/**
?*?最簡單的基于FFmpeg的收流器（接收RTMP）
?*?Simplest?FFmpeg?Receiver?（Receive?RTMP）
?*?
?*?雷霄驊?Lei?Xiaohua
?*?leixiaohua1020@126.com
?*?中國傳媒大學/數字電視技術
?*?Communication?University?of?China?/?Digital?TV?Technology
?*?http://blog.csdn.net/leixiaohua1020
?*?
?*?本例子將流媒體數據（以RTMP為例）保存成本地文件。
?*?是使用FFmpeg進行流媒體接收最簡單的教程。
?*
?*?This?example?saves?streaming?media?data?（Use?RTMP?as?example）
?*?as?a?local?file.
?*?It‘s?the?simplest?FFmpeg?stream?receiver.
?*?
?*/

#include?

#define?__STDC_CONSTANT_MACROS

#ifdef?_WIN32
//Windows
extern?“C“
{
#include?“libavformat/avformat.h“
#include?“libavutil/mathematics.h“
#include?“libavutil/time.h“
};
#else
//Linux...
#ifdef?__cplusplus
extern?“C“
{
#endif
#include?
#include?
#include?
#ifdef?__cplusplus
};
#endif
#endif

//‘1‘:?Use?H.264?Bitstream?Filter?
#define?USE_H264BSF?0

int?main（int?argc?char*?argv[]）
{
	AVOutputFormat?*ofmt?=?NULL;
	//Input?AVFormatContext?and?Output?AVFormatContext
	AVFormatContext?*ifmt_ctx?=?NULL?*ofmt_ctx?=?NULL;
	AVPacket?pkt;
	const?char?*in_filename?*out_filename;
	int?ret?i;
	int?videoindex=-1;
	int?frame_index=0;
	in_filename??=?“rtmp://live.hkstv.hk.lxdns.com/live/hks“;
	//in_filename??=?“rtp://233.233.233.233:6666“;
	//out_filename?=?“receive.ts“;
	//out_filename?=?“receive.mkv“;
	out_filename?=?“receive.flv“;

	av_register_all（）;
	//Network
	avformat_network_init（）;
	//Input
	if?（（ret?=?avformat_open_input（&ifmt_ctx?in_filename?0?0））?		printf（?“Could?not?open?input?file.“）;
		goto?end;
	}
	if?（（ret?=?avformat_find_stream_info（ifmt_ctx?0））?		printf（?“Failed?to?retrieve?input?stream?information“）;
		goto?end;
	}

	for（i=0;?inb_streams;?i++）?
		if（ifmt_ctx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO）{
			videoindex=i;
			break;
		}

	av_dump_format（ifmt_ctx?0?in_filename?0）;

	//Output
	avformat_alloc_output_context2（&ofmt_ctx?NULL?NULL?out_filename）;?//RTMP

	if?（!ofmt_ctx）?{
		printf（?“Could?not?create?output?context\n“）;
		ret?=?AVERROR_UNKNOWN;
		goto?end;
	}
	ofmt?=?ofmt_ctx->oformat;
	for?（i?=?0;?i?nb_streams;?i++）?{
		//Create?output?AVStream?according?to?input?AVStream
		AVStream?*in_stream?=?ifmt_ctx->streams[i];
		AVStream?*out_stream?=?avformat_new_stream（ofmt_ctx?in_stream->codec->codec）;
		if?（!out_stream）?{
			printf（?“Failed?allocating?output?stream\n“）;
			ret?=?AVERROR_UNKNOWN;
			goto?end;
		}
		//Copy?the?settings?of?AVCodecContext
		ret?=?avcodec_copy_context（out_stream->codec?in_stream->codec）;
		if?（ret?			printf（?“Failed?to?copy?context?from?input?to?output?stream?codec?context\n“）;
			goto?end;
		}
		out_stream->codec->codec_tag?=?0;
		if?（ofmt_ctx->oformat->flags?&?AVFMT_GLOBALHEADER）
			out_stream->codec->flags?|=?CODEC_FLAG_GLOBAL_HEADER;
	}
	//Dump?Format------------------
	av_dump_format（ofmt_ctx?0?out_filename?1

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件??????????34??2015-07-14?11:17??.gitignore
?????文件?????????907??2015-07-14?11:17??ReadMe.txt
?????目錄???????????0??2015-07-14?11:17??simplest_ffmpeg_receiver\
?????文件??????????75??2015-07-14?11:17??simplest_ffmpeg_receiver\.gitignore
?????文件?????????539??2015-07-14?11:17??simplest_ffmpeg_receiver\ReadMe.txt
?????文件????18936320??2015-07-14?11:17??simplest_ffmpeg_receiver\avcodec-55.dll
?????文件?????1340928??2015-07-14?11:17??simplest_ffmpeg_receiver\avdevice-55.dll
?????文件?????2034688??2015-07-14?11:17??simplest_ffmpeg_receiver\avfilter-4.dll
?????文件?????5342720??2015-07-14?11:17??simplest_ffmpeg_receiver\avformat-55.dll
?????文件??????418304??2015-07-14?11:17??simplest_ffmpeg_receiver\avutil-52.dll
?????文件?????????647??2015-07-14?11:17??simplest_ffmpeg_receiver\compile_cl.bat
?????文件?????????460??2015-07-14?11:17??simplest_ffmpeg_receiver\compile_gcc.sh
?????文件?????????467??2015-07-14?11:17??simplest_ffmpeg_receiver\compile_mingw.sh
?????目錄???????????0??2015-07-14?11:17??simplest_ffmpeg_receiver\include\
?????文件????????8264??2015-07-14?11:17??simplest_ffmpeg_receiver\include\_mingw.h
?????文件????????6002??2015-07-14?11:17??simplest_ffmpeg_receiver\include\inttypes.h
?????目錄???????????0??2015-07-14?11:17??simplest_ffmpeg_receiver\include\libavcodec\
?????文件??????180728??2015-07-14?11:17??simplest_ffmpeg_receiver\include\libavcodec\avcodec.h
?????文件????????3229??2015-07-14?11:17??simplest_ffmpeg_receiver\include\libavcodec\avfft.h
?????文件????????2488??2015-07-14?11:17??simplest_ffmpeg_receiver\include\libavcodec\dxva2.h
?????文件???????11053??2015-07-14?11:17??simplest_ffmpeg_receiver\include\libavcodec\old_codec_ids.h
?????文件????????4180??2015-07-14?11:17??simplest_ffmpeg_receiver\include\libavcodec\vaapi.h
?????文件????????4262??2015-07-14?11:17??simplest_ffmpeg_receiver\include\libavcodec\vda.h
?????文件????????6415??2015-07-14?11:17??simplest_ffmpeg_receiver\include\libavcodec\vdpau.h
?????文件????????5759??2015-07-14?11:17??simplest_ffmpeg_receiver\include\libavcodec\version.h
?????文件????????6232??2015-07-14?11:17??simplest_ffmpeg_receiver\include\libavcodec\xvmc.h
?????目錄???????????0??2015-07-14?11:17??simplest_ffmpeg_receiver\include\libavdevice\
?????文件???????17129??2015-07-14?11:17??simplest_ffmpeg_receiver\include\libavdevice\avdevice.h
?????文件????????1911??2015-07-14?11:17??simplest_ffmpeg_receiver\include\libavdevice\version.h
?????目錄???????????0??2015-07-14?11:17??simplest_ffmpeg_receiver\include\libavfilter\
?????文件????????3412??2015-07-14?11:17??simplest_ffmpeg_receiver\include\libavfilter\asrc_abuffer.h
............此處省略221個文件信息