simplest

simplest"/>

simplest

参考雷神的例子（）改成了新版的ffmpeg接口，.

av_dict_set(&param, "preset", "slow", 0); &param网站转码存在问题。

大部分问题参考了

flush函数也是类似的方法，刚刚开始研究ffmpeg  也不知道改的对不对。欢迎大家留言指正

flush函数还是有问题，直接屏蔽了。

参考了.html  解决了掉帧的问题

/**
* 最简单的基于FFmpeg的视频编码器
* Simplest FFmpeg Video Encoder
*
* 雷霄骅 Lei Xiaohua
* leixiaohua1020@126
* 中国传媒大学/数字电视技术
* Communication University of China / Digital TV Technology
* 
*
* 本程序实现了YUV像素数据编码为视频码流（H264，MPEG2，VP8等等）。
* 是最简单的FFmpeg视频编码方面的教程。
* 通过学习本例子可以了解FFmpeg的编码流程。
* This software encode YUV420P data to H.264 bitstream.
* It's the simplest video encoding software based on FFmpeg.
* Suitable for beginner of FFmpeg
*/#include <stdio.h>#define __STDC_CONSTANT_MACROS#ifdef _WIN32
//Windows
extern "C"
{
#include "libavutil/opt.h"
#include "libavcodec/avcodec.h"
#include "libavformat/avformat.h"
#include "libavutil/imgutils.h"
};
#else
//Linux...
#ifdef __cplusplus
extern "C"
{
#endif
#include <libavutil/opt.h>
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#ifdef __cplusplus
};
#endif
#endifint flush_encoder(AVFormatContext *fmt_ctx, AVCodecContext *pCodecCtx, unsigned int stream_index) {int ret;int got_frame;AVPacket enc_pkt;// 用于查找FFmpeg的解码器（参考FFmpeg解码流程图）AVCodec* pCodec = avcodec_find_decoder(pCodecCtx->codec_id);if (pCodec == NULL) {printf("Codec not found.\n");return -1;}if (!(pCodec->capabilities & AV_CODEC_CAP_DELAY))return 0;while (1) {enc_pkt.data = NULL;enc_pkt.size = 0;av_init_packet(&enc_pkt);//ret = avcodec_encode_video2(pCodecCtx, &enc_pkt,NULL, &got_frame);ret = avcodec_send_frame(pCodecCtx, NULL);got_frame = avcodec_receive_packet(pCodecCtx, &enc_pkt);if (ret < 0){ret = 0;break;}if (got_frame!=0) {ret = 0;break;}printf("Flush Encoder: Succeed to encode 1 frame!\tsize:%5d\n", enc_pkt.size);/* mux encoded frame */ret = av_write_frame(fmt_ctx, &enc_pkt);if (ret < 0)break;av_frame_free(NULL);}return ret;
}int main(int argc, char* argv[])
{AVFormatContext* pFormatCtx;AVOutputFormat* fmt;AVStream* video_st;AVCodecContext* pCodecCtx;AVCodec* pCodec;AVPacket pkt;uint8_t* picture_buf;AVFrame* pFrame;int picture_size;int y_size;int framecnt = 0;int ret = -1;//FILE *in_file = fopen("src01_480x272.yuv", "rb");	//Input raw YUV data FILE *in_file;fopen_s(&in_file,"d:/ds_480x272.yuv", "rb");   //Input raw YUV dataint in_w = 480, in_h = 272;                              //Input data's width and heightint framenum = 100;                                   //Frames to encode//const char* out_file = "src01.h264";              //Output Filepath //const char* out_file = "src01.ts";//const char* out_file = "src01.hevc";const char* out_file = "d:/ds.h264";//av_register_all();Method1.//pFormatCtx = avformat_alloc_context();Guess Format//fmt = av_guess_format(NULL, out_file, NULL);//pFormatCtx->oformat = fmt;Method 2.avformat_alloc_output_context2(&pFormatCtx, NULL, NULL, out_file);fmt = pFormatCtx->oformat;//Open output URLif (avio_open(&pFormatCtx->pb, out_file, AVIO_FLAG_READ_WRITE) < 0) {printf("Failed to open output file! \n");return -1;}video_st = avformat_new_stream(pFormatCtx, 0);//video_st->time_base.num = 1; //video_st->time_base.den = 25;  if (video_st == NULL) {return -1;}//Param that must set//pCodecCtx = video_st->codec;pCodecCtx = avcodec_alloc_context3(NULL);avcodec_parameters_to_context(pCodecCtx, video_st->codecpar);//pCodecCtx->codec_id =AV_CODEC_ID_HEVC;pCodecCtx->codec_id = fmt->video_codec;pCodecCtx->codec_type = AVMEDIA_TYPE_VIDEO;pCodecCtx->pix_fmt = AV_PIX_FMT_YUV420P;pCodecCtx->width = in_w;pCodecCtx->height = in_h;pCodecCtx->bit_rate = 400000;pCodecCtx->gop_size = 250;pCodecCtx->time_base.num = 1;pCodecCtx->time_base.den = 25;//H264//pCodecCtx->me_range = 16;//pCodecCtx->max_qdiff = 4;//pCodecCtx->qcompress = 0.6;pCodecCtx->qmin = 10;pCodecCtx->qmax = 51;//Optional ParampCodecCtx->max_b_frames = 3;// Set OptionAVDictionary *param = 0;//H.264if (pCodecCtx->codec_id == AV_CODEC_ID_H264) {av_dict_set(&param, "preset", "slow", 0);av_dict_set(&param, "tune", "zerolatency", 0);//av_dict_set(&param, "profile", "main", 0);}//H.265if (pCodecCtx->codec_id == AV_CODEC_ID_H265) {av_dict_set(&param, "preset", "ultrafast", 0);av_dict_set(&param, "tune", "zero-latency", 0);}//Show some Informationav_dump_format(pFormatCtx, 0, out_file, 1);pCodec = avcodec_find_encoder(pCodecCtx->codec_id);if (!pCodec) {printf("Can not find encoder! \n");return -1;}if (avcodec_open2(pCodecCtx, pCodec, &param) < 0) {printf("Failed to open encoder! \n");return -1;}pFrame = av_frame_alloc();//设置真的格式、宽度和高度，否则会出现//1.AVFrame.format is not set//AVFrame.width or height is not setpFrame->format = pCodecCtx->pix_fmt;pFrame->width = pCodecCtx->width;pFrame->height = pCodecCtx->height;//picture_size = avpicture_get_size(pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height);picture_size = av_image_get_buffer_size(pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height, 1);picture_buf = (uint8_t *)av_malloc(picture_size);//avpicture_fill((AVPicture *)pFrame, picture_buf, pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height);ret = av_image_fill_arrays(pFrame->data, pFrame->linesize, picture_buf, pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height, 1);//FIX:avformat_write_header return -22pFormatCtx->streams[0]->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;pFormatCtx->streams[0]->codecpar->width = in_w;pFormatCtx->streams[0]->codecpar->height = in_h;//Write File Headerint ert = avformat_write_header(pFormatCtx, NULL);av_new_packet(&pkt, picture_size*3);y_size = pCodecCtx->width * pCodecCtx->height;int skipped_frame = 0;for (int i = 0; i<framenum; i++) {//Read raw YUV dataif (fread(picture_buf, 1, y_size * 3 / 2, in_file) <= 0) {printf("Failed to read raw data! \n");return -1;}else if (feof(in_file)) {break;}pFrame->data[0] = picture_buf;              // YpFrame->data[1] = picture_buf + y_size;      // U pFrame->data[2] = picture_buf + y_size * 5 / 4;  // V//PTS//pFrame->pts=i;pFrame->pts = i*(video_st->time_base.den) / ((video_st->time_base.num) * 25);int got_picture = 0;//Encode//int ret = avcodec_encode_video2(pCodecCtx, &pkt, pFrame, &got_picture);ret = avcodec_send_frame(pCodecCtx, pFrame);got_picture = avcodec_receive_packet(pCodecCtx, &pkt);if (ret < 0) {printf("Failed to encode! \n");return -1;}if (got_picture == 0) {printf("Succeed to encode frame: %5d\tsize:%5d\n", framecnt, pkt.size);framecnt++;pkt.stream_index = video_st->index;av_write_frame(pFormatCtx, &pkt);av_packet_unref(&pkt);}else{skipped_frame++;}}Flush Encoder//ret = flush_encoder(pFormatCtx, pCodecCtx, 0);//if (ret < 0) {//	printf("Flushing encoder failed\n");//	return -1;//}for (int i = skipped_frame; i>0; i--){int got_picture = 0;//Encode//ret = avcodec_decode_video2(video_dec_ctx, vframe, &got_frame, &packet);ret = avcodec_send_frame(pCodecCtx, pFrame);got_picture = avcodec_receive_packet(pCodecCtx, &pkt);if (got_picture==0) {pkt.pts = av_rescale_q(pkt.pts, pFormatCtx->streams[0]->time_base, pFormatCtx->streams[0]->time_base);av_write_frame(pFormatCtx, &pkt);}}//Write file trailerav_write_trailer(pFormatCtx);//Cleanif (video_st) {avcodec_close(pCodecCtx);av_free(pFrame);av_free(picture_buf);}avio_close(pFormatCtx->pb);avformat_free_context(pFormatCtx);fclose(in_file);system("pause");return 0;
}