extern?“C“
{
#include?“libavformat\avformat.h“
#include?“libavdevice\avdevice.h“
#include?“libswscale\swscale.h“
};

int?pNewWidth?=?0;
int?pNewHeight?=?0;

void?SetVideoframe（AVCodecContext?*pCodecCtx?AVframe?*pframe?AVframe?*pNewframe?int?pNewWidth?int?pNewHeight）
{
	pNewframe->linesize[0]?=?pNewWidth;
	pNewframe->linesize[1]?=?pNewWidth?/?2;
	pNewframe->linesize[2]?=?pNewWidth?/?2;
	struct?SwsContext?*pSwsCtx?=?NULL;
	pSwsCtx?=?sws_getContext（pCodecCtx->width?pCodecCtx->height?PIX_FMT_YUV420P?pNewWidth?pNewHeight?PIX_FMT_YUV420P?SWS_SINC?NULL?NULL?NULL）;
	if?（pSwsCtx?==?NULL）
		return;
	sws_scale（pSwsCtx?pframe->data?pframe->linesize?0?pCodecCtx->height?pNewframe->data?pNewframe->linesize）;
	sws_freeContext（pSwsCtx）;
}

int?VideoDecode（char?*VideoName?char*?YUVName）
{
	FILE?*fw?=?fopen（YUVName?“wb“）;
	if?（fw?==?NULL）
		return?-1;
	AVFormatContext?*pFormatContext?=?NULL;
	pFormatContext?=?avformat_alloc_context（）;
	if?（avformat_open_input（&pFormatContext?VideoName?NULL?NULL）?!=?0）
		return?-2;
	if?（avformat_find_stream_info（pFormatContext?NULL）?	{
		avformat_close_input（&pFormatContext）;
		return?-3;
	}
	AVCodecContext?*pCodecContext?=?NULL;
	pCodecContext?=?pFormatContext->streams[0]->codec;
	AVCodec?*pCodec?=?NULL;
	pCodec?=?avcodec_find_decoder（pCodecContext->codec_id）;
	if?（pCodec?==?NULL）
	{
		avformat_close_input（&pFormatContext）;
		return?-4;
	}
	if?（avcodec_open2（pCodecContext?pCodec?NULL）?	{
		avformat_close_input（&pFormatContext）;
		return?-5;
	}
	AVframe?*pframe?*pframeDispose;
	pframe?=?av_frame_alloc（）;
	pframeDispose?=?av_frame_alloc（）;
	if?（（pframe?==?NULL）?||?（pframeDispose?==?NULL））
	{
		avcodec_close（pCodecContext）;
		avformat_close_input（&pFormatContext）;
		return?-6;
	}

	pNewWidth?=?pCodecContext->width;
	pNewHeight?=?pCodecContext->height;

	int?DisposeSize?=?avpicture_get_size（PIX_FMT_YUV420P?pCodecContext->width?pCodecContext->height）;
	uint8_t?*DisposeBuf?=?（uint8_t?*）av_malloc（DisposeSize*sizeof（uint8_t））;
	avpicture_fill（（AVPicture?*）pframeDispose?DisposeBuf?PIX_FMT_YUV420P?pCodecContext->width?pCodecContext->height）;
	AVPacket?pPacket;
	int?got_picture_ptr?=?0;
	while?（av_read_frame（pFormatContext?&pPacket）?>=?0）
	{
		if?（pPacket.stream_index?==?0）
		{
			if?（avcodec_decode_video2（pCodecContext?pframe?&got_picture_ptr?&pPacket）?>=?0）
			{
				if?（got_picture_ptr）
				{
					SetVideoframe（pCodecContext?pframe?pframeDispose?pCodecContext->width?pCodecContext->height）;
					fwrite（DisposeBuf?1?DisposeSize?fw）;
				}
			}
		}
	}
	fclose（fw）;
	av_free（DisposeBuf）;
	av_frame_free（&pframeDispose）;
	av_frame_free（&pframe）;
	avcodec_close（pCodecContext）;
	avformat_close_input（&pFormatContext）;
	return?0;
}

int?yuv420p_to_mp4（char*?yuv420p_name?char*?mp4_name）
{
	FILE*?fr_yuv420p?=?fopen（yuv420p_name?“rb“）;
	if?（fr_yuv420p?==?NULL）
		return?-1;

	AVOutputFormat*?pOutputForm

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2017-01-05?16:47??FFmpeg_avi_to_mp4\
?????目錄???????????0??2017-01-05?16:47??FFmpeg_avi_to_mp4\Debug\
?????文件???????40960??2017-01-05?16:45??FFmpeg_avi_to_mp4\Debug\FFmpeg.exe
?????文件??????290372??2017-01-05?16:45??FFmpeg_avi_to_mp4\Debug\FFmpeg.ilk
?????文件??????478208??2017-01-05?16:45??FFmpeg_avi_to_mp4\Debug\FFmpeg.pdb
?????目錄???????????0??2017-01-05?16:47??FFmpeg_avi_to_mp4\FFmpeg\
?????文件??????104448??2017-01-05?16:00??FFmpeg_avi_to_mp4\FFmpeg\20170105.avi
?????目錄???????????0??2017-01-05?16:47??FFmpeg_avi_to_mp4\FFmpeg\Debug\
?????文件?????????927??2017-01-05?16:45??FFmpeg_avi_to_mp4\FFmpeg\Debug\FFmpeg.Build.CppClean.log
?????文件????????3554??2017-01-05?16:45??FFmpeg_avi_to_mp4\FFmpeg\Debug\FFmpeg.log
?????文件???????23416??2017-01-05?16:45??FFmpeg_avi_to_mp4\FFmpeg\Debug\FFmpeg.obj
?????目錄???????????0??2017-01-05?16:47??FFmpeg_avi_to_mp4\FFmpeg\Debug\FFmpeg.tlog\
?????文件????????8330??2017-01-05?16:45??FFmpeg_avi_to_mp4\FFmpeg\Debug\FFmpeg.tlog\CL.read.1.tlog
?????文件?????????548??2017-01-05?16:45??FFmpeg_avi_to_mp4\FFmpeg\Debug\FFmpeg.tlog\CL.write.1.tlog
?????文件?????????178??2017-01-05?16:45??FFmpeg_avi_to_mp4\FFmpeg\Debug\FFmpeg.tlog\FFmpeg.lastbuildstate
?????文件?????????682??2017-01-05?16:45??FFmpeg_avi_to_mp4\FFmpeg\Debug\FFmpeg.tlog\cl.command.1.tlog
?????文件????????1730??2017-01-05?16:45??FFmpeg_avi_to_mp4\FFmpeg\Debug\FFmpeg.tlog\link.command.1.tlog
?????文件????????3892??2017-01-05?16:45??FFmpeg_avi_to_mp4\FFmpeg\Debug\FFmpeg.tlog\link.read.1.tlog
?????文件?????????522??2017-01-05?16:45??FFmpeg_avi_to_mp4\FFmpeg\Debug\FFmpeg.tlog\link.write.1.tlog
?????文件??????150528??2017-01-05?16:45??FFmpeg_avi_to_mp4\FFmpeg\Debug\vc120.idb
?????文件??????135168??2017-01-05?16:45??FFmpeg_avi_to_mp4\FFmpeg\Debug\vc120.pdb
?????文件????????7804??2017-01-05?16:45??FFmpeg_avi_to_mp4\FFmpeg\FFmpeg.cpp
?????文件????????4482??2017-01-05?15:48??FFmpeg_avi_to_mp4\FFmpeg\FFmpeg.vcxproj
?????文件?????????955??2015-09-06?11:08??FFmpeg_avi_to_mp4\FFmpeg\FFmpeg.vcxproj.filters
?????文件?????????143??2015-09-06?11:06??FFmpeg_avi_to_mp4\FFmpeg\FFmpeg.vcxproj.user
?????文件????22361088??2015-06-05?10:06??FFmpeg_avi_to_mp4\FFmpeg\avcodec-56.dll
?????文件?????1380352??2015-06-05?10:06??FFmpeg_avi_to_mp4\FFmpeg\avdevice-56.dll
?????文件?????2393600??2015-06-05?10:06??FFmpeg_avi_to_mp4\FFmpeg\avfilter-5.dll
?????文件?????6006784??2015-06-05?10:06??FFmpeg_avi_to_mp4\FFmpeg\avformat-56.dll
?????文件??????493568??2015-06-05?10:06??FFmpeg_avi_to_mp4\FFmpeg\avutil-54.dll
?????目錄???????????0??2017-01-05?16:47??FFmpeg_avi_to_mp4\FFmpeg\include\
............此處省略123個文件信息