音视频(二)之使用FFMpegSDK在C++代码中进行推流_c++ ffmpeg rtsp推流

作者：小舞很执着 | 2024-08-21 18:20:15
踩
c++ ffmpeg rtsp推流
                    
                        
                    
                    前言 
上一篇文章我们介绍了如何使用FFMpeg工具进行推流。但如果要在我们的代码工程中，实现推流。就要下载FFMpegSDK包，调用相关API，在我们自己的程序中实现推流。
 
FFMpegSDK下载 
下载动态库文件
 
选择这个下载
 
 
使用FFMpegSDK推流 
下载FFMpegSDK后，拷贝到我们的工程下
目录结构如下
   ├─ bin
  ├─ doc
  ├─ include
  		├─ libavcodec
  		├─ libavdevice
  		├─ libavfilter
  		├─ libavformat
  		├─ libavutil
  		├─ libpostproc
  		├─ libswresample
  		└─ libswscale
  ├─ lib
  		└─pkgconfig
  ├─ src
  		└─ main.cpp
  ├─ build_x64
  └─ CMakeLists.txt
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
 
bin，doc，include，lib目录都是FFMpegSDK包中的内容，直接拷贝过来
src 在这个目录下创建一个源文件 main.cpp，在代码中调用FFMpeg提供的API，实现推流，内容如下
 extern"C"{#include "libavformat/avformat.h"#include "libavcodec/avcodec.h"#include "libavutil/time.h"};#include <iostream>voidprintErr(int errNum);staticdoubler2d(AVRational r){return(r.num ==0|| r.den ==0)?0.0:(double)r.num /(double)r.den;}intmain(){//初始化网络库以及网络加密协议相关的库avformat_network_init();//打开文件, 解封文件头
      AVFormatContext *inContext =NULL;char*inFile ="001.mp4";int ret =avformat_open_input(&inContext, inFile,0,0);if(ret !=0){printErr(ret);return-1;}
  
      std::cout<<"avformat_open_input success"<<std::endl;//获取音视频流信息
      ret =avformat_find_stream_info(inContext,0);if(ret !=0){printErr(ret);return-1;}
  
      std::cout<<"avformat_find_stream_info success"<<std::endl;//打印信息av_dump_format(inContext,0, inFile,0);//输出流
      AVFormatContext *outContext;char*outFile ="rtmp://192.168.206.131:10088/live";
      ret =avformat_alloc_output_context2(&outContext,0,"flv", outFile);if(outContext ==0){printErr(ret);return-1;}
  
      std::cout<<"avformat_alloc_output_context2 success"<<std::endl;//配置输出流//遍历输入的AVStreamfor(int i =0; i < inContext->nb_streams; i++){
          AVStream *outStream =avformat_new_stream(outContext,NULL);if(outStream ==NULL){printErr(-1);return-1;}//复制配置信息
          ret =avcodec_parameters_copy(outStream->codecpar, inContext->streams[i]->codecpar);if(ret <0){printErr(ret);return-1;}
  
          outStream->codecpar->codec_tag =0;}//输出av_dump_format(outContext,0, outFile,1);//rtmp推流//打开io
      ret =avio_open(&outContext->pb, outFile, AVIO_FLAG_WRITE);if(ret !=0){printErr(ret);return-1;}
      std::cout<<"avio_open success"<<std::endl;//写入头信息
      ret =avformat_write_header(outContext,NULL);if(ret <0){printErr(ret);return-1;}
      std::cout<<"avformat_write_header success"<<std::endl;//推流帧数据
      AVPacket avpkt;longlong startTime =av_gettime();while(1){//读帧数据
          ret =av_read_frame(inContext,&avpkt);if(ret !=0){break;}
  
          std::cout << avpkt.pts << std::endl;//计算转换pts dts
          AVRational inTime = inContext->streams[avpkt.stream_index]->time_base;
          AVRational outTime = outContext->streams[avpkt.stream_index]->time_base;
          avpkt.pts =av_rescale_q_rnd(avpkt.pts, inTime, outTime,(AVRounding)(AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX));
          avpkt.dts =av_rescale_q_rnd(avpkt.dts, inTime, outTime,(AVRounding)(AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX));
          avpkt.duration =av_rescale_q_rnd(avpkt.duration, inTime, outTime,(AVRounding)(AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX));
          avpkt.pos =-1;//处理视频帧,控制推流速度if(inContext->streams[avpkt.stream_index]->codecpar->codec_type = AVMEDIA_TYPE_VIDEO){//时间基数
              AVRational tb = inContext->streams[avpkt.stream_index]->time_base;longlong nowTime =av_gettime()- startTime;longlong dtsTime = avpkt.dts *(1000*1000*r2d(tb));if(dtsTime > nowTime){av_usleep(dtsTime - nowTime);}}//发送数据
          ret =av_interleaved_write_frame(outContext,&avpkt);if(ret <0){printErr(ret);return-1;}//释放av_packet_unref(&avpkt);}system("pause");return0;}voidprintErr(int errNum){char errBuf[1024]={0};av_strerror(errNum, errBuf,sizeof(errBuf));system("pause");}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
 
CMakeLists.txt文件，实现编译，内容如下
   cmake_minimum_required (VERSION 3.5)
  project (FFmpegSDK)
  
  MESSAGE(STATUS "PROJECT_SOURCE_DIR"${PROJECT_SOURCE_DIR})
  SET(SRC_LISTS ${PROJECT_SOURCE_DIR}/src/main.cpp)# 配置工程需要的头文件目录 
  include_directories(${PROJECT_SOURCE_DIR}/include)
  
  
  IF(WIN32)
  	set(CMAKE_C_FLAGS_RELEASE "/MD /MP /Od /Zi /EHsc")
  ENDIF()
  
  
  set(PRO_AVCODEC_LIB ${PROJECT_SOURCE_DIR}/lib/avcodec.lib)
  set(PRO_AVFORMAT_LIB ${PROJECT_SOURCE_DIR}/lib/avformat.lib)
  set(PRO_AVUTIL_LIB ${PROJECT_SOURCE_DIR}/lib/avutil.lib)
  
  
  ADD_EXECUTABLE(FFmpegSDK ${SRC_LISTS})
  TARGET_LINK_LIBRARIES(FFmpegSDK ${PRO_AVCODEC_LIB}${PRO_AVFORMAT_LIB}${PRO_AVUTIL_LIB})
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
 
在build_x64目录下执行以下编译命令 
  cmake -G “Visual Studio 14 2015 Win64” …
cmake --build ./ --config Release
 
编译成功后，在build_x86\Release目录下就会生成可执行程序FFmpegSDK.exe
再把对应的库avcodec-60.dll、avformat-60.dll、avutil-58.dll、swresample-4.dll和要推送的视频文件001.mp4拷贝到build_x86\Release下。运行FFmpegSDK.exe就可以实现推流
可以使用VLC工具来播放推送流
 

                
声明：本文内容由网友自发贡献，不代表【wpsshop博客】立场，版权归原作者所有，本站不承担相应法律责任。如您发现有侵权的内容，请联系我们。转载请注明出处：https://www.wpsshop.cn/w/小舞很执着/article/detail/1012843