接收使用FFMPEG库RTSP流 [英] Receiving RTSP stream using FFMPEG library
问题描述
我对使用RTSP我的局域网视频流的IPCamera的。我已经能够捕捉并成功使用ffplay命令显示:
ffplay的rtsp://管理员:123456@192.168.2.50:7070
(身份验证)
所以我想用的ffmpeg
库,实现了使用编程的C / C ++一样。我想这一定是可行的。
因此,让我那句两个简单的问题:
-
我如何接收流使用FFMPEG库中的C / C ++程序? (只是提供一些URL /教程,如谷歌没有帮助)
-
如何显示接收到的视频? (同样在这里,一些好的网址访问我)。
有关RTSP流为我工作(接收帧后,我将结果保存到一个PPM文件)以下内容:
的#include<&stdio.h中GT;
#包括LT&;&stdlib.h中GT;
#包括LT&;&iostream的GT;
#包括LT&;&的fstream GT;
#包括LT&;&sstream GT;为externC
{
#包括LT&; AV codec.h>
#包括LT&;&avformat.h GT;
#包括LT&;&avio.h GT;
#包括LT&;&swscale.h GT;
}无效log_callback(无效* PTR,INT级,为const char * FMT,va_list的vargs)
{
静态字符信息[8192];
为const char *模块= NULL; 如果(PTR)
{
AVClass * AVC = *(AVClass **)PTR;
模块= avc-> ITEM_NAME(PTR);
}
vsnprintf_s(消息的sizeof(消息),格式化,vargs); 性病::法院LT&;< 日志:<<消息<<的std :: ENDL;
}
INT主(INT ARGC,字符** argv的){ SwsContext * img_convert_ctx;
AVFormatContext *上下文= avformat_alloc_context();
AV codecContext * ccontext = AV codec_alloc_context();
INT video_stream_index; av_register_all();
avformat_network_init();
// av_log_set_callback(安培; log_callback); //打开RTSP
如果(avformat_open_input(安培;上下文中,!RTSP://134.169.178.187:8554 / h264.3gp,NULL,NULL)= 0){
返回EXIT_FAILURE;
} 如果(avformat_find_stream_info(上下文,NULL)℃,){
返回EXIT_FAILURE;
} //搜索视频流
的for(int i = 0; I<&上下文GT; nb_streams;我++){
如果(上下文>流[I] - > codeC-> codeC_TYPE == AVMEDIA_TYPE_VIDEO)
video_stream_index = I;
} AVPacket包;
av_init_packet(安培;包); //打开输出文件。
// AVOutputFormat * FMT = av_guess_format(NULL,test2.mp4,NULL);
AVFormatContext * OC = avformat_alloc_context();
// OC-GT&; oformat = FMT;
// avio_open2(安培; OC-> PBtest.mp4,AVIO_FLAG_WRITE,NULL,NULL); AVStream *流= NULL;
INT CNT = 0;
//从流开始读取数据包,并将其写入到文件
av_read_play(上下文); //播放RTSP AV codeC * codeC = NULL;
codeC = AV codec_find_de codeR(codeC_ID_H264);
如果(!codeC)出口(1); AV codec_get_context_defaults3(ccontext,codeC);
AV codec_copy_context(ccontext,上下文>流[video_stream_index] - > codeC);
的std :: ofstream的MYFILE; 如果(AV codec_open(ccontext,codeC)℃下)出口(1); img_convert_ctx = sws_getContext(ccontext->宽度,ccontext->的高度,ccontext-> pix_fmt,ccontext->宽度,ccontext->的高度,
PIX_FMT_RGB24,SWS_BICUBIC,NULL,NULL,NULL); INT大小= avpicture_get_size(PIX_FMT_YUV420P,ccontext->宽度,ccontext->高度);
uint8_t有* picture_buf =(uint8_t有*)(av_malloc(大小));
AVFrame * PIC = AV codec_alloc_frame();
AVFrame * picrgb = AV codec_alloc_frame();
INT尺寸2 = avpicture_get_size(PIX_FMT_RGB24,ccontext->宽度,ccontext->高度);
uint8_t有* picture_buf2 =(uint8_t有*)(av_malloc(size2个));
avpicture_fill((AVPicture *)图片,picture_buf,PIX_FMT_YUV420P,ccontext->宽度,ccontext->高度);
avpicture_fill((AVPicture *)picrgb,picture_buf2,PIX_FMT_RGB24,ccontext->宽度,ccontext->高度); 而(av_read_frame(上下文中,放大器;分组)GT; = 0&放大器;&放大器; CNT&下; 1000)
{//读取100帧 性病::法院LT&;< 1帧:<< CNT<<的std :: ENDL;
如果(packet.stream_index == video_stream_index){//分组是视频
性病::法院LT&;< 2是视频<<的std :: ENDL;
如果(流== NULL)
{//创建文件流
性病::法院LT&;< 3创建流<<的std :: ENDL;
流= avformat_new_stream(OC,上下文>流[video_stream_index] - > codeC-> codeC);
AV codec_copy_context(与于流GT; codeC,上下文>流[video_stream_index] - > codeC);
- 于流GT; sample_aspect_ratio =上下文>流[video_stream_index] - > codeC-> sample_aspect_ratio;
}
INT检查= 0;
packet.stream_index =&于流GT; ID;
性病::法院LT&;< 4解码<<的std :: ENDL;
INT结果= AV codec_de code_video2(ccontext,PIC,和放大器;检查,&安培;包);
性病::法院LT&;< 字节德codeD<<结果<< 检查<<检查<<的std :: ENDL;
如果(CNT大于100)// CNT&下; 0)
{
sws_scale(img_convert_ctx,pic->的数据,pic-> LINESIZE,0,ccontext->的高度,picrgb->的数据,picrgb-> LINESIZE);
的std :: stringstream的名称;
命名<< 测试<< CNT<< .ppm;
myfile.open(name.str());
MYFILE<< P3&所述;&下; ccontext->宽度LT;< << ccontext->高度<< 255 \\ n;
对于(INT Y = 0; Y< ccontext->高度; Y ++)
{
对于(INT X = 0; X< ccontext->宽* 3; X ++)
MYFILE<< (中间体)(picrgb->数据[0] + Y * picrgb-> LINESIZE [0])[X]&下;&下; ;
}
myfile.close();
}
CNT ++;
}
av_free_packet(安培;包);
av_init_packet(安培;包);
}
av_free(PIC);
av_free(picrgb);
av_free(picture_buf);
av_free(picture_buf2); av_read_pause(上下文);
avio_close(OC-GT&; PB);
avformat_free_context(OC); 回报(EXIT_SUCCESS);
}
I have an IPCamera on my LAN streaming video using RTSP. I have been able to capture and display it successfully using ffplay command:
ffplay rtsp://admin:123456@192.168.2.50:7070
(with authentication)
So I would like to achieve the same using programming in C/C++ using ffmpeg
library. I guess this must be possible.
So let me phrase two simple questions :
How do I receive the stream in a C/C++ program using FFMPEG library? (just provide some URL/tutorial, as google was not helpful)
How do I display the received video? (same here, some good URL to direct me).
For rtsp streams the following is working for me (after receiving frames i save the result to a ppm file):
#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <fstream>
#include <sstream>
extern "C"
{
#include <avcodec.h>
#include <avformat.h>
#include <avio.h>
#include <swscale.h>
}
void log_callback(void *ptr, int level, const char *fmt, va_list vargs)
{
static char message[8192];
const char *module = NULL;
if (ptr)
{
AVClass *avc = *(AVClass**) ptr;
module = avc->item_name(ptr);
}
vsnprintf_s(message, sizeof(message), fmt, vargs);
std::cout << "LOG: " << message << std::endl;
}
int main(int argc, char** argv) {
SwsContext *img_convert_ctx;
AVFormatContext* context = avformat_alloc_context();
AVCodecContext* ccontext = avcodec_alloc_context();
int video_stream_index;
av_register_all();
avformat_network_init();
//av_log_set_callback(&log_callback);
//open rtsp
if(avformat_open_input(&context, "rtsp://134.169.178.187:8554/h264.3gp",NULL,NULL) != 0){
return EXIT_FAILURE;
}
if(avformat_find_stream_info(context,NULL) < 0){
return EXIT_FAILURE;
}
//search video stream
for(int i =0;i<context->nb_streams;i++){
if(context->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
video_stream_index = i;
}
AVPacket packet;
av_init_packet(&packet);
//open output file
//AVOutputFormat* fmt = av_guess_format(NULL,"test2.mp4",NULL);
AVFormatContext* oc = avformat_alloc_context();
//oc->oformat = fmt;
//avio_open2(&oc->pb, "test.mp4", AVIO_FLAG_WRITE,NULL,NULL);
AVStream* stream=NULL;
int cnt = 0;
//start reading packets from stream and write them to file
av_read_play(context);//play RTSP
AVCodec *codec = NULL;
codec = avcodec_find_decoder(CODEC_ID_H264);
if (!codec) exit(1);
avcodec_get_context_defaults3(ccontext, codec);
avcodec_copy_context(ccontext,context->streams[video_stream_index]->codec);
std::ofstream myfile;
if (avcodec_open(ccontext, codec) < 0) exit(1);
img_convert_ctx = sws_getContext(ccontext->width, ccontext->height, ccontext->pix_fmt, ccontext->width, ccontext->height,
PIX_FMT_RGB24, SWS_BICUBIC, NULL, NULL, NULL);
int size = avpicture_get_size(PIX_FMT_YUV420P, ccontext->width, ccontext->height);
uint8_t* picture_buf = (uint8_t*)(av_malloc(size));
AVFrame* pic = avcodec_alloc_frame();
AVFrame* picrgb = avcodec_alloc_frame();
int size2 = avpicture_get_size(PIX_FMT_RGB24, ccontext->width, ccontext->height);
uint8_t* picture_buf2 = (uint8_t*)(av_malloc(size2));
avpicture_fill((AVPicture *) pic, picture_buf, PIX_FMT_YUV420P, ccontext->width, ccontext->height);
avpicture_fill((AVPicture *) picrgb, picture_buf2, PIX_FMT_RGB24, ccontext->width, ccontext->height);
while(av_read_frame(context,&packet)>=0 && cnt <1000)
{//read 100 frames
std::cout << "1 Frame: " << cnt << std::endl;
if(packet.stream_index == video_stream_index){//packet is video
std::cout << "2 Is Video" << std::endl;
if(stream == NULL)
{//create stream in file
std::cout << "3 create stream" << std::endl;
stream = avformat_new_stream(oc,context->streams[video_stream_index]->codec->codec);
avcodec_copy_context(stream->codec,context->streams[video_stream_index]->codec);
stream->sample_aspect_ratio = context->streams[video_stream_index]->codec->sample_aspect_ratio;
}
int check = 0;
packet.stream_index = stream->id;
std::cout << "4 decoding" << std::endl;
int result = avcodec_decode_video2(ccontext, pic, &check, &packet);
std::cout << "Bytes decoded " << result << " check " << check << std::endl;
if(cnt > 100)//cnt < 0)
{
sws_scale(img_convert_ctx, pic->data, pic->linesize, 0, ccontext->height, picrgb->data, picrgb->linesize);
std::stringstream name;
name << "test" << cnt << ".ppm";
myfile.open(name.str());
myfile << "P3 " << ccontext->width << " " << ccontext->height << " 255\n";
for(int y = 0; y < ccontext->height; y++)
{
for(int x = 0; x < ccontext->width * 3; x++)
myfile << (int)(picrgb->data[0] + y * picrgb->linesize[0])[x] << " ";
}
myfile.close();
}
cnt++;
}
av_free_packet(&packet);
av_init_packet(&packet);
}
av_free(pic);
av_free(picrgb);
av_free(picture_buf);
av_free(picture_buf2);
av_read_pause(context);
avio_close(oc->pb);
avformat_free_context(oc);
return (EXIT_SUCCESS);
}
这篇关于接收使用FFMPEG库RTSP流的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!