颜色空间转换CSConvert：YUV420P转MonoY

技术 > 视频处理 Video CSConvert

发布时间 : 2019-10-19 22:13

字数:231 阅读 :

评论:

1、实现功能
2、C代码实现
1. THE END!

本文目录

1、实现功能
2、C代码实现
1. THE END!

1、实现功能

将YUV420P转换成亮度分量Y，比较简单，实现代码如下：

2、C代码实现

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

int main(int argc, char** argv)
{
    int width, height;
    int frame_size, frame_size_y;
    FILE *fin, *fou;
    char *y, *u, *v,*u1,*v1;
    int i, frame_num = 0;
    char outname[512] = { 0, };
    printf("\nUsage:YUV420PtoMonoY.exe input.yuv output.yuv width height\n\n");
    if (argc != 5)
    {
        return -1;
    }
    fin = fopen(argv[1], "rb");
    if (fin == NULL)
    {
        printf("error:open %s fail\n", argv[1]);
        return -1;
    }

    sprintf_s(outname,"%s", argv[2]);

    width = atoi(argv[3]);
    height = atoi(argv[4]);

    frame_size = width*height * 3 / 2;
    frame_size_y = width * height;

    y = (char *)malloc(frame_size_y);
    if (y == NULL)
    {
        printf("malloc y fail\n");
        return -1;
    }

    fou = fopen(outname, "wb");
    if (fou == NULL)
    {
        printf("error: open %s fail\n", outname);
        return -1;
    }

    while (width*height == fread(y, 1, width*height, fin))
    {
        fwrite(y, 1, frame_size_y, fou);
        fseek(fin, frame_size_y/2, SEEK_CUR);

        printf("%dth frame ok!!\n", frame_num);
        frame_num++;
    }
    printf("YUV420P to MonoY successfully!!, stotal frames: %d\n",frame_num);

    free(y);
    y = NULL;

    fclose(fin);
    fclose(fou);

    system("pause");

    return 0;
}

THE END!

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