/**
?*?最簡(jiǎn)單的基于FFmpeg的視頻編碼器
?*?Simplest?FFmpeg?Video?Encoder
?*?
?*?雷霄驊?Lei?Xiaohua
?*?leixiaohua1020@126.com
?*?中國(guó)傳媒大學(xué)/數(shù)字電視技術(shù)
?*?Communication?University?of?China?/?Digital?TV?Technology
?*?http://blog.csdn.net/leixiaohua1020
?*?
?*?本程序?qū)崿F(xiàn)了YUV像素?cái)?shù)據(jù)編碼為視頻碼流（H264，MPEG2，VP8等等）。
?*?是最簡(jiǎn)單的FFmpeg視頻編碼方面的教程。
?*?通過(guò)學(xué)習(xí)本例子可以了解FFmpeg的編碼流程。
?*?This?software?encode?YUV420P?data?to?H.264?bitstream.
?*?It‘s?the?simplest?video?encoding?software?based?on?FFmpeg.?
?*?Suitable?for?beginner?of?FFmpeg?
?*/

#include?

#define?__STDC_CONSTANT_MACROS

#ifdef?_WIN32
//Windows
extern?“C“
{
#include?“l(fā)ibavutil/opt.h“
#include?“l(fā)ibavcodec/avcodec.h“
#include?“l(fā)ibavformat/avformat.h“
};
#else
//Linux...
#ifdef?__cplusplus
extern?“C“
{
#endif
#include?
#include?
#include?
#ifdef?__cplusplus
};
#endif
#endif


int?flush_encoder（AVFormatContext?*fmt_ctxunsigned?int?stream_index）{
	int?ret;
	int?got_frame;
	AVPacket?enc_pkt;
	if?（!（fmt_ctx->streams[stream_index]->codec->codec->capabilities?&
		CODEC_CAP_DELAY））
		return?0;
	while?（1）?{
		enc_pkt.data?=?NULL;
		enc_pkt.size?=?0;
		av_init_packet（&enc_pkt）;
		ret?=?avcodec_encode_video2?（fmt_ctx->streams[stream_index]->codec?&enc_pkt
			NULL?&got_frame）;
		av_frame_free（NULL）;
		if?（ret?			break;
		if?（!got_frame）{
			ret=0;
			break;
		}
		printf（“Flush?Encoder:?Succeed?to?encode?1?frame!\tsize:%5d\n“enc_pkt.size）;
		/*?mux?encoded?frame?*/
		ret?=?av_write_frame（fmt_ctx?&enc_pkt）;
		if?（ret?			break;
	}
	return?ret;
}

int?main（int?argc?char*?argv[]）
{
	AVFormatContext*?pFormatCtx;
	AVOutputFormat*?fmt;
	AVStream*?video_st;
	AVCodecContext*?pCodecCtx;
	AVCodec*?pCodec;
	AVPacket?pkt;
	uint8_t*?picture_buf;
	AVframe*?pframe;
	int?picture_size;
	int?y_size;
	int?framecnt=0;
	//FILE?*in_file?=?fopen（“src01_480x272.yuv“?“rb“）;	//Input?raw?YUV?data?
	FILE?*in_file?=?fopen（“../ds_480x272.yuv“?“rb“）;???//Input?raw?YUV?data
	int?in_w=480in_h=272;??????????????????????????????//Input?data‘s?width?and?height
	int?framenum=100;???????????????????????????????????//frames?to?encode
	//const?char*?out_file?=?“src01.h264“;??????????????//Output?Filepath?
	//const?char*?out_file?=?“src01.ts“;
	//const?char*?out_file?=?“src01.hevc“;
	const?char*?out_file?=?“ds.h264“;

	av_register_all（）;
	//Method1.
	pFormatCtx?=?avformat_alloc_context（）;
	//Guess?Format
	fmt?=?av_guess_format（NULL?out_file?NULL）;
	pFormatCtx->oformat?=?fmt;
	
	//Method?2.
	//avformat_alloc_output_context2（&pFormatCtx?NULL?NULL?out_file）;
	//fmt?=?pFormatCtx->oformat;


	//Open?output?URL
	if?（avio_open（&pFormatCtx->pbout_file?AVIO_FLAG_READ_WRITE）?		printf（“Failed?to?open?output?file!?\n“）;
		return?-1;
	}

	video_st?=?avformat_new_stream（pFormatCtx?0）;
	video_st->time_base.num?=?1;?
	video_st->time_base.den?=?25;??

	if?（video_st==NULL）{
		return?-1;
	}
	//Par

?屬性????????????大小?????日期????時(shí)間???名稱(chēng)
-----------?---------??----------?-----??----
?????文件??????????28??2015-02-12?17:38??.gitignore
?????文件????19584000??2015-02-12?17:38??ds_480x272.yuv
?????文件????????1053??2015-02-12?17:38??readme.txt
?????文件???????67142??2015-02-12?17:38??simplest_ffmpeg_video_encoder.jpg
?????文件????????1469??2015-02-12?17:38??simplest_ffmpeg_video_encoder.sln
?????文件???????22528??2015-02-12?17:38??simplest_ffmpeg_video_encoder.suo
?????目錄???????????0??2015-02-12?17:38??simplest_ffmpeg_video_encoder\
?????文件??????????61??2015-02-12?17:38??simplest_ffmpeg_video_encoder\.gitignore
?????文件????19294208??2015-02-12?17:38??simplest_ffmpeg_video_encoder\avcodec-56.dll
?????文件?????1341440??2015-02-12?17:38??simplest_ffmpeg_video_encoder\avdevice-56.dll
?????文件?????2201088??2015-02-12?17:38??simplest_ffmpeg_video_encoder\avfilter-5.dll
?????文件?????5721088??2015-02-12?17:38??simplest_ffmpeg_video_encoder\avformat-56.dll
?????文件??????424960??2015-02-12?17:38??simplest_ffmpeg_video_encoder\avutil-54.dll
?????文件?????????632??2015-02-12?17:38??simplest_ffmpeg_video_encoder\compile_cl.bat
?????文件?????????439??2015-02-12?17:38??simplest_ffmpeg_video_encoder\compile_gcc.sh
?????文件?????????462??2015-02-12?17:38??simplest_ffmpeg_video_encoder\compile_mingw.sh
?????文件??????201505??2015-02-12?17:38??simplest_ffmpeg_video_encoder\ds.h264
?????目錄???????????0??2015-02-12?17:38??simplest_ffmpeg_video_encoder\include\
?????文件????????7976??2015-02-12?17:38??simplest_ffmpeg_video_encoder\include\_mingw.h
?????文件????????5721??2015-02-12?17:38??simplest_ffmpeg_video_encoder\include\inttypes.h
?????目錄???????????0??2015-02-12?17:38??simplest_ffmpeg_video_encoder\include\libavcodec\
?????文件??????177529??2015-02-12?17:38??simplest_ffmpeg_video_encoder\include\libavcodec\avcodec.h
?????文件????????3111??2015-02-12?17:38??simplest_ffmpeg_video_encoder\include\libavcodec\avfft.h
?????文件????????3659??2015-02-12?17:38??simplest_ffmpeg_video_encoder\include\libavcodec\dv_profile.h
?????文件????????2358??2015-02-12?17:38??simplest_ffmpeg_video_encoder\include\libavcodec\dxva2.h
?????文件???????10623??2015-02-12?17:38??simplest_ffmpeg_video_encoder\include\libavcodec\old_codec_ids.h
?????文件????????4007??2015-02-12?17:38??simplest_ffmpeg_video_encoder\include\libavcodec\vaapi.h
?????文件????????5437??2015-02-12?17:38??simplest_ffmpeg_video_encoder\include\libavcodec\vda.h
?????文件????????6200??2015-02-12?17:38??simplest_ffmpeg_video_encoder\include\libavcodec\vdpau.h
?????文件????????6035??2015-02-12?17:38??simplest_ffmpeg_video_encoder\include\libavcodec\version.h
?????文件????????6062??2015-02-12?17:38??simplest_ffmpeg_video_encoder\include\libavcodec\xvmc.h
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