//?tutorial01.c
//?Code?based?on?a?tutorial?by?Martin?Bohme?（boehme@inb.uni-luebeckREMOVETHIS.de）
//?Tested?on?Gentoo?CVS?version?5/01/07?compiled?with?GCC?4.1.1

//?A?small?sample?program?that?shows?how?to?use?libavformat?and?libavcodec?to
//?read?video?from?a?file.
//
//?Use
//
//?gcc?-o?tutorial01?tutorial01.c?-lavutil?-lavformat?-lavcodec?-lz
//
//?to?build?（assuming?libavformat?and?libavcodec?are?correctly?installed
//?your?system）.
//
//?Run?using
//
//?tutorial01?myvideofile.mpg
//
//?to?write?the?first?five?frames?from?“myvideofile.mpg“?to?disk?in?PPM
//?format.

//#include?
#include?

extern?“C“{
#include?
#include?
#include?
#include?“jpeglib.h“?//?for?jpeglib
};

//實現視頻幀的jpeg壓縮
void?saveAsJpeg（AVframe?*pframeRGB?int?width?int?height?int?framenum）
{
	char?fname[128];
	//?AVPicture?my_pic?;
	struct?jpeg_compress_struct?cinfo;
	struct?jpeg_error_mgr?jerr;
	JSAMPROW?row_pointer[1];
	int?row_stride;
	uint8_t?*buffer;
	FILE?*fp?=?NULL;

	buffer?=?pframeRGB->data[0];

	int?size?=?sizeof（buffer）;

	cinfo.err?=?jpeg_std_error（&jerr）;
	jpeg_create_compress（&cinfo）;

	//_snprintf（fname?sizeof（fname）?“frames%d.jpg“?framenum）;
	sprintf（fname?“frames%d.jpg“?framenum）;
	fp?=?fopen（fname?“wb“）;

	if?（fp?==?NULL）
		return;

	jpeg_stdio_dest（&cinfo?fp）;

	cinfo.image_width?=?width;
	cinfo.image_height?=?height;
	cinfo.input_components?=?3;
	cinfo.in_color_space?=?JCS_RGB;

	jpeg_set_defaults（&cinfo）;

	jpeg_set_quality（&cinfo?80?true）;

	jpeg_start_compress（&cinfo?TRUE）;

	row_stride?=?width?*?3;

	while?（cinfo.next_scanline?	{
		/*?jpeg_write_scanlines?expects?an?array?of?pointers?to?scanlines.?
		*?Here?the?array?is?only?one?element?long?but?you?could?pass?
		*?more?than?one?scanline?at?a?time?if?that‘s?more?convenient.?
		*/?
		row_pointer[0]?=?&buffer[cinfo.next_scanline?*?row_stride];
		jpeg_write_scanlines（&cinfo?row_pointer?1）;
	}

	jpeg_finish_compress（&cinfo）;
	fclose（fp）;
	jpeg_destroy_compress（&cinfo）;
	printf（“compress?%d?frame?finished!\n“framenum）?;
	return?;

}

bool?saveAsBitmap（AVframe?*pframeRGB?int?width?int?height?int?iframe）
{
	FILE?*pFile?=?NULL;
	BITMAPFILEHEADER?bmpheader;?
	BITMAPINFO?bmpinfo;?

	uint8_t?*buffer?=?pframeRGB->data[0];?//?got?the?raw?RGB24?data

	char?fileName[32];
	int?bpp?=?24;

	//?open?file
	sprintf（fileName?“frame%d.bmp“?iframe）;
	pFile?=?fopen（fileName?“wb“）;
	if?（!pFile）
		return?false;
	
	bmpheader.bfType?=?（‘M‘?<<8）|‘B‘;?
	bmpheader.bfReserved1?=?0;?
	bmpheader.bfReserved2?=?0;?
	bmpheader.bfOffBits?=?sizeof（BITMAPFILEHEADER）?+?sizeof（BITMAPINFOHEADER）;?
	bmpheader.bfSize?=?bmpheader.bfOffBits?+?width*height*bpp/8;?

	bmpinfo.bmiHeader.biSize?=?sizeof（BITMAPINFOHEADER）;?
	bmpinfo.bmiHeader.biWidth?=?width;?
	bmpinfo.bmiHeader.biHeight?=?-height;?//reverse?the?image
	bmpinfo.bmiHeader.biPlanes?=?1;?
	bmpinfo.bmiHeader.b

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

?????文件????7770624??2012-03-08?10:55??tutorial01\Debug\avcodec-53.dll

?????文件?????240640??2012-03-08?10:55??tutorial01\Debug\avfilter-2.dll

?????文件????1099264??2012-03-08?10:55??tutorial01\Debug\avformat-53.dll

?????文件?????151040??2012-03-08?10:55??tutorial01\Debug\avutil-51.dll

?????文件?????312320??2012-03-08?10:55??tutorial01\Debug\swscale-2.dll

?????文件?????434056??2012-03-22?16:34??tutorial01\Debug\tutorial01.ilk

?????文件??????56692??2012-03-08?10:55??tutorial01\ffmpeg0.10-for-win（bad）\bin\avcodec.lib

?????文件???????2484??2012-03-08?10:55??tutorial01\ffmpeg0.10-for-win（bad）\bin\avdevice.lib

?????文件??????35348??2012-03-08?10:55??tutorial01\ffmpeg0.10-for-win（bad）\bin\avfilter.lib

?????文件??????46224??2012-03-08?10:55??tutorial01\ffmpeg0.10-for-win（bad）\bin\avformat.lib

?????文件??????41838??2012-03-08?10:55??tutorial01\ffmpeg0.10-for-win（bad）\bin\avutil.lib

?????文件?????580418??2012-03-22?15:44??tutorial01\ffmpeg0.10-for-win（bad）\bin\libjpeg.lib

?????文件???????3804??2012-03-08?10:55??tutorial01\ffmpeg0.10-for-win（bad）\bin\swresample.lib

?????文件??????44436??2012-03-08?10:55??tutorial01\ffmpeg0.10-for-win（bad）\bin\swscale.lib

?????文件?????????91??2012-03-08?11:33??tutorial01\ffmpeg0.10-for-win（bad）\include\inttypes.h

?????文件???????1333??1997-10-19?03:41??tutorial01\ffmpeg0.10-for-win（bad）\include\jconfig.h

?????文件??????13936??1997-10-19?02:59??tutorial01\ffmpeg0.10-for-win（bad）\include\jerror.h

?????文件???????3250??1994-04-02?04:29??tutorial01\ffmpeg0.10-for-win（bad）\include\jinclude.h

?????文件??????12553??2012-03-22?15:47??tutorial01\ffmpeg0.10-for-win（bad）\include\jmorecfg.h

?????文件??????46205??1998-02-22?03:48??tutorial01\ffmpeg0.10-for-win（bad）\include\jpeglib.h

?????文件?????163547??2012-03-08?10:56??tutorial01\ffmpeg0.10-for-win（bad）\include\libavcodec\avcodec.h

?????文件???????2913??2012-03-08?10:56??tutorial01\ffmpeg0.10-for-win（bad）\include\libavcodec\avfft.h

?????文件???????1931??2012-03-08?10:56??tutorial01\ffmpeg0.10-for-win（bad）\include\libavcodec\dxva2.h

?????文件???????1027??2012-03-08?10:56??tutorial01\ffmpeg0.10-for-win（bad）\include\libavcodec\opt.h

?????文件???????3895??2012-03-08?10:56??tutorial01\ffmpeg0.10-for-win（bad）\include\libavcodec\vaapi.h

?????文件???????4085??2012-03-08?10:56??tutorial01\ffmpeg0.10-for-win（bad）\include\libavcodec\vda.h

?????文件???????2848??2012-03-08?10:56??tutorial01\ffmpeg0.10-for-win（bad）\include\libavcodec\vdpau.h

?????文件???????4563??2012-03-08?10:56??tutorial01\ffmpeg0.10-for-win（bad）\include\libavcodec\version.h

?????文件???????5796??2012-03-08?10:56??tutorial01\ffmpeg0.10-for-win（bad）\include\libavcodec\xvmc.h

?????文件???????2786??2012-03-08?10:56??tutorial01\ffmpeg0.10-for-win（bad）\include\libavdevice\avdevice.h

............此處省略76個文件信息