#include?

extern?“C“//包含C文件頭
{
#include?“l(fā)ibavformat/avformat.h“
};
#define?DATASIZE?1024*1024

AVStream?*add_vidio_stream（AVFormatContext?*oc?enum?AVCodecID?codec_id）//用以初始化一個用于輸出的AVFormatContext結(jié)構(gòu)體
{
	AVStream?*st;
	AVCodec?*codec;

	st?=?avformat_new_stream（oc?NULL）;
	if?（!st）
	{
		printf（“Could?not?alloc?stream\n“）;
		exit（1）;
	}
	codec?=?avcodec_find_encoder（codec_id）;//查找mjpeg解碼器
	if?（!codec）
	{
		printf（“codec?not?found\n“）;
		exit（1）;
	}
	avcodec_get_context_defaults3（st->codec?codec）;//申請AVStream->codec（AVCodecContext對象）空間并設置默認值（由avcodec_get_context_defaults3（）設置

	st->codec->bit_rate?=?400000;//設置采樣參數(shù)，即比特率??
	st->codec->width?=?1080;//設置視頻寬高，這里跟圖片的寬高保存一致即可
	st->codec->height?=?1800;
	st->codec->time_base.den?=?10;//設置幀率
	st->codec->time_base.num?=?1;

	st->codec->pix_fmt?=?PIX_FMT_YUV420P;//設置像素格式??
	st->codec->codec_tag?=?0;
	if?（oc->oformat->flags?&?AVFMT_GLOBALHEADER）//一些格式需要視頻流數(shù)據(jù)頭分開
		st->codec->flags?|=?CODEC_FLAG_GLOBAL_HEADER;
	return?st;
}

void?main（）
{
	AVFormatContext?*ofmt_ctx?=?NULL;//其包含碼流參數(shù)較多，是一個貫穿始終的數(shù)據(jù)結(jié)構(gòu)，很多函數(shù)都要用到它作為參數(shù)
	const?char?*out_filename?=?“out.mkv“;//輸出文件路徑，在這里也可以將mkv改成別的ffmpeg支持的格式，如mp4，flv，avi之類的
	int?ret;//返回標志

	av_register_all（）;//初始化解碼器和復用器
	avformat_alloc_output_context2（&ofmt_ctx?NULL?NULL?out_filename）;//初始化一個用于輸出的AVFormatContext結(jié)構(gòu)體，視頻幀率和寬高在此函數(shù)里面設置
	if?（!ofmt_ctx）
	{
		printf（“Could?not?create?output?context\n“）;
		return;
	}

	AVStream?*out_stream?=?add_vidio_stream（ofmt_ctx?AV_CODEC_ID_MJPEG）;//創(chuàng)造輸出視頻流
	av_dump_format（ofmt_ctx?0?out_filename?1）;//該函數(shù)會打印出視頻流的信息，如果看著不開心可以不要

	if?（!（ofmt_ctx->oformat->flags?&?AVFMT_NOFILE））//打開輸出視頻文件
	{
		ret?=?avio_open（&ofmt_ctx->pb?out_filename?AVIO_FLAG_WRITE）;
		if?（ret?			printf（“Could?not?open?output?file?‘%s‘“?out_filename）;
			return;
		}
	}

	if?（avformat_write_header（ofmt_ctx?NULL）?	{
		printf（“Error?occurred?when?opening?output?file\n“）;
		return;
	}

	int?frame_index?=?0;//放入視頻的圖像計數(shù)
	unsigned?char?*mydata?=?new?unsigned?char[DATASIZE];
	AVPacket?pkt;
	av_init_packet（&pkt）;
	pkt.flags?|=?AV_PKT_FLAG_KEY;
	pkt.stream_index?=?out_stream->index;//獲取視頻信息，為壓入幀圖像做準備
	while?（frame_index<100）//將圖像壓入視頻中
	{
		FILE?*file;//打開一張jpeg圖像并讀取其數(shù)據(jù)，在這里圖像最大為1M如果超過1M，則需要修改1024*1024這里
		fopen_s（&file?“1.jpg“?“rb“）;
		pkt.size?=?fread（mydata?1?DATASIZE?file）;
		pkt.data?=?mydata;
		fclose（file）;
		if?（av_interleaved_write_frame（ofmt_ctx?&pkt）?		{
			printf（“Error?muxing?packet\n“）;
			break;
		}
		printf（“Write?%8d?frames?to?output?file\n“?frame_index）;//打印出當前壓入的幀數(shù)
		frame_index++;
	}
	av_free_packet（&pkt）;//釋放掉幀數(shù)據(jù)包對象
	av_write_trailer（ofmt_ctx）;//寫文件尾（Write?file?trailer）
	delete[]mydata;//釋放數(shù)據(jù)對象
	if?（ofmt_ctx?&&?!（ofmt_ctx->oformat->flags?&?AVFMT_NOFILE））
		avio_close（ofmt_ctx->pb）;//關閉視頻文件
	avformat_free_context（ofmt_ctx）;//釋放輸出視頻相關數(shù)據(jù)結(jié)構(gòu)
	return;
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2015-05-20?16:33??JpegToVideo\
?????目錄???????????0??2015-05-20?16:33??JpegToVideo\Debug\
?????目錄???????????0??2015-05-20?16:33??JpegToVideo\JpegToVideo\
?????文件?????????979??2015-05-20?15:56??JpegToVideo\JpegToVideo.sln
?????文件???????16896??2015-05-20?16:32??JpegToVideo\JpegToVideo.v12.suo
?????文件??????654124??2014-09-13?19:10??JpegToVideo\JpegToVideo\1.jpg
?????文件????18936320??2014-05-06?10:08??JpegToVideo\JpegToVideo\avcodec-55.dll
?????文件?????1340928??2014-05-06?10:08??JpegToVideo\JpegToVideo\avdevice-55.dll
?????文件?????2034688??2014-05-06?10:08??JpegToVideo\JpegToVideo\avfilter-4.dll
?????文件?????5342720??2014-05-06?10:08??JpegToVideo\JpegToVideo\avformat-55.dll
?????文件??????418304??2014-05-06?10:08??JpegToVideo\JpegToVideo\avutil-52.dll
?????目錄???????????0??2015-05-20?16:33??JpegToVideo\JpegToVideo\Debug\
?????目錄???????????0??2015-05-20?16:00??JpegToVideo\JpegToVideo\include\
?????文件????????5721??2012-05-23?20:03??JpegToVideo\JpegToVideo\include\inttypes.h
?????目錄???????????0??2015-05-20?16:00??JpegToVideo\JpegToVideo\include\libavcodec\
?????文件??????175612??2014-05-06?10:08??JpegToVideo\JpegToVideo\include\libavcodec\avcodec.h
?????文件????????3111??2014-05-06?10:08??JpegToVideo\JpegToVideo\include\libavcodec\avfft.h
?????文件????????2392??2014-05-06?10:08??JpegToVideo\JpegToVideo\include\libavcodec\dxva2.h
?????文件???????10654??2014-05-06?10:08??JpegToVideo\JpegToVideo\include\libavcodec\old_codec_ids.h
?????文件????????4007??2014-05-06?10:08??JpegToVideo\JpegToVideo\include\libavcodec\vaapi.h
?????文件????????4094??2014-05-06?10:08??JpegToVideo\JpegToVideo\include\libavcodec\vda.h
?????文件????????6200??2014-05-06?10:08??JpegToVideo\JpegToVideo\include\libavcodec\vdpau.h
?????文件????????5593??2014-05-06?10:08??JpegToVideo\JpegToVideo\include\libavcodec\version.h
?????文件????????6062??2014-05-06?10:08??JpegToVideo\JpegToVideo\include\libavcodec\xvmc.h
?????目錄???????????0??2015-05-20?16:00??JpegToVideo\JpegToVideo\include\libavdevice\
?????文件???????16642??2014-05-06?10:08??JpegToVideo\JpegToVideo\include\libavdevice\avdevice.h
?????文件????????1861??2014-05-06?10:08??JpegToVideo\JpegToVideo\include\libavdevice\version.h
?????目錄???????????0??2015-05-20?16:00??JpegToVideo\JpegToVideo\include\libavfilter\
?????文件????????3321??2014-05-06?10:08??JpegToVideo\JpegToVideo\include\libavfilter\asrc_abuffer.h
?????文件????????3784??2014-05-06?10:08??JpegToVideo\JpegToVideo\include\libavfilter\avcodec.h
?????文件???????56887??2014-05-06?10:08??JpegToVideo\JpegToVideo\include\libavfilter\avfilter.h
............此處省略92個文件信息