#include?
#include?
#include?
#include?

extern?“C“??
{???????????????????????????????
????#include?“libavformat/avformat.h“
????#include?“libavdevice/avdevice.h“
????#include?“libavcodec/avcodec.h“
}

#pragma?comment（lib?“avcodec.lib“）
#pragma?comment（lib?“avformat.lib“）
#pragma?comment（lib?“avutil.lib“）
#pragma?comment（lib?“swscale.lib“）
#pragma?comment（lib?“avdevice.lib“）
#pragma?comment（lib?“avfilter.lib“）

#undef?exit
/****************************************************************************************************************************************/
#define?STREAM_DURATION??5.0
#define?STREAM_frame_RATE??3.0
#define?STREAM_NB_frameS?（（int）（STREAM_DURATION*STREAM_frame_RATE））
#define?STREAM_PIX_FMT??PIX_FMT_YUV420P??????//????對于YUV420的結構

AVframe?*picture*tmp_picture;?????//AVframe為結構體，具體的定義在line?846?of?file?avcodec.h
uint8_t?*video_outbuf;?????????????//關于uint8_t的解釋???網址：http://blog.163.com/luokun_9/blog/static/20818832200761033146831/
int?frame_countvideo_outbuf_size;

main（int?argcchar?**argv）
{
????int?a;
	const?char?*input_file_name=“d:/aaa.m4v“;
	av_register_all（）;???//初始化的作用??注冊庫中所有可用的文件格式和編碼器??????Definition?at?line?597?of?file?avformat.h
	AVFormatContext?*ic;??????//為結構體，在其中定義了編解碼所需要的變量???Definition?at?line?401?of?file?avformat.h

/**
?*?Allocate?an?AVFormatContext.
?*?Can?be?freed?with?av_free（）?but?do?not?forget?to?free?everything?you
?*?explicitly?allocated?as?well!
*/
	ic=av_alloc_format_context（）;?//?Allocate?an?AVFormatContext.???Definition?at?line?646?of?file?avformat.h
	
	if（av_open_input_file（&icinput_file_nameNULL0NULL）!=0）???//open?input?file???Definition?at?line?637?of?file?avformat.h
	{
		printf（“can?not?open?the?file?%s\n“input_file_name）;
		exit（1）;
	}//檢驗是否成功的打開文件

	if（av_find_stream_info（ic）<0）???//Read?packets?of?a?media?file?to?get?stream?information.????Definition?at?line?660?of?file?avformat.h??
	{
		printf（“can?not?find?suitable?codec?parameters\n“）;
		exit（1）;
	}//檢驗視頻文件中，是否有數據流，并檢驗是否能成功取出
	dump_format（ic0input_file_name0）;??//列出輸入文件的相關流信息?????Definition?at?line?884?of?file?avformat.h???最后一位：判斷是否是輸出，若是輸出則該位為1
/******************************************************************************************************************************************/
	int?i;
	int?videoindex=-1;??????????
	int?audioindex=-1;

	for（i=0;inb_streams;i++）
	{
		if（ic->streams[i]->codec->codec_type==CODEC_TYPE_VIDEO）?????//指針數組stream[i]的類型是結構體AVStream??表示音頻和視頻的數據流???Definition?at?line?295?of?file?avformat.h?
			????????????????????????????????????????????????????????//codec的數據類型是結構體AVCodecContext???表示關于編解碼的標準位????Definition?at?line?800?of?file?avcodec.h
		{
			videoindex=i;
			printf（“video\n“）;
		}
		else?if（ic->streams[i]->codec->codec_type==CODEC_TYPE_AUDIO）
		{
			audioindex=i;
			printf（“audio\n“）;
		}
	}
/*******************************************************************************************

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????14929??2009-11-23?09:46??testsrc\23.cpp

?????文件???????3353??2009-11-23?09:46??testsrc\23.dsp

?????文件????????529??2009-11-23?09:47??testsrc\23.dsw

?????文件??????33792??2009-11-23?09:47??testsrc\23.ncb

?????文件??????48640??2009-11-23?09:47??testsrc\23.opt

?????文件????????726??2009-11-23?09:46??testsrc\23.plg

?????文件?????163961??2009-11-23?09:46??testsrc\Debug\23.exe

?????文件?????207968??2009-11-23?09:46??testsrc\Debug\23.ilk

?????文件??????23297??2009-11-23?09:46??testsrc\Debug\23.obj

?????文件?????235796??2009-11-23?09:46??testsrc\Debug\23.pch

?????文件?????369664??2009-11-23?09:46??testsrc\Debug\23.pdb

?????文件??????50176??2009-11-23?09:46??testsrc\Debug\vc60.idb

?????文件??????69632??2009-11-23?09:46??testsrc\Debug\vc60.pdb

?????文件?????163961??2009-11-23?09:46??bin-test\23.exe

?????文件????7276032??2008-04-12?22:21??bin-test\avcodec.dll

?????文件??????10752??2008-04-12?22:21??bin-test\avdevice.dll

?????文件??????14336??2008-04-12?22:21??bin-test\avfilter.dll

?????文件?????666624??2008-04-12?22:21??bin-test\avformat.dll

?????文件??????57344??2008-04-12?22:21??bin-test\avutil.dll

?????文件??????89273??2008-02-16?17:18??bin-test\pthreadGC2.dll

?????文件????1760356??2008-02-16?17:03??bin-test\SDL.dll

?????文件?????158208??2008-04-12?22:21??bin-test\swscale.dll

?????文件?????742220??2008-03-02?20:40??bin-test\xvidcore.dll

?????目錄??????????0??2009-11-23?09:52??testsrc\Debug

?????目錄??????????0??2009-11-23?09:52??testsrc

?????目錄??????????0??2009-11-23?09:54??bin-test

-----------?---------??----------?-----??----

?????????????12161569????????????????????26