#include?

extern?“C“{
#include?“libavcodec/avcodec.h“
#include?“libavformat/avformat.h“
#include?“libswscale/swscale.h“
}

void?saveframe（AVframe*?pframe?int?width?int?height?int?iframe）
{
	FILE?*pFile;
	char?szFilename[32];
	int?y;

	sprintf（szFilename?“frame%d.ppm“?iframe）;
	pFile?=?fopen（szFilename?“wb“）;
	if?（pFile?==?NULL）
		return;

	fprintf（pFile?“P6\n%d?%d\n255\n“?width?height）;

	for?（y?=?0;?y?		fwrite（pframe->data[0]?+?y*pframe->linesize[0]?1?width?*?3?pFile）;

	fclose（pFile）;
}
int?main（）
{
	AVFormatContext?*pFormatCtx;
	int?i?videoIndex;
	AVCodecContext?*pCodecCtx?=?NULL;
	AVCodec?*pCodec?=?NULL;
	
	AVPacket?packet;
	int?frameFinished;
	int?numBytes;
	uint8_t?*buffer;

	//char*?filename?=?“nihao.avi“;
	char*?filename?=?“cuc_ieschool.flv“;
	pFormatCtx?=?avformat_alloc_context（）;
	av_register_all（）;
	if?（avformat_open_input（&pFormatCtx?filename?NULL?0）?!=?0）
		return?-1;
	if?（avformat_find_stream_info（pFormatCtx?NULL）?		return?-1;
	av_dump_format（pFormatCtx?0?filename?0）;

	videoIndex?=?-1;
	for?（i?=?0;?i?nb_streams;?++i）{
		if?（pFormatCtx->streams[i]->codec->codec_type?==?AVMEDIA_TYPE_VIDEO）{
			videoIndex?=?i;
			break;
		}
	}
	if?（videoIndex?==?-1）
	{
		fprintf（stderr?“unsupport?codec\n“）;
		return?-1;
	}
	pCodecCtx?=?pFormatCtx->streams[videoIndex]->codec;
	pCodec?=?avcodec_find_decoder（pCodecCtx->codec_id）;
	if?（avcodec_open2（pCodecCtx?pCodec?NULL）?		return?-1;

	AVframe?*pframeRGB?*pframe;
	pframe?=?av_frame_alloc（）;
	pframeRGB?=?av_frame_alloc（）;
	if?（pframe?==?NULL）
		return?-1;

	numBytes?=?avpicture_get_size（PIX_FMT_RGB24?pCodecCtx->width?pCodecCtx->height）;
	buffer?=?（uint8_t?*）av_malloc（numBytes?*?sizeof（uint8_t））;

	avpicture_fill（（AVPicture*）pframeRGB?buffer?PIX_FMT_RGB24?pCodecCtx->width?pCodecCtx->height）;
	
	i?=?0;
	struct?SwsContext*?img_convert_ctx;
	img_convert_ctx?=?sws_getContext（pCodecCtx->width?pCodecCtx->height?pCodecCtx->pix_fmt
		pCodecCtx->width?pCodecCtx->height?PIX_FMT_RGB24?SWS_BICUBIC?NULL?NULL?NULL）;

	while?（av_read_frame（pFormatCtx?&packet）?>=?0）{
		if?（packet.stream_index?==?videoIndex）{
			avcodec_decode_video2（pCodecCtx?pframe?&frameFinished?&packet）;
			
			if?（frameFinished）
			{
				sws_scale（img_convert_ctx?pframe->data?pframe->linesize?0?pCodecCtx->height?
					pframeRGB->data?pframeRGB->linesize）;

				if?（++i?<=?100）
					saveframe（pframeRGB?pCodecCtx->width?pCodecCtx->height?i）;
			}
		}
		av_free_packet（&packet）;
	}

	av_free（buffer）;
	av_free（pframeRGB）;
	av_free（pframe）;
	avcodec_close（pCodecCtx）;
	return?0;
}

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

?????文件?????933615??2014-01-01?18:46??ffmpeg_get_ppm\cuc_ieschool.flv

?????文件???????4474??2014-11-11?16:32??ffmpeg_get_ppm\ffmpeg01.vcxproj

?????文件????????945??2014-11-11?15:41??ffmpeg_get_ppm\ffmpeg01.vcxproj.filters

?????文件???????1051??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\aix\math.h

?????文件??????33225??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\avisynth\avisynth_c.h

?????文件???????2679??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\avisynth\avisynth_c_25.h

?????文件??????26159??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\avisynth\avxsynth_c.h

?????文件???????1743??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\avisynth\windowsPorts\basicDataTypeConversions.h

?????文件???????2322??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\avisynth\windowsPorts\windows2linux.h

?????文件???????1140??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\float\float.h

?????文件????????872??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\float\limits.h

?????文件???????2477??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\getopt.c

?????文件???????2126??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\msvcrt\snprintf.c

?????文件??????????0??2014-11-04?10:02??ffmpeg_get_ppm\include\compat\msvcrt\snprintf.d

?????文件???????1298??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\msvcrt\snprintf.h

?????文件???????6894??2014-11-04?10:02??ffmpeg_get_ppm\include\compat\msvcrt\snprintf.o

?????文件???????3708??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\os2threads.h

?????文件????????118??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\plan9\head

?????文件???????1154??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\plan9\main.c

?????文件?????????86??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\plan9\printf

?????文件???????2126??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\snprintf.c

?????文件???????1298??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\snprintf.h

?????文件???????2778??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\strtod.c

?????文件??????????0??2014-11-04?10:02??ffmpeg_get_ppm\include\compat\strtod.d

?????文件???????9200??2014-11-04?10:02??ffmpeg_get_ppm\include\compat\strtod.o

?????文件???????1071??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\tms470\math.h

?????文件???????1064??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\va_copy.h

?????文件???????8566??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\w32pthreads.h

?????文件???????3279??2014-08-17?21:33??ffmpeg_get_ppm\include\compat\windows\makedef

?????文件?????176375??2014-11-04?10:14??ffmpeg_get_ppm\include\libavcodec\avcodec.h

............此處省略169個文件信息