【FFmpeg】利用FFmpeg将rtsp 获取H264裸流和播放

利用ffmpeg的库获取rtsp协议的H264裸流

#include "stdafx.h"
 
#include <stdio.h>  
 
#define __STDC_CONSTANT_MACROS  
 
#ifdef _WIN32  
//Windows  
extern "C"
{
#include "libavcodec/avcodec.h"  
#include "libavformat/avformat.h"  
#include "libswscale/swscale.h"  
#include "SDL2/SDL.h"  
};
#else  
//Linux...  
#ifdef __cplusplus  
extern "C"
{
#endif  
#include <libavcodec/avcodec.h>  
#include <libavformat/avformat.h>  
#include <libswscale/swscale.h>  
#include <SDL2/SDL.h>  
#ifdef __cplusplus  
};
#endif  
#endif  
 
int main(int argc, char* argv[])
{
 
	AVFormatContext *pFormatCtx;
	int             i, videoindex;
	AVCodecContext  *pCodecCtx;
	AVCodec         *pCodec;
	AVFrame *pFrame, *pFrameYUV;
	uint8_t *out_buffer;
	AVPacket *packet;
	int ret, got_picture;
 
 
	struct SwsContext *img_convert_ctx;
	// 改成你自己的 URL
	char filepath[] = "rtsp://192.168.2.xx:8554/1"; 
	av_register_all();
	avformat_network_init();
	pFormatCtx = avformat_alloc_context();
 
	if (avformat_open_input(&pFormatCtx, filepath, NULL, NULL) != 0)打开网络流或文件流  
	{
		printf("Couldn't open input stream.\n");
		return -1;
	}
	if (avformat_find_stream_info(pFormatCtx, NULL)<0)
	{
		printf("Couldn't find stream information.\n");
		return -1;
	}
	videoindex = -1;
	for (i = 0; i<pFormatCtx->nb_streams; i++)
		if (pFormatCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
		{
			videoindex = i;
			break;
		}
	if (videoindex == -1)
	{
		printf("Didn't find a video stream.\n");
		return -1;
	}
	pCodecCtx = pFormatCtx->streams[videoindex]->codec;
	pCodec = avcodec_find_decoder(pCodecCtx->codec_id);
	if (pCodec == NULL)
	{
		printf("Codec not found.\n");
		return -1;
	}
	if (avcodec_open2(pCodecCtx, pCodec, NULL)<0)
	{
		printf("Could not open codec.\n");
		return -1;
	}
	pFrame = av_frame_alloc();
	pFrameYUV = av_frame_alloc();
	out_buffer = (uint8_t *)av_malloc(avpicture_get_size(PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height));
	avpicture_fill((AVPicture *)pFrameYUV, out_buffer, PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height);
 
	//Output Info---输出一些文件（RTSP）信息  
	printf("---------------- File Information ---------------\n");
	av_dump_format(pFormatCtx, 0, filepath, 0);
	printf("-------------------------------------------------\n");
 
	img_convert_ctx = sws_getContext(pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt,
		pCodecCtx->width, pCodecCtx->height, PIX_FMT_YUV420P, SWS_BICUBIC, NULL, NULL, NULL);
 
 
	packet = (AVPacket *)av_malloc(sizeof(AVPacket));
 
	FILE *fpSave;
	if ((fpSave = fopen("geth264.h264", "ab")) == NULL) //h264保存的文件名  
		return 0;
	for (;;)
	{
		//------------------------------  
		if (av_read_frame(pFormatCtx, packet) >= 0)
		{
			if (packet->stream_index == videoindex)
			{
				fwrite(packet->data, 1, packet->size, fpSave);//写数据到文件中  
			}
			av_free_packet(packet);
		}
	}
 
 
	//--------------  
	av_frame_free(&pFrameYUV);
	av_frame_free(&pFrame);
	avcodec_close(pCodecCtx);
	avformat_close_input(&pFormatCtx);
 
	return 0;
}

通过jmuxer播放保存的文件

Jmuxer

参考：blog.csdn.net/qq_29350001…