int split_yuv(char *str, uint height, uint width)
{

    FILE *fp;
    FILE *fpy;
    FILE *fpu;
    FILE *fpv;

    unsigned char  *buf = (unsigned char *)malloc(height * width * 3 / 2);

    fp = fopen(str, "r");
    fpy = fopen("y.bin", "wa");
    fpu = fopen("u.bin", "wa");
    fpv = fopen("v.bin", "wa");
    if(!fpv || !fpu || !fpy || !fp){
         fprintf(stderr, "line %d open file error.\n", __LINE__);
        return FALSE;
    }

    fread(buf, 1, height * width * 3 / 2, fp);
    fwrite(buf, 1, height * width , fpy);
    fwrite(buf + height * width, 1, height * width >> 2, fpu);
    fwrite(buf + (uint)(height * width * 5 / 4), 1, height * width >> 2, fpv);

    fclose(fpv);
    fclose(fpu);
    fclose(fpy);
    fclose(fp);
    free(buf);

    return TRUE;
}