王纲网络流转发
作者：互联网
#ifndef PCH_H
#define PCH_H
extern "C"
{
#include "libavutil/opt.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/imgutils.h"
#include "libavutil/mathematics.h"
#include "libavutil/samplefmt.h"
#include "libavutil/time.h"
#include "libavutil/fifo.h"
#include "libavcodec/avcodec.h"
#include "libavformat/avformat.h"
#include "libavformat/avio.h"
//#include "libavfilter/avfiltergraph.h"
#include "libavfilter/avfilter.h"
#include "libavfilter/buffersink.h"
#include "libavfilter/buffersrc.h"
#include "libswscale/swscale.h"
#include "libswresample/swresample.h"
}
#endif
pch.h
// CGPushStream.cpp : 定义控制台应用程序的入口点。
/* Copyright [c] 2018-2028 By www.chungen90.com Allrights Reserved
This file give a simple example of how to push stream to
rtmp server. Any questions, you can join QQ group for help, QQ
Group number:127903734 or 766718184.
*/
#include "pch.h"
#include <string>
#include <memory>
#include <thread>
#include <iostream>
using namespace std;
AVFormatContext *inputContext = nullptr;
AVFormatContext *inputContext2 = nullptr;
AVFormatContext * outputContext;
int OpenInput(string inputUrl)
{
inputContext = avformat_alloc_context();
AVDictionary* options = nullptr;
av_dict_set(&options, "rtsp_transport", "tcp", 0);
int ret = avformat_open_input(&inputContext, inputUrl.c_str(), nullptr,&options);
if(ret < 0)
{
//av_strerror();
av_log(NULL, AV_LOG_ERROR, "Input file open input failed\n");
return ret;
}
ret = avformat_find_stream_info(inputContext,nullptr);
if(ret < 0)
{
av_log(NULL, AV_LOG_ERROR, "Find input file stream inform failed\n");
}
else
{
av_log(NULL, AV_LOG_FATAL, "Open input file %s success\n",inputUrl.c_str());
}
return ret;
}
int OpenInput2(string inputUrl)
{
inputContext2 = avformat_alloc_context();
AVDictionary* options = nullptr;
av_dict_set(&options, "rtsp_transport", "udp", 0);
int ret = avformat_open_input(&inputContext2, inputUrl.c_str(), nullptr,&options);
if(ret < 0)
{
//av_strerror();
av_log(NULL, AV_LOG_ERROR, "Input file open input failed\n");
return ret;
}
ret = avformat_find_stream_info(inputContext2,nullptr);
if(ret < 0)
{
av_log(NULL, AV_LOG_ERROR, "Find input file stream inform failed\n");
}
else
{
av_log(NULL, AV_LOG_FATAL, "Open input file %s success\n",inputUrl.c_str());
}
return ret;
}
shared_ptr<AVPacket> ReadPacketFromSource()
{
shared_ptr<AVPacket> packet(static_cast<AVPacket*>(av_malloc(sizeof(AVPacket))), [&](AVPacket *p) { av_packet_free(&p); av_freep(&p);});
av_init_packet(packet.get());
int ret = av_read_frame(inputContext, packet.get());
if(ret >= 0)
{
return packet;
}
else
{
return nullptr;
}
}
shared_ptr<AVPacket> ReadPacketFromSource2()
{
shared_ptr<AVPacket> packet(static_cast<AVPacket*>(av_malloc(sizeof(AVPacket))), [&](AVPacket *p) { av_packet_free(&p); av_freep(&p);});
av_init_packet(packet.get());
int ret = av_read_frame(inputContext2, packet.get());
if(ret >= 0)
{
return packet;
}
else
{
return nullptr;
}
}
void av_packet_rescale_ts(AVPacket *pkt, AVRational src_tb, AVRational dst_tb)
{
if (pkt->pts != AV_NOPTS_VALUE)
pkt->pts = av_rescale_q(pkt->pts, src_tb, dst_tb);
if (pkt->dts != AV_NOPTS_VALUE)
pkt->dts = av_rescale_q(pkt->dts, src_tb, dst_tb);
if (pkt->duration > 0)
pkt->duration = av_rescale_q(pkt->duration, src_tb, dst_tb);
}
int WritePacket(shared_ptr<AVPacket> packet)
{
auto inputStream = inputContext->streams[packet->stream_index];
auto outputStream = outputContext->streams[packet->stream_index];
av_packet_rescale_ts(packet.get(),inputStream->time_base,outputStream->time_base);
return av_interleaved_write_frame(outputContext, packet.get());
}
int OpenOutput(string outUrl)
{
int ret = avformat_alloc_output_context2(&outputContext, nullptr, "flv", outUrl.c_str());
if(ret < 0)
{
av_log(NULL, AV_LOG_ERROR, "open output context failed\n");
goto Error;
}
ret = avio_open2(&outputContext->pb, outUrl.c_str(), AVIO_FLAG_READ_WRITE,nullptr, nullptr);
if(ret < 0)
{
av_log(NULL, AV_LOG_ERROR, "open avio failed");
goto Error;
}
//AVCodec * picCodec;
for(int i = 0; i < inputContext->nb_streams; i++)
{
AVStream * stream = avformat_new_stream(outputContext, inputContext->streams[i]->codec->codec);
/*picCodec = avcodec_find_encoder(inputContext->streams[i]->codec->codec_id);
AVStream * stream = avformat_new_stream(outputContext, picCodec);*/
ret = avcodec_copy_context(stream->codec, inputContext->streams[i]->codec);
if(ret < 0)
{
av_log(NULL, AV_LOG_ERROR, "copy coddec context failed");
goto Error;
}
}
ret = avformat_write_header(outputContext, nullptr);
if(ret < 0)
{
av_log(NULL, AV_LOG_ERROR, "format write header failed");
goto Error;
}
av_log(NULL, AV_LOG_FATAL, " Open output file success %s\n",outUrl.c_str());
return ret ;
Error:
if(outputContext)
{
for(int i = 0; i < outputContext->nb_streams; i++)
{
avcodec_close(outputContext->streams[i]->codec);
}
avformat_close_input(&outputContext);
}
return ret ;
}
void Init()
{
av_register_all();
avfilter_register_all();
avformat_network_init();
av_log_set_level(AV_LOG_ERROR);
}
int main(int argc, char* argv[])
{
Init();
string input = "rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov";
string output = "rtmp://192.168.169.139:1935/live/stream10";
/*cout <<"输入 Input url "<<endl5
cin >> input;
std::cout << std::endl;
cout <<"输入 Output url "<<endl;
cin >> output;
std::cout << std::endl;*/
//input += " live=1";
//input2 += " live=1";
int ret = OpenInput(input);
//ret = OpenInput2(input2);
if(ret >= 0)
{
ret = OpenOutput(output);
}
if(ret <0) goto Error;
int64_t count = 0;
bool flag = false;
while(true)
{
shared_ptr<AVPacket> packet = nullptr;
packet = ReadPacketFromSource();
flag = false;
if(packet)
{
//packet->pts = packet->dts = 40 * count++;
//packet->data = nullptr;
//packet->buf->data = nullptr;
ret = WritePacket(packet);
// this_thread::sleep_for(std::chrono::seconds(5000));
if(ret >= 0 )
{
//count++;
cout<<"WritePacket Success!"<<endl;
}
else if(ret < 0)
{
cout<<"WritePacket failed! ret = " << ret<<endl;
}
}
}
Error:
while(true)
{
this_thread::sleep_for(chrono::seconds(100));
}
return 0;
}
标签：转发,nullptr,网络,packet,王纲,ret,AV,av,include 来源： https://www.cnblogs.com/zeliangzhang/p/15748206.html