FFMPEG学习----打印视频信息

FFMPEG学习资料少之又少，在此推荐雷神的博客：

http://blog.csdn.net/leixiaohua1020

在这里，我们把打印视频里的相关信息作为学习FFMPEG的 Hello World程序。

#include <stdio.h>
#include <string.h>

extern "C"
{
#include "libavformat/avformat.h"
#include "libavutil/dict.h"
};

#pragma comment(lib, "avformat.lib")
#pragma comment(lib, "avutil.lib")
#pragma comment(lib, "avcodec.lib")

int main()
{
	AVFormatContext *pFormatCtx = NULL;
	AVCodecContext *pCodecCtx = NULL;
	AVCodec *pCodec;
	AVDictionaryEntry *dict = NULL;
	AVInputFormat *pInputFormat = NULL;

	int iHour, iMinute, iSecond, iTotalSeconds;//HH:MM:SS
	int videoIndex, audioIndex;

	char *fileName = "bad.mp4";
	//char *fileName = "Titanic.ts";

	av_register_all();//注册所有组件

	if (avformat_open_input(&pFormatCtx, fileName, NULL, NULL) != 0)//打开输入视频文件
	{
		printf("Couldn't open input stream.\n");
		return -1;
	}

	if (avformat_find_stream_info(pFormatCtx, NULL) < 0)
	{
		printf("Couldn't find stream information.\n");
		return -1;
	}

	videoIndex = -1;
	for (int i = 0; i < pFormatCtx->nb_streams; i++)
	{
		if (pFormatCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)//查找音频
		{
			videoIndex = i;
			break;
		}
	}
	if (videoIndex == -1)
	{
		printf("Couldn't find a video stream.\n");
		return -1;
	}

	pCodecCtx = pFormatCtx->streams[videoIndex]->codec;	//指向AVCodecContext的指针
	pCodec = avcodec_find_decoder(pCodecCtx->codec_id);	//指向AVCodec的指针.查找解码器
	if (pCodec == NULL)
	{
		printf("Codec not found.\n");
		return -1;
	}
	//打开解码器
	if (avcodec_open2(pCodecCtx, pCodec, NULL) < 0)
	{
		printf("Could not open codec.\n");
		return -1;
	}

	audioIndex = -1;
	for (int i = 0; i < pFormatCtx->nb_streams; i++)
	{
		if (pFormatCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
		{
			audioIndex = i;
			break;
		}
	}
	if (audioIndex == -1)
	{
		printf("Couldn't find a audio stream.\n");
		return -1;
	}

	//打印结构体信息

	puts("AVFormatContext信息：");
	puts("---------------------------------------------");
	printf("文件名：%s\n", pFormatCtx->filename);
	iTotalSeconds = (int)pFormatCtx->duration / 1000000;
	iHour = iTotalSeconds / 3600;//小时
	iMinute = iTotalSeconds % 3600 / 60;//分钟
	iSecond = iTotalSeconds % 60;//秒
	printf("持续时间：%02d:%02d:%02d\n", iHour, iMinute, iSecond);
	printf("平均混合码率：%d kb/s\n", pFormatCtx->bit_rate / 1000);
	printf("视音频个数：%d\n", pFormatCtx->nb_streams);
	puts("---------------------------------------------");

	puts("FFMPEG支持的所有的输入文件格式：");
	puts("---------------------------------------------");
	pInputFormat = pFormatCtx->iformat;
	while (pInputFormat)
	{
		printf("%s ", pInputFormat->name);
		pInputFormat = pInputFormat->next;
	}
	puts("\n---------------------------------------------");

	puts("AVInputFormat信息:");
	puts("---------------------------------------------");
	printf("封装格式名称：%s\n", pFormatCtx->iformat->name);
	printf("封装格式长名称：%s\n", pFormatCtx->iformat->long_name);
	printf("封装格式扩展名：%s\n", pFormatCtx->iformat->extensions);
	printf("封装格式ID：%d\n", pFormatCtx->iformat->raw_codec_id);
	puts("---------------------------------------------");

	puts("AVStream信息:");
	puts("---------------------------------------------");
	printf("视频流标识符：%d\n", pFormatCtx->streams[videoIndex]->index);
	printf("音频流标识符：%d\n", pFormatCtx->streams[audioIndex]->index);
	printf("视频流长度：%d微秒\n", pFormatCtx->streams[videoIndex]->duration);
	printf("音频流长度：%d微秒\n", pFormatCtx->streams[audioIndex]->duration);
	puts("---------------------------------------------");

	puts("AVCodecContext信息:");
	puts("---------------------------------------------");
	printf("视频码率：%d kb/s\n", pCodecCtx->bit_rate / 1000);
	printf("视频大小：%d * %d\n", pCodecCtx->width, pCodecCtx->height);
	puts("---------------------------------------------");

	puts("AVCodec信息:");
	puts("---------------------------------------------");
	printf("视频编码格式：%s\n", pCodec->name);
	printf("视频编码详细格式：%s\n", pCodec->long_name);
	puts("---------------------------------------------");

	printf("视频时长：%d微秒\n", pFormatCtx->streams[videoIndex]->duration);
	printf("音频时长：%d微秒\n", pFormatCtx->streams[audioIndex]->duration);
	printf("音频采样率：%d\n", pFormatCtx->streams[audioIndex]->codec->sample_rate);
	printf("音频信道数目：%d\n", pFormatCtx->streams[audioIndex]->codec->channels);

	puts("AVFormatContext元数据：");
	puts("---------------------------------------------");
	while (dict = av_dict_get(pFormatCtx->metadata, "", dict, AV_DICT_IGNORE_SUFFIX))
	{
		printf("[%s] = %s\n", dict->key, dict->value);
	}
	puts("---------------------------------------------");

	puts("AVStream视频元数据：");
	puts("---------------------------------------------");
	dict = NULL;
	while (dict = av_dict_get(pFormatCtx->streams[videoIndex]->metadata, "", dict, AV_DICT_IGNORE_SUFFIX))
	{
		printf("[%s] = %s\n", dict->key, dict->value);
	}
	puts("---------------------------------------------");

	puts("AVStream音频元数据：");
	puts("---------------------------------------------");
	dict = NULL;
	while (dict = av_dict_get(pFormatCtx->streams[audioIndex]->metadata, "", dict, AV_DICT_IGNORE_SUFFIX))
	{
		printf("[%s] = %s\n", dict->key, dict->value);
	}
	puts("---------------------------------------------");

	av_dump_format(pFormatCtx, -1, fileName, 0);

	printf("\n\n编译信息：\n%s\n\n", avcodec_configuration());

	avcodec_close(pCodecCtx);
	avformat_close_input(&pFormatCtx);
	return 0;
}

/*
*打印FFmpeg支持的解码器
int main(void)
{
	char *info = (char *)malloc(40000);
	memset(info, 0, 40000);

	av_register_all();

	AVCodec *c_temp = av_codec_next(NULL);

	while (c_temp != NULL)
	{
		if (c_temp->decode != NULL)
		{
			strcat(info, "[Decode]");
		}
		else
		{
			strcat(info, "[Encode]");
		}
		switch (c_temp->type)
		{
		case AVMEDIA_TYPE_VIDEO:
			strcat(info, "[Video]");
			break;
		case AVMEDIA_TYPE_AUDIO:
			strcat(info, "[Audeo]");
			break;
		default:
			strcat(info, "[Other]");
			break;
		}
		sprintf(info, "%s %10s\n", info, c_temp->long_name);
		c_temp = c_temp->next;
	}
	puts(info);
	free(info);

	return 0;
}
*/

/*
avcodec：编解码（最重要的库）
avformat：封装格式处理的库
avfilter：滤镜特效处理的库
avdevice：各种设备的输入输出
avutil：工具库（大部分库都依赖这个库）
postproc：后加工
swresample：音频采样数据格式转换
swscale：视频像素数据格式转换
*/

VS2013环境下error

error C4996: 'AVStream::codec': 被声明为已否决

解决：

输出：

AVFormatContext信息：
---------------------------------------------
文件名：bad.mp4
持续时间：00:03:39
平均混合码率：803 kb/s
视音频个数：2
---------------------------------------------
FFMPEG支持的所有的输入文件格式：
---------------------------------------------
mov,mp4,m4a,3gp,3g2,mj2 mp3 mpc mpc8 mpeg mpegts mpegtsraw mpegvideo mpjpeg mpl2
 mpsub msf msnwctcp mtv musx mv mvi mxf mxg nc nistsphere nsv nut nuv ogg oma pa
f alaw mulaw f64be f64le f32be f32le s32be s32le s24be s24le s16be s16le s8 u32b
e u32le u24be u24le u16be u16le u8 pjs pmp pva pvf qcp r3d rawvideo realtext red
spark rl2 rm roq rpl rsd rso rtp rtsp sami sap sbg sdp sdr2 film_cpk shn siff sl
n smk smjpeg smush sol sox spdif srt psxstr stl subviewer1 subviewer sup svag sw
f tak tedcaptions thp 3dostr tiertexseq tmv truehd tta txd tty v210 v210x vag vc
1 vc1test vivo vmd vobsub voc vpk vplayer vqf w64 wav wc3movie webm_dash_manifes
t webvtt wsaud wsvqa wtv wve wv xa xbin xmv xvag xwma yop yuv4mpegpipe bmp_pipe
dds_pipe dpx_pipe exr_pipe j2k_pipe jpeg_pipe jpegls_pipe pcx_pipe pictor_pipe p
ng_pipe qdraw_pipe sgi_pipe sunrast_pipe tiff_pipe webp_pipe libgme libmodplug
---------------------------------------------
AVInputFormat信息:
---------------------------------------------
封装格式名称：mov,mp4,m4a,3gp,3g2,mj2
封装格式长名称：QuickTime / MOV
封装格式扩展名：mov,mp4,m4a,3gp,3g2,mj2
封装格式ID：0
---------------------------------------------
AVStream信息:
---------------------------------------------
视频流标识符：0
音频流标识符：1
视频流长度：3362816微秒
音频流长度：9660425微秒
---------------------------------------------
AVCodecContext信息:
---------------------------------------------
视频码率：669 kb/s
视频大小：1440 * 1080
---------------------------------------------
AVCodec信息:
---------------------------------------------
视频编码格式：h264
视频编码详细格式：H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
---------------------------------------------
视频时长：3362816微秒
音频时长：9660425微秒
音频采样率：44100
音频信道数目：2
AVFormatContext元数据：
---------------------------------------------
[major_brand] = isom
[minor_version] = 512
[compatible_brands] = isomiso2avc1mp41
[encoder] = Lavf57.34.100
[title] = BadApple
[comment] = FFMPEG TEST
---------------------------------------------
AVStream视频元数据：
---------------------------------------------
[language] = und
[handler_name] = VideoHandler
---------------------------------------------
AVStream音频元数据：
---------------------------------------------
[language] = und
[handler_name] = SoundHandler
---------------------------------------------
Input #-1, mov,mp4,m4a,3gp,3g2,mj2, from 'bad.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.34.100
    title           : BadApple
    comment         : FFMPEG TEST
  Duration: 00:03:39.06, start: 0.000000, bitrate: 803 kb/s
    Stream #-1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1440x108
0 [SAR 1:1 DAR 4:3], 669 kb/s, 15 fps, 15 tbr, 15360 tbn (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #-1:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fl
tp, 130 kb/s (default)
    Metadata:
      handler_name    : SoundHandler

编译信息：
--disable-static --enable-shared --enable-gpl --enable-version3 --disable-w32thr
eads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enab
le-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --e
nable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libi
lbc --enable-libmodplug --enable-libmfx --enable-libmp3lame --enable-libopencore
-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable
-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-l
ibspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libv
o-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwe
bp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-
libzimg --enable-lzma --enable-decklink --enable-zlib

请按任意键继续. . .

FFMPEG入门第一个程序。