可以通过SRS搭建流媒体服务器,并在其提供的SRS播放器播放,或者通过VLC播放器播放
#include <iostream>
using namespace std;
extern "C"
{
#include "libavformat/avformat.h"
#include "libavutil/time.h"
#include "libavutil/opt.h"
}
#pragma comment(lib, "avformat.lib")
#pragma comment(lib, "avutil.lib")
#pragma comment(lib, "avcodec.lib")
//AVDictionary *options = NULL;
char av_error[AV_ERROR_MAX_STRING_SIZE] = { 0 };
#define av_err2str(errnum) \
av_make_error_string(av_error, AV_ERROR_MAX_STRING_SIZE, errnum)
#define INFILE "t.flv"
#define RTMP "rtmp://..."
#define RTSP "rtsp://..."
int rtsp2rtmp(){
int ret = 0;
//封装上下文
AVFormatContext* ictx = nullptr;
AVFormatContext* octx = nullptr;
const char* iurl = RTSP;
const char* ourl = RTMP;
int64_t starttime;
av_register_all();
ret = avformat_network_init();
if (ret != 0)
{
cout << av_err2str(ret) << endl;
goto END;
}
//打开文件,解封文件头
ret = avformat_open_input(&ictx, iurl, nullptr, nullptr);
if (ret != 0)
{
cout << av_err2str(ret) << endl;
goto END;
}
cerr << "open file " << iurl << " success." << endl;
//获取音视频流信息,h264 flv
ret = avformat_find_stream_info(ictx, nullptr);
if (ret != 0)
{
cout << av_err2str(ret) << endl;
goto END;
}
//打印媒体信息
av_dump_format(ictx, 0, iurl, 0);
//////////////////////////////
//输出流
ret = avformat_alloc_output_context2(&octx, av_guess_format(nullptr, INFILE, nullptr), nullptr, ourl);
if (ret != 0)
{
cout << av_err2str(ret) << endl;
goto END;
}
cerr << "octx create success." << endl;
//配置输出流
for (int i = 0; i < ictx->nb_streams; ++i)
{
//创建流
AVStream* ostream = avformat_new_stream(octx, avcodec_find_encoder(ictx->streams[i]->codecpar->codec_id));
if (ostream == nullptr)
return -1;
//复制配置信息
ret = avcodec_parameters_copy(ostream->codecpar, ictx->streams[i]->codecpar);
if (ret != 0)
{
cout << av_err2str(ret) << endl;
goto END;
}
ostream->codecpar->codec_tag = 0;//标记不需要重新编解码
}
av_dump_format(octx, 0, ourl, 1);
//////////////////////////////
//推流
if (ret != 0)
{
cout << av_err2str(ret) << endl;
goto END;
}
ret = avio_open(&octx->pb, ourl, AVIO_FLAG_WRITE);
if (ret < 0)
{
cout << av_err2str(ret) << endl;
goto END;
}
AVCodecContext* c;
//写入头信息
ret = avformat_write_header(octx, nullptr);
if (ret < 0)
{
cout << av_err2str(ret) << endl;
goto END;
}
//推流每一帧数据
AVPacket pkt;
starttime = av_gettime();
while (av_read_frame(ictx, &pkt) == 0)
{
//计算转换pts dts
AVRational itime = ictx->streams[pkt.stream_index]->time_base;
AVRational otime = octx->streams[pkt.stream_index]->time_base;
pkt.pts = av_rescale_q_rnd(pkt.pts, itime, otime, (AVRounding)(AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX));
pkt.dts = av_rescale_q_rnd(pkt.dts, itime, otime, (AVRounding)(AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX));
pkt.duration = av_rescale_q_rnd(pkt.duration, itime, otime, (AVRounding)(AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX));
pkt.pos = -1;
ret = av_interleaved_write_frame(octx, &pkt);
av_packet_unref(&pkt);
if (ret < 0)
cout << av_err2str(ret) << endl;//不用退出
}
END:
if (ictx != nullptr)
avformat_close_input(&ictx);
if (octx != nullptr)
{
avio_close(octx->pb);
avformat_free_context(octx);
}
ret = avformat_network_deinit();
if (ret != 0)
cout << av_err2str(ret) << endl;
return 0;
}
int main()
{
// httRtmp();
rtsp2rtmp();
system("pause");
return 0;
}