERROR_UNKNOWN;
        goto end;
    }
    ofmt = ofmt_ctx->oformat;
    for (i = 0; i < ifmt_ctx->nb_streams; i++) {
        //根據輸入流建立輸出流（Create output AVStream according to input AVStream）
        AVStream *in_stream = ifmt_ctx->streams[i];
        AVStream *out_stream = avformat_new_stream(ofmt_ctx, in_stream->codec->codec);
        if (!out_stream) {
            printf( "Failed allocating output stream\n");
            ret = AVERROR_UNKNOWN;
            goto end;
        }
        //複製AVCodecContext的設定（Copy the settings of AVCodecContext）
        ret = avcodec_copy_context(out_stream->codec, in_stream->codec);
        if (ret < 0) {
            printf( "Failed to copy context from input to output stream codec context\n");
            goto end;
        }
        out_stream->codec->codec_tag = 0;
        if (ofmt_ctx->oformat->flags & AVFMT_GLOBALHEADER)
            out_stream->codec->flags |= CODEC_FLAG_GLOBAL_HEADER;
    }

    //Dump Format------------------
    av_dump_format(ofmt_ctx, 0, out_filename, 1);
    //開啟輸出URL（Open output URL）
    if (!(ofmt->flags & AVFMT_NOFILE)) {
        ret = avio_open(&ofmt_ctx->pb, out_filename, AVIO_FLAG_WRITE);
        if (ret < 0) {
            printf( "Could not open output URL '%s'", out_filename);
            goto end;
        }
    }
    //寫檔案頭（Write file header）
    ret = avformat_write_header(ofmt_ctx, NULL);
    if (ret < 0) {
        printf( "Error occurred when opening output URL\n");
        goto end;
    }

    start_time=av_gettime();
    while (1) {
        AVStream *in_stream, *out_stream;
        //獲取一個AVPacket（Get an AVPacket）
        ret = av_read_frame(ifmt_ctx, &pkt);
        if (ret < 0)
            break;
        //FIX：No PTS (Example: Raw H.264)
        //Simple Write PTS
        if(pkt.pts==AV_NOPTS_VALUE){
            //Write PTS
            AVRational time_base1=ifmt_ctx->streams[videoindex]->time_base;
            //Duration between 2 frames (us)
            int64_t calc_duration=(double)AV_TIME_BASE/av_q2d(ifmt_ctx->streams[videoindex]->r_frame_rate);
            //Parameters
            pkt.pts=(double)(frame_index*calc_duration)/(double)(av_q2d(time_base1)*AV_TIME_BASE);
            pkt.dts=pkt.pts;
            pkt.duration=(double)calc_duration/(double)(av_q2d(time_base1)*AV_TIME_BASE);
        }
        //Important:Delay
        if(pkt.stream_index==videoindex){
            AVRational time_base=ifmt_ctx->streams[videoindex]->time_base;
            AVRational time_base_q={1,AV_TIME_BASE};
            int64_t pts_time = av_rescale_q(pkt.dts, time_base, time_base_q);
            int64_t now_time = av_gettime() - start_time;
            if (pts_time > now_time)
                av_usleep(pts_time - now_time);

        }

        in_stream  = ifmt_ctx->streams[pkt.stream_index];
        out_stream = ofmt_ctx->streams[pkt.stream_index];
        /* copy packet */
        //轉換PTS/DTS（Convert PTS/DTS）
        pkt.pts = av_rescale_q_rnd(pkt.pts, in_stream->time_base, out_stream->time_base, (AVRounding)(AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX));
        pkt.dts = av_rescale_q_rnd(pkt.dts, in_stream->time_base, out_stream->time_base, (AVRounding)(AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX));
        pkt.duration = av_rescale_q(pkt.duration, in_stream->time_base, out_stream->time_base);
        pkt.pos = -1;
        //Print to Screen
        if(pkt.stream_index==videoindex){
            printf("Send %8d video frames to output URL\n",frame_index);
            frame_index++;
        }
        //ret = av_write_frame(ofmt_ctx, &pkt);
        ret = av_interleaved_write_frame(ofmt_ctx, &pkt);
        if (ret < 0) {
            printf( "Error muxing packet\n");
            break;
        }

        av_free_packet(&pkt);
    }
    //寫檔案尾（Write file trailer）
    av_write_trailer(ofmt_ctx);
end:
    avformat_close_input(&ifmt_ctx);
    /* close output */
    if (ofmt_ctx && !(ofmt->flags & AVFMT_NOFILE))
        avio_close(ofmt_ctx->pb);
    avformat_free_context(ofmt_ctx);
    if (ret < 0 && ret != AVERROR_EOF) {
        printf( "Error occurred.\n");
        return -1;
    }
    return 0;
}

1. 用VLC播放rtmp://阿里雲伺服器公網ip/live/livestream