X264编码

最近研究了x264 , 果然高效简单，不过还有很多概念有待研究。记录最简单的实现，直接上代码

#include <stdint.h>

#include "x264.h"

#include "x264_config.h"

#include <stdio.h>

int main()

{

    int width = 480;

    int height = 272;

    int fps = 25;

    size_t yuv_size = width * height *3/2;

    x264_t *encoder;

    x264_picture_t pic_in,pic_out;

    int inf,outf;

    uint8_t *yuv_buffer;

 

     x264_param_t m_param;

     x264_param_default_preset(&m_param,"veryfast","zerolatency");

     m_param.i_threads = 1;

     m_param.i_width = width;

     m_param.i_height = height;

     m_param.i_fps_num = fps;

     m_param.i_bframe = 10;

     m_param.i_fps_den = 1;

     m_param.i_keyint_max = 25;

     m_param.b_intra_refresh = 1;

     m_param.b_annexb = 1;

     x264_param_apply_profile(&m_param,"high422");

     encoder = x264_encoder_open(&m_param);

    x264_encoder_parameters( encoder, &m_param );

    

     x264_picture_alloc(&pic_in, X264_CSP_I420, width, height);

     yuv_buffer = malloc(yuv_size);

     pic_in.img.plane[0] = yuv_buffer;

     pic_in.img.plane[1] = pic_in.img.plane[0] + width * height;

     pic_in.img.plane[2] = pic_in.img.plane[1] + width * height / 4;

    FILE* infile = fopen("ds_480x272.yuv","rb");

    FILE* outfile = fopen("out.h264","ab");

    if(!infile || !outfile)

        {

            printf("open file error\n");

            return 0;

        }

    int64_t i_pts = 0;

 

      x264_nal_t *nals;

      int nnal;

      while (fread(yuv_buffer, 1,yuv_size, infile) > 0) {

          pic_in.i_pts = i_pts++;

          x264_encoder_encode(encoder, &nals, &nnal, &pic_in, &pic_out);

          x264_nal_t *nal;

          for (nal = nals; nal < nals + nnal; nal++) {

             fwrite(nal->p_payload, 1,nal->i_payload,outfile);

         }

     }

    x264_encoder_close(encoder);

 close(infile);

 close(outfile);

 free(yuv_buffer);

    return 0;

}