int ir = 0xff & (pixel_rgb >> 16);
int ig = 0xff & (pixel_rgb >> 8);
int ib = 0xff & (pixel_rgb >> 0);
YUV::yuv.rgb_to_yuv_8(ir, ig, ib);
int ir = 0xff & (pixel_rgb >> 16);
int ig = 0xff & (pixel_rgb >> 8);
int ib = 0xff & (pixel_rgb >> 0);
YUV::yuv.rgb_to_yuv_8(ir, ig, ib);