用x264和ffmpeg将YUV编码为.h264(1)

参考：

1.http://blog.csdn.net/leixiaohua1020/article/details/25430425

2.http://blog.csdn.net/leixiaohua1020/article/details/42078645

操作系统版本信息为

$ cat /proc/version

Linux version 3.2.0-29-generic-pae (buildd@roseapple) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #46-Ubuntu SMP Fri Jul 27 17:25:43 UTC 2012
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.04.5 LTS
Release: 12.04
Codename: precise
$ uname -a
Linux ubuntu 3.2.0-29-generic-pae #46-Ubuntu SMP Fri Jul 27 17:25:43 UTC 2012 i686 i686 i386 GNU/Linux

一、x264 将YUV编码为.h264

1.下载安装x264

./configure --prefix=/usr --enable-shared
make
make install 

2.用安装好的x264用命令将YUV编码为.h264

./x264 cuc_ieschool_640x360_yuv420p.yuv --input-res 640x360 --dump-yuv testv/fdec-cucies420p.yuv -o ieschool420p.h264 -v

yuv文件：

https://github.com/leixiaohua1020/simplest_encoder/blob/master/cuc_ieschool_640x360_yuv420p.yuv

https://github.com/leixiaohua1020/simplest_encoder/blob/master/cuc_ieschool_640x360_yuv444p.yuv

3.用C语言代码调用x264接口将YUV编码为.h264

编译命令：

gcc simplest_x264_encoder.cpp -g -o sx264encoder -lx264

代码如下

stdint.h

https://github.com/leixiaohua1020/simplest_encoder/blob/master/simplest_x264_encoder/stdint.h

simplest_x264_encoder.cpp

/*
 * Simplest X264 Encoder
 *
 * Lei Xiaohua
 * [e-mail]
 * Communication University of China / Digital TV Technology
 * http://blog.csdn.net/leixiaohua1020
 *
 * This software encode YUV data to H.264 bitstream.
 * It's the simplest encoder example based on libx264.
 *
 * modify:openswc
 * 
 * build:
 * gcc simplest_x264_encoder.cpp -g -o sx264encoder -lx264
 * 
 */
#include <stdio.h>
#include <stdlib.h>

#include "stdint.h"

//Linux...
#ifdef __cplusplus
extern "C"
{
#endif
#include <x264.h>	
#ifdef __cplusplus
};
#endif


int main(int argc, char** argv)
{

	int ret;
	int y_size;
	int i,j;

	//FILE* fp_src  = fopen("cuc_ieschool_640x360_yuv444p.yuv", "rb");
	FILE* fp_src  = fopen("cuc_ieschool_640x360_yuv420p.yuv", "rb");

	FILE* fp_dst = fopen("cuc_ieschool.h264", "wb");

	//Encode 50 frame
	//if set 0, encode all frame
	int frame_num=50;
	int csp=X264_CSP_I420;
	int width=640,height=360;

	int iNal   = 0;
	x264_nal_t* pNals = NULL;
	x264_t* pHandle   = NULL;
	x264_picture_t* pPic_in = (x264_picture_t*)malloc(sizeof(x264_picture_t));
	x264_picture_t* pPic_out = (x264_picture_t*)malloc(sizeof(x264_picture_t));
	x264_param_t* pParam = (x264_param_t*)malloc(sizeof(x264_param_t));

	//Check
	if(fp_src==NULL||fp_dst==NULL){
		printf("Error open files.\n");
		return -1;
	}

	x264_param_default(pParam);
	pParam->i_width   = width; 
	pParam->i_height  = height;
	/*
	//Param
	pParam->i_log_level  = X264_LOG_DEBUG;
	pParam->i_threads  = X264_SYNC_LOOKAHEAD_AUTO;
	pParam->i_frame_total = 0;
	pParam->i_keyint_max = 10;
	pParam->i_bframe  = 5;
	pParam->b_open_gop  = 0;
	pParam->i_bframe_pyramid = 0;
	pParam->rc.i_qp_constant=0;
	pParam->rc.i_qp_max=0;
	pParam->rc.i_qp_min=0;
	pParam->i_bframe_adaptive = X264_B_ADAPT_TRELLIS;
	pParam->i_fps_den  = 1; 
	pParam->i_fps_num  = 25;
	pParam->i_timebase_den = pParam->i_fps_num;
	pParam->i_timebase_num = pParam->i_fps_den;
	*/
	pParam->i_csp=csp;
	x264_param_apply_profile(pParam, x264_profile_names[5]);

	pHandle = x264_encoder_open(pParam);

	x264_picture_init(pPic_out);
	x264_picture_alloc(pPic_in, csp, pParam->i_width, pParam->i_height);

	//ret = x264_encoder_headers(pHandle, &pNals, &iNal);

	y_size = pParam->i_width * pParam->i_height;
	//detect frame number
	if(frame_num==0){
		fseek(fp_src,0,SEEK_END);
		switch(csp){
		case X264_CSP_I444:frame_num=ftell(fp_src)/(y_size*3);break;
		case X264_CSP_I420:frame_num=ftell(fp_src)/(y_size*3/2);break;
		default:printf("Colorspace Not Support.\n");return -1;
		}
		fseek(fp_src,0,SEEK_SET);
	}

	//Loop to Encode
	for( i=0;i<frame_num;i++){
		switch(csp){
		case X264_CSP_I444:{
			fread(pPic_in->img.plane[0],y_size,1,fp_src);	//Y
			fread(pPic_in->img.plane[1],y_size,1,fp_src);	//U
			fread(pPic_in->img.plane[2],y_size,1,fp_src);	//V
			break;}
		case X264_CSP_I420:{
			fread(pPic_in->img.plane[0],y_size,1,fp_src);	//Y
			fread(pPic_in->img.plane[1],y_size/4,1,fp_src);	//U
			fread(pPic_in->img.plane[2],y_size/4,1,fp_src);	//V
			break;}
		default:{
			printf("Colorspace Not Support.\n");
			return -1;}
		}
		pPic_in->i_pts = i;

		ret = x264_encoder_encode(pHandle, &pNals, &iNal, pPic_in, pPic_out);
		if (ret< 0){
			printf("Error.\n");
			return -1;
		}

		printf("Succeed encode frame: %5d\n",i);

		for ( j = 0; j < iNal; ++j){
			 fwrite(pNals[j].p_payload, 1, pNals[j].i_payload, fp_dst);
		}
	}
	i=0;
	//flush encoder
	while(1){
		ret = x264_encoder_encode(pHandle, &pNals, &iNal, NULL, pPic_out);
		if(ret==0){
			break;
		}
		printf("Flush 1 frame.\n");
		for (j = 0; j < iNal; ++j){
			fwrite(pNals[j].p_payload, 1, pNals[j].i_payload, fp_dst);
		}
		i++;
	}
	x264_picture_clean(pPic_in);
	x264_encoder_close(pHandle);
	pHandle = NULL;

	free(pPic_in);
	free(pPic_out);
	free(pParam);

	fclose(fp_src);
	fclose(fp_dst);

	return 0;
}