请用C语言按如下要求实现程序 将从摄像头获取的yuyv数据 char* buffer,编码并保存为h264视频 关键参数:分辨率640*480, 帧率30, X264_CSP_YUYV,输入文件input.yuyv,输出文件,output.h264
时间: 2024-03-04 08:53:01 浏览: 30
以下是用C语言实现将YUYV数据编码为H.264视频的代码,其中使用了x264库:
```
#include <stdio.h>
#include <stdint.h>
#include <x264.h>
#define WIDTH 640
#define HEIGHT 480
#define FPS 30
int main()
{
// 打开输入文件
FILE *input_file = fopen("input.yuyv", "rb");
if (!input_file) {
fprintf(stderr, "Failed to open input file.\n");
return 1;
}
// 创建x264编码器
x264_param_t param;
x264_param_default_preset(¶m, "ultrafast", "zerolatency");
param.i_width = WIDTH;
param.i_height = HEIGHT;
param.i_fps_num = FPS;
param.i_fps_den = 1;
param.i_csp = X264_CSP_YUYV;
x264_t *encoder = x264_encoder_open(¶m);
if (!encoder) {
fprintf(stderr, "Failed to open x264 encoder.\n");
return 1;
}
// 打开输出文件
FILE *output_file = fopen("output.h264", "wb");
if (!output_file) {
fprintf(stderr, "Failed to open output file.\n");
return 1;
}
// 读取并编码每一帧数据
int i, j;
uint8_t *yuyv_frame = malloc(WIDTH * HEIGHT * 2);
x264_picture_t pic_in, pic_out;
x264_picture_alloc(&pic_in, X264_CSP_YUYV, WIDTH, HEIGHT);
while (fread(yuyv_frame, 1, WIDTH * HEIGHT * 2, input_file) == WIDTH * HEIGHT * 2) {
// 将YUYV数据转换为YUV420P格式
for (i = 0; i < HEIGHT; i++) {
for (j = 0; j < WIDTH; j += 2) {
uint8_t y0 = yuyv_frame[i * WIDTH * 2 + j * 2 + 0];
uint8_t u = yuyv_frame[i * WIDTH * 2 + j * 2 + 1];
uint8_t y1 = yuyv_frame[i * WIDTH * 2 + j * 2 + 2];
uint8_t v = yuyv_frame[i * WIDTH * 2 + j * 2 + 3];
pic_in.img.plane[0][i * WIDTH + j + 0] = y0;
pic_in.img.plane[0][i * WIDTH + j + 1] = y1;
pic_in.img.plane[1][i/2 * WIDTH/2 + j/2] = u;
pic_in.img.plane[2][i/2 * WIDTH/2 + j/2] = v;
}
}
// 编码当前帧
x264_nal_t *nal;
int i_nal;
int frame_size = x264_encoder_encode(encoder, &nal, &i_nal, &pic_in, &pic_out);
if (frame_size < 0) {
fprintf(stderr, "Encoding failed.\n");
return 1;
}
// 将编码后的数据写入输出文件
for (i = 0; i < i_nal; i++) {
fwrite(nal[i].p_payload, 1, nal[i].i_payload, output_file);
}
}
// 关闭文件和编码器
free(yuyv_frame);
x264_encoder_close(encoder);
fclose(input_file);
fclose(output_file);
return 0;
}
```
注意,上面的代码只是示例代码,实际使用中可能还需要添加一些错误处理和其他功能。