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;
}
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THE END!
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